JP2005100621A - Recorder of disk for audio - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To record audio data adaptively to various EMD encoding systems and while ensuring a reproduction compatibility by means of an AOB (Audio Object) without impairing functions for various copyright production systems. <P>SOLUTION: The disk D is provided with a data structure including an EMD elementary stream 23 compressing the audio data by using the audio encoding system, the digital right information 22 and EMD added data 21 of the audio data, a DVD-AR audio object 13 making either one of the linear PCM audio data elongating the elementary stream or a temporary elementary stream further compressing the linear PCM audio data, to the packet state, the digital right information 12 of the audio object produced on the basis of the digital right information and added data of the audio data, and reproduction management data 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an audio disk recording apparatus.

  Conventionally, DAT (Digital Audio Tape), MD (Mini Disc), and the like exist as recording media capable of recording / reproducing digital audio data. These can record high-quality audio data for 74 to 120 minutes per medium, and have been mainly used for copying and recording music from packaged media such as a commercially available CD.

In recent years, a memory card (such as an SD memory card or a memory stick) using a semiconductor memory has been put to practical use as another recording medium capable of recording / reproducing digital audio data. These can record audio data compressed by an audio encoding method such as MP3 (MPEG Audio Layer 3), AAC (MPEG Audio AAC), or ATRAC3 for about 30 to 120 minutes.
. In addition to copying and recording music from packaged media such as CDs that are commercially available, the memory card mainly uses an electronic music distribution (EMD) system configured on the Internet via a PC or the like. Used for recording downloaded music. These memory cards are also characterized by the function of protecting the rights (copyright) of music, complying with an activity called SDMI (Secure Digital Music Initiative), protecting music from piracy, It makes it possible to copy music safely within the rules.

  On the other hand, next-generation disk media whose recording capacity is several to ten times that of conventional media are being put into practical use. One is a DVD-ROM disc (read-only optical disc compliant with DVD Specifications for Read-Only Disc), and a recordable / reproducible disc is a DVD-RW disc (re-recording compliant with DVD Specifications for Re-recordable Disc). Discs) and DVD-RAM discs (rewritable discs compliant with DVD Specifiations for Rewritable Disc). A standard for recording video data on a DVD-RW or DVD-RAM disc has been established, and high-capacity moving images and still images can be recorded by utilizing the large capacity, and can be reproduced through various editing.

  In the VIDEO RECORDING standard (hereinafter abbreviated as DVD-VR), which is a standard for recording video data on a DVD-RW disk or DVD-RAM disk (hereinafter abbreviated as DVD-RW / RAM disk), the video data is a video object ( Video Object (VOB) is recorded, and original management data and original PGC (Original Program Chain) for reproducing all VOB groups in the recording order, and all or part of the VOB selected by the user are reproduced in an arbitrary order. User-defined management data and user-defined PGC (User Defined PGC) are defined. There is only one original PGC on the disc, and there can be multiple user-defined PGCs.

  Therefore, the user can perform desired reproduction using the user-defined PGC edited according to the preference. Also, DVD-VR employs a CPRM (Content Protection for Recordable Media) system as a copyright protection function, and protects against piracy by encrypting the VOB. In addition, it has a function of controlling VOB copying in three stages: “copy free”, “copyable for one generation”, and “copy not possible”.

  On the other hand, as with DVD-VR, the AUDIO RECORDING standard (hereinafter abbreviated as DVD-AR), which is a standard for recording audio data on a DVD-RW / RAM disc, is conceivable. In DVD-AR, a method of recording audio data as an audio object (Audio 0bject: AOB) and managing / reproducing AOB groups with original management data (original PGC) and user-defined management data (user-defined PGC) is generally used. Can be considered.

  Also, as a copyright protection function, CPRM or a method equivalent to this is supported, and the AOB is encrypted and the AOB copy is controlled in three stages: “copy free”, “only one generation can be copied”, and “copy not possible”. It is possible. Also, as the audio encoding method of the audio data recorded in the AOB, a method that does not impair the sound quality such as linear PCM or lossless encoding is desirable, but an irreversible (lossy) encoding method (first) for the purpose of extending the recording time. It is also possible to support MP3, AAC, etc.). However, the hardware scale of DVD-AR recording and playback devices is limited, and the number of encoding methods that can be supported is limited.

