KR100554783B1 - Variable speed reproduction information recording apparatus and method, and reproduction apparatus and method using same - Google Patents

Abstract

The present invention relates to an apparatus and method for recording and reproducing digital data streams, and a apparatus and method for using the same, wherein the apparatus and method for recording and reproducing digital data streams are divided into basic units of access during reproduction. Step 1 to do; Confirming a bit rate of the input and recorded digital data stream; And three steps of controlling generation of control information for shift reproduction during reproduction according to the identified bit rate. The data stream is divided into recording units and recorded in the recording unit. The shift regeneration information for recording and recording the recording position information of the recorded base image data for each recording unit is selectively generated and recorded according to the number of the base image data of the recording unit or the input speed of the data stream, or the generated recording By additionally recording identification information for identifying whether the shift reproduction information is correct, the error of shift reproduction information caused when a plurality of base image data is recorded in one recording unit is prevented in advance, so that a more accurate shift reproduction operation is performed. It is a very useful invention to be made.

Variable speed playback, Recording unit, Base image data, Entry point data, Bit rate

Description

Device and method for recording and reproducing information of a digital data stream, and a device and method for reproducing the same.             

1 shows a record aggregation management information (SOBI),

FIG. 2 shows general information on the aggregate information (SOB_GI).

3 shows entry point flag information EP_FLAG.

4 shows entry point data (EPD),

5 shows entry point general information (EP_GI),

6 shows a mapping diagram between entry point general information and a recording unit;

7 illustrates entry point start position list (EPSLL) and end position list (EPELL) information,

8 shows a mapping diagram between entry point start position list (EPSLL) and end position list (EPELL) information and application packets of a recording unit;

9 shows a presentation time information list PTSL,

10 is a schematic structural diagram of an optical disk device to which the present invention is applied;

11 is a flowchart illustrating an operation of a method for recording shift reproduction control information of a digital data stream according to an embodiment of the present invention.

12 illustrates header information included in a digital data stream in a pack unit.

FIG. 13 is a flowchart illustrating an operation of a method for recording shift reproduction control information of a digital data stream according to another embodiment of the present invention;

FIG. 14 illustrates identification information IDX_Flag additionally recorded according to another embodiment of the present invention.

15 is a flowchart illustrating an operation of a method of shifting reproduction of a digital data stream according to an embodiment of the present invention.

FIG. 16 is a flowchart illustrating a method of shifting and reproducing a digital data stream according to another embodiment of the present invention.

※ Explanation of code for main part of drawing

10: optical pickup 20: analog signal processing unit

30: digital signal processor 40: A / V signal processor

50: control unit 60: memory

The present invention generates and records shift reproduction information for searching and managing an intra picture data stream in a recording unit that can be randomly accessed, and when a shift reproduction request is made, the shift reproduction information corresponds to the requested shift. The present invention relates to a variable speed reproduction information recording apparatus and method for a digital data stream for shift reproduction, and a reproduction device and method using the same.

Digital Versatile Disc (DVD), a recently developed video disc recording medium, is capable of recording and storing a large amount of video data streams and is capable of various playback operations, so it is expected to be widely spread as a video recording medium in the future. It is becoming.

As described above, in the variable speed reproduction operation of the reproduction operation of the DVD, a recording unit (SOBU: Stream OBject Unit) in which the data stream is divided and recorded in units of 32 sectors (Sector, 1 Sector = 2048 bytes) Selective reading and reproducing the base image data in the), and typically shifting reproduction at a shift corresponding to 2 ⁿ (n = 1,2,3 ..) such as 2x, 4x, 8x, etc. according to the user's selection. If the double speed reproducing operation is a double speed reproducing operation for selectively reading out and reproducing all of the base image data recorded in each recording unit, the four speed reproducing operation is based on the base image data recorded in each recording unit. Is a double speed playback operation for intermittently selecting and reading out one by one, and the eight times playback operation intermittently intersects two pieces of base image data recorded in each recording unit. This is a double speed replay operation for selecting and reading and reproducing.

