JPH0963176A - Video cd reproducing device and method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recognize a current reproducing position and to prevent the delay of operation by displaying the current reproducing position in the section of a continuous image and arbitrarily changing the reproducing speed. SOLUTION: A video CD control circuit 4 reads out TOC information and stores it in a memory 5 when a video CD 1 is inserted in a driving part 2. At the time of reproduction, a starting address and an ending address of video sequence are taken out. Address information during reproduction is obtained from a video CD processing circuit 7. The video CD control circuit 4 calculates a position for icon display of the current reproducing position based on the obtained data and displays it on a CRT 12 superposing on an image screen through an audio/video driving circuit 9. On the other hand, the skip width of the reproducing address is changed by means of a remote commander 11 by operating a reproducing speed volume and the reproducing speed is arbitrarily changed. Consequently, the reproducing position of the current image is recognized, next operation is efficiently performed and delay is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video CD reproducing apparatus and a video CD reproducing method, and more particularly to a video CD reproducing apparatus and a video CD reproducing apparatus for displaying the current reproduction position and arbitrarily changing the reproduction speed. Regarding the method.

[0002]

2. Description of the Related Art In recent years, a CD reproducing apparatus for reproducing various data recorded on a CD (Compact Disk) has become widespread. This CD is originally a digital recording of audio data such as music, but recently, a CD-ROM recording various software has been used as a recording medium instead of a floppy disk.

On the other hand, an LD (Laser Disk) in which an analog video signal is FM-modulated and recorded has become popular with a video tape. In recent years, an analog video signal is converted into a digital signal, and an MPEG (Moving Picture Experts Group) system is used. Has established a standard for a video CD to be compressed and recorded, and this video CD is drawing attention as an audio / visual recording medium replacing an LD.

This video CD has, in addition to audiovisual information,
Playback control information used in playback control is stored. In the playback control, a menu still image is displayed, and the user can perform a key input operation from this menu still image to interactively select a video to be reproduced next.

The types of video screens are classified into three types: moving images, still images (slide row), and menu still images.
Of these, the menu still image is a screen for requesting a user action (key input operation), and is a key input screen for selecting a video or audio to be reproduced next.

FIG. 16 is a diagram for explaining an interactive screen selection when a video CD is played back by using playback control.

In the example shown in FIG. 16, when the user plays the video CD, the video screen is first displayed as the moving image 1.
B-1 is played, followed by still image sequence (slide sequence) 1
B-2, menu still image 1 B-3 is reproduced. The screen of the menu still image 1B-3 is a screen requesting the user's selection.

From this selection screen, when the user selects 1 by the key input operation, the image to be reproduced next becomes the moving image 2B-31, and when 2 is selected,
The image to be reproduced next is the menu still image 2B-32.

Similarly, when the user selects 1 on the screen of the menu still image 2 B32, the image to be reproduced next is still image 2 B-321, and when 2 is selected, the next image is reproduced. The image to be reproduced is the still image sequence 2 B-322, and when 3 is selected, the image to be reproduced next is the moving image 4 B-323-1. The video image to be reproduced next to the moving image 4B-323-1 is the moving image 3B-323-2.

The moving image and the still image are reproduced by processing the playlist of the playback control information, and the menu still image is reproduced by processing the selection list of the playback control information.

In the playback control of FIG. 16, the moving picture 1 B-1 is reproduced by the first playlist, and the still picture sequence (slide sequence) 1 B- by the second play list designated by the first play list. 2 is played, 2nd
The menu still image 1B-3 is reproduced by the first selection list designated by the playlist of No. 1.

When the user inputs a selection key from the screen of the menu still image 1B-3, the list corresponding to the input key specified in the first selection list is selected, and the next list is selected according to the selected list. Is played.

FIG. 17 shows the disc format of a Ver2.0 video CD. N (up to 99) tracks are formed between the innermost lead-in area and the outermost lead-out area. Of these, in the track 1, video CD information A, which is information about the video CD, is accumulated from the 4.00 second position.

This video CD information A is
File INFO.V of video CD standard name and album ID information
File A of CD A1, sequence playback start time information ENT
RIES.VCD A2, video and still image ID information file LOT
(List id Offset Table) .VCDA3 and file PSD (Play Sequence Descri) as playback control data
ptor) .VCD A4.

The PSD.VCD A4 is composed of a playlist A41 and a selection list A42.

FIG. 18 shows an example of the selection list.

The selection list has a header of 18H, and in the example shown in FIG. 18, the data 18H of the data address 0208HB1 represents the header of the selection list.

In the selection list shown in this example, the PREVIOUS list information B2 specifies the list to be processed next when the user selects the PREVIOUS key. Similarly, the NEXT list information B3 specifies the list to be processed next when the user selects the NEXT key, and the RETURN list information B4 processes the next when the user selects the RETURN (STOP) key. The DEFAULT list information B5 specifies the list to be processed next when the user selects the DEFAULT key.

The values of the PREVIOUS list information B2, the NEXT list information B3, and the DEFAULT list information B5 are FFFFH, which means invalid (that is, the operation is ignored). The RETURN list information B4 is 0035H, which specifies the list of addresses indicated by 0035H * 8H = 01A8H (that is, the list to be processed next is the list of address 01A8H).

In this example, numerical keys 1 to 4 are designated as the selection keys in addition to the above selection keys. If the user selects the numeric key 1, SELECTION
# 1 OFFSET information B10 specifies the list to be processed next,
SELECTION # 2 O if the user selects the numeric key 2
If the FFSET information B11 specifies the list to be processed next and the user selects the numeric key 3, SELECTION # 3 OFFSE
When the T information B12 specifies the list to be processed next and the user selects the numeric key 4, the SELECTION # 4 OFFSET information B13 specifies the list to be processed next.

SELECTION # 1 OFFSET information B10 is 0045H
This specifies the list of addresses indicated by 0045H * 8H = 0228H, and SELECTION # 2 OFFSET information B1.
1 is 0047H, which specifies the list of addresses indicated by 0047H * 8H = 0238H, and SELECTION # 3 OFF
The SET information B12 is 0049H, which is 0049H * 8H = 024.
Specify the list of addresses indicated by 8H, and select
ION # 4 OFFSET information B13 is 004BH, which is 00
The list of addresses indicated by 45B * 8H = 0258H is specified.

Also, PLAY ITEM NUMBER in this list
B9 is 04CAH = 1226, which means that the menu still image of the address indicated by this value is reproduced, and after the reproduction, the key input from the user is awaited. WAIT TIME
FOR TIMEOUT B7 indicates the key input waiting time in this case, which is 0 AH in this example, which represents 10 seconds.

LOOP COUNT & JUMP TIMING B8 is PLAY
Menu specified by ITEM NUMBER B9 Specifies how many times the still image is played back. The lower 7 bits represent the number of repetitions, and when 0, it means infinite times. If the highest BIT is 0, it means that the corresponding list is processed when the user inputs a key.
When IT is 1, it means that the list corresponding to the key input from the user is processed after the play item currently being executed is reproduced. In this example, LOOP COUNT & J
Since UMP TIMING B8 is 83H, the reproduction of the menu still image is repeated up to three times, and the list corresponding to the key input from the user is processed after the reproduction of the currently executed play item.

FIG. 19 shows an example of a play list.