  In the case of DVD-VR and DVD-AR, the recorded VOB or AOB must be reproducible on all playback devices (players) compatible with DVD-VR or DVD-AR. This is necessary to maintain user compatibility, avoid user confusion, make the standard more popular, and provide users with the ultimate benefit.

FIG. 6 is a conceptual diagram of the structure of the content 10 in the DVD-AR. The DVD-AR content 10 includes a DVD-AR audio object (AOB) 13 which is actual data, copy management information (Copy Control Information: CCI) 12a related to the AOB 13, and reproduction management data 11 (the original management data and user-defined management). Data generic name, hereinafter also referred to as navigation information). The AOB 13 and the CCI 12a are protected by a copyright protection system (CPRM or the like).
Japanese Patent No. 3211772

As a use of DVD-AR, when copying from a package medium such as CD or DVD-Audio, it can be realized by recording with the structure shown in FIG.
In this case, since the data of the package medium is mainly linear PCM, it may be recorded as it is with linear PCM, or may be recorded after being compressed by lossless encoding or lossy encoding. As for copyright protection, since second-generation copying from package media is generally not permitted, it is possible to protect copyright by writing “no copy” in CCI and prohibiting further copying.

  Next, consider the case of recording electronic music distribution (EMD) content. The EMD system is intended to deliver compressed audio data to users in a safe state (a state in which copyright is protected). To date, various EMD systems have been developed and operated to achieve this goal. Each EMD system generally uses a different audio encoding method and copyright protection method. There are various audio encoding methods such as MP3, AAC, ATRAC3, WMA, and TwinVQ, and new methods are expected to appear in the future. There are various copyright protection methods such as EMMS, DRM, Liquid Audio, and WMT, and new methods will appear in the future.

  In addition, EMD systems generally conform to the standards for safe content operation proposed by SDMI, and based on digital rights information (Usage Rule) attached to content, Control copy and move. For example, up to three first generation copies are permitted for one content, and the first generation copy is created in a safe state (this action is called checkout). The number of copies that can be copied is reduced by the number of copies. Conversely, if the action of returning the copy to the copy source (check-in) is performed, the number of copies that can be copied is returned (increased). Through check-out and check-in, it is controlled so that there is always a maximum of three copies for the parent. In SDMI, the parent side (hotel side) of check-out / check-in is called an LCM (License Compliant Module), and the child side (customer side) is called a PM (Portable Media) or Portable Device.

The Usage Rule may include various control information other than check-out / check-in. For example, a function that limits the playback period of the content (cannot be played after a certain period of time), a function that limits the number of playbacks (cannot be played after a certain number of playbacks), etc. can be considered. FIGS. 7A and 7B are configuration conceptual diagrams of the EMD contents 20A and 20B, respectively. The audio data portion described above is transmitted as compressed EMD elementary streams 23A and 23B.
In addition to EMD Usage Rules 22A and 22B, codes such as ISRC for specifying content, text information such as song titles, additional content such as still images, and the like can be transmitted as EMD additional data 21A and 21B.

  In the EMD contents 20A and 20B, all or part of the EMD elementary streams 23A and 23B, the EMD Usage Rules 22A and 22B, and the EMD additional data 21A and 21B are encrypted by a copyright protection method. The components of the EMD contents 20A and 20B differ depending on the EMD system.

  The content 20A of the EMD type (Type) A (EMD-A) shown in FIG. 7A has its own additional content, Usage Rule, and copyright protection method, and the EMD elementary stream 23A is the encoding method X. An example of encoding is shown.

  Similarly, the content 20B of the EMD Type B (EMD-B) shown in FIG. 7B can also have its own additional content, Usage Rule, copyright protection method, and encoding method.

  When recording EMD contents on a DVD-AR, there are several problems. This is described below.

-Audio encoding system Although various encoding systems are used in EMD, the number of systems that can be supported by DVD-AR AOB is limited.

  In addition, since the AOB encoding method must guarantee reproduction compatibility, a future method cannot be added.

  Therefore, it is impossible to support all EMD encoding schemes in the present and future.

  Therefore, there is a need for a method that supports various EMD encoding methods and guarantees reproduction compatibility by AOB.

-Regarding copyright protection schemes Although various copyright protection schemes are used in EMD, there is basically only one scheme that can be supported as a standard in DVD-AR.

  There is also a limit to the digital rights information that can be handled.

  Therefore, there is a need for a method for recording on a disc without impairing the functions of various copyright protection schemes.

