JPH07334977A - Optical carrier reproducing device - Google Patents

Abstract

PURPOSE:To display an external apparatus and to monitor the change state of recorded data by outputting a control signal when the addresses of small block recording data continue. CONSTITUTION:The respective tracks of the user recording regions in succession to the UTOC area of an optical carrier 1 are composed of plural pieces of the small block recording data. The start and end addresses of the tracks and the composing data of the continuous data, etc., are recorded in the UTOC area. The start position data, end position data and connected data of the small block recording data of the plotter (track) formed by gathering at least >=1 pieces of the small block recording data discretely recorded within the user recording regions are detected 21. Next, the addresses of the end position data of one piece of the small block recording data and the start position data of the next small block recording data are compared 22. A timing signal is outputted in a time base changing position when these addresses continue.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical carrier reproducing apparatus such as an optical disk or a magneto-optical disk, and more particularly to marking block recording data recorded in a user recording area of an optical carrier at a predetermined time position. The present invention relates to an optical carrier reproducing device configured to detect information.

[0002]

2. Description of the Related Art Conventionally, as a medium for reproducing a music signal, a compact disc (hereinafter referred to as a CD) which is widely used for consumer is known. CD for playback only
A recordable optical disc in which the same disc format is recorded has been put into practical use. These recordable optical discs can be recorded only once by erasing the recording film by deforming the recording film or burning the recording film by the heat generated by the irradiation of laser light to form recording pits. can not write-once-read-many (D irect R ead A fte
r W rite: DRAW) and what is called an optical disc, similarly using a laser beam as a light source, the light source with respect to the magneto-optical disk by applying an external magnetic field from the position of the opposite, by changing the direction of the perpendicular magnetization of the recording film The rewritable type (Erasab) allows information to be recorded by
le-DRAW) magneto-optical disk.

As a recording method for such a rewritable magneto-optical disk, an optical modulation recording method and a magnetic field modulation recording method are known, but a magnetic field modulation recording method capable of overwriting recording is generally widely used.

In such an optical carrier recording apparatus of the magneto-optical modulation recording system, in recent years, by using the audio compression / expansion technology, the sampling frequency is 44.1 KHz in two channels at the reproduction level, as in the conventional CD. A magneto-optical disk having a 16-bit resolution has been proposed. In this method, the amount of information to be recorded / reproduced is compressed to 1/5 and a signal is recorded on an optical disc or a magneto-optical disc (hereinafter referred to as an optical carrier), and the information read at the time of reproduction is expanded to a CD. You are getting a similar audio performance signal.

The main specification of this system is that the disc diameter is 64.
mm, the track pitch is 1.6 μm, audio data can be recorded / reproduced for a maximum of 74 minutes, and the linear velocity of the disk is 1.2 to 1.4 m / sec. As for the performance of the audio signal, the number of channels is 2 stereo channels, the frequency band is 5 to 20 KHz, the dynamic range is 105 dB, and the recording method is the magnetic field modulation method as described above. Further signal format is a sampling frequency 44.1 KHz, modulation scheme similar EFM (E ight to F ourt and CD
een M odulation) a and error correction method also CIRC (C ross I nterleave R ee
d-Solomon is a C ode). In addition, high-performance coding scheme ATRAC (A daptive T rans
It is called a form A coustic C oding).

[0006] The ATRAC system is an analog - digital converter audio data divided by the time frame of up to 11.6m seconds, MDCT (M odified D iscr
ete C osine T ransform: modified discrete cosine transform) into a plurality of frequency bands in operation, MD
After being converted to the frequency axis by CT, it is thinned out by utilizing human auditory characteristics, and compressed to about 1/5 of the data amount. Therefore, while the recording density on the optical carrier is similar to that of CD,
The diameter of the carrier required for recording and reproducing at the same time is the CD
The diameter can be made much smaller than 64 mm.

In such an optical carrier recording device, a storage circuit for guarding a sound skip is used. Let us consider the characteristics of the system using this memory circuit. When playing a CD, C
D must feed the 1.4 Mbit / sec signal into the digital-to-analog converter (ADC) without interruption. Therefore, the reproduction signal from the CD must be read out in real time. On the other hand, compression / expansion technology A
In the case of an optical carrier recording device using TRAC, since the amount of information to be recorded / reproduced is compressed to about 1/5, the signal read at 1.4 Mbits / sec is a compressed signal, so it is decoded. However, 0.3 Mbit / sec is sufficient.
Therefore, it is only necessary to read the signal of the optical carrier intermittently or discretely.

Therefore, if the signal read from the optical carrier is stored in a storage circuit such as a buffer memory, it is possible to reproduce as many audio signals as are stored in this storage circuit.
Therefore, when a vibration is applied to the optical carrier recording device and the trace of the optical pickup deviates from its original position, and until it is recovered, if it is a CD, the sound skips, but it was stored. No interruption of sound occurs in the memory circuit. If the signal is returned from the storage circuit to the original position on the optical carrier during continuous reproduction and the signal reading is continued, no skipping occurs.