The playlist has a header of 10H, and in the example shown in FIG. 19, the data of data address 0090H C1.
10H represents the header of the playlist.

In this example, PLAY ITEM # 1 NUMBER C4
Is 03F5H = 1013, which means to reproduce the moving image or still image of the address indicated by this value. Also, PREVIOUS list information, NEXT list information, and RETU
All RN list information is 000EH, which is 000EH * 8H =
The list of addresses indicated by H is specified. When there is no key input from the user during the processing of this playlist, the list indicated by the NEXT list information is processed after the processing of this playlist is completed.

PLAY ITEM WAIT TIME C2 is PLAY ITEM
# 1 NUMBER Indicates the waiting time to wait for a key input from the user after the playback of the video or still image at the address indicated by C4. If the value is 0, it means that there is no waiting time, and the value is If 1 to 60, waiting time is 1 to 6
It means 0 seconds, and if the value is 61, the waiting time is 70
Second means that if the value is 62, the waiting time means 80 seconds, and if the value is N, the waiting time is (N-6
0) * 10 + 60 seconds, and if the value is FFH, the waiting time means infinite. In this example, PLAY ITE
M WAIT TIMEC2 is FFH, which means to wait until the user inputs a key.

AUTO PAUSE WAIT TIME C3 is AUTO PAUS
E Indicates the time for processing. In this example, AUTO PAUS
E WAIT TIME C3 is FFH, which means that AUTO PAUSE processing is performed until the user inputs a key.

FIG. 20 shows a second example of the selection list and play list.

The data 18H of the data address 0138H represents the header of the selection list, and the data 10H of the data address 0150H represents the header of the playlist.

In this example of the selection list, the numeric keys 1 and 2 are designated as the selection keys. SELECT
ION # 1 OFFSET information is 002AH, which is 002AH * 8H
= 0150H specifies the list of addresses, that is, the playlist next to this selection list (LI
ST NO16) is specified.

As described above, the conventional video CD reproducing device combines the audio, the moving image, the still image, and the menu still image by using the play list and the selection list accumulated in the video CD by the playback control, It is adapted to interactively reproduce a video / audio signal.

[0033]

However, in the conventional video CD reproducing apparatus, during normal speed reproduction of the video CD,
Alternatively, since it is not possible to display the position being reproduced during skip reproduction, the user cannot grasp where the current reproduction position is located within a logical video segment (sequence) indicating one continuous video. As a result, there is a problem that the information for performing the next operation is scarce and the operation is delayed.

Further, in the conventional video CD reproducing apparatus, whether the reproduction speed is fixedly determined at the time of initial setting by the user's key operation or at the time of producing the video CD reproducing apparatus,
It is fixedly determined by the scan data (data that specifies the address to be reproduced next) in the video CD, and it is not intended because the skip speed cannot be freely changed by a specific operation during skip reproduction. There was a problem that control such as skipping the image earlier could not be performed.

The present invention has been made in view of such a situation, and it is possible to display the reproduction position and to arbitrarily change the reproduction speed.

[0036]

A video CD reproducing apparatus according to a first aspect of the present invention is provided with an output means for outputting a signal for displaying a current reproduction position within a boundary of one continuous image. .

The video CD reproducing apparatus according to claim 3 is
It is characterized in that it is provided with a changing means for arbitrarily changing the reproduction speed.

The video CD reproducing method according to claim 4 is
It is characterized in that a signal for displaying the current reproduction position within one continuous video segment is output.

The video CD reproducing method according to claim 5 is
The feature is that the reproduction speed is arbitrarily changed.

In the video CD reproducing apparatus according to the first aspect, the output means outputs a signal for displaying the current reproduction position within the division of one continuous image.

In the video CD reproducing apparatus according to the third aspect, the changing means arbitrarily changes the reproducing speed.

In the video CD reproducing method according to the fourth aspect of the present invention, a signal for displaying the current reproduction position within one continuous video segment is output.

In the video CD reproducing method according to the fifth aspect, the reproducing speed changes arbitrarily.

[0044]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below. In order to clarify the correspondence between each means described in the claims and the following embodiments, parentheses after each means are described. Within
The characteristics of the present invention will be described as follows by adding a corresponding embodiment (but one example). However, of course,
It does not mean that each means is limited to those described.

The video CD reproducing apparatus according to claim 1 is
Decoding means (for example, the video CD processing circuit 7 in FIG. 1) that decodes the compressed coded signal reproduced from the video CD and outputs a digital image signal or a digital audio signal, and playback control information reproduced from the video CD. A control means (for example, the video CD control circuit 4 of FIG. 1 for performing the processing shown in FIGS. 4 to 10) for controlling the reproduction of a digital image signal or a digital audio signal by using a break of one continuous video image. And an output unit (for example, the video CD control circuit 4 of FIG. 1 for performing the processing shown in FIG. 12) for outputting a signal for displaying the current reproduction position in the inside.

A video CD reproducing apparatus according to a second aspect is
A superimposing means (for example, the audio / video driving circuit 9 in FIG. 1) for superimposing the video signal output from the first output means and the signal for displaying the current reproduction position within the division of the video output from the output means. It is characterized by further comprising.

A video CD reproducing apparatus according to a third aspect is
Decoding means (for example, the video CD processing circuit 7 in FIG. 1) that decodes the compression coded signal reproduced from the video CD and outputs a digital image signal and a digital audio signal, and playback control information reproduced from the video CD. Control means for controlling the reproduction of the digital image signal or the digital audio signal by using (for example, the video CD control circuit 4 of FIG. 1 for performing the processing shown in FIGS. 4 to 10), and the reproduction of the digital image signal or the digital audio signal. It is characterized by including a changing means (for example, the video CD control circuit 4 of FIG. 1 for performing the process W shown in FIG. 14) for arbitrarily changing the reproduction speed at the time.

FIG. 1 is a block diagram showing a configuration example of an embodiment of a video CD reproducing apparatus of the present invention.

A video CD control microcomputer 4 is incorporated in the video CD control circuit 4 which performs the main control of the video CD reproducing apparatus. This video CD
The control microcomputer is adapted to perform not only playback control processing but also main control processing of the video CD playback apparatus including control for displaying the playback position and control for changing the playback speed.

The key input signal corresponding to the key operation from the user output from the remote commander 11 is received by the TV microcomputer (microcomputer) 10,
Among them, the signals related to the video CD operation are I
The data is transmitted to the video CD control circuit 4 via the 2C bus (in-device serial bus). From the TV microcomputer 10 to the video CD control circuit 4, for example, a signal representing the numbers 1 to 99, a signal representing the NEXT key, a PREVIOUS
A signal representing a key, a signal representing a PAUSE key, a signal representing a PLAY key, a signal representing a RETURN (STOP) key, etc. are transmitted.

The video CD control circuit 4 is connected to the memory 5 having a capacity of 8 Kbytes. The memory 5 includes a video CD 1 (as in the conventional case, a CD-ROM-
When the video CD information as shown in FIG. 17 is recorded in conformity with the XA specification form) is inserted into the CD drive unit 2 which performs processing such as reproduction and stop,
The TOC information is read out and stored via a CD system controller (system controller) 3 for controlling the CD drive unit 2 and a video CD control circuit 4. TOC information (Table Of Conte
(nts: information about the start / end address of each track, information about the type of CD, etc.) is appropriately read from the memory 5 in response to a request from the video CD control circuit 4.