In view of the above-described problems of the conventional example, the present invention is compatible with various EMD encoding systems and can guarantee reproduction compatibility by AOB, and audio data without impairing the functions of various copyright protection systems. Recording device for audio discs,
The purpose is to provide.

  In order to achieve the above object, the present invention has the following configurations as means.

That is, according to the present invention, an elementary stream obtained by compressing audio data using an audio encoding method is packetized, a first audio object is generated, and linear PCM audio data obtained by decompressing the elementary stream is obtained. Means for generating or further compressing the linear PCM audio data to generate a temporary elementary stream, and packetizing the linear PCM audio data or the temporary elementary stream to generate a second audio object; Generating right information including copy control information, move control information, and reproduction count control information, which is the digital right information of the first and second audio objects based on the digital right information of the audio data And means for generating reproduction management data of the first and second audio objects based on the additional data relating to the audio data, the first and second audio objects, digital right information thereof, and reproduction management Means for recording data on the audio disc;
An audio disc recording apparatus is provided.
Further, according to the present invention, the means for generating the still picture data by extracting the still picture elementary stream included in the additional data of the audio data, or the still picture elementary stream by packetizing the still picture data. Means for generating a picture object; and means for recording the still picture data or the still picture object on the audio disc together with the first and second audio objects, the digital right information and the reproduction management data. An audio disk recording apparatus according to claim 1 is provided.
Further, according to the present invention, an elementary stream obtained by compressing audio data using an audio encoding method, and digital rights information of the audio data, including rights including copy control information, move control information, and playback count control information. And a data group including additional data related to the audio data, and means for receiving the still image data via the electronic music distribution system when the additional data of the audio data includes a still image. An audio disk recording apparatus according to claim 2 is provided.

According to the present invention, EMD content is converted into DVD-AR content and recorded on a disc, and digital rights information and reproduction management data of DVD-AR content are generated based on digital rights information and additional data of EMD content. Therefore, the content can be recorded on the disc regardless of the type of the EMD system and the audio encoding system of the EMD.
Further, since DVD-AR content can be used during reproduction, reproduction compatibility can be ensured. Further, EMD-specific functions such as check-out and check-in can be realized by using the EMD content side.
In addition, this data structure can be recorded as a disc even if a new EMD system or audio encoding method is introduced in the future.
As the recording device, it is necessary to update the EMD receiver, the EMD copyright protection type encryption / decryption unit, and the EMD audio decoder. However, when the recording device is based on a personal computer, or only the above three parts are used by the personal computer. In the case of an apparatus to be performed, it can be easily handled.
Further, according to the second embodiment of the present invention, the same effect as the first embodiment can be obtained, and at the same time, only the DVD-AR audio object is recorded and the EMD elementary stream is not recorded. The recording time on the disc can be extended as compared with the case of the first embodiment.
Further, according to the third embodiment of the present invention, the same effects as those of the first embodiment can be obtained, and the Usage Rule is unified with the DVD-AR Usage Rule 12, so that check-in / check-out and The DVD-AR rule is applied uniformly with respect to the move operation, and higher compatibility can be ensured.
Further, according to the fourth embodiment of the present invention, the same effect as in the third embodiment can be obtained, and still image data in the EMD additional data 21 is also controlled from the DVD-AR navigation information 11. Since it is recorded in the form, it is possible to reproduce a still image together with audio, and since the recording method of the still image data and the navigation information 11 are also recorded based on the DVD-AR regulations, the still image is also higher. Compatibility can be ensured.

<First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing a first embodiment of the data structure of an audio disc according to the present invention, FIG. 2 is a block diagram showing the first embodiment of a recording apparatus according to the present invention, and FIG. FIG. 4 is a block diagram showing a first embodiment of a playback apparatus according to the present invention.

In FIG. 1, an EMD additional data 21, an EMD Usage Rule (usage rule) 22, and an EMD elementary stream 23 of an EMD content 20 transmitted from an arbitrary EMD system are directly stored on the DVD-AR disc. (DVD-AR navigation information 11, DVD-AR Usage Rule 12, DVD-AR audio object 13) are recorded.
The EMD content 20 is referenced from the DVD-AR navigation information 11, and thus the relationship between the DVD-AR content 10 and the EMD content 20 is defined. The embodiment shown in FIG. 1 shows an example in which the copyright protection system of EMD content 20 is converted to a DVD-AR copyright protection system.