However, in order to read out and reproduce all or intermittently the base image data recorded in the recording unit as described above, when the shift reproduction request is made, the base image data in all the recording units is searched individually, and the retrieved base image data is recalled. There is a problem in that the burden on system control is greatly increased because it is necessary to select and read out all or intermittently corresponding to the requested shift.

Accordingly, the shift reproduction information, which is management information for recording and recording the recording position of the base image data, is separately generated and recorded, and when the shift reproduction request is made, the recording position information of the base image data recorded and managed in the shift reproduction information is searched and shifted. Background Art A method for recording and reproducing shift reproduction information, which makes it easier to search the recording position of base image data for reproduction, has been proposed by related companies.

In the proposed shift reproducing information recording method, first, recording position information of the base image data is generated and recorded as the shift reproducing information, and in order to minimize the recording size of the shift reproducing information, one base image data is recorded for each recording unit. Only recording position information is restricted to record management.

However, the number of base image data recorded in one recording unit depends on the content of the received video program or the bit rate of the received data stream. When the input speed is low, two or more base image data may be recorded in one recording unit. On the contrary, when the input speed of the data stream is high, one base image data may not be recorded in one recording unit. You may not.

Therefore, when the shift reproduction operation is performed by using the shift reproduction information generated and recorded by the proposed method as described above, one basis for each recording unit is unconditionally irrespective of the number of the base image data actually recorded in the recording unit. Only the recording position of the image data is searched, and there is a problem that an accurate shift reproduction operation cannot be performed based on the number of recorded base image data, and the recording position of all the base image data recorded in each recording unit is shifted and reproduced. If all of the information is recorded, the recording size of the speed change reproduction information increases so much as described above that the recording capacity of the moving picture data stream is relatively reduced.

Therefore, the present invention was created to solve the above problems, and records the input data stream into a recording unit having a predetermined recording size, and records recording position information of the base image data recorded in the recording unit. The shift reproduction information to be recorded and managed for each record may be selectively generated and recorded according to the number of base image data of the recording unit or the input speed of the data stream, or may be generated and recorded together with identification information for identifying the validity of the shift reproduction information. And a shift playback information recording apparatus and method of a digital data stream for preventing a shift of shift playback information caused in advance when a plurality of base image data is recorded in one recording unit so as to perform an accurate shift playback operation; To provide a playback apparatus and method using the same, Never.

According to an aspect of the present invention, there is provided a method of recording and reproducing information of a digital data stream, the method comprising: dividing an input and recorded digital data stream into basic units of access during reproduction; Confirming a bit rate of the input and recorded digital data stream; And controlling the generation of control information for shift reproduction during reproduction according to the identified bit rate.

In addition, the variable speed reproduction information recording method of the digital data stream according to the present invention comprises the steps of: dividing the input and recorded digital data stream into a basic unit of access during reproduction; Generating and recording control information for shift reproduction during reproduction according to the divided basic unit; Checking a bit rate of the input and recorded digital data stream; And generating and recording information for designating shift reproduction control information to be referred to for shift reproduction according to the identified bit rate.

In addition, the variable speed reproduction information recording apparatus of the digital data stream according to the present invention comprises: recording means for recording an input digital data stream on a recording medium; Confirmation means for confirming a bit rate of the input and recorded digital data stream; And control means for dividing the recorded digital data stream into basic units of access during reproduction, and controlling generation of shift reproduction control information corresponding to the divided basic units according to the identified bit rate. ,

In addition, the variable speed reproduction method of the digital data stream according to the present invention includes a step of confirming designation information of shift reproduction control information to be referred to when a shift reproduction request; And accessing the shift reproduction control information on the basis of the identified designated information.

In addition, the shift playback apparatus of a digital data stream according to the present invention includes: confirmation means for confirming designation information of shift playback control information to be referred to when a shift playback request is made; And control means for accessing the shift reproduction control information based on the identified designated information and controlling the reproduction of the base image data accordingly.

