JP2007059011A - Data recording method, recording medium, reproducing device, and recording/reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a user cannot recognize data contents of an incompatible format when a recording medium recording data of a plurality of formats is reproduced in a reproducing device compatible with only the reproduction of a specific format. <P>SOLUTION: In the data recording method for recording data in a recording medium, the data have at least first and second data groups, the first and second data groups are recorded on the recording medium with different formats, and the presence of the second data on the recording medium can be recognized, or the recording contents of the second recording group can be inferred by the recording contents of the first data group. A flag or a predetermined file is added to the first data group, and the presence of the second data group is discriminated using this. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a data recording method for recording data on a recording medium, a recording medium on which data is recorded using these methods, a reproducing device for reproducing data from these recording media, and a recording / reproducing for recording on the recording medium It relates to the device.

  A technique for managing recording data in a plurality of formats on the same optical disc has been proposed (see, for example, Patent Document 1).

JP-A-2002-190181

  By the way, AV equipment such as players and recorders using an optical disk typified by a DVD as a recording medium is rapidly spreading. In DVDs used in these players and recorders, AV data is compressed by a high-efficiency encoding technique and recorded on a disc in accordance with a predetermined format together with its management information, in order to handle these data File systems are also defined.

  In the DVD world alone, there are a plurality of data formats such as a DVD video format, a DVD video recording format, and a DVD audio format, and the attributes of data to be handled are also defined. For example, in the DVD video format, video data up to a resolution of 720 horizontal pixels × vertical 480 lines (in the case of NTSC) or 720 horizontal pixels × vertical 576 lines (in the case of PAL) (hereinafter referred to as “SD content”). It can be handled.

On the other hand, when a next-generation optical disc having a larger capacity than the current DVD is considered, it is possible to handle even higher resolution video data (hereinafter referred to as HD content), for example, horizontal 1920 pixels × vertical 1080 lines. It is conceivable that the file system may be different from the DVD.
The above-mentioned patent document 1 describes a technique of recording recording data of different formats on the same recording medium and managing the whole using comprehensive management information. However, the recording data in each format is recorded separately, and there is no correlation between the recording contents. Further, in the case where data in a plurality of formats differing to the file system as described above is recorded on the same recording medium, no particular consideration has been given to the structure of the data. For example, in a playback apparatus that supports only playback of a specific format, when a recording medium on which data in a plurality of formats is recorded is played back, the user cannot recognize the data content of the unsupported format. There was a problem.
The present invention has been made in view of the above points, and an object of the present invention is to provide a data recording method that considers the relevance of data in a method for recording data in a plurality of formats on the same recording medium. is there. Further, for example, considering the case where data in a plurality of formats different to the file system is recorded on the same recording medium, a data recording method, a recording medium using these methods, and a playback device for these recording media, A recording / reproducing apparatus is provided.

To achieve the above object, in the present invention, in a data recording method for recording data on a recording medium, the data has at least a first data group and a second data group, and the first and second data Each group is configured to be recorded on a recording medium in a different recording format, and the recorded content of the first data group is one that can recognize the presence of the second data group on the recording medium, or It is assumed that the recorded contents of the second data group can be inferred.
In the data recording method according to the present invention, a flag or a predetermined file is added to the first data group, and the presence of the second data group can be determined using this flag.
In the recording method according to the present invention, the recording areas of the first data group and the second data group are separately secured as fixed areas on the disc.
Further, the reproducing apparatus and the recording / reproducing apparatus according to the present invention can reproduce the second data group by detecting a flag in the first data group or an arbitrary file in the initial determination. To do.

  According to the present invention, it is possible to provide a recording method, a recording medium, a reproducing apparatus, and a recording / reproducing apparatus with improved usability.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram schematically showing a state in which an SD content in a DVD video format and an HD content in another format are recorded on an optical disc in the data recording method according to the present invention. In the figure, 100 is an optical disc, 101 is a lead-in area, 102 is an SD content area, 103 is an HD content area, and 104 is a lead-out area.

  On the optical disc, data is basically recorded in a spiral shape from the inner periphery to the outer periphery of the disc. In FIG. 1, each recording area is shown as being concentrically divided. This means that the recording content is changed for each predetermined area in one volume space from the inner circumference to the outer circumference. ing.