Further, the video CD control circuit 4 uses the video C
The reproduction start address of D1 and the information regarding the commands such as reproduction and stop are transmitted to the CD syscon 3.

The CD system controller 3 sends an interrupt signal to the video CD control circuit 4 at a constant cycle (for example, every 1/75 seconds).
The video CD control circuit 4 sends a specific control signal to the CD system controller 3 in response to the interrupt signal. Also, the video CD control circuit 4
When there is no control signal to send,
The dummy signal is transmitted to.

A handshake signal is transmitted and received between the video CD control circuit 4 and the CD system controller 3. Video CD control circuit 4 to CD system 3
PLAY instruction, STOP instruction, PAUS from a specific address
A PLAY command for E and a TOC information request command are transmitted, and the CD system controller 3 sends to the video CD control circuit 4 an ACK (acknowledge) signal, a NAK (non-acknowledge) signal for the command, and processing result information for the command. It is designed to be sent.

Further, the video CD control circuit 4 is adapted to transmit the information regarding the reproduction start / end address and the decode type of the video CD 1 to the video CD processing circuit 7 for MPEG decoding via the bus.

Further, the video CD control circuit 4 displays O on the screen.
Audio / video drive circuit 9 for processing the output signal of the control signal for SD display according to the interface of the CRT 12.
It is designed to be sent to.

The video CD processing circuit 7 interrupts the video CD control circuit 4 when the decoding processing up to the designated address is completed during the MPEG decoding processing or when the AUTO PAUSE flag or the like is detected from the reproduced data. It is designed to send signals.

The DRAM 8 having a capacity of 4 Mbits stores the playback control information reproduced from the video CD 1 through the video CD processing circuit 7, and the playback control information is copied to the memory 5 as appropriate. It is done like this.

The CD syscon 3 is a video CD control circuit 4
When receiving the CD reproduction control signal from the CD drive unit 2, the CD drive unit 2 is made to perform the reproduction process from the designated address in accordance with the reproduction control signal. When the inserted CD is a CD-G (CD-Grafic), the signal reproduced by the CD drive unit 2 is transmitted to the CD-G processing circuit 6 which decodes the CD-G signal and inserted. When the CD is a video CD, it is transmitted to the video CD processing circuit 7 which performs MPEG decoding processing.

During reproduction of the CD, sub-coding Q channel data (SUB-Q data) indicating the address of the reproduction frame is transmitted from the CD drive unit 2 to the video CD processing circuit 7, and the video CD control circuit 4 is Video C
This SUB-Q data is received via the D processing circuit 7 and the current reproduction position is recognized.

The video CD processing circuit 7 is adapted to perform MPEG decoding processing on the video / audio signal transmitted from the CD drive section 2 and transmit it to the audio / video drive circuit 9. The signal decoded by the video CD processing circuit 7 is
The audio / video drive circuit 9 converts the audio signal into a digital / analog signal, converts the video signal into an analog video signal of NTSC system, and outputs the analog video signal to the speaker 13 and the CRT 12, respectively.

The audio / video drive circuit 9 is a CD-G.
Similarly, with respect to the decoded video / audio signal transmitted from the processing circuit 6, the audio signal is digital / analog converted, and the video signal is converted into an analog video signal of NTSC system. This audio / video drive circuit 9
Then, the video CD processing circuit 7 or the CD-G processing circuit 6
From the video CD control circuit 4 or the TV microcomputer 10 and superimposes it on the CRT 12 as a video signal.

In this example, the OSD display signal related to the video CD is sent from the video CD control circuit 4 to the audio / video drive circuit 9.
However, the command for OSD display related to the video CD is transmitted from the video CD control circuit 4 to the TV microcomputer 10 via the I2C bus, and the OSD is transmitted to the TV microcomputer 10.
A display signal may be generated and transmitted to the audio / video drive circuit 9.

From the TV microcomputer 10 to video CD related O
The advantage of configuring the video CD control circuit 4 to transmit the signal for OSD display without transmitting the SD display signal is that when the video CD processing circuit 7 has a function for OSD display in the future, This means that the design change of the TV section (TV microcomputer 10) is not required by simply replacing the CD control circuit 4 with a cheaper circuit (a circuit having no OSD display function). Also, the video CD section (CD drive section 2, C
D system controller 3, video CD control circuit 4, memory 5, CD
-G processing circuit 6, video CD processing circuit 7, DRAM 8)
There is also an advantage that the same TV unit (TV microcomputer 10) can be used for a television receiver having a built-in television and a television receiver having no built-in television.

OSD from TV microcomputer 10 for TV image
When the display is superimposed, the TV image is output from the tuner or the like (not shown) to the CRT 12 through the audio / video drive circuit 9, and the TV microcomputer 10 causes the OSD synchronized with the TV image via the audio / video drive circuit 9. The signal is transmitted to the CRT 12.

FIG. 2 shows the video CD control circuit 4 shown in FIG.
3 is a block diagram of the processing functions of the video CD control microcomputer in FIG.

As shown in FIG. 2, the processing block of the video CD control microcomputer is a system controller I / F unit 2
1, a reception processing unit 22, a video CD communication unit 23, a memory control unit 24, a key input processing unit 25, a main processing unit 26, and an OSD processing unit 27.

A key input signal from the remote commander 11 by a user's key operation is processed by the reception processing unit 22 via the TV microcomputer 10. Numbers 1 to 9, NEXT key, PREVIOUS key, RE
The key input signals of the TURN (STOP) key, the DEFAULT key, etc. are converted into corresponding 1-byte codes, and the key input processing unit 25 discriminates the type of the input key.

The video CD communication section 23 receives the reproduction (decoding) start address information, end address information, decode type information, etc. of the video CD to be transmitted to the video CD processing circuit 7 and the video CD processing circuit 7 and the video CD control circuit. Processing is performed according to the four interfaces.

The ciscon I / F section 21 is a CD ciscon 3
The reproduction start address information, end address information, and control information such as reproduction and stop of the video CD to be transmitted to the CD.
Processing is performed according to the interface between the system controller 3 and the video CD control circuit 4.

The OSD processing section 27 transfers the OSD display information to be transmitted to the audio / video driving circuit 9 to the audio / video driving circuit 9.
And the video CD control circuit 4 interface.

The memory control section 24 is adapted to read the playback control information accumulated in the memory 5 into the video CD control circuit 4 as appropriate.

The main processing section 26 is adapted to carry out main control for appropriately giving control to the above processing. In addition to this main control, control for displaying the playback position (described later using the flowchart of FIG. 12) and control for changing playback speed (described later using the flowchart of FIG. 14), etc. Is designed to do.

Next, the operation of the above embodiment will be described. First, the process of reading the playback control information stored in the video CD 1 will be described with reference to the flowchart of FIG.

When the video CD 1 is inserted into the CD drive unit 2 shown in FIG. 1 in step S1, C is inserted in step S2.
The D system controller 3 reads the TOC information from the video CD 1.

In step S3, the video CD control circuit 4
The main processing unit 26 requests the TOC information from the CD system controller 3 via the system controller I / F unit 21. The TOC information is stored in the memory 5 via the system controller I / F unit 21, the main processing unit 26, and the memory control unit 24.