The use of the storage circuit and compression / decompression techniques described above yields another major feature. In a CD, one song, that is, a track, is always formed on a light carrier in a continuous area in a lump. However, in the case of the above-mentioned optical carrier recording device, even if divided and recorded as a plurality of small block recording data in a random area on the optical carrier, it can be formed as one song (track). It reads a signal from an optical carrier at a transfer rate of 1.4 Mbit / sec, but the transfer rate required to decode a compressed signal is
Since it is 0.3 Mbit / sec, there is a free time. Utilizing this time, the signal is once read from the optical carrier and stored in the memory circuit, and then the distant area on the optical carrier (one track is composed of a plurality of distant small block recording data). If the next small block recording data in the case), move the optical pickup, read the signal from the optical carrier, and store it in the memory circuit before the memory circuit becomes empty, without interrupting the audio signal, Can be output.

Similarly, even if the same song (track) is recorded with a continuous audio signal in a distant area on the optical carrier,
It can be played back without interruption. The state (music composition information) indicating that one track is composed of a plurality of small block recording data is registered at a predetermined position of the optical carrier as the table of contents data. Therefore, for example, when changing the song number, or when editing one song in two, there is a waiting time during the actual elapsed time of the portion to be changed. In this optical carrier recording device, it is possible to easily change it by rewriting the composition information (hereinafter referred to as concatenated data) of the tune of the area which is the table of contents data. Even in editing, the use of compression / expansion technology brings great advantages.

The format recorded on the recording surface of the optical carrier 1 called such a mini disk (MD) is shown in FIG.
It is configured like. That is, from the innermost circumference 1B of the optical carrier 1 to the lead-in 1D, UTOC (User Table).
of contents area 1E, a user recording area 1F for recording sound or the like, a track number (music number) area 1G, and a lead-out 1H, which reach the outermost periphery 1C of the optical carrier 1. In the user recording area 1F, for example,
The songs corresponding to the addresses A to L as shown in the right table are recorded for each of the song numbers 1 to 6. In the UTOC area 1E, table-of-contents data which is an address of a track (song) recorded in the user recording area 1F is recorded. This table of contents data is A,
C, E, G, I, K start address of song number and B,
It is composed of end addresses of music numbers D, F, H, J, and K.

The addresses indicated by A to L are 13.3 m / m of the pre-groove previously formed on the optical carrier.
It can be easily detected with a meandering period of s.

In the table of contents data in the above-mentioned UTOC area 1E, for example, if the third music is erased in the right table of FIG. 6, both the music No. 3 and the address EF are blank, and the music No. 4,
5 and 6 are moved up in sequence, and song number 3 (address G,
H), song number 4 (addresses I and J), and song number 5 (addresses K and L).

Similarly, for example, when the tune numbers of 4 and 5 in the table of contents data in the UTOC area 1E are combined into one, tune numbers 4 and 5 are combined to give tune number 4, the start address is G and the end address is J. The number 6 becomes the music number 5, and the start and end addresses are the same as K and L. That is, even if various types of editing are performed, at the time of recording and / or reproducing, the tune connection is recorded as the concatenated data as the table-of-contents data of the UTOC area 1E.

The above-mentioned MD disc format will be described in detail. In the MD, the EFM described above is used as the modulation method for writing on the disc, the CIRC is the error correction code, and the audio data (CD-ROM data) information-compressed in this format is collectively recorded for each block. That is, the mode 2 of the CD-ROM standard is used.

FIG. 7 shows such an EFM frame structure. One EFM frame is composed of 588 channel bits, and the EFM frame pattern 30 for synchronization of 24 bits is sequentially arranged from the left, and the subcodes 31 and 12 of 1 symbol.
Symbol audio data (CD-ROM data) 3
It is composed of error correction codes 33 of 2, 4 symbols, audio data (CD-ROM data) 34 of 12 symbols, and error correction codes 35 of 4 symbols. In addition, although not shown, there are 3 combined bits between each symbol. One symbol has 14 bits, and one EFM frame has 588 bits. 3 EFM frames for synchronization
This is a signal for finding the head when two symbols are collectively recorded, and one subcode is added per 1EFM frame, and P, Q, R, S, T, U, V,
It consists of 8 bits of W (bit before EFM).
In particular, the subcode Q is widely used for access to a digital audio signal CD, display of track numbers, and display of elapsed time.

The audio data (CD-ROM data) 32 and 34 are 24 bytes of data in one EFM frame (6 samples = 2 channels × 16 bits × 6).
In order to collect 98 EFM frames to form one sector, the CD-ROM data 32 and 35 per sector is 24 × 98 = 2352 bytes. Therefore, one sector is equal to P to W of the subcode 31 formed by collecting 98 EFM frames.

A disk format peculiar to MD based on the above-mentioned one sector will be described with reference to FIG. 8B shows the data structure of the sector of the user recording area 1F. UTO
The data structure of the C sector is slightly different and will be described later.

In FIG. 8B, the configuration contents of 2352 bytes of one sector are as follows: from the left, a 12-byte sector sync 40, then a 4-byte sector address 41, and a 2336-byte data 42 (compressed audio data in these data). 43 is 2332 bytes).
In the data, in the case of the user recording area 1F of FIG. 6, compressed audio data 43 is recorded, and in the UTOC area 1E, track connection information, disc name,
Contains track names and table of contents of recorded date and time data. The sector sync 40 is a sync signal for identifying the beginning of one sector. Sector address 41
Is a 2-byte cluster 41a and a 1-byte sector 4
1b and 1-byte mode 41c, both cluster 41a and sector 41b indicate an address. In the mode 41c, stereo / mono distinction, emphasis information, and the like are defined as audio information necessary for each track (song). The data 42 is
The first 4 bytes are 0 regardless of the data,
The subsequent 2332 bytes are composed of compressed audio data 43. The cluster 41 indicating the address
The a and the sector 41b are represented by binary numbers.