  The lead-in area 101 and the lead-out area 104 are areas necessary for physical address management of actual data, and are recorded on the innermost and outermost circumferences of the disc. In the SD content area 101, SD content conforming to the DVD video format as shown in FIG. 2 and its management information are recorded. FIG. 2 shows a directory structure of recorded data configured in the SD content area 101, and each data is handled as an individual file on a predetermined file system. In FIG. 2, a subdirectory 201 for DVD video format is arranged under a root directory 200, and all management information files and AV data files as the DVD video format are placed under the subdirectory 201. The video manager information 202 includes integrated management information for reproducing recorded AV data, and includes, for example, reproduction order information and AV data attribute information. A video manager menu video object set (video manager menu VOBS) 203 is an AV data file for displaying an integrated menu for playback in a DVD player, and has stream data in the same format as an AV data file described later. ing. The video manager information backup 204 has the same contents as the video manager information 202 and is used for backup when the video manager information 202 cannot be read. In the video title set information 205, information on AV data managed for each of a plurality of units is written, and in the video title set menu VOBS 206, AV data for displaying a menu for each of the plurality of units in a DVD player is described later. Is written as stream data in the same format as the AV data file. The video title set title VOBS 207 is stream data serving as main SD content, and data search information and the like are also multiplexed as AV data. The video title set information backup 208 has the same content as the video title set information 205 and is used for backup when the video title set information 205 cannot be read.

  On the other hand, HD content and its management information are recorded in the HD content area 103 in a data system different from the SD content area in a data format different from the DVD video format. Although no particular details are given here, the HD content and its management information are recorded at least in accordance with a predetermined format.

  A case where the optical disc 100 is reproduced by a normal DVD player will be described below. The DVD player reproduces only data conforming to the DVD video format included in the SD content area 102. At startup, the video manager VOBS 203 is normally designated as the initial playback program, and a menu screen showing the contents of the recorded data is displayed.

  FIG. 3 shows an example of the video manager VOBS 203, that is, an example of a menu screen. In the case of the present embodiment, the menu screen only suggests that content that cannot be reproduced by the DVD player, that is, HD content is recorded on the disc. In this case, since the display other than the menu screen is not performed, the portion corresponding to the video title set VOBS 207 does not include valid actual data. Here, HD content is mainly used as data on the disc, but even when the user uses a player that does not support HD content by recording the SD content together with the data recording method in the present embodiment. Therefore, it is possible to know the existence of HD content on the disc, and to avoid user confusion.

  FIG. 4 is a diagram showing a second embodiment of the data recording method according to the present invention. The basic data recording method is the same as that in the first embodiment, but the contents of the video manager VOBS 203, that is, the menu screen are different. In the present embodiment, up to the content of the HD content is displayed as the menu screen. The portion corresponding to the video title set VOBS 207 does not include valid actual data, as in the first embodiment. By applying the data recording method according to the present embodiment, HD content cannot be reproduced as a DVD player, but the user can recognize the content of HD content by displaying the menu screen.

  FIG. 5 is a diagram showing a third embodiment of the data recording method according to the present invention. The basic data recording method is the same as in the first and second embodiments, but the contents of the recorded data are different. In FIG. 5, thumbnails of respective titles are displayed as the video manager VOBS 203, that is, a menu screen in the same manner as a normal movie. The user can select a desired title, and the content corresponding to the video title set menu VOBS 206 or the video title set 207 is reproduced according to the determination of each thumbnail. However, the contents of these SD contents are recorded as a digest version or the like as a format that can be viewed on a DVD player by down-converting the HD contents. In other words, they are not limited to moving images, but can also be a series of still images in which scenes characteristic of HD content are collected, that is, only so-called MPEG I pictures. By applying the data recording method according to the present embodiment, a user using a DVD player can recognize the existence of HD content on the disc, and also view SD content such as a digest version related to the HD content. be able to.