At this time, the main processing section 26 determines that the inserted CD
Identify the type of. Check the PSEC value of the address represented by A0H in the TOC information, and if the value is 20H, CD-R
It is OM-XA (video CD), and if it is 00H, it is widely used as a music CD.
, Or a CD-G in which a simple still image is recorded in an unused area of a music CD. If the inserted CD is a music CD or a CD-G, it is further determined whether the inserted CD is a music CD or CD-G, the track information is displayed, and a key input from the user is awaited.

When the inserted CD is a video CD, in step S4, the main processing unit 26 causes the syscon I / F unit 21 to operate.
Playback control information to the CD syscon 3 via
A playback command for the video CD information section including PSD.VCD is transmitted. In step S5, the CD syscon 3 transmits a reproduction command to the CD drive unit 2 in response to this command,
Let the playback run. The reproduction data is supplied from the CD drive unit 2 to the video CD processing circuit 7, and the CD-ROM-X
The data is read by the A format data reading function (data capture function) and stored in the DRAM 8.

At step S6, the main processing section 26
The video CD processing circuit 7 is controlled via the video CD communication unit 23 to read the playback control information from the DRAM 8 and store it in the memory 5. Thus, in addition to TOC information, INFO.VCD, ENTRIES.VCD, LO is stored in the memory 5.
Playback control information such as T.VCD and PSD.VCD (Fig. 1
7) is accumulated.

In this way, the video CD is reproduced on the basis of the read playback control information.

Incidentally, in response to the processing of the playback control information, for example, when processing the playlist of the list ID 1, the binary data (2 bytes) of the area in which the list ID number is recorded is read and The values of BIT0 to BIT14 are checked as the list ID number, it is confirmed that the list ID is 1, and PLAY ITEM # 1 is executed. At this time, if the highest BIT (BIT15) of the area in which the list ID number is recorded is 1, this playlist is not registered in the table data of the LOT file. Therefore, memorize the number of ITEM in the playlist, and after executing PLAY ITEM # 1, NEXT, RETURN, PR
If it is necessary to move to a new list process in response to the user's key input such as EVIOUS, move to that process.

In the case of processing the selection list of list ID1, the same confirmation processing of the list ID number as in the case of the playlist is performed, and the value of DEFAULT LIST OFFSET in this list must be FFFDH or FFFFH. If (if not multi-selection), PLAY ITEM # 1 is executed as in the case of the playlist.

INFO.VCD (in a sector starting at 00:04:00) NUMBER OF VOLUMES IN ALUBUM describes the total number of disks (VOLUME) constituting the ALUBUM.
When the sequence of video and audio can fit on one video CD (when it is not continuous processing from the previous disc)
Confirms the PSD size specified in INFO.VCD. If the PSD size is not 0, playback control data exists on that disc, so the list of list ID 1 (PSD starting from 00:04:34 The process starts from the first selection list (header data = 18H) or play list (header data = 10H)) of the first sector of .VCD.
If the PSD size is 0, there is no playback control information on the disc, and therefore reproduction is started from the track 2 of the video CD.

In a multi-disc album in which the sequence of video and audio continues to the previous video CD, STATUS FLA represented by the 44-byte position of INFO.VCD of the previous disc.
BIT5 or BIT6 of G is set to 1 (a flag that indicates continuation) (if it is not a continuation process from the previous disk, this BIT5 and B of the previous disk).
(IT6 are all 0), this BIT5 has meaning when PSD exists in the next disk, and this BIT6 has meaning when PSD does not exist in the next disk.

The flag set in this BIT5 compares the album ID of the next disc (ALUBUM ID indicated by the position of 11 to 26 bytes in INFO.VCD) with the album ID of this disc (previous disc). If they are the same, the process starts from the list ID 2 of the next disc, and if they are different, it means that the process starts from the list ID 1 of the next disc.

The flag set in this BIT6 compares the album ID of the next disc with the album ID of this disc (previous disc). If both are the same, the track 3 of the next disc is selected. Start playing,
If they are different, it means that the reproduction is started from the track 2 of the next disc.

PSD for a multi-disc album in which the audiovisual sequence continues to the previous video CD.
Check the size, if the PSD size is not 0, the album ID is the same as the previous disc and the VO in the album
The ALBUM SET SEQUENCE NO. (Value represented by the 29th and 30th bytes of INFO.VCD) indicating the LUME number is 2 or more, and the BIT 5 of the STATUS FLAG of the previous disk is 1
If it is confirmed that, the process is started from the list of list ID2.

If the PSD size is 0, the album ID
Is the same as the previous disc, and ALBUM SET SEQUENCE NO.
Is 2 or more, and if it is confirmed that the BIT 6 of the STATUS FLAG of the previous disc is 1, the reproduction is started from the track 3 of the video CD.

Next, the playback control process of the video CD control circuit 4 will be described with reference to the flowcharts of FIGS.

The video CD control circuit 4 appropriately processes the main control routine when interrupt processing occurs.

When a key input signal is transmitted to the video CD control circuit 4 shown in FIG. 1 through the TV microcomputer 10 by operating the remote commander 11 by the user, the video C
An input key signal reception interrupt from the remote commander 11 shown in FIG. 4 is generated in the D control circuit 4.

Main processing unit 26 of video CD control circuit 4
Receives an input key signal via the TV microcomputer 10, the reception processing unit 22, and the key input processing unit 25, the step S
At 100, key processing according to the input key signal is performed.
This key processing is processing other than processing based on playback control information (for example, skip processing for performing high-speed playback, one-step processing, slow-motion processing, reverse skip processing for performing high-speed reverse playback, playback processing from a specific list, identification Movie reproduction processing from a track, reproduction processing from a specific entry point, and the like). To change the playback speed, use the key processing shown in step S100
It corresponds by changing the skip width of the playback address. The details of the process of changing the reproduction speed will be described later with reference to the flowchart of FIG.

Next, the main processing section 26 carries out step S1.
In the subroutine shown by 10, the memory control unit 24
On the basis of the playback control information acquired via the, the list in the playback control information to be reproduced next, which corresponds to the input key signal, is determined. The details of the processing in step S110 will be described later with reference to FIG.

When the list in the playback control information is determined, the main processing unit 26, in the subroutine shown in step S120, sets the play item information shown in the list by the track number, second, and frame number on the video CD. It is converted into the reproduction start address information and the reproduction end address information shown. In addition, the main processing unit 26
The PEG decode type is determined from the target track information acquired via the memory control unit 24. The details of the processing in step S120 will be described later with reference to FIG.

Next, the main processing section 26 proceeds to step S13.
At 0, the address information and the MPEG decode type information determined in step S120 are transmitted to the video CD processing circuit 7 via the video CD communication section 23, and the address information, control signals for reproduction, stop, etc. It is transmitted to the CD syscon 3 via the unit 21.

The CD syscon controls the CD drive section 2 in response to this control signal to reproduce the video CD. The reproduction signal is processed by the video CD processing circuit 7, and is output from the CRT 12 and the speaker 13 via the audio / video driving circuit 9.

When the above interrupt processing is completed, the control is returned to the main control routine of the video CD control circuit 4.

For example, it is assumed that the user does not perform a key operation during the time-out time designated in the selection list in the playback control information during the reproduction of the menu still image in the processing of the main control routine. At this time, when the time-out time has elapsed, the time-out interrupt shown in FIG. 5 is generated from the OS of the video CD control microcomputer to the main processing routine of the video CD control microcomputer.