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, an apparatus and method for recording and reproducing information of a digital data stream and a apparatus and method using the same according to the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 1 illustrates the configuration of recording aggregate management information (SOBI: SOB Information) for managing a recording object (SOB: Stream OBject) in which a digital data stream is recorded with temporal continuity. General information (SOB_GI: SOB General Information) in which general information such as a type of recording set (SOB_TY), a recording time (SOB Recording Time), etc. are recorded; A mapping list (MAPL: Mapping List) in which Incremental Application Packet Arrival Time (IAPAT) information is recorded; And an entry point data (EPD) field to be additionally recorded. The general information SOB_GI includes the type (SOB_TY) and the recording time of the record aggregate as shown in FIG. SOB_REC_TM, stream information number (SOB_STI_N), entry point flag (EP_FLAGS), start application packet arrival time (SOB_S_APAT), last application packet arrival time (SOB_E_APAT), start recording unit (SOB_S_SOBU), and mapping list entry number (MAPL_ENT_NS). Information is recorded, and the entry point flag (EP_FLAGS) information is identification information indicating whether entry point data exists in a record collection and whether entry point information is included in each stream. When point data exists, the entry point flag (EP_FLAGS) information is as shown in FIG. Star information is recorded.

In the entry point flag (EP_FLAGS) information, as shown in Fig. 3, identification information (EP marks in stream) indicating whether an entry point is indicated in the stream of the recording aggregate is recorded, and the value of the identification information is recorded. If the value is '0', no entry point is indicated in the stream of the recording aggregate. If the value of the identification information is '1', the entry point is identified.

For reference, even when the value of the identification information is '1', the entry point may not be indicated in the stream.

In addition, when identification information (EP Data exist) indicating whether entry point data (EPD) exists in the recording set is recorded, and the value of the identification information is '0', entry point data for the recording set does not exist. If the value of the identification information is '1', it is possible to identify that entry point data exists. If the value of the identification information is '0', the identification information 'b5' to be continuously recorded thereafter is '0'. 'b2') is not recorded.

In addition, an entry point start location list (EPSLL), an entry point end location list (EPELL), and an entry point start map (EPSM) are recorded in the entry point data EPD. Point Start Map information is recorded that indicates whether the information is Time Based or Sector Based, and if the value of the identification information is '0', When the information is sector based information and the value of the identification information is '1', it is possible to identify that the information is time based information.

Then, the identification information (EPSLL exists) indicating whether the entry point start position list (EPSLL) exists or not is recorded, and if the value of the identification information is '0', the entry point start position list (EPSLL) for the corresponding recording set. Is not present, and if the value of the identification information is '1', it is identified that there is an entry point start position list (EPSLL) for the record set.

In addition, when the identification information (EPELL exists) indicating whether the entry point end position list (EPELL) exists or not is recorded, and the value of the identification information is '0', the entry point end position list (EPELL) for the corresponding recording collection is displayed. Is not present and the value of the identification information is '1', it is possible to identify that there is an entry point end position list (EPELL) for the record set, and also the presentation time information list (PTSL) When the identification information PTSL exists, which indicates whether the information exists, and the value of the identification information is '0', the presentation time information list PTSL for the record collection does not exist and the value of the identification information is '1'. ', It is possible to identify that there is a presentation visual information list (PTSL) for the record set.

Meanwhile, as shown in FIG. 4, the entry point data (EPD) field described above with reference to FIG. 1 includes entry point general information (EP_GI); Entry Point Start Location List (EPSLL); Entry Point End Location List (EPELL); And Presentation Timestamp List (PTSL) information is recorded, wherein each information recorded in the entry point field as well as the entry point data field where such information is recorded is optionally additionally recorded. It may not be recorded accordingly.

In the entry point general information EP_GI, as illustrated in FIG. 5, number of entry points (EP_Ns) and entry point start map (EPSM) information are recorded. The entry point number (EP_Ns) is for ensuring that the recording unit containing the entry point is matched to one entry point start map (EPSM). The entry point start map (ESPM) information is each mapping list entry number. (MAPL_ENT_Ns). For example, as shown in FIG. 6, when each entry point start map (ESPM) information is batch-recorded in a recording size in bytes, the entry point start map of the last byte. In the ESPM, null data '0' may be padded to match the recording size in bytes.

