JP2003022605A - Method for transmitting audio data and method for transmitting and receiving information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To deal with to various EMD(electronic music distribution) encoding methods, to guarantee reproduction compatibility by an AOB and also to transmit audio data without damaging the functions of various copyright protection method. SOLUTION: A disk D has a data structure including an EMD elementary stream 23 obtained by compressing audio data by using an audio encoding method, digital right information 22 of audio data and EMD added data 21, DVD-AR audio objects 13 resulting from packeting either linear PCM audio data being expansion of the first elementary stream or a temporary elementary stream being further compression of the linear PCM audio data, digital right information about audio data and digital right information 12 about audio object generated on the basis of added data, and playback management data 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio data transmitting method and an information transmitting / receiving method for transmitting / receiving a computer program for recording data relating to audio data.

[0002]

2. Description of the Related Art Conventionally, as a recording medium capable of recording and reproducing digital audio data, DAT (Di
Gital Audio Tape) and MD (Mini Disc) exist. These are capable of recording high-quality audio data for 74 to 120 minutes per medium, and their main applications were to copy and record music from package media such as commercially available CDs.

In recent years, a memory card (SD memory card, memory stick, etc.) using a semiconductor memory has been put into practical use as another recording medium capable of recording / reproducing digital audio data. They are,
MP3 (MPEG Audio Layer 3) and AAC (MPEG
Audio data compressed by an audio encoding method such as Audio AAC) or ATRAC3 can be recorded for about 30 to 120 minutes. In addition to copying and recording songs from commercially available package media such as CDs, memory cards mainly use electronic music distribution (EM) that is configured on the Internet.
D) Used for recording music downloaded from the system via a PC or the like. These memory cards are also characterized in that they have a function of protecting music rights (copyright), and SDMI (Secure Digital Music Initiation).
It protects music from piracy and makes it possible to copy music safely within certain rules.

On the other hand, a next-generation disk medium whose recording capacity is several times to more than ten times that of a conventional medium is being put to practical use. One is a DVD-ROM disc (DVD Specifi
This is a read-only optical disc compliant with cations for Read-Only Disc, and a DVD-RW disc (DVD Specifications for Re-recordable disc that can be recorded and reproduced).
Re-recordable disc conforming to recordable disc) and DVD-RAM disc (DVD Specifiations for R)
Rewritable disc conforming to ewritable Disc)
There is. A standard for recording video data on a DVD-RW or DVD-RAM disk has also been established, and by utilizing its large capacity, high-quality moving images and still images can be recorded and reproduced after various editing.

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

Therefore, the user can reproduce the favorite by using the user-defined PGC edited according to the taste. Further, in the DVD-VR, as a copyright protection function, CPRM (Content Protection for Recordable Me
dia) method is adopted, and the VOB is encrypted to protect it from piracy. It also has a function of controlling VOB copying in three stages: "copy free", "copy only for one generation", and "copy not possible".

On the other hand, like the DVD-VR, the DVD-R
AUDIO RECORDING standard (hereinafter referred to as DVD-AR), which is a standard for recording audio data on a W / RAM disk
Can be abbreviated). And, even in the DVD-AR, audio data is converted to an audio object (Audio 0bjec
It is generally conceivable to record and record the AOB group as original management data (original PGC) and user-defined management data (user-defined PGC).

[0008] Also, as a copyright protection function, CPRM or a system based on it is supported, and the AOB is encrypted and the copy of the AOB is "copy free", "only one generation can be copied", and "copy not possible". It is possible to control with. As an audio encoding method for audio data recorded in AOB, a method such as linear PCM or lossless encoding that does not impair the sound quality is desirable.
Lossy encoding method for extending recording time
It is also possible to support (such as MP3 and AAC described above). However, there is a limit to the hardware scale of the DVD-AR recording device / reproducing device, and there is a limit to the number of encoding methods that can be supported.

In both the case of DVD-VR and the case of DVD-AR, the recorded VOB or AOB is the DVD.
-It is necessary to be able to perform playback on all playback devices (players) compatible with VR or DVD-AR. This avoids user confusion by maintaining playback compatibility,
This is what is needed to make the standard more popular and to the end user.

FIG. 6 shows the content 1 in the DVD-AR.
The structural conceptual diagram of 0 is shown. DVD-AR content 10
Is a DVD-AR audio object (AOB) 13 that is actual data, copy control information (CCI) 12a related to the AOB 13, and reproduction management data 11 (general term for the original management data and user-defined management data, , Navigation information). The AOB 13 and the CCI 12a are protected by a copyright protection system (CPRM or the like).

[0011]

When copying from a package medium such as a CD or a DVD-Audio as an application of the DVD-AR, 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, this may be recorded as it is by linear PCM, or may be compressed and recorded by lossless coding or lossy coding. Regarding copyright protection, since second-generation copying from packaged media is generally not permitted, it is possible to protect copyright by describing "copy prohibited" in the CCI and prohibiting further copying.

Next, consider the case of recording electronic music distribution (EMD) contents. The EMD system aims to deliver compressed audio data to a user in a safe state (copyright protected state). To date, various EMD systems for achieving this purpose have been developed and are in operation. In each EMD system, the audio encoding method and the copyright protection method used are generally different. MP as audio encoding method
3, AAC, ATRAC3, WMA, TwinVQ, etc., and new methods are expected to appear in the future. Also, as a copyright protection method, EMMS, DRM, Liqu
There are various types such as id Audio and WMT, and new methods will emerge for the future.