Next, a data recording method and a reproducing apparatus according to the present invention will be described as a fourth embodiment with reference to the drawings.
FIG. 6 is a diagram showing a data recording method according to the present embodiment, and the basic data recording method is the same as that in the first to third embodiments. What is characteristic in the present embodiment is that a predetermined flag is added to the video manager information 202 as shown in FIG. Reference numeral 601 denotes an example of the contents of the video manager information 202 defined in the DVD video format. The video manager information management table (VMGI_MAT), title search pointer (TT_SRPT), video manager menu program chain information unit table (VMGM_PGCI_UT), video manager It consists of a menu cell address table (VMGM_C_ADT), a video manager menu video object unit address map (VMGM_VOBU_ADMAP), and the like. Here, for example, one byte of the unused field of VMGI_MAT is used as the determination flag 602. Since the unused field is normally set to 00h, for example, a determination flag 602 is set to 01h to indicate that HD content other than SD content in the DVD video format is included on the disc.

  Here, a reproducing apparatus for reproducing a recording medium using the above-described data recording method will be described. FIG. 7 is a block diagram showing an example of a reproducing apparatus according to the present invention, and shows a reproducing apparatus using an optical disk as a recording medium. Reference numeral 700 denotes a recording / reproducing apparatus, 701 an optical disc, 702 a user I / F, 703 a control unit, 704 a memory, 705 a track buffer, 706 a drive, 707 a pickup, 708 a decoder unit, and 709 an output unit. .

  When starting playback, the user inserts the optical disc 701 including the SD content and HD content recorded by the above-described recording method into the playback device 700, and issues a playback instruction using the remote controller or the playback device main body key. However, when the initial operation is set as the optical disc 701, it is not necessary to give a reproduction instruction. The control unit 703 starts playback of the optical disc 701 in response to a user instruction input input via the user I / F 702 or a set initial operation.

  For example, when the above-described determination flag 602 is not set (00h), the control unit 703 interprets data on the optical disc 701 as data in a normal DVD video format and performs a reproduction operation. That is, when reproducing a moving image or the like, the stream data is read from the arbitrary data position in the SD content area 102 of the optical disc 701 by the drive 706 via the pickup 707 and temporarily stored in the track buffer 705. The difference between the transfer rate of the drive 706 and the encoding rate of the stream data is absorbed, the stream data is read from the track buffer 705, the image data and the audio data are separated and decoded by the decoder unit 708, and the output unit 709 appropriately Output in a simple signal format.

  The control unit 703 controls the above-described units by loading the contents from the program area of the memory 704. As a reproduction operation, the video manager starts from the SD content area 102 of the optical disc 701 before reading the stream data. Management information including the information 202 is read by the drive 706, and the contents are expanded in a predetermined area of the memory 704. All instructions input by the operator via the user I / F 702 are interpreted by the control unit 703, and the above-described reproduction operation is performed in accordance with the management information developed in the memory 704.

  If the above-described determination flag 602 is set (01h), the control unit 703 interprets that an HD content different from the DVD video format is recorded on the optical disc 701 and performs a reproduction operation. That is, the control unit 703 controls the data reading from the optical disc 701 to be performed from the HD content area 103, and performs reproduction signal processing performed by the drive 706, reading from the track buffer 705, decoding operation by the decoder unit 708, and the like. Control is performed so that the playback operation is performed in a format corresponding to the HD content, including recognition of the file system.

  The above operation flow will be described more simply with reference to FIG. When the reproduction operation is started (S801), management information as a DVD video format is first developed as described above (S802). Here, the determination flag in VMGI_MAT is checked (S803). If the determination flag is 00h, playback is performed as a DVD video format (S805). If the determination flag is 01h, HD content is included, and accordingly The HD content is played back (S804), and the playback operation is terminated (S806).

  As described above, according to the present embodiment, in an optical disc that includes data of different formats, data to be preferentially reproduced is specified by setting a predetermined flag in the data to be read at initial startup. be able to. That is, when a playback device capable of playing back HD content plays back a recording medium containing SD content and HD content, the playback of the HD content can be automatically started.

Next, a data recording method and a reproducing apparatus according to the present invention will be described as a fifth embodiment with reference to the drawings.
FIG. 9 is a diagram showing a data recording method according to the present embodiment, and the basic data recording method is the same as in the first to fourth embodiments. What is characteristic in the present embodiment is that a determination file 901 is added as shown in FIG. The name of the determination file 901, the position in the directory, etc. are not particularly limited, and there is no problem as long as it can be identified for determination.
Here, a reproducing apparatus for reproducing a recording medium using such a data recording method will be described. Since the basic reproduction operation is the same as that in the above-described fourth embodiment, the block diagram is shown in FIG.