  FIG. 2 shows an example of a block diagram of a recording apparatus for recording the DVD-AR content 10 and the EMD content 20 shown in FIG. The data structure shown in FIG. 1 will also be described in detail with reference to FIG. The recording apparatus has an EMD receiver 31 connected to an EMD system site 30 such as the Internet and receiving the EMD content 20 at the first stage. The received EMD content 20 is once decrypted by the EMD copyright protection system encryption / decryption unit 32. The EMD elementary stream 23 is decoded by the EMD audio decoder 33 to become LPCM data, and is also transmitted to the DVD-AR formatter 36. The LPCM data is sent to the DVD-AR formatter 36 via the DVD-AR audio encoder 34 and packetized only when a compression encoding method (lossless method or lossy method) other than LPCM is used as the DVD-AR content 10. And converted to an audio object.

  On the other hand, EMD Usage Rule 22 and EMD additional data 21 after encryption / decryption are transmitted to DVD-AR navigation control unit 35a / Usage Rule conversion unit 35b, where navigation information 11 for DVD-AR is created, and DVD-AR Converted to AR Usage Rule 12. The EMD Usage Rule 22, the EMD additional data 21, the DVD-AR navigation information 11 and the DVD-AR Usage Rule 12 are transmitted to the DVD-AR formatter 36 and converted into a predetermined format of DVD-AR. The necessary part of the formatted data is further encrypted by the DVD-AR copyright protection system encryption unit 37 and then recorded on the disk D through the disk writing unit 38.

  Here, the usage of the DVD-AR content 10 and the EMD content 20 shown in FIG. 1 will be considered. The DVD-AR content 10 is recorded for reproduction compatibility as a DVD-AR. Therefore, the required function is basically only reproduction, and check-in / check-out control specific to SDMI is performed. There is no need to take charge. On the other hand, the EMD content 20 holds an original EMD Usage Rule 22 corresponding to SDMI, and can perform check-in / check-out control.

FIG. 3 shows the usage on the DVD-AR content 10 side and the EMD content 20 side and the contents of the Usage Rule. The EMD content 20 side may include check-in / check-out control information, control information on the number of playbacks and playback period, and other control information unique to the EMD system. On the other hand, since the DVD-AR content 10 side is used only for reproduction, the copy control information is basically set to “non-copyable”.
In addition, when the EMD content 20 requests control of the number of times of reproduction and the reproduction period, such information can also be described for reproduction control. Thus, information unique to the EMD system is not handled by the DVD-AR.

  FIG. 4 illustrates a block diagram of a DVD-AR playback apparatus that plays back the DVD-AR content 10. The DVD-AR content 10 read from the disc D is decrypted by the DVD-AR copyright protection system encryption / decryption unit 42 via the disc reading unit 41, and necessary for the DVD-AR format decoder 43 as described above. Data 11, 12, 13, etc. are separated. The DVD-AR navigation information 11 and the DVD-AR Usage Rule 12 are transmitted to the DVD-AR navigation control unit 44a and the Usage Rule interpretation unit 44b, respectively.

  Based on the DVD-AR Usage Rule 12, the Usage Rule interpretation unit 44b determines whether or not this content can be reproduced. For example, in the case of content for which playback period control is performed and playback is possible, playback is prohibited. If it is a reproducible content, the LPCM data is transmitted from the DVD-AR format decoder 43 to the D / A converter 47, and if it is compressed data, it is decoded by the DVD-AR audio decoder 46 and then D / A. The signal is transmitted to the A converter 47, and an analog audio output is obtained. At the same time, when the external interface circuit 45 is provided, copy management information (basically “copy not possible”) is added according to the DVD-AR Usage Rule 12 and digitally output.

  Next, variations of the first embodiment will be described. 1 and 2, the example in which the EMD content 20 and the DVD-AR content 10 are encrypted by the same DVD-AR copyright protection method has been described. However, as another method, the EMD content 20 is protected by EMD copyright. It is also possible to record on the DVD-AR disc D in a state encrypted by the method, and to encrypt the DVD-AR content 10 using the DVD-AR copyright protection method (not shown).