Main processing unit 26 of video CD control circuit 4
When a timeout interrupt occurs, the step S2
At 00, the timeout list specified in the selection list is specified as the list to be processed next.

Next, the main processing section 26 causes the step S210.
In the play item address information and MPE
Determine G decode type information. Step S210
The process of is a process similar to the process of step S120 of FIG.

Next, the main processing section 26 proceeds to step S22.
0, the address information and the MPEG decode type information are transmitted to the video CD processing circuit 7 via the video CD communication section 23, and the address information, the play / stop command are transmitted to the CD syscon 3 via the syscon I / F section 21. To do.
The CD syscon 3 executes the process corresponding to this control as in the case described above. The process of step S220 is similar to the process of step S130 of FIG.

Interrupt signals are periodically transmitted from the CD system controller 3 to the video CD control circuit 4. In this case, the video CD control circuit 4 executes the process corresponding to the interrupt signal from the CD system controller 3 shown in FIG.

In response to the interrupt signal from the CD syscon 3 transmitted via the syscon I / F section 21, the video C
The main processing unit 26 of the D control circuit 4 performs step S300.
Then, it is determined whether or not there is a control signal to be transmitted to the CD syscon 3, and if there is a control signal to be transmitted, step S3
A control signal for reproduction, stop, etc. at 20 is sent to the system control I / F unit 21
To CD Syscon 3 via. When there is no control signal to be transmitted to the CD syscon 3, the main processing unit 26
Transmits a dummy signal to the CD syscon 3 via the syscon I / F unit 21 in step S310.

When the OSD display of a plurality of lines is performed, when the display for one line is completed, the audio / video drive circuit 9 outputs the O signal.
OS to the video CD control circuit 4 via the SD processing unit 27
A D interrupt occurs, and at this time the video CD control circuit 4
Executes the processing shown in FIG.

In response to the OSD interrupt signal from the audio / video drive circuit 9 transmitted via the OSD processing section 27,
The main processing unit 26 of the video CD control circuit 4 moves to the display buffer (not shown) which stores the OSD display data of the next row in step S350, and in step S360, the OSD
The display signal is transmitted to the audio / video drive circuit 9 via the OSD processing unit 27. The audio / video drive circuit 9 uses this ODS
The display signal is superimposed on the video signal and output to the CRT 12 for display.

It is assumed that the AUTO PAUSE state occurs during the reproduction of the video CD. In this case, the video CD processing circuit 7
This is a case where a flag indicating AUTO PAUSE is detected in the video CD reproduction signal from the drive unit 2, and at this time, the video C
The D control circuit 4 executes the processing shown in FIG. 8 in response to the interrupt from the video CD processing circuit 7.

In step S400 of FIG. 8, when the main processing section 26 of the video CD control circuit 4 determines that the AUTO PAUSE interrupt has occurred from the video CD processing circuit 7, the main processing section 26 with respect to the CD system controller 3 in step S401.
Set the AUTO PAUSE command and AU in step S402.
The TO PAUSE control signal is sent to the CD via the syscon I / F unit 21.
Send to Syscon 3. The CD syscon 3 executes the pose control in response to this.

Next, in step S403, the main processing portion 26 waits for the reception of the input key signal for the time designated by the AUTO PAUSE waiting time in the playlist.

If the input key signal is not received within the designated time, the main processing section 26 proceeds to step S404.
In step S405, the AUTO PAUSE release command is set to the CD system controller 3 and the AUTO PAUSE release control signal is sent via the system controller I / F unit 21 in step S405.
Send to.

In step S403, when the input key signal is received within the designated time, the above-mentioned input key signal reception interrupt from the remote commander 11 occurs,
The processing shown in FIG. 4 is executed.

When the decoding process up to the designated address is completed, the video CD processing circuit 7 sends a reproduction end interrupt signal to the video CD control circuit 4.

When it is determined in step S400 in FIG. 8 that the interrupt from the video CD processing circuit 7 is not the AUTO PAUSE interrupt, the main processing section 26 further ends the reproduction from the video CD processing circuit 7 in step S410. Determine if an interrupt has occurred. Main processing unit 26
When it is determined that the reproduction end interrupt has occurred, in step S411, it is determined whether the completed decoding process is a selection list or a play list.

If the main processing section 26 determines that the decoding processing that has ended is the selection list, then in step S412, the main processing section 26 waits for the input key signal to be received for the timeout time designated in the selection list.

In step S412, when the input key signal is received within the designated time, the above-mentioned input key signal reception interrupt from the remote commander 11 is generated (the processing of FIG. 4 is executed), and the designation is performed. If the input key signal is not received within the specified time-out period, the above-mentioned time-out interrupt occurs (the process of FIG. 5 is executed).

Returning to step S411, the main processing section 2
When it is determined that the completed decoding process is a playlist, the process 6 further determines in step S430 whether or not the play item waiting time is designated in the playlist.

When it is determined in step S430 that the play item waiting time is designated, the main processing section 26 waits for the input key signal to be received during the designated play item waiting time in step S441. When the input key signal is received during the designated play item waiting time, the input key signal reception interrupt from the remote commander 11 described above is generated.

When the input key signal is not received within the designated play item waiting time and when the play item waiting time is not designated, the main processing section 2
6 determines whether or not there is a NEXT list in step S431.

If there is a NEXT list, the main processing unit 2
6 is the NE as the list to be processed next in step S442.
Select the XT list. Next, in step S443, the address information of the play item and the MPEG decode type information are determined, and in step 444, the address information and the MPEG decode type information determined in step S443 are video CD processed via the video CD communication unit 23. It is transmitted to the circuit 7, and the address information and the reproduction command are transmitted to the CD syscon 3 via the syscon I / F unit 21.

The processing of step 443 is the same as the processing of step S120 of FIG. 4 and step S210 of FIG.

If it is determined in step S431 that there is no NEXT list, the main processing section 26 determines in step S4.
In 32, a reproduction stop command for the CD syscon 3 is set, and in step S433, a reproduction stop signal is transmitted to the CD syscon 3 via the syscon I / F unit 21.

FIG. 9 is a flowchart showing details of the subroutine processing shown in step S110 of FIG. This process is a process in which the main processing unit 26 of the video CD processing circuit 4 selects a list in the playback control information to be performed next by the input key.

The main processing section 26 determines the list to be selected, depending on whether the timing at which the input key signal is received is the play list execution time or the selection list execution time.

If the timing at which the input key signal is received is when the play list is executed, the main processing portion 26 determines in step S1100 whether the input key signal is the PREVIOUS key, and the key is the PREVIOUS key. If determined, the PREVIOUS list designated in the list is selected in step S1103. Also, when the list used for playback control is selected, control is returned to the caller.

If the main processing unit 26 determines in step S1100 that the input key signal is not the PREVIOUS key, it is further determined in step S1101 whether the input key signal is the NEXT key, and the NEXT key is pressed. If it is determined that there is one, the NEXT list specified in the list is selected in step S1104.

If the main processing unit 26 determines in step S1101 that the input key signal is not the NEXT key, it is further determined in step S1102 whether the input key signal is the RETURN (STOP) key, RETURN
If it is determined that the key is a key, the RETURN list specified in the list is selected in step S1105.

If the main processing section 26 determines in step S1102 that the input key signal is not the RETURN (STOP) key, then in step S1106, error processing corresponding to the illegal input key signal is executed.