  At the start of reproduction, the control unit 703 confirms the existence of the determination file 901 prior to the development of management information in the SD content area 102 in the DVD video format. When the determination file 901 exists, the control unit 703 interprets that the HD content different from the DVD video format is recorded on the optical disc 701 and performs the reproduction operation. That is, the control unit 703 controls the data reading from the optical disc 701 to be performed from the HD content area 103, and performs reproduction signal processing performed by the drive 706, reading from the track buffer 705, decoding operation by the decoder unit 708, and the like. Control is performed so that the playback operation is performed in a format corresponding to the HD content, including recognition of the file system.

  This operation flow will be described with reference to FIG. When the reproduction operation is started (S1001), the existence of the determination file 901 is first checked (S1002). When the determination file 901 does not exist, the management information as the DVD video format recorded on the optical disc 701 is expanded (S1004), and is reproduced as the DVD video format (S1005). If the determination flag 901 is present, the optical disk 701 is assumed to contain HD content, and the HD content is reproduced accordingly (S1003), and the reproduction operation is terminated (S1006).

  As described above, according to the present embodiment, by recording a predetermined file used for determination at the time of initial startup on an optical disc that includes data of different formats, as in the case of the fourth embodiment, priority is given. The data to be played can be specified. That is, when a playback device capable of playing back HD content plays back a recording medium containing SD content and HD content, the playback of the HD content can be automatically started.

Next, a recording / reproducing apparatus according to the present invention will be described as a sixth embodiment with reference to the drawings.
FIG. 11 is a block diagram showing an example of a recording / reproducing apparatus according to this embodiment, and shows a recording / reproducing apparatus using an optical disk as a recording medium. 1100 is a recording / reproducing apparatus, 1101 is an optical disk, 1102 is a user I / F, 1103 is a control unit, 1104 is a memory, 1105 is a track buffer, 1106 is a drive, 1107 is a pickup, 1108 is an encoder / decoder unit, and 1109 is an input unit Reference numeral 1110 denotes an output unit. Note that the operation during reproduction is the same as in the case of the fourth to fifth embodiments described above, and a detailed description thereof will be omitted.

  The feature of the recording / reproducing apparatus according to the present embodiment is that data of different formats, SD content and HD content, can be recorded in a predetermined area of the optical disc as shown in FIG. Hereinafter, the operation at the time of recording when HD content data is input to the input unit 1109 will be described.

  The image data and audio data input by the input unit 1109 are encoded by the encoder / decoder unit 1108 using a predetermined encoding method for HD content, and the information amount is compressed and sequentially multiplexed. The multiplexed stream data is temporarily stored in the track buffer 1105 in order to absorb the difference between the encoding rate and the transfer rate of the drive 1106, and sequentially added to the HD content area 103 of the optical disc 1101 by the drive 1106 every predetermined unit. Is done. The control unit 1103 performs the control operation of each unit based on an instruction input from the operator via the user I / F 1102. The control content can be appropriately read and written by reading / writing the program area of the memory 1104. Loaded. Also, at the time of recording, predetermined management information is once expanded in a predetermined area of the memory 1104 and updated together with the recording of the stream data. Is done.

  Next, recording on the SD content area 102 of the optical disc 1101 will be described. The control unit 1103 automatically reads data from the HD content area 103 of the optical disc 1101 by, for example, inputting an instruction from the operator via the user I / F 1102 or determining when the recording / reproducing apparatus is not used. . The read HD content is re-encoded into SD content in the encoder / decoder unit 1108, and is recorded in the SD content area 102 of the optical disc 1101 by the drive 1106 as in the case of HD content. Also, management information for SD content is expanded in the memory 1104, and finally updated and recorded in the SD content area 102 of the optical disc 1101.

  FIG. 12 specifically shows the configuration of the encoder / decoder unit 1108 in this case. 1201 is an output terminal, 1202 is an input terminal, 1203 is a decode circuit, 1204 is a down-conversion circuit, 1205 is a switch, An encoding circuit, 1207 is an input terminal, and 1208 is an output terminal.