  Next, the relationship between contents and files will be described. When both are encrypted only by the DVD-AR copyright protection system as shown in FIGS. 1 and 2, the DVD-AR contents 10 and the EMD contents 20 are the same. It is effective in terms of structure to record in the file, and related contents can be easily managed as a single file. On the other hand, when the DVD-AR content 10 and the EMD content 20 are encrypted by different copyright protection methods, they are generally recorded as separate files. Also in this case, the relation between both contents 10 and 20 is managed through the navigation information 11 of the DVD-AR.

  As a further variation, it is conceivable that the content encrypted by the EMD copyright protection method is further encrypted (double encryption) by the DVD-AR copyright protection method (not shown). The handling of the file in this case is almost the same as the case shown in FIGS.

<Second Embodiment>
Next, a second embodiment according to the present invention will be described. In the first embodiment, it has been described that both the DVD-AR audio object 13 and the EMD elementary stream 23 are recorded. As a modification of this, in the second embodiment, only the DVD-AR audio object 13 is recorded. FIG. 5 shows the disk structure of the second embodiment. The following two conditions are conceivable as conditions for taking this embodiment.

1. When the DVD-AR disc D is used for Portable Media use In this case, since it is not for LCM use, it is not necessary to handle check-out from the DVD-AR disc D to an external device. Therefore, it is not necessary to save the EMD elementary stream 23 required at the time of checkout. EMD Usage Rule 22 is necessary for controlling check-in from the DVD-AR disc D to the parent LCM. Portable Media is used for playback, and playback can be performed in the same manner as in the first embodiment using the DVD-AR content 10 side.

2. When the DVD-AR compression method (audio encoding method) and the EMD compression method are the same In this case, the EMD elementary stream 23 can be omitted even when the use of the DVD-AR disc D is LCM. If the EMD elementary stream 23 becomes necessary at the time of checkout, it can be realized by reconverting the DVD-AR audio object 13 to the EMD elementary stream 23.

  In the case of the second embodiment, the block diagram of the recording apparatus is almost the same as that in FIG. 2, and a path for inputting the EMD elementary stream 23 to the DVD-AR formatter 36 becomes unnecessary. Further, the DVD-AR Usage Rule 12 and the EMD Usage Rule 22 are equivalent to those in FIG. 3, and the playback device is also equivalent to that in FIG.

<Third Embodiment>
Next, a third embodiment according to the present invention will be described. This is a modification of the first embodiment. FIG. 8 is an explanatory diagram showing the third embodiment of the data structure of the audio disc according to the present invention, and FIG. 9 is the DVD-AR content and EMD of FIG. It is explanatory drawing which shows the use of content, and digital rights information.

  8 is different from FIG. 1 in that there is no EMD additional data 21 and EMD Usage Rule (use rule) 22 of the EMD content 20 transmitted from an arbitrary EMD system, and that the EMD elementary stream 23 is The point is that it is converted into the EMD audio object 24 and recorded. Here, the EMD audio object 24 is obtained by packetizing the EMD elementary stream 23 shown in FIG. 1 in the same manner as the DVD-AR audio object 13. Further, all or a part (including text information) of the EMD additional data 21 shown in FIG. 1 is converted into the DVD-AR navigation information 11 shown in FIG. Also, the EMD Usage Rule 22 shown in FIG. 1 is converted into a DVD-AR Usage Rule 12.

  In the present embodiment, the DVD-AR content 10 ′ includes a DVD-AR audio object 13, a DVD-AR Usage Rule 12, and DVD-AR navigation information 11. The EMD content 20 ′ includes an EMD audio object 24, a DVD-AR Usage Rule 12, and DVD-AR navigation information 11.

  A block diagram of a recording apparatus for recording the DVD-AR content 10 'and the EMD content 20' of the present embodiment is the same as that shown in FIG. That is, the EMD additional data 21 and the EMD Usage Rule 22 themselves shown in FIG. 1 are not recorded on the disc, but only those converted into the DVD-AR navigation information 11 and the DVD-AR Usage Rule 12 are recorded. Further, the EMD elementary stream 23 shown in FIG. 1 is converted into the EMD audio object 24 in the DVD-AR formatter 36.

  Here, consider the usage of the DVD-AR content 10 'and the EMD content 20' shown in FIG. FIG. 9 shows the usage of the DVD-AR content 10 ′ side and the EMD content 20 ′ side and the content side of the DVD-AR UsageRule 12. The DVD-AR content 10 'is recorded for playback compatibility as a DVD-AR, and therefore the main uses are playback and copying via digital output (when permitted). For playback, there may be a limit on the number of playbacks or a playback period.