Further, one cluster is 3 as shown in FIG. 8A.
It consists of 6 sectors and is recorded with an integer value of this unit. In FIG. 8A, taking the Nth cluster as an example, FC (hexadecimal), FD of the first half cluster of the Nth cluster
The three sectors (hexadecimal) and FE (hexadecimal) are link sectors 44 that are discarded sectors, and FF (hexadecimal).
Is a sector 45 for sub data, and audio data 4
Differentiate from 2. Compressed audio data 43 is recorded in 32 sectors from 00 (hexadecimal) to 1F (hexadecimal). In the case of the CD format, the interleaving length of the CIRC as an error correction code is as long as 108 EFM frames (14.5 milliseconds). Therefore, in order to record data using the error correction code of the CIRC, three link sectors are used. It is necessary to make 44 an unnecessary waste sector. This area is called a link area, but it is necessary to prepare an extra link area of 108 EFM frames or more before recording data, and also secure an extra area of 108 EFM frames or more at the end of recording. If this is not the case, error correction cannot be completed, and such a link area must be provided.

The sector of the sub data 45 is secured in preparation for future improvement of the MD function, and its application to graphics data and the like is considered. Further, the compressed audio data 43 will be described with reference to FIG. 424 in MD
Bytes of compressed audio data are treated as one unit, and this is called a "sound group." When compressed data of a total of 424 bytes of left and right channels is expanded and returned to time axis information, 512 samples (2 channels x 16 bits) X 512 = 2048 bytes). 42 from this
Since it is 4/2048 = about 1/5, it is obvious that it is compressed to 1/5. This 1 sound group consists of 512 samples x sampling frequency 44.1KH
Since z = 11.6 msec, the time is 11.6 msec as shown in D of FIG.

In the MD, 11 sound groups of 424 bytes are collected and recorded in 2 sectors.
As shown in C of FIG. 8, the sound groups 0, 1, 2, 3,
Place 4 and 5 halves in even sectors, and from 5 half to 6, 7, 8, 9, A (hexadecimal) sound groups
It is located in the odd sector. Further, the recording of the compressed audio data 43 and the like is stored in a storage circuit once as described later, and when the compressed recording audio data of one cluster or more is accumulated, the storage circuit at the time of reproduction is also used for recording to the MD. It is designed to record.

[0023]

When a recording / reproducing operation is performed by using the MD as described above, during recording of a predetermined track (song), additional information such as detailed information is recorded at a predetermined time position of the track (song). Cannot be set. In the case of CD, the detailed information is additional information for managing the audio signal, that is, the index number defined in the subcode Q. On a CD, index numbers 0 to 99 can be sequentially set and recorded as information for dividing and managing one track (song) more finely. Therefore, even if the same track (song) is further finely divided at the time position where the index number increases, the cue can be performed. During playback, using this transition, a timing signal is output to the outside of the device to notify the predetermined remaining time of the track (song), or it is specified in the same track (song). It is possible to use such that only a section (in the case of a CD, a section having a designated index number) is reproduced. However, as detailed in the conventional configuration, MD
In the disk format, additional information such as Q index number like CD is not defined, so that there is a problem that it cannot be used as described above.

That is, in the above-mentioned MD, the case where one music number is recorded on one track at the time of editing has been described, but one music number (track) is divided into a plurality of small block recording data, and this is discretely recorded. Consider a case in which the block recording data (1 track data) is arranged in the above.

Now, even if the subcode Q is set in order to arrange the small block recording data discretely recorded on the optical carrier as described above, the subcode must be rewritten, which is inevitable. There is a problem that even if Q is defined, it is useless and the time management of the tune cannot be performed unless the configuration is extremely complicated.

The present invention has been made to solve the above problems, and its object is to record a plurality of small block recording data recorded discretely in a user recording area of an optical carrier. End position data of one small block recording data of the plurality of small block recording data, start position data of small block recording data to be connected next, and small block recording data to be connected next to the signal block (track or music) By determining the connection state of the start position data and recognizing that the subdivision information has changed when it is continuous, a timing signal for operating the external device etc. is output at this change time position. An optical carrier reproducing apparatus is provided.

[0027]

As shown in FIG. 1, the optical carrier reproducing apparatus of the present invention divides data to be recorded into small block recording data, and divides the small block recording data. An optical carrier 1 in which at least one or more block recording data are recorded in a user recording area and table data including start and end position data of the small block recording data and concatenated data are recorded in an area other than the user recording area. And a table of contents data detecting means 21 for detecting the table of contents data including start and end position data of the small block recording data recorded on the optical carrier 1 and concatenated data, and the end of a plurality of one block recording data forming the block recording data. An ad that compares the position data and the continuous state of the address of the start position data of the small block recording data to be connected next. When the output from the address comparison unit 22 and the storage comparison unit 22 and the storage unit 9 for writing and reading a plurality of block recording data and table of contents data are continuous, it is assumed that the subdivided data of the block recording data has changed. The control means 15 outputs a timing signal at the axis changing position.