The HD content read from the optical disc 1101 is decoded by the decoding circuit 1108 via the input terminal 1202 by a predetermined method, and down-converted into data for SD content by the down-conversion circuit 1204. The down-converted data is input to the encoding circuit 1206 via the switch 1205, encoded by a predetermined encoding method, and output from the output terminal 1201. A part of the information decoded by the decoding circuit 1108 may be notified to the encoding circuit 1206 in order to improve the encoding efficiency in the encoding circuit 1206. The control of these units is all performed based on the control of the control unit 1103.
As described above, according to the configuration of the recording / reproducing apparatus according to the present embodiment, data in different formats of SD content and HD content can be recorded in a predetermined area of the optical disc.

Next, a recording / reproducing apparatus according to the present invention will be described as a seventh embodiment with reference to the drawings.
FIG. 12 is a block diagram showing an example of a recording / reproducing apparatus according to the present embodiment. FIG. 12 shows a recording / reproducing apparatus using an optical disk as a recording medium, as in the sixth embodiment. Reference numeral 1301 denotes a control unit, 1302 denotes an encoder unit, and 1303 denotes a down-conversion circuit. In addition, about the part which overlaps in FIG. 11, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As in the sixth embodiment, the feature of this embodiment is that data of different formats, SD content and HD content, can be recorded in a predetermined area of the optical disc as shown in FIG. It is a further feature that the contents are simultaneously performed. Hereinafter, as in the sixth embodiment, the operation at the time of recording when HD content data is input to the input unit 1109 will be described.

  The operation for recording the HD content data input from the input unit 1109 in the HD content area 103 of the optical disc 1101 is the same as described above. Here, the HD content data input from the input unit 1109 is down-converted into SD content data in the down-conversion circuit 1303. The down-converted data is encoded by the encoder unit 1302 by a predetermined encoding method, and is recorded in the SD content area 102 of the optical disc 1101 by the drive 1106 via the track buffer 1105. Also, management information for SD content is expanded in the memory 1104, and finally updated and recorded in the SD content area 102 of the optical disc 1101. Parallel recording of HD content and SD content is performed in a time-sharing manner using a track buffer 1105.

  As described above, according to the configuration of the recording / reproducing apparatus according to the present embodiment, it is possible to simultaneously record data in different formats of SD content and HD content in a predetermined area of the optical disc in parallel.

  In all of the embodiments described above, the case where the recording layer of the optical disc is a single layer has been described. However, there is no problem even if the recording layer is a multilayer, and any recording format may be used as long as data of different formats can be recorded in a predetermined area. The invention is applicable. In the above embodiment, the case where the file system is different for the SD content and the HD content has been described. However, there is no particular problem even if recording is performed using the same file system. In the sixth and seventh embodiments, the SD content is the same as the HD content and only the resolution and the recording format are different. However, as in the data recording methods described in the first and second embodiments, The content of the SD content can be recorded simply as the content of the HD content can be inferred.

  According to the data recording method of the above embodiment, even when a plurality of data of different formats are recorded, it is possible to infer the existence of other data or the recorded contents from one data. In other words, for example, HD content data in a predetermined format in which SD content in a DVD video format is recorded as a first data group on a disc and the file system is different from the first data group as a second data group. Is configured to record. The existing DVD player has only the reproduction function of the first data group, but the recorded content of the first data group is such that the recorded content of the second data group can be inferred. When the data group (DVD video format) is reproduced, the user can recognize the presence or content of the second data group (HD content).

  Further, according to the reproducing apparatus and the recording / reproducing apparatus according to the present invention, both the first and second data groups have a function capable of reproducing, but when a disc having the above-described configuration is reproduced, By detecting a flag in the first data group or an arbitrary file in the initial determination, the second data group can be preferentially reproduced.