If the timing at which the input key signal is received is when the selection list is executed, the main processing section 26 determines in step S1120 that the input key signal is PREV.
If it is determined that it is the IOUS key, and if it is determined that it is the PREVIOUS key, then in step S1125 the PREVIOUS list specified in the list is selected.

If the main processing unit 26 determines in step S1120 that the input key signal is not the PREVIOUS key, it is further determined in step S1121 whether the input key signal is the NEXT key, and the NEXT key is pressed. If it is determined that there is one, the NEXT list specified in the list is selected in step S1126.

When the main processing section 26 determines in step S1121 that the input key signal is not the NEXT key, it further determines in step S1122 whether the input key signal is the RETURN (STOP) key, RETURN
If it is determined that the key is the key, the RETURN list specified in the list is selected in step S1127.

If the main processing section 26 determines in step S1122 that the input key signal is not the RETURN (STOP) key, then in step S1123,
Determine whether the input key signal is the DEFAULT key,
If it is determined that the key is the AULT key, step S1128
Use to select the DEFAULT list specified in the list.

If the main processing section 26 determines in step S1123 that the input key signal is not the DEFAULT key, it further determines in step S1124 whether the input key signals are the ten-key and the enter key, and the input key signal is input. If it is determined that the signal is the numeric keypad and the enter key, in step S1129, the selection list corresponding to the input key designated in the list is selected.

If the main processing section 26 determines in step S1124 that the input key signal is not the ten-key or the enter key, then in step S1130, error processing corresponding to the illegal input key signal is executed.

Details of the subroutine processing shown in step S120 of FIG. 4, step S210 of FIG. 5, and step S443 of FIG. 8 will be described with reference to the flowchart of FIG.

The processing of the flowchart shown in FIG.
This is a process of determining the reproduction start address information, the end address information, and the MPEG decoding type information of the play item designated in the list of the selected playback control information.

In step S1200, it is determined whether the address information of the play item is 0 or 1. When it is determined that the address information of the play item is 0 or 1, (track 0 is the lead-in area,
Since Track 1 is the Video CD Information area), no processing is done and control is returned to the caller.

If it is determined in step S1200 that the address information of the play item is not 0 or 1, it is further determined in step S1201 whether the address information of the play item is 2 to 99. It If it is determined that the address information of the play item is 2 to 99 (because normal video / audio data is recorded in tracks 2 to 99), in step S1206, SI in INFO.VCD is written.
The playback mode (decode type) is set by the SETSTREAM () command based on the NTSC / PAL information of the track represented by the same number as the address information of the play item, which is defined by the ZE MAP OF TRACK MOTION PICTURE information. Next, in step S1207, the start address and end address of the track represented by the same number as the address information of the play item are calculated from the TOC information.

When it is determined in step S1201 that the playitem address information is not 2 to 99, it is further determined in step S1202 whether the playitem address information is 100 to 599. The play item address information is 10
If it is determined to be 0 to 599 (to specify the reproduction address from the middle position of the track), in step S1205, the number obtained by subtracting 99 from the play item address information (entry specified in ENTRY.VCD Is calculated.

Next, in step S1210, INF
The NTS of the track represented by the entry specified by the SIZE MAP OF TRACK MOTION PICTURE information in O.VCD.
The playback mode (decode type) is set by the SETSTREAM () command based on the C / PAL information. next,
In step S1211, the start address and end address in the track represented by the entry are calculated from the TOC information.

When it is determined in step S1202 that the playitem address information is not 100 to 599, further, in step S1203, the playitem address information is 1000 to 2
979 is determined. If it is determined that the playitem address information is 1000 to 2979 (to specify the segment video for which midway playback can be specified in playback control), in step S1208, 999 is subtracted from the playitem address information. Calculate the number that represents the segment play item number.

Next, the main processing section 26 proceeds to step S1.
209. SEGMENT PLAY ITEM CONT in INFO.VCD
The type of MPEG data is determined from the content data (1 byte) of the segment play item of ENTS TABLE, and the decode type is set by the SETSTREAM () command. For the start address of the segment play item, multiply the number obtained by subtracting 999 from the play item address information by 150 and multiply this value by FIRST SEGMENT ADDR.
ESS (BC in BYTE POSITION 49 to 51 in INFO.VCD
(Existing in D form) is added.

Further, the segment play item is B in the segment play item content data.
It starts from the place where IT5 is 0 (meaning that the target segment is 150 sectors per unit), goes through the place where BIT5 is 1 (means that the target segment is continuous for multiple units), and then BIT5 Occupies up to the point where is zero. By this, the end address of the segment play item is calculated.

When it is determined in step S1203 that the address information of the play item is not 1000 to 2979, the main processing section 26 proceeds to step S1203.
At 1204, error processing corresponding to the illegal input key signal is executed.

Incidentally, steps S1207 and S1
In step 209 and step S1211, the reproduction end addresses of the track and segment play item are
If the value of PLAYING TIME in the list is 0, it will be the same address as the end address of the track and segment play item, and if the value of PLAYING TIME in the list is 1 or more, it will be indicated by multiplying that number by 5. The start sector address is added to the offset occupied by the number of sectors.

FIG. 11 is a flowchart showing the processing of the video CD processing circuit 7 for the control signal from the video CD processing circuit 4. Further, from the video CD processing circuit 4, in addition to the control signal for designating the decode address and the decode type, a signal for requesting SUB-Q data is transmitted at a constant cycle. In response to this request signal, the video CD processing circuit 7 sends the SUB-Q data sent from the CD drive section to the video CD control circuit 4.

When the control signal reception interrupt from the video CD processing circuit 4 occurs, the video CD processing circuit 7 operates as shown in FIG.
The process indicated by 1 is executed.

When the control signal requesting the current reproduction address information is transmitted from the video CD control circuit 4, the video CD processing circuit 7 is operated at step S510 shown in FIG.
Extracts the SUB-Q data from the reproduction data transmitted from the video CD 1 via the CD drive unit 2,
-Send the Q data to the video CD control circuit 4.

With this SUB-Q data, a video CD
The control circuit 4 (main processing unit 26) recognizes the current reproduction address and outputs an OSD signal for displaying the reproduction position (described later with reference to the flowchart of FIG. 12).

When the control signal for instructing the decoding from the designated address is transmitted from the video CD control circuit 4, in step S520, the video CD processing circuit 7 outputs the C signal.
MPEG decoding processing is performed on the MPEG encoded video and audio signal transmitted from the D drive unit 2 in accordance with a control signal from the video CD processing circuit 4.

At step S 530, the video CD processing circuit 7 sends AUTO P to the signal transmitted from the CD drive section 2.
It is determined whether or not the flag indicating AUSE is set, and if the flag is set, step S54
At 0, an AUTO PAUSE interrupt signal is transmitted to the video CD processing circuit 4. On the other hand, the video CD processing circuit 4 executes the processing of steps S400 to S405 of FIG.

When the video CD processing circuit 7 determines in step S530 that the flag is not set in the signal to be transmitted, it is further specified in step S550 by the control signal from the video CD processing circuit 4. It is determined whether or not the decoding process has been completed up to the final address of the MPEG decoding process, and if it is determined that the decoding process has been completed, a reproduction end interrupt signal is transmitted to the video CD processing circuit 4 in step S560. On the other hand, the video CD processing circuit 4 executes the processing of steps S410, S411, S412, etc. of FIG.