The entry point start map information is entry point flag (EP_FLAGS) information recorded in the general information SOB_GI, in particular, time-based information or sector-based information. If the identification value of the identification information (Time Based) recorded in the entry point flag (EP_FLAGS) is '0', the entry point start map is determined according to the time information. The entry point indicated by is the position information of the specific recording unit indicated on the basis of the sector, and when the identification value of the time information is '0', the entry point indicated by the entry point start map is For example, the position information of the specific recording unit indicated on the basis of time is used.

On the other hand, the entry point start position list EPSLL and the entry point end position list EPELL are recorded and managed on a sector basis or a time basis, respectively, as shown in FIG. Is a location information list for searching for a specific application packet in a random-accessible recording unit, wherein entries recorded in the entry point start position list are mapped one-to-one with a specific application packet of the random-accessible recording unit. The entry point end position list is a position information list for searching for a position at which an application packet of a randomly accessible recording unit is terminated, and entries recorded in the entry point end position list of the last recording unit of the random accessible are: Application packet Mapped one-to-one with

On the other hand, as shown in Fig. 7A, a sector offset (SOFF: Sector Offset) is included in the entry point start position list (EPSLL) and the entry point end position list (EPELL) recorded and managed on a sector basis. ) And an application packet number AP_NO, in which a sector offset SOFF for the entry point start position list EPSLL is a sector offset number in a recording unit mapped to an entry recorded in the entry point start position list. (SOFF # n), the sector offset number, for example, SOFF # 0 represents the first sector (Sector # 0) in a specific recording unit, as shown in Figure 8, entry point start map If the fourth entry of (EPSM) is recorded as '1' and the sector offset number is SOFF # 3, the recording unit indicated by the fourth entry of the entry point start map (EPSM) is SOBU # 4. The sector indicated by the sector offset number becomes Sector # 3 having the first sector (Sector # 0) of SOBU # 4 and three sector offset values.

In addition, the sector offset (SOFF) for the entry point end position list (EPELL) is also denoted by the sector offset number (SOFF # n) in the mapped recording unit recorded in the entry point start position list entry. For example, as shown in FIG. 8, if the fourth entry of the entry point start map (EPSM) is recorded as '1' and the sector offset number is SOFF # 66, the entry point start map (EPSM) is displayed. The recording unit indicated by is SOBU # 4, and the sector indicated by the sector offset number is a sector of the recording position having the first sector (Sector # 0) and 66 sector offset values of SOBU # 4, that is, Assuming that one recording unit is composed of 32 sector sizes, the first sector (Sector # 0) of SOBU # 4 and Sector # 2 in SOBU # 6 which is a recording position having 66 sector offset values.

On the other hand, the application number (AP_NO) shown in FIG. 7 is an information packet indicating a specific application packet in the sector indicated by the information (EPSM, EPSLL, EPELL), that is, an application packet that is a random access data packet, For example, as a number (AP_NO #n: n = 1,2,3 ..) of an application packet having a recording size of 192 bytes, as described above with reference to FIG. 8, it indicates a specific application packet in the corresponding sector searched. Done.

That is, the application number of the entry point start position list (EPSLL), for example, AP_NO # 3, becomes the position information corresponding to AP # 3 in the searched Sector # 3, and the application number of the entry point end position list (EPELL). , AP_NO # 8 is location information corresponding to AP # 8 in the searched another Sector # 2.

 On the other hand, as shown in Fig. 7 (b), the entry point application packet arrival time (EP_APAT) in the entry point start position list (EPSLL) and entry point end position list (EPELL) recorded and managed on a time basis (EP Based) ) Information is recorded, and the entry point application packet arrival time (EP_APAT) information is packet arrival time information of a specific application packet that can be randomly accessed, and the information (EPSM, EPSLL, EPELL) is shown in FIG. ) Is time information corresponding to a specific application packet in the recording units SOBU # 4 and SOBU # 6, that is, the recording positions of AP # 3 and AP # 8. Accordingly, it is possible to search for an application packet that can be randomly accessed without searching for specific sector positions in the searched recording units SOBU # 4 and SOBU # 6.

The presentation time information list PTSL shown in FIG. 9 is information for listing time information for all entry points of a record collection, and all entry points are recorded in the presentation time information list PTSL. Correspond to entries one-to-one.

Hereinafter, a generation recording apparatus and method for shift reproducing information recorded as described above will be described in detail with reference to the accompanying drawings.