The schematic diagram which shows the recording area on the disc in the data recording method by this invention. The figure which shows the file structure in a DVD video format. The figure which shows an example of the menu display by the 1st Embodiment of this invention. The figure which shows an example of the menu display by the 2nd Embodiment of this invention. The figure which shows an example of the menu display by the 3rd Embodiment of this invention. The figure which shows an example of the flag setting for determination in SD content. The block diagram of the reproducing | regenerating apparatus by this invention. The figure which shows the flow of the reproduction | regeneration operation | movement using the flag for determination. The figure which shows an example of the file setting for a determination in SD content. The figure which shows the flow of reproduction | regeneration operation | movement using the file for determination. The block diagram which shows an example of the recording / reproducing apparatus by this invention. The figure which shows the structure of an encoder / decoder part. The figure which shows another example of the recording / reproducing apparatus by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Optical disk 101 ... Lead-in area 102 ... SD content area 103 ... HD content area 104 ... Lead-out area 202 ... Video manager information 203 ... Video manager menu VOBS
204 ... Video manager information backup 205 ... Video title set information 206 ... Video title set menu VOBS
207… Video title set title VOBS
208 ... Video title set information backup 601 ... Video manager information content 602 ... Determination flag 700 ... Playback apparatus 701, 1101 ... Optical disk 702, 1102 ... User I / F
703, 1103, 1301... Control unit 704, 1104... Memory 705, 1105... Track buffer 706, 1106... Drive 707, 1107. ... Encoder / decoder unit 1109 ... Input units 1201, 1208 ... Output terminals 1202, 1207 ... Input terminal 1203 ... Decoder circuits 1204, 1303 ... Down-conversion circuit 1205 ... Encoding circuit 1206 ... Switch 1302 ... Encoder unit

Claims (13)

A data recording method for recording data on a recording medium,
The data has at least a first data group and a second data group, the first data group is recorded on the recording medium in accordance with a first recording format, and the second data group is Configured to be recorded on the recording medium in accordance with a second recording format different from the first recording format,
The recorded content of the first data group is such that the presence of the second data group on the recording medium can be recognized, or the recorded content of the second data group can be inferred. A data recording method characterized by the above. The data recording method according to claim 1,
The first data group includes at least video data,
The display content of the video data indicates to the user the existence of the second data group. The data recording method according to claim 1,
The recorded content of the first data group is composed of a digest of the recorded content of the second data group,
The data recording method according to claim 1, wherein the first data group includes menu information of the digest. In the data recording method of Claim 2 or Claim 3,
The data recording method, wherein the first data group is configured to set a predetermined flag in the management information in the first recording format. In the data recording method of Claim 2 or Claim 3,
The data recording method according to claim 1, wherein the first data group includes a predetermined file that is not defined in the first recording format.   6. A recording medium on which data is recorded by using the data recording method according to claim 1. The recording medium according to claim 6,
The recording medium has a disk shape,
A recording medium characterized in that a recording area of the first data group and a recording area of the second data group are secured as fixed areas on the recording medium. In a playback device for playing back data from a recording medium,
The data on the recording medium has at least a first data group and a second data group, and the first data group is recorded on the recording medium according to a first recording format, and the second data group The data group is recorded on the recording medium in accordance with a second recording format different from the first recording format,
In the first data group, a predetermined flag is set in the management information in the first recording format,
When reproducing the first data group, if it is detected that the predetermined flag is set, the reproducing apparatus operates to reproduce the second data group. In a playback device for playing back data from a recording medium,
The data on the recording medium has at least a first data group and a second data group, and the first data group is recorded on the recording medium according to a first recording format, and the second data group The data group is recorded on the recording medium in accordance with a second recording format different from the first recording format,
The first data group includes a predetermined file that is not defined in the first recording format,
When reproducing the first data group, if the presence of the predetermined file is detected, the reproducing apparatus operates to reproduce the second data group. A recording / reproducing apparatus for recording data on a recording medium,
The data has at least a first data group and a second data group, the first data group is recorded on the recording medium according to a first recording format, and the second data group is Recording on the recording medium in accordance with a second recording format different from the first recording format,
The recorded content of the first data group is recorded as something that can recognize the existence of the second data group on the recording medium, or something that can analogize the recorded content of the second data group. And a recording / reproducing apparatus. The recording / reproducing apparatus according to claim 10,
The recording medium has a disk shape,
A recording / reproducing apparatus for recording the recording area of the first data group and the recording area of the second data group as fixed areas on the recording medium, respectively. The recording / reproducing apparatus according to claim 10 and claim 11,
The first data group and the second data group are at least encoded data of video data,
A recording / reproducing apparatus comprising: encoding means for the first data group and second data group; and decoding means for the first data group and second data group. The data recording method according to claim 1,
The recording / reproducing apparatus, wherein the first recording format is a DVD video format, and the second recording format is a format corresponding to video data having a resolution higher than the resolution of the DVD video format.

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