  On the other hand, the EMD content 20 ′ is mainly used when exchanging lossy compressed data as it is, such as check-in / check-out and move. (If the move by LPCM is possible, the DVD-AR content 10 'may be moved.) In either case, the DVD-AR Usage Rule 12 is used as the Usage Rule.

  Further, the block diagram of the DVD-AR playback apparatus for playing back the DVD-AR content 10 'in FIG. 8 is the same as FIG.

<Fourth embodiment>
Next, a fourth embodiment according to the present invention will be described. In the third (and first, second) embodiment, no reference is made to a still image that can be included in the EMD additional data 21 shown in FIG. When a still image is included, it is conceivable that the still image data is extracted from the EMD additional data 21 shown in FIG. 1 and recorded. FIG. 10 is an explanatory view showing the fourth embodiment of the data structure of the audio disc according to the present invention. Most of the still picture data is mainly JPEG-compressed, and other MPEG intraframes may be used.

  Hereinafter, description will be made assuming JPEG. The still image data 25 may be recorded in a JPEG elementary stream or a format conforming thereto, or may be recorded as a still image object obtained by packetizing the JPEG elementary stream. Control when the still image data 25 is copied or moved from the disc is performed by the DVD-AR Usage Rule 12. In general, in the case of EMD content, audio and still images are checked in / out and moved at the same time, but may be performed separately.

  In the present embodiment, as shown in FIG. 10, the DVD-AR content 10 ″ can include a DVD-AR audio object 13, a DVD-AR Usage Rule 12, DVD-AR navigation information 11, and still image data 25. Further, the EMD content 20 ″ may include an EMD audio object 24, a DVD-AR Usage Rule 12, DVD-AR navigation information 11, and still image data 25.

  A block diagram of a recording apparatus for recording the DVD-AR content 10 ″ and the EMD content 20 ″ of the present embodiment is the same as FIG. That is, the EMD additional data 21 and the EMD Usage Rule 22 shown in FIG. 1 are not recorded on the disc, but are converted into the DVD-AR navigation information 11 and the still image data 25 and the DVD-AR Usage Rule 12 shown in FIG. Is recorded. More specifically, a still image EMD elementary stream (such as a JPEG elementary stream) is converted into still image data 25 by a DVD-AR formatter 36 and recorded on a disc. The audio EMD elementary stream 23 is converted into an EMD audio object 24 by a DVD-AR formatter 36.

  11 is a block diagram of a DVD-AR playback apparatus that plays back the DVD-AR content 10 ″ (including still image data 25) in FIG. 10. Playback of the DVD-AR audio object 13 in FIG. 10 in FIG. The procedure is basically the same as that of Fig. 4. Further, the reproduction procedure of still image data 25 is added in Fig. 11. That is, the still image data 25 read from the disc D passes through the disc reading unit 41. The DVD-AR copyright protection system encryption / decryption unit 42 decrypts the data, and the DVD-AR format decoder 43 separates the necessary data 11, 12, 25, and the like.

  The still image data 25 is temporarily stored in the still image memory 48. Here, when there are a plurality of still images to be reproduced simultaneously with the audio, all of them are stored in the still image memory 48. Thereafter, while reproducing the audio in the procedure described with reference to FIG. 4, the still image data for one frame is transmitted from the still image memory 48 to the still image decoder 49 at the time when the still image is to be displayed. After being decoded, it is converted into a TV output signal of NTSC or PAL by the D / A TV output circuit 50.

  Note that a playback method in the case where audio data and still image data are recorded separately on a medium as in the present invention is described in detail in Japanese Patent No. 3211772, and will not be particularly described. Further, it is obvious that the method for recording still image data 25 of the fourth embodiment can be added to the first and second embodiments (FIGS. 1 and 5). Here, the drawings are not particularly described.

  In the first to fourth embodiments, “packetization” is a process of adding a header to an elementary stream and unitizing it. FIG. 12 shows a program stream conforming to the MPEG system. An example of the case is shown. The elementary stream is configured as a packetized elementary stream by adding a packet header including synchronization time information or the like, and adding a private header that records private information if necessary. Further, a pack header is added to form a pack, and the pack sequence becomes a program stream. In addition to this example, a transport stream that conforms to the MPEG system may be configured, or may conform to another system.