[0028]

According to the present invention, in the user recording area of the optical carrier,
At least one small block recording data recorded discretely
Block recording data (track) formed by collecting one or more
By detecting the start position data, end position data, and concatenated data of the small block recording data, the end position data of one small block recording data is compared with the start position data of the next small block recording data. By outputting a control signal when the addresses are continuous, it is possible to obtain an optical carrier reproducing device capable of operating the external device or monitoring the change state of the recorded data by displaying it on the display means.

[0029]

EXAMPLE As an optical carrier reproducing device of the present invention, a MD as an optical carrier, which has been described in detail in the conventional configuration, is 68 mm × 72 m.
An optical carrier reproducing device which is rotatably arranged in a m × 5 mm size cartridge and is capable of recording and / or reproducing an MD in the cartridge (in the present invention, an optical carrier reproducing / recording device and an optical carrier recording device). The configuration including the optical carrier reproducing device) will be described.

FIG. 1 is a system diagram showing an embodiment of the optical carrier reproducing apparatus of the present invention, in which 1 represents an MD as an optical carrier,
The MD1 is rotatable in the cartridge 1A, and is brought onto the turntable 2B of the player 2 by rotating the cartridge 1A in the optical carrier reproducing device. The MD1 is turned in the turntable 2B in the cartridge 1A.
It is fixed at the center at the top and is rotatable by the spindle motor 2A. An optical pickup 4 is arranged below the cartridge 1A, and a magnetic head 16 is arranged above the cartridge 1A. By opening a shutter provided in the cartridge 1A, the laser light from the optical pickup 4 is directed in the radiation direction of MD1. It is slidable by the slide motor 18. The magnetic head 16 is a magnetic field generation unit for giving a magnetic field of the NS pole corresponding to the recording signal to the MD 1, which will be described later.

The servo control circuit 3 is a spindle motor 2A.
Spindle control, slide control of the slide motor 18, focus control and tracking control of the optical pickup 4, laser control of the semiconductor laser in the optical pickup 4, etc. The spindle motor 2A is controlled by the spindle control circuit in the servo control circuit CLV. (Cons
(tant Linear Velocity) is controlled to give the required number of rotations.

Further, the slide motor 18 controls the slide motor control circuit in the servo control circuit 3 to slide the optical pickup 4 in the radial direction of the MD 1, and the optical pickup 4 also has a focus in the servo control circuit 3. A control circuit, a tracking control circuit, and a laser control circuit control focus, tracking, and semiconductor laser on / off.

First, the reproduction system will be described with reference to FIG. MD1
Recorded information is read by the optical pickup 4, passes through the head amplifier 5, and is transmitted to the address decoder 6 and the EFM.
/ CIRC modulation / demodulation circuit 7. The address decoder 6 detects and decodes the address information superimposed on the CLV control sine wave signal in which the pre-groove preformed in the MD 1 meanders by a slight amount. This output is applied to the EFM / CIRC modulation / demodulation circuit 7. EF
The M / CIRC modulation / demodulation circuit 7 demodulates the EFM and CIRC, and the output is the vibration-proof memory controller 8.
Is input to.

The vibration-proof memory controller 8 has a function of accumulating the data from the EFM / CIRC modulation / demodulation circuit 7 input for reproduction in a storage circuit 9 such as a buffer memory.
It also has a read function for sending the compressed data to the ATRAC modulation / demodulation circuit 10. A
The TRAC modulation / demodulation circuit 10 demodulates the compressed data, sends the demodulated data to a DAC (digital-analog converter) 12, and outputs an audio output to a reproduction output terminal 13.

Next, the recording signal path in FIG. 1 will be described. A recording input signal such as voice is input from an input terminal 14 and converted into digital data by an ADC (analog-digital converter) 11. Digital data is ATRA
The C modulation / demodulation circuit 10 converts the compressed data into the above-mentioned compressed data and stores the recorded compressed data in the storage circuit 9 via the vibration-proof memory controller 8. When the storage amount in the storage circuit 9 reaches a predetermined amount, the recording data is recorded in MD1. That is,
The vibration-proof memory controller 8 reads the stored data from the storage circuit 9 and outputs it to the EFM / CIRC modulation / demodulation circuit 7.

In the EFM / CIRC modulation / demodulation circuit 7, E
The FM and CIRC are modulated and the output is output to the magnetic head drive circuit 17, and the magnetic head drive circuit 17 generates magnetic fields of N and S poles corresponding to the recording EFM signal, and passes through the magnetic head 16 to MD1. Apply a magnetic field. On the other hand, MD
The recording laser (high-power laser) output via the servo control circuit 3 in response to a command from a system controller 15 including a computer or the like is irradiated onto the MD 1 from the optical pickup 4 arranged in the opposite direction to 1. MD1
The magnetic field from the magnetic head 16 sandwiching the magnetic field between the magnetic head 16 and the magnetic body of the MD 1 is set to the Curie point or higher by the laser from the optical pickup 4, the EFM-modulated magnetic field is applied from the magnetic head 16 to change the direction of the magnetic field, and the signal is sent to the MD 1. Records are made.