First, FIG. 10 shows an overall configuration of an optical disk apparatus to which the variable speed reproduction information recording and reproducing method of a digital data stream according to the present invention is applied. The optical disk recording or reading data of an optical disk (OD) such as a DVD is shown. Pickup 10; An analog signal processor 20 for signal processing an analog signal recorded or read by the optical pickup 10; A digital signal processor (30) for digitally processing the reproduction signal of the optical disc reproduced by the optical pickup and analog signal processor or the received video and audio signal into an optical disc recording signal; An A / V signal processor 40 for processing the digital data output from the digital signal processor or an input signal received from the outside into a video and audio signal; A controller (50) for generating, recording and searching / controlling navigation information including operations of the signal processing units and shift reproduction information; And a memory 60 for storing data necessary for the control operation of the control unit, wherein the shift reproduction information of the digital data stream according to the present invention is a shift reproduction information recording operation in the optical disc device configured as described above. An embodiment of the recording method will be described in detail below with reference to FIG. 11. First, a digital data stream corresponding to an audio and video signal is passed through the A / V signal processor 40. 30, the controller 50 controls the digital signal processor 30 and the optical pickup 20 to record the input digital data stream having a predetermined recording size on the optical disc OD. In the case of partition recording (S11) in a unit SOBU, as shown in FIG. 12, the application is transmitted and included in units of sectors or packs of the digital data stream. Search for the Long Header Flag recorded in the Application Header field, and if the value of the found Long Header Flag is set to '1', the value of the maximum bit rate (Max_bitrate) that is additionally recorded additionally. Check (S12).

The maximum bit rate value is information indicating an input speed of the digital data stream to be input and recorded. As described above, a plurality of base images are recorded in one recording unit according to the maximum bit rate value, that is, the input speed of the digital data stream. The data may be recorded or recorded, or even one base image data may not be recorded, so that the identified maximum bit rate is lower than the reference bit rate at which one base image data is included and recorded in one recording unit. In the case of the low bit rate (S13), it is determined that a plurality of base image data is included and recorded in one recording unit.

Therefore, as described above, the entry point data (EPD) information for generating and recording only one base image data recording position for each recording unit, that is, only one entry point for each recording unit, becomes inaccurate. The generation record of the entry point data corresponding to the unit is omitted (S14).

On the other hand, when the checked maximum bit rate is higher than or equal to the reference bit rate at which one base image data is recorded in one recording unit or at the same bit rate, the maximum one bit rate is stored in the recording unit. Since only the base image data can be recorded and recorded, at this time, entry point data corresponding to the recording unit is normally generated and recorded (S15). The creation record of the entry point data is extended by the application header shown in FIG. Read the entry point start and end position information (AU_Start, AU_End: Access Unit Start, Access Unit End) recorded in the (Application Header Extension) field, and read the corresponding application packet, that is, the random access of the start application packet and the last application packet. Entry point start position list (EPS) showing the recording position shown in FIG. LL) and entry point end position list (EPELL), and the above operation is repeated until the recording operation ends (S16).

For reference, the entry point start position list (EPSLL) and entry point end position list (EPELL) information are recorded as entry point packet arrival time (EP_APAT) information based on time, as shown in FIG. In this case, the time information (APAT) of the application packet corresponding to the entry point start and end position information (AU_Start, AU_End) is generated and recorded as the entry point packet arrival time (EP_APAT) information.

On the other hand, another embodiment of a method for recording shift reproduction information of a digital data stream according to the present invention will be described in detail with reference to FIG.

First, as described above, when the digital data stream corresponding to the audio and video signal is input to the digital signal processor 30 through the A / V signal processor 40, the controller 50 is digital. The signal processing unit 30 and the optical pickup 20 are operated to partition and record the input digital data stream into a recording unit SOBU having a predetermined recording size on the optical disc OD. The number of base image data to be dividedly recorded in the recording unit is counted (S22).