<Computer program>
In addition, the recording device and the reproducing device in the first to fourth embodiments are not limited to hardware, and may be configured by a computer program to record and reproduce a disc. In this case, the blocks excluding the recording device shown in FIG. 2 and the playback device hardware (disc writing unit 38, disc reading unit 41, D / A converter 47, etc.) shown in FIG. 4 and FIG. can do.

  FIG. 13 schematically shows the processing of the recording computer program. First, an object is generated (step S11), then reproduction management data is generated (step S12), and then these are formatted, streamed and recorded on the disc. (Step S13). FIG. 14 schematically shows the processing of the computer program for reproduction. First, reproduction management data is read from the disc (step S21), then the object is read (step S22), and then the object is reproduced based on the reproduction management data (step S21). Step S23).

It is explanatory drawing which shows 1st Embodiment of the data structure of the audio disc based on this invention. 1 is a block diagram showing a first embodiment of a recording apparatus according to the present invention. It is explanatory drawing which shows the use of DVD-AR content and EMD content of FIG. 1, and digital rights information. It is a block diagram which shows 1st Embodiment of the reproducing | regenerating apparatus based on this invention. It is explanatory drawing which shows the data structure of the audio disc of 2nd Embodiment. It is explanatory drawing which shows the data structure of a DVD-AR disc. It is explanatory drawing which shows the data structure of EMD content. It is explanatory drawing which shows 3rd Embodiment of the data structure of the audio disc based on this invention. It is explanatory drawing which shows the use of DVD-AR content and EMD content of FIG. 8, and digital rights information. It is explanatory drawing which shows 4th Embodiment of the data structure of the audio disc based on this invention. It is a block diagram which shows the reproducing | regenerating apparatus based on the 4th Embodiment of this invention. It is explanatory drawing which shows the example of packetization based on this invention. It is a flowchart which shows the outline of the computer program for recording which concerns on this invention. It is a flowchart which shows the outline of the computer program for reproduction | regeneration based on this invention.

Explanation of symbols

10, 10 ', 10 "DVD-AR content 11 DVD-AR navigation information (reproduction management data)
12 DVD-AR Usage Rule (Digital Rights Information)
12a DVD-AR copy management information (CCI)
13 DVD-AR Audio Object (AOB)
20, 20A, 20B, 20 ', 20 "EMD content 21 EMD additional data 22 EMD Usage Rule (digital rights information)
23, 23A, 23B EMD elementary stream 24 EMD audio object 25 Still image data 31 EMD receiver 32 EMD copyright protection method encryption / decryption unit 33 EMD audio decoder 34 DVD-AR audio encoder 35a DVD-AR navigation control unit 35b Usage Rule Conversion unit 36 DVD-AR formatter 37 DVD-AR copyright protection method encryption unit 38 Disc writing unit 41 Disc reading unit 42 DVD-AR copyright protection method encryption / decryption unit 43 DVD-AR format decoder 44a DVD-AR navigation control unit 44b Usage Rule Interpreting Unit 48 Still Image Memory 49 Still Image Decoder 50 D / A TV Output Circuit

Claims (3)

Means for packetizing an elementary stream obtained by compressing audio data using an audio encoding method and generating a first audio object;
Generate linear PCM audio data obtained by decompressing the elementary stream, or further compress the linear PCM audio data to generate a temporary elementary stream, and packetize the linear PCM audio data or the temporary elementary stream. Means for generating a second audio object;
Based on the digital rights information of the audio data, digital rights information of the first and second audio objects, including rights control information including copy control information, move control information, and playback count control information, and the audio Means for generating reproduction management data of the first and second audio objects based on additional data relating to data;
Means for recording the first and second audio objects and their digital right information and reproduction management data on the audio disc;
A recording apparatus for an audio disc. Means for extracting a still picture elementary stream included in the additional data of the audio data to generate still picture data, or means for packetizing the still picture elementary stream to generate a still picture object;
Means for recording the still image data or the still image object on the audio disc together with the first and second audio objects, the digital right information and the reproduction management data;
The audio disk recording apparatus according to claim 1, further comprising:   An elementary stream obtained by compressing audio data using an audio encoding method, rights information including copy control information, move control information, and playback count control information, which is digital rights information of the audio data, and an addition related to the audio data 3. The data group according to claim 2, further comprising means for receiving still image data via an electronic music distribution system when a still image is included in the data group including data and the additional data of the audio data. Audio disc recording device.

Images