When the video CD processing circuit 4 determines in step S550 that the decoding process has not been completed up to the designated address, the process returns to step S520 and the subsequent processes are repeatedly executed.

As described above, the video CD control circuit 4
Is designed to perform playback control.

Next, the control processing for displaying the current reproduction position in the sequence, which is performed by the video CD control circuit 4, will be described with reference to the flowchart of FIG.

When the user instructs normal reproduction, skip reproduction, and their reverse reproduction of the video CD, the video C
The microcomputer of the D control circuit 4 is shown in FIGS.
In addition to the normal playback control process shown by 0, the process shown in FIG. 12 is performed.

In step S100, the main processing unit 26 of the video CD control circuit 4 reproduces a normal video (video after track 2) of one sequence (a continuous break of a moving picture). Or the segment video recorded on track 1 is determined. When it is determined that the reproduced video is a normal video of one sequence, the TOC information stored in the memory 5 is set to the start address and end address of the video on the target track via the memory control unit 24 in step S101. Get more.

When the main processing unit 26 determines that the video to be reproduced is the segment video recorded on the track 1, the main control unit 26 determines the start address and end address of the target segment in the memory control unit 24 in step S102. Via the playback control information stored in the memory 5.

Subsequently, in step S103, the main processing unit 26 transmits, via the video CD communication unit 23, a command requesting the address information being reproduced to the video CD processing circuit 7, and its response data (SUB-Q). Data) is a video CD
It is transmitted from the processing circuit 7 to the main processing unit via the video CD communication unit 23 (processing of step S510 in FIG. 11).

Step S101 or step S
On the basis of the start address and end address acquired in step 102 and the current reproduction address acquired in step S103, the main processing unit 26 determines in step S104 the reproduction position ((( The position represented by the current reproduction address-start address) / (end address-start address) is calculated.

In order to display the reproduction position on the icon calculated in step S104 above on the video screen in a superimposed manner, the main processing unit 26 sends the OSD signal via the OSD processing unit 27 in step S105. Is transmitted to the audio / video drive circuit 9. At this time, the audio / video driving circuit 9 outputs the signal representing the latest reproduction position and the video C.
The video signal reproduced from D1 is superimposed and output to the CRT 12 as shown in FIG.

When the OSD display signal is transmitted to the audio / video drive circuit 9, in step S106, a waiting state is maintained for a certain period (for example, 0.5 seconds). Then, after a lapse of a certain period of time, in the subsequent step S107, it is determined whether or not the reproduction is completed. If it is determined that the reproduction process is not completed, the process returns to step S103 again, and the subsequent process is repeated. Done. When it is determined in step S107 that the reproduction is completed, the control is returned to the main control routine of the video CD control circuit 4.

In this way, the reproduction position is calculated at regular intervals, and the reproduction position is changed to CRT1 by superimposing.
2 is displayed on the screen.

FIG. 13 shows an example of icon display showing the reproduction position in the sequence, which is displayed on the CRT 12 by the processing of the flowchart of FIG.

In this figure, the sequence start address of the video / audio being reproduced is represented by the position D1, and the sequence end address of the video / audio being reproduced is represented by the position D3. The position between D1 and D3 is D1
Means an address position in this sequence that increases at a constant rate as it progresses from D to D3. The address being reproduced (current reproduction position) is represented by D2, and as the forward reproduction is performed, D2 moves in the direction of D3.
When the reverse reproduction is performed, D2 moves in the direction of D1.

In the icon indicating the reproduction position in this sequence, the length in the horizontal direction is proportional to the video / audio amount (reproduction time) in this sequence.
Length from D1 to D2 (or,
By recognizing the length from D2 to D3 with respect to the length from D1 to D3, it is possible to visually and instantly grasp the video / audio amount (reproduction time) of the reproduction end portion (or reproduction end portion). You can

Further, by comparing the moving speed of D2 and the change in the video image, the video / audio amount (reproduction time) of the entire sequence being reproduced can be intuitively grasped.

Further, although not shown in the figure, from the position of D1 to the position of D2 is blue, and from the position of D2 to D.
The position up to 3 is displayed in white, and the right arrow is displayed at the position of D2 during forward playback, and the entire icon indicating the playback position in the sequence is surrounded by a yellow frame for a more visually appealing display. You can also do it.

Further, the positions represented by D1, D2, and D3 mean video addresses in addition to the in-sequence addresses.
The main processing unit 26 of the D control circuit 4 grasps the reproduction start time of the sequence, the current reproduction time of the sequence, and the reproduction end time of the sequence. The position of D1 indicates the reproduction start time of the sequence, and the position of D2 indicates the reproduction start time of the sequence. The position may represent the current playback time of the sequence, and the position of D3 may represent the playback end time of the sequence.

Further, it is also possible to display the position of the track being reproduced within the entire video CD and the position of the reproduction position within the entire video CD.

These position displays can be displayed on the image by OSD, or can be performed by a dedicated display unit such as an LCD display unit or a horizontal band display unit.

In this way, it is possible to visually provide the user with position information indicating where the current reproduction position is located in the sequence.

Next, the control processing performed by the video CD control circuit 4 for arbitrarily changing the reproduction speed during skip reproduction in response to a request signal from the user will be described with reference to FIG.
This will be described with reference to the flowchart of FIG.

When the user instructs skip reproduction of the video CD and reverse skip reproduction thereof, the microcomputer of the video CD control circuit 4 performs the processing shown in the example of FIG.

First, when the user performs skip reproduction, in step S200, I (I) which is the first image of a predetermined GOP (Group Of Pictures) as a reproduction address.
ntra-coded) The address of the picture is specified. next,
In step S201, the main processing unit 26 of the video CD control circuit 4 issues a command signal for decoding and reproducing only the designated I picture and setting the post-reproduction decoding process to the stop mode via the video CD communication unit 23. A control signal that is transmitted to the processing circuit 7 and causes the reproduction from the designated address is transmitted to the CD syscon 3 via the syscon I / F unit 21.

Subsequently, when the video of the designated I picture is reproduced, the decoding process in the video CD processing circuit 7 is stopped in step S202, and the decoding process is started from the video CD processing circuit 7 to the video CD control circuit 4. An interrupt signal indicating the end is transmitted to the video CD control circuit 4. At this time, the main processing unit 26 sends the address information, whose decoding process has been stopped, via the video CD communication unit 23.
It is acquired by the value of the register in the video CD processing circuit 7.

In step S203, it is determined whether or not the skip reproduction end instruction signal is received from the user. If it is determined that the skip reproduction end instruction signal is received, the processing of FIG. 14 is ended, and the control is video. The process is returned to the main control routine of the CD control circuit 4. If the skip reproduction end command signal from the user is not received, the process proceeds to the subsequent step.

At this time, when the user inputs a signal for changing the reproduction speed of skip reproduction, the processing of step S205 described later is executed and the reproduction speed of skip reproduction is changed.

As an input operation example for the user to input this signal, an operation example using the user operation panel is shown in FIG.
A description will be given with reference to the operation panel shown in FIG.