On the other hand, in order to move the optical pickup 4, a slide control signal from the system controller 15 is applied to the slide motor 18 via the servo control circuit 3 to move the optical pickup 4.

The system controller 15 records
Command signals for all controls such as reproduction and search operation of the optical pickup 4 and detection signals such as address information of the MD 1 are transferred to the servo control circuit 3, the EFM / CIRC modulation / demodulation circuit 7, the vibration-proof memory controller 8 and the bus. The control data is transmitted and received via the connection. Reference numeral 20 denotes an input device unit of the system controller 15, which is an operation unit having various command signals and ten keys, and 19 is a display device such as a liquid crystal for displaying various data and output pulses from the system controller 15, for example, at the time of reproduction. The track number and elapsed time are displayed on the track (song).

Further, as will be described later, the system controller 15 outputs a timing pulse signal to a pulse output circuit 23 for outputting a timing signal to the external electronic device 25 during reproduction. A pulse detection circuit 24 built in the external electronic device 25 detects the timing pulse from the pulse output circuit 23 and operates the external electronic device.

Further, as will be described later, reference numerals 21 and 22 show the circuit constructions of the table-of-contents data detecting means and the address comparing means of this embodiment.

A general track recording method of the optical carrier reproducing apparatus having the above-mentioned structure will be described below. The format of the recording surface of the MD1 used in this example is configured as shown in FIGS. 6 to 8 described in the conventional configuration. FIG. 2 is a sectional view in the radial direction of the optical carrier used in the optical carrier reproducing apparatus of the present embodiment, showing a state in which up to the fourth track is recorded, as seen from the side surface of the optical carrier.

Now, as shown in FIG. 2, the first track TR is already recorded in the user recording area 1F following the UTOC area 1E of the optical carrier.
₁ is recorded signals acoustic etc. to the fourth track TR _4, it is assumed that the tracks TR ₁ to Tr ₄ is constituted by a plurality of small blocks recorded data B ₁ .about.B _8. The recording data thus discretely recorded is ATRAC.
It can be taken out as continuous recording data by the technique.

The constituent data such as the start and end addresses of these tracks and continuous data are UTOC as described above.
Additional data such as year and date data, disc name, track name, etc. recorded in the area 1E and, as will be described later, addresses of empty blocks and unrecorded areas that do not belong to any track in the user recording area 1F are also defined. It is possible to record and register. A shown in FIG.
B, C, D, E, F, ... L, M schematically indicate the addresses of the start position and end position of the small block recording data.

As shown in FIG. 2, the first track TR ₁ is TR ₁ (1), T indicated by small block recording data B ₁ , B _2.
R ₁ (2), and the reproduction order is B ₁ → B ₂ .

Further, the second and third tracks TR ₂ and TR ₃ are composed only of TR ₂ (1) and TR ₃ (1) shown by the small block recording data B ₂ and B ₆ , and the reproducing order thereof is of course. Only B ₂ or B ₆ .

Similarly, the fourth track TR ₄ is RT indicated by small block recording data B ₄ , B ₅ , B ₇ , and B _8.
4 (1), TR ₄ (2), TR ₄ (3), TR ₄ (4)
The reproduction order is B ₄ → B ₅ → B ₇ → B ₈ .

In the recording method of the separated small block recording data, the block recording data (track) is first recorded, not the intentional recording at the time of recording on the unrecorded portion (blank) of the optical carrier 1. At one time, each track was composed of one small block recording data, but as a result of subsequent editing, it was formed into a plurality of small block recording data B _{1 to} B ₈ .

When the cartridge 1A having the thus recorded MD1 is inserted into the optical carrier reproducing apparatus shown in FIG. 1, each track T recorded in the UTOC area 1E is recorded.
The optical pickup 4 is moved to the UTOC area 1E of MD1 in order to read the table of contents data of R _{1 to} TR _{4, and} the table of contents data read by the optical pickup 4 is the head amplifier 5
Via the EFM / CIRC modulation / demodulation circuit 7 through the vibration-proof memory controller 8 and stored in the storage circuit 9. After that, the table data detecting means 21 is configured such that the system controller 15 reads the read table of contents data of each track through the vibration-proof memory controller 8. The reproduction order of each track is such that each track is formed. In the above sequence, the system controller 15 reads out from the UTOC area 1E of the optical carrier 1 as concatenated data indicating the concatenated state of the small block recording data.

FIG. 3 is a table in the UTOC area 1E in the recording state of the block recording data shown in FIG.
Each track TR _{1 to} T read from the TOC area 1E
The table of contents data of R ₄ (song) is shown. The first track TR ₁ is composed of _{TR 1 (1) ~TR 1 (} 2), starting at the start position address A, the small-block record data B ₁ to terminate at the end address B, starting at the start address E However, it is composed of small block data B ₃ which ends at the end address F. Similarly, the second and third tracks TR
₂ and TR ₃ are 1 of TR ₂ (1) and TR ₃ (1), respectively.
4th track T
R ₄ is TR ₄ (1), TR ₄ (2), TR ₄ (3), T
It is formed from four small block recording data of R ₄ (4). The track TR ₄ starts with the start position address G and ends with the end address G ′. Small block recording data B 4
A small block record data B5 starting at the start position address G ″ and ending at the end address H, a small block record data B7 starting at the start position address K and ending at the end address K ′, and a start position address K ″. A total of 4 of small block recording data B8 that starts and ends at the end address L
It is formed of individual small block recording data. The reproduction order is that the small block recording data B4 is first, the small block recording data B5 is next, and the small block recording data B is next.
7, and finally the small block recording data B8. In the small block record data B8, track TR ₄ continuous data will be terminated is as shown in the code 51 to 54 of FIG.