The operation of counting the number of the base image data is to directly count the number of base image data recorded in the recording unit, and when a plurality of base image data is recorded in one recording unit, as described above. Since one base image data recording position for each recording unit, that is, entry point data (EPD) information for recording only one entry point for each recording unit, becomes inaccurate. In this case, the corresponding recording unit is generated and recorded. In addition to the entry point data, identification information (IDX Flag: Index Flag) indicating that the entry point data is inaccurately generated and recorded (S24). The identification information (IDX Flag) is shown in FIG. Similarly, by using the entry point flag (EP_FLAG) spare area (Reserved) of the record aggregation general information (SOB_GI), It can be recorded.

That is, when the value of the identification information IDX Flag additionally recorded on the entry point flag EP_FLAG of the recording aggregate general information SOB_GI is '1', the information of the entry point data corresponding to each recording unit is incorrect. When the identification information IDX Flag has a value of '0', it is possible to identify that the information of the entry point data corresponding to each recording unit is correct.

Therefore, according to the bit rate of the input data stream or the number of base image data recorded in one recording unit, entry point data is selectively generated or accuracy of the generated entry point data is determined. By additionally recording the identification information IDX Flag, the inaccuracy of the entry point data for recording only one entry point for each recording unit can be identified in advance, thereby preventing errors in shift reproduction.

As described above, the variable speed reproduction method of the digital data stream according to the present invention, which reads and reproduces only the base image data randomly accessed during the speed change reproduction using the recorded shift reproduction information, will be described in detail with reference to the accompanying drawings. do.

First, FIG. 15 is an operation flowchart showing an embodiment of a shift reproducing method of a digital data stream according to the present invention. In particular, an operation of a reproducing method corresponding to the shift reproducing information recording method described above with reference to FIG. As a flowchart, first, the control unit 50 changes the data reading position of the optical pickup 10 to a navigation information recording area in which the speed changing reproduction information is recorded when a shift reproduction operation is requested (S30) by a user's input key. Search for entry point data recorded in the navigation information recording area, or when the optical disc is first inserted and seated in the optical disk device, search for entry point data recorded in the navigation information recording area in advance to obtain the memory ( Entry point data (EPD) stored in advance in the memory 60 and stored in the memory 60 upon request for shift reproduction. In this case, it is determined whether or not the searched entry point data exists, that is, whether or not the entry point data generated and recorded corresponding to each recording unit is generated and recorded, and when the determination result entry point data is recorded, It is determined that only one base image data is recorded and recorded in one recording unit, and the recording position where the base image data is recorded by reading the shift reproduction information (ESPM, EPSLL, EPELL, or EP_APAT) recorded in the entry point data. That is, when the specific application packet AP is searched and reproduced (S33) as described above with reference to FIG. 8, while the entry point data is not recorded as a result of the determination, a plurality of base images are stored in one recording unit. It is determined that the data is recorded, and the data stream in the recording unit is directly In step S34, the recording position of all the recorded base image data is searched and reproduced (S35), and the above operation is repeated until the requested shift reproduction operation ends (S36).

16 is an operational flowchart showing another embodiment of the variable speed reproduction method of the digital data stream according to the present invention, in particular, a reproduction method corresponding to the variable speed reproduction information recording method described with reference to FIG. As described above, as described above, when the shift playback operation is requested (S40) by the user's input key, the controller 50 records the data read position of the optical pickup 10 in which the shift playback information is recorded. Change the position to the navigation information recording area, retrieve the entry point data recorded in the navigation information recording area, or when the optical disc is first inserted and seated in the optical disk device, advance the entry point data recorded in the navigation information recording area. Searched in the memory 60 and stored in advance in the memory 60 and stored in the memory 60 upon request for shift reproduction. An entry point data (EPD) is searched for, and identification information indicating whether the retrieved entry point data is correct, that is, an identification additionally recorded in an entry point flag (EP_FLAGS) reserved area of the general information SOB_GI. The identification value of the information IDX Flag is checked (S41).

If the identification result is '0', it is determined that at least one base image data is included and recorded in the recording unit in which the entry point data is generated and recorded, and the shift reproduction information (ESPM) recorded in the entry point data is determined. EPSLL, EPELL or EP_APAT) is read to search and reproduce (S45) the recording position where the base image data is recorded, that is, the application packet (AP), as described above with reference to FIG. If it is '1', it is determined that a plurality of base image data is recorded in the recording unit, that is, the entry point data is determined to be inaccurate, and the data stream in the recording unit is read directly (S43), thereby recording on the recording unit. Search and play the recording positions of all the received base image data (S44), and then perform the above operation until the requested shift reproduction operation ends (S46). Repeat.