As shown in this example, a VR (volume) 30 (for example, a Sony (trademark) VTR) for changing the reproduction speed is provided on the video CD operation panel along with buttons for realizing other user key inputs. The VR for high-speed playback speed adjustment that is used has a jog shuttle key) that can be operated to change the playback speed according to the rotation angle. In this figure, E1 for rewinding is the PREVIOUS button, E2 for PAUSE playback is the PAUSE button, E3 for normal playback is the PLAY button, and E4 for fast forward is NEXT.
The button E5 for stopping is a STOP button.

The user sets this VR 30 to the right (or left).
When rotated to, the playback speed increases (or decreases) in proportion to the rotated angle, and when the user releases the VR 30, the VR 30 returns to the original position and the playback speed also returns to the normal speed. .

As another example of the user's input operation,
A user key operation from the remote commander 11 (for example,
It is also possible that the TV microcomputer 10 receives an infrared signal, which is transmitted by pressing the NEXT key a plurality of times in succession) and which means that the skip reproduction speed is changed.

At step S204, an input signal for changing the reproduction speed of such skip reproduction is sent to the main processing unit 2 via the reception processing unit 22 and the key input processing unit 25.
It is determined whether or not the data has been received at 6.

If it is determined in step S204 that the signal for changing the skip reproduction speed is received from the user, the main processing unit 26 calculates the address of the image to be reproduced next in step S205. Value (for example, the value that specifies the I picture after 5 seconds in the playback time, the skip width in normal skip playback)
By adding a certain value (for example, a value designating an I-picture after 1 second from the reproduction time), the address of the image to be reproduced next is further increased by a certain value from the added value. If it is determined in step S204 that the signal for changing the reproduction speed has not been received from the user, the subsequent process is performed without changing the addition value.

Subsequently, in step S206, the main processing section 26 adds the decoding end address of the previous image recognized in step S202 to this added value, and specifies the address of the image to be reproduced next. This address is an address increased by the addition value from the image address reproduced immediately before, and if the process of step S205 is not performed and the addition value is constant, the address of the image to be reproduced next with a constant skip width However, if the addition value changes as a result of the processing of step S205 being performed, the address of the image to be reproduced next is specified with the changed skip width.

Since the I picture does not always appear exactly in the cycle corresponding to the added value, in this case, the I picture immediately after (or just before) the added value is designated.

Then, returning to step S202, the subsequent processing is repeatedly executed.

In step S205, if the constant value added to the addition value is positive, the reproduction speed increases in the forward direction, and if the constant value added to the addition value is negative, the reproduction speed increases in the reverse direction. Become. At this time, in the case of reverse playback,
The added value is also negative.

In the processing example of FIG. 14, the increment to be added to the addition value is set to a constant value, but it is needless to say that the increment to be added to the addition value can be changed depending on the key input time from the user.

In this way, since the reproduction speed can be changed by the user's operation, it is possible to search for a specific video faster, or to reproduce only a specific video at a slower speed.

In addition to the above embodiments, the present invention can be modified in various ways.

[0190]

A video CD reproducing apparatus according to claim 1,
According to the video CD reproducing method of claim 4,
Since the signal for displaying the current reproduction position within the division of one continuous video image is output, the reproduction position during reproduction can be grasped.

According to the video CD reproducing apparatus of the third aspect and the video CD reproducing method of the fifth aspect, since the reproducing speed is arbitrarily changed, it is possible to search the target video earlier. it can.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a video CD reproducing apparatus of the present invention.

2 is a functional block diagram showing processing contents of a video CD control circuit 4 of FIG. 1. FIG.

FIG. 3 is a flowchart illustrating a process of reading playback control information.

FIG. 4 is a flowchart illustrating interrupt processing from the TV microcomputer 10 that is generated in the video CD control circuit 4 of FIG.

5 is a flowchart illustrating a timeout interrupt process that occurs in the video CD control circuit 4 of FIG.

FIG. 6 is a flowchart illustrating an interrupt process from the CD syscon 3 that is generated in the video CD control circuit 4 of FIG.

7 is a diagram showing audio / voice generated in the video CD control circuit 4 of FIG.
9 is a flowchart illustrating an interrupt process from the video drive circuit 9.

8 is a flowchart illustrating interrupt processing from a video CD processing circuit 7 generated in the video CD control circuit 4 of FIG. 1. FIG.

9 is a flowchart illustrating a subroutine process of list selection process step S110 of FIG.

10 is a flowchart illustrating a subroutine process of address / decode type determination processing step S120 of FIG. 4, step S210 of FIG. 5 and step S443 of FIG.

11 is a flowchart illustrating an interrupt process generated in the video CD processing circuit 7 of FIG.

12 is a flowchart illustrating a control process for displaying a reproduction position of the video CD control circuit 4 of FIG.

FIG. 13 is a diagram illustrating an example of an icon indicating a reproduction position in a sequence of a video being reproduced.

14 is a flowchart illustrating a control process for changing the reproduction speed of skip reproduction of the video CD control circuit 4 of FIG.

FIG. 15 is a diagram illustrating an example of an operation panel of a video CD reproducing device that changes a reproduction speed.

FIG. 16 is a diagram showing a reproduction example of a video CD using a dialogue history.

FIG. 17 is a diagram showing a disc format of a video CD.

FIG. 18 is a diagram showing an example of data of a selection list.

FIG. 19 is a diagram showing an example of playlist data.

FIG. 20 is a diagram showing an example of second data of a playlist and an example of second data of a selection list.

[Explanation of symbols]

 1 Video CD 2 CD drive section 3 CD syscon 4 Video CD control circuit 5 Memory 6 CD-G processing circuit 7 Video CD processing circuit 8 DRAM 9 Audio / video drive circuit 10 TV microcomputer 21 Syscon I / F section 22 Reception processing section 23 Video CD communication unit 24 Memory control unit 25 Key input processing unit 26 Main processing unit 27 OSD processing unit 30 VR knob

Claims (5)

[Claims] 1. Decoding means for decoding a compression coded signal reproduced from a video CD and outputting a digital image signal and a digital audio signal, and the digital image using the playback control information reproduced from the video CD. A video CD reproduction comprising: a control means for controlling reproduction of a signal or a digital audio signal; and an output means for outputting a signal for displaying a current reproduction position within a division of one continuous video image. apparatus. 2. A superimposing means for superimposing a signal for displaying the current reproduction position within the boundary between the video signal output from the composite means and the video output from the output means. Video C according to item 1
D playback device. 3. A decoding means for decoding a compression coded signal reproduced from a video CD and outputting a digital image signal and a digital audio signal, and the digital image using the playback control information reproduced from the video CD. A video CD reproducing apparatus comprising: a control unit for controlling reproduction of a signal or a digital audio signal; and a changing unit for arbitrarily changing a reproduction speed at the time of reproducing the digital image signal or the digital audio signal. 4. A compression encoded signal reproduced from a video CD is decoded to output a digital image signal and a digital audio signal, and the playback control information reproduced from the video CD is used to generate the digital image signal or the digital image signal. A method for reproducing a video CD, which controls reproduction of an audio signal and outputs a signal for displaying a current reproduction position within a boundary of one continuous video image. 5. A compression encoded signal reproduced from a video CD is decoded to output a digital image signal and a digital audio signal, and the playback control information reproduced from the video CD is used to output the digital image signal or the digital image signal. A video CD reproducing method, characterized in that reproduction of an audio signal is controlled to arbitrarily change a reproduction speed at the time of reproducing the digital image signal or the digital audio signal.