In addition, the information of the UTOC area 1E is shown in FIG.
User recording area 1 shown in FIG.
In F, an area that does not belong to any track can be registered, but since it does not exist in FIG. 2, it is “none”.

Further, in the information of the UTOC area 1E, from the address M of FIG. 2 to the outer periphery 1C of MD1, all are unrecorded, so that it is registered as information to be used at the time of later track (song) recording. ing. Therefore, the start address 56 of the unrecorded area in FIG. 3 indicates that the address M and subsequent addresses are unrecorded areas.

The above-mentioned track connection information, empty block information, and unrecorded area information are read by the system controller 15 of FIG. 1 when the MD1 is inserted into the optical carrier reproducing device, and are recorded at a future track (song). To use.

[0053] UTOC area 1E and the small block record data B ₁ .about.B ₈ and address and the like constituting the block record data is configured as the ordination, but disk format MD described in FIGS. 7 and 8 Considering the case of designating the start address and end address of the small block recording data forming each track, one cluster is 3
There are 6 sectors, 2 sectors are 11 sound groups, and the minimum resolution is 11.61 of 1 sound group.
It will be a millisecond. This value is 13.3 of subcode Q of CD.
This indicates that it is possible to specify the time somewhat shorter than milliseconds. In addition, one sector has 5.5 sound groups and 6
It is 3.8 milliseconds, and one cluster is 32 × 63.3 milliseconds, which means that the audio data is expanded to the time axis information of about 2.04 seconds. Based on the disc format structure of the MD as described above, the MD in which the first to fourth tracks TR _{1 to} TR ₄ are recorded as shown in FIGS. 2 and 3.
1 is reproduced by the optical carrier reproducing apparatus of FIG.
And it demonstrates with the flowchart of FIG.

In FIG. 4 and FIG. 5, in the first step ST1, the CPU of the system controller 15 always checks whether or not the reproduction standby command of the track to be reproduced is received. When the reproduction standby command is received, the process proceeds to the second step ST2, and the connection state of the table-of-contents data of the designated track to be reproduction standby is read. When the MD1 is inserted into the optical carrier reproducing apparatus of FIG. 1, the track concatenation data is the UTOC area 1 first.
Since the presence or absence of the table of contents data of E is checked and read and stored in the memory circuit 9, the system controller 15 reads and recognizes this memory circuit 9.

In this operation, for example, when there are tracks TR _{1 to} TR ₄ composed of a plurality of small block recording data B _{1 to} B ₈ , these contact data are read and recognized in advance.

In the third step ST3, starting from the start address A of the first small block recording data B ₁ forming the tracks TR _{1 to} TR ₄ , the compressed audio data is started to be stored in the storage circuit 9 from MD1. When the optical carrier reproducing device is in the stopped state, when the above step is performed, the spindle motor 2A is started, the focus servo control circuit and the tracking servo circuit are turned on, and the search operation to the designated address is performed, and then the designated address is used. M
The audio signal is reproduced from D1 and the compressed audio data is stored in the storage circuit 9. If this amount of stored data is sufficiently stored in the storage circuit 9, it is possible to effectively cope with an emergency without causing a track jump due to external vibration.

In the fourth step ST4, the CPU of the system controller 15 checks the reproduction start command.
If "YES" here, the fifth step ST5
Then, the compressed audio data is stored in the storage circuit 9 via the anti-vibration memory controller 8 and modulated / demodulated by the ATRAC 1
Transfer to 0 and start outputting a voice signal.

At the same time when the output of the audio signal is started, the output control of the audio signal (conversion of the elapsed time of the track, etc.),
The system controller 15 processes in parallel the control of reading data into the memory circuit 9 and managing the storage amount thereof.

Next, in the sixth step ST6, the storage circuit 9
It is checked whether or not the remaining amount of is less than or equal to a predetermined amount, and if it is less than or equal to the predetermined amount, the operation in and after the ninth step ST9 is performed, and if sufficiently stored, the process proceeds to the seventh step ST7. . Memory circuit 9 during playback
As described above, it is more effective to read the data in such a manner that the data is fully stored in and stored in.

When the storage amount of the storage circuit 9 is less than or equal to the predetermined amount, the operation of immediately reading is started. That is, in the ninth step ST9, data is similarly read and stored from the address following the first address read in the previous third step ST3 by the amount vacant to be reproduced and output by the memory circuit 9.