Therefore, according to whether the entry point data is recorded or the identification value of the identification information indicating the accuracy of the entry point data, all of the base image data of the recording unit are directly searched and reproduced, thereby performing a more accurate shift reproduction operation. .

The apparatus and method for recording and reproducing data of a digital data stream according to the present invention, and the apparatus and method using the same, divide and record an input data stream into 32 sectors, for example, based on a predetermined recording size. The speed change reproducing information which records and records the recording position information of the base image data recorded in the recording unit for each recording unit is divided into the number of the base image data of the recording unit or the input speed of the data stream. Shift generation information caused by recording a plurality of base image data in one recording unit by selectively generating and recording the recording information or by additionally recording identification information for identifying whether the shift reproduction information is accurately generated. Errors in advance, and more accurate shift playback operation is achieved So that will be very useful inventions.

Claims (15)

Dividing the input and recorded digital data stream into basic units of access during reproduction; Confirming a bit rate of the input and recorded digital data stream; And And three steps of controlling generation of control information for shift reproduction at the time of reproduction in accordance with the identified bit rate. The method of claim 1, And said step 2 is confirmed on the basis of bit rate information included on said input and recorded digital data stream. The method of claim 1, The step 2, the shift playback information recording method of the digital data stream, characterized in that the check based on the number of predetermined video data contained in the divided basic unit. Dividing the input and recorded digital data stream into basic units of access during reproduction; Generating and recording control information for shift reproduction during reproduction according to the divided basic unit; Checking a bit rate of the input and recorded digital data stream; And And generating and recording information for designating shift reproduction control information to be referred to for shift reproduction according to the identified bit rate. The method of claim 4, wherein And said step 2 is confirmed on the basis of bit rate information included on said input and recorded digital data stream. The method of claim 4, wherein The step 2, the shift reproduction information recording method of the digital data stream, characterized in that confirmed based on the number of the base image data contained in the divided basic unit. The method of claim 4, wherein The designation information is designation information for designating, based on which of the base image data information recorded in the partitioned basic unit and the shift playback control information generated and recorded corresponding to the partitioned basic unit, at the time of shift reproduction. The variable speed reproduction information recording method of a digital data stream, characterized in that. Recording means for recording an input digital data stream on a recording medium; Confirmation means for confirming a bit rate of the input and recorded digital data stream; And And controlling means for dividing the recorded digital data stream into basic units of access during reproduction, and controlling generation of shift reproduction control information corresponding to the divided basic units according to the identified bit rate. A variable speed reproduction information recording apparatus for a digital data stream. The method of claim 8, And said confirming means comprises detecting means for detecting bit rate information contained on the digital data stream to be input and recorded. The method of claim 8, And said confirming means comprises a base image data detecting means for detecting and counting the number of base image data contained in said divided basic unit. The method of claim 8, The control means selects, based on the identified bit rate, whether the base image data information recorded in the divided basic unit and the shifted reproduction information generated corresponding to the divided basic unit are to be selected. And shifting and reproducing information recording apparatus for a digital data stream, comprising selecting means for designating. A first step of confirming designation information of shift reproduction control information to be referred to when a shift reproduction request is made; And And shifting the shift reproduction control information on the basis of the identified designated information. The method of claim 12, The designation information may be designation information for designating which of the basis image data information recorded in the divided basic unit and the shifting reproduction control information generated and recorded corresponding to the divided basic unit are to be referenced. Variable speed playback device for digital data streams. Confirmation means for confirming specified information of shift reproduction control information to be referred to when a shift reproduction request is made; And And control means for accessing the shift reproduction control information based on the identified designated information and controlling the reproduction of the base image data accordingly. The method of claim 14, The designation information may be designation information for designating which of the basis image data information recorded in the divided basic unit and the shifting reproduction control information generated and recorded corresponding to the divided basic unit are to be referenced. A variable speed reproduction device for digital data streams.

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