Next, in the tenth step ST10, it is checked whether or not the track (song) being reproduced is block recording data composed of a plurality of small block recording data, and the last small block recording data of the track is checked. It is checked whether reading to the memory circuit 9 has been completed up to the end position address. Tenth step ST10
In the case of "YES", the process proceeds to the eleventh step ST11, where it is recognized that all the compressed audio data of the reproduced track has been read into the storage circuit 9, and the process proceeds to the twelfth step ST12.

In the twelfth step ST12, the track (song) to be reproduced next to the track (song) currently being reproduced is set. Subsequently, the process proceeds to the second step ST2, and the compressed audio data of the track (song) to be newly reproduced is read and stored in the storage circuit 9 and the twelfth step ST1.
The operations up to 2 are repeated.

In the tenth step ST10, when the storage in the memory circuit 9 is not completed up to the last address of the track, the process proceeds to the thirteenth step ST13. First
In the three-step ST13, it is checked whether the address read next to the memory circuit 9 is the start address of the small block recording data forming the track.

This is to check whether, among the small block recording data forming the same track, the address from which compressed audio data is read out next is the start address E, G ", K" of the small block recording data. Is. Since the second track TR ₂ and the third track TR ₃ shown in FIG. 2 are formed by one small block recording data B ₂ or B ₆ , these tracks are not applicable. . Therefore, the result is "NO", the process moves to the sixth step ST6, and the steps described up to this point are repeated to perform reproduction. However, the first track T shown in FIG.
R ₁ and the fourth track TR ₄ are just small block recording data B ₁ and B ₃ , B ₄ and B ₅ , B ₅ and B ₇ , B ₇ and B _8.
If it reaches the turning point of, it becomes "YES" and the 14th
The process proceeds to step ST14.

More specifically with reference to the example of FIG. 2, in the case of the first track TR ₁ , small block recording data B ₁ (TR
₁ (1)) to small block recording data B ₃ (TR
₁ (2)) when the compressed audio data is read from the start position address E and below, or in the case of the fourth track TR ₄ , the small block recording data B ₄ (TR ₄ (1)) to the small block recording data B ₅ ( When the compressed audio data is read from the start address G ″ or less of TR ₄ (2)) and the start address of the small block recording data B ₅ (TR ₄ (2)) to the small block recording data B ₇ (TR ₄ (3)) When reading the compressed audio data from K or less, and when reading the start address K ″ or less of the small block recording data B ₇ (TR ₄ (3)) from the small block recording data B ₈ (TR ₄ (4)) Otherwise, the process returns to the sixth step ST6.

When the process proceeds to the 14th step ST14, it is judged whether the address which is the start address of the small block to be read next and the end address of the preceding small block recording data are continuous addresses. . That is, the cluster address 41 of the small block recording data to be read next is the cluster 41a, the sector 41b,
It is to check whether or not each number such as the sound group is consecutive from each number such as the cluster 41a, the sector 41b, the sound group, which is the end sector address 41 of the previously read small block recording data. Of course, the link sector 44 of FIG. 8A showing the cluster structure of MD1 and the sector for the sub data 45 are not the compressed audio data area, so they are excluded and checked.

If the addresses are not consecutive in the check in the fourteenth step ST14, "NO" is returned and the process returns to the sixth step ST6. If it is continuous, the process moves to the fifteenth step ST15. In the fifteenth step ST15, it is recognized that the track subdivision signal has been detected in the track currently being reproduced.

Originally, when there are a plurality of small block recording data constituting one track (song), the small block recording data B1 and the small block recording data B3 are as shown in the track TR ₁ of FIG. It is distributed and recorded on MD1. However, the small block recording data B4 and B5 of the track TR ₄ are divided into two even though they are continuously recorded on the MD1. That is, two small block recording data B4 and B
5 should be one small block recording data which starts at the start address G and ends at the end address H. Where
In this example, on the MD1, the small block recording data is divided into areas continuously recorded on the same track at designated time positions within this track (song). This is because a mark is placed at a designated position in the track. And the fifteenth step ST
At 15, the end addresses of a plurality of small block recording data forming one track (song) on the MD1 and the next small block recording data are calculated from the track concatenation data which is the table of contents data of the recorded tracks. The address comparison means adopting the same configuration as the detection circuit 21 for checking whether the start addresses of the two are continuous, and whether it is normal small block recording data concatenation or marking at a specified time within a track (song). It is made to compare at 22.

The purpose of marking in this way is to use information for making the inside of a track (song) more detailed, and to output a timing signal to the outside of the device at a designated time during reproduction of the track (song). Used.

Then, in the fifteenth step ST15, as a result of detecting the marking information, a flag is set so that a subdivided signal is output when the time position where the voice is reproduced and output is passed. This is because the time conversion when decompressing (demodulating) the compressed audio data is necessary for demodulating the compressed audio data stored in the predetermined memory address of the storage circuit 9. Of course, the CPU in the controller 15 is set so as to perform the calculation and output at the time position where the voice is actually output.
Next, returning to the sixth step ST6, each step is repeated.

The flag set in the fifteenth step ST15 is checked in the seventh step ST7. That is,
When the sound is reproduced, this is detected, and when the elapsed time of the track set in the fifteenth step ST15 is reached, the condition of the seventh step ST7 is satisfied and "YES" is reached, and the process proceeds to the eighth step ST8. . Eighth step S
At T8, detailed information on the track is output.

Specifically, it is output as a timing signal to the outside of the optical carrier reproducing device. For this purpose, the system controller 15 commands the pulse output circuit 23 to output a pulse. A pulse width of about 100 milliseconds is sufficient. For this purpose, as described above, for example, the electronic device 25 outside the optical carrier reproducing apparatus is used as a trigger signal to be operated because a predetermined elapsed time has passed in the track during the sound output. Based on this trigger signal, the pulse detection circuit 24 connected to the external electronic device 25 receives a pulse and uses it as a control signal for starting the operation of the external electronic device 25.

Further, like the index number of the CD, the system controller 15 outputs to the display device 19 data for displaying, for example, a track number or a time code (elapsed time in the track), and the operator is informed. It is also possible to visually notify detailed information. For example, the display device 19
As the subdivided number (INDEX NO.) 62 in the track No., it has been "01" until now, but it can be switched to "02" and displayed.

A specific example of this configuration is shown in the display device 19 of FIG. Track number T. NO. 61 is a three-digit numerical display, which is a subdivided number INDEX NO. Reference numeral 62 is a two-digit number display, and MIN63 and SEC64 are display of minutes and seconds of time, respectively. MD1 is the one that made the track number 61 three digits.
In the case of, since the tracks can be numbered up to 255 tracks, this is supported. An LED, a liquid crystal display, an FL tube, or the like can be used as the display element.

As described above, according to the optical carrier reproducing apparatus of the present invention, it is possible to surely know the joint position of the small block recording data marked at the time of recording, that is, the time position at the time of recording. Various time positions can be used.

In the above-mentioned embodiment, the marking of only one point is specified on the track. However, by using a plurality of markings as the index number in the same manner as the CD, the specified index number can be assigned to the same track. If you search directly for the corresponding position and make it playable, or if you consider it to be the same as the index number,
It is possible to repeatedly reproduce only a predetermined index section. When the marking position is set to the designated remaining time of the track, the system controller 15 starts the display for notifying the end position of the track at the marked time position during reproduction of the track, and the operator It is also possible to visually notify the end status to.

Also, in the above-mentioned embodiment, the marking information (subdivided information) in the track (song) was checked while reproducing, but MD1 was inserted into the optical carrier reproducing device, and first, the contents of the UTOC area 1E were searched. After the presence or absence of data is checked and read into the memory circuit 9, it is checked in advance how many markings (detailed information) each track (song) has, and if the system controller 15 manages, the As described in the example, it is not necessary to check 14 steps ST14 of FIG. 4 every time reproduction is performed. Then, if checked in advance, it is clear that the reproduction can be performed from the subdivided (marking) position in the directly designated track.

[0078]

According to the present invention, by constructing and operating as described above, while recording one track (song) on the optical carrier, a plurality of markings are made at a predetermined time position (so to speak, in the track). Can be recorded as information for subdividing, and is recorded on the optical carrier. Therefore, at the time of reproduction, it can be output to an external electronic device of the optical carrier reproducing device or displayed. Or it is possible to reproduce a designated section in a track (song), and it is possible to provide an optical carrier reproducing device whose usage is improved.

[Brief description of drawings]

FIG. 1 is a system diagram of an embodiment of an optical carrier reproducing device according to the present invention.

FIG. 2 is an explanatory diagram showing a state in which recording is performed up to a fourth track of the optical carrier of the present invention.

FIG. 3 is a diagram showing the table of contents data read from the UTOC area in the recording state shown in FIG.

FIG. 4 is a flowchart (1) of the optical carrier reproducing device of the present invention.

FIG. 5 is a flowchart (2) of the optical carrier reproducing device of the present invention.

FIG. 6 is an explanatory diagram of a UTOC area of a conventional optical carrier.

FIG. 7 is a configuration diagram of a conventional EFM frame.

FIG. 8 is an explanatory diagram of a conventional MD data format.

[Explanation of symbols]

 1 MD (magneto-optical disk) 9 storage circuit (buffer memory) 15 system controller (CPU) 21 detection circuit 22 address comparison circuit

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] June 21, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

The addresses indicated by A to L are 13.3 mm of the pre-groove preformed on the optical carrier.
It can be easily detected with a meandering cycle of seconds .

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location G11B 19/06 B 7525-5D 20/12 9295-5D

Claims (3)

[Claims] 1. The data to be recorded is divided into small block recording data, which is recorded in a user recording area as a plurality of block recording data in which at least one small block recording data is collected, and the small block recording data is recorded. An optical carrier in which index data including start and end position data and concatenated data is recorded in an area other than the user recording area, and index data including start and end position data of small block recording data recorded in the optical carrier and concatenated data And a continuous state of the addresses of the end position data of a plurality of small block recording data constituting the block recording data and the address of the starting position data of the small block recording data to be connected next are compared. Write address comparison means and the above block recording data and table of contents data When the output from the address read / write means is continuous, the control means outputs a timing signal at the time axis change position, assuming that the subdivided data of the block recording data has changed. Optical carrier reproducing device. 2. The optical carrier reproducing device according to claim 1, wherein the timing signal is used as a control signal for an external device added to the outside of the optical carrier reproducing device. 3. The optical carrier reproducing device according to claim 1, wherein the control means outputs display data to the display means when the timing signal is output.