Further, the EMD system generally complies with the standard of safe content operation advocated by SDMI, and based on the digital right information (Usage Rule) attached to the content. , Control the copying and movement of content. For example, up to three copies of the first generation are permitted for one content, and the first generation copy is made in a safe state (this action is called checkout). The number that can be copied is reduced by the number of copies. Conversely, if you perform the act of returning the copy to the copy source (called check-in), the number of possible copies will be restored (increase). Through check-out / check-in, there is always a maximum of three copies of a parent controlled. In SDMI, the parent side (hotel side) of check-out and check-in is LCM (Li
cense Compliant Module) and P on the child side (customer side)
It is called M (Portable Media) or Portable Device.

The Usage Rule may include various control information other than check-out and check-in. For example, a function of limiting the reproduction period of the content (reproduction cannot be performed after a certain period of time), a function of limiting the number of reproductions (reproduction of a certain number of times, subsequent reproduction cannot be performed) are considered. FIGS. 7A and 7B are conceptual configuration diagrams of the EMD contents 20A and 20B, respectively. The audio data portion described above is transmitted as the compressed EMD elementary streams 23A and 23B. EMD U
In addition to the sage rules 22A and 22B, the EMD additional data 21A and 21B, such as a code such as ISRC that identifies the content, text (also referred to as text information) such as a song title, and additional content such as a still image can be transmitted.

The EMD contents 20A and 20B are written in the EMD elementary stream 23 by the copyright protection method.
A, 23B and EMD Usage Rules 22A, 22B and E
All or part of the MD additional data 21A and 21B is encrypted. The EMD contents 20A and 20B have different constituent elements depending on the EMD system. Content 20A of EMD type (Type) A (EMD-A) shown in FIG. 7A is a unique additional content, Usage Rul.
e, a copyright protection system is provided, and the EMD elementary stream 23A is encoded by the encoding system X. In addition, EMD Type B (EM
Similarly, it is shown that the content 20B of D-B) may have its own additional content, Usage Rule, copyright protection system, and encoding system.

There are some problems in recording the EMD contents on the DVD-AR. It is described below. -About audio encoding system EMD uses various encoding systems, but DVD-AR
There is a limit to the number of methods that AOB can support. In addition, since the AOB encoding method must guarantee reproduction compatibility, it cannot be added in the future. Therefore, it is impossible to support all the EMD coding schemes in the present and the future. So various E
There is a need for a method that is compatible with the MD encoding method and that guarantees reproduction compatibility by AOB.

Regarding copyright protection system EMD uses various copyright protection systems, but DVD-
There is basically one type of system that can be supported by AR as a standard. Also, there is a limit to the digital rights information that can be handled. Therefore, there is a need for a method of recording on a disc without impairing the functions of various copyright protection systems.

In view of the problems of the above-mentioned conventional example, the present invention is compatible with various EMD encoding systems, can guarantee reproduction compatibility by AOB, and impairs the functions of various copyright protection systems. It is an object of the present invention to provide an audio data transmission method and an information transmission / reception method that can transmit audio data and related computer programs without the need.

[0019]

In order to achieve the above object, the present invention converts EMD contents into DVD-AR contents and records them on a disc, and at the same time, based on the digital right information and additional data of the EMD contents, the DV is recorded.
The digital right information of the D-AR content and the reproduction management data are generated and recorded on the disc.

That is, according to the present invention, an elementary stream obtained by compressing audio data by using an audio encoding method, identification information indicating the audio encoding method, digital right information of the audio data, and the audio data. Additional data including a text and a still image, a linear PCM audio data obtained by decompressing the elementary stream, or an audio object obtained by packetizing either a temporary elementary stream obtained by further compressing the linear PCM audio data, Before generated based on the digital right information of the audio object generated based on the digital right information of the audio data and the additional data including the text and the still image related to the audio data. And reproduction management data of the audio objects, comprising the steps of packetizing the data of a data structure having, and transmitting through a communication line said packetized data, audio data transmission method with is provided.

Further, according to the present invention, an elementary data obtained by compressing audio data using an audio encoding system
Recording a data group including a stream, identification information indicating the audio encoding method, digital right information of the audio data, and additional data including text and a still image related to the audio data on an audio recording medium; Linear PCM audio data is generated by decompressing an elementary stream, or the linear PCM audio data is further compressed to generate a temporary elementary stream, and the linear PCM audio data or temporary elementary stream is packetized to produce audio. Generating an object, generating digital rights information of the audio object based on the digital rights information of the audio data, and Generating reproduction management data of the audio object based on additional data including a text and a still image, and recording the audio object and its digital right information and reproduction management data in the audio recording medium. And an information transmitting / receiving method for transmitting or receiving a recording computer program, comprising: converting the computer program into a predetermined communication format for transmission; or receiving a computer program converted into the predetermined format to receive the original program. An information transmission / reception method is provided that has a step of restoring the computer program.

Further, according to the present invention, an elementary data obtained by compressing audio data by using an audio encoding system.
Recording a data group including a stream, identification information indicating the audio encoding method, digital right information of the audio data, and additional data including a text and a still image related to the audio data in an audio recording medium; Generating linear PCM audio data by decompressing a stream, or further compressing the linear PCM audio data to generate a temporary elementary stream, and packetizing the linear PCM audio data or temporary elementary stream to produce audio. Generating an object, generating digital right information of the audio object based on the digital right information of the audio data, and relating to the audio data. Generating reproduction management data of the audio object based on additional data including text and still image; and recording the audio object and its digital right information and reproduction management data in the audio recording medium. A computer program for reproducing an audio recording medium recorded by the recording method, which comprises reproducing the audio object according to identification information of the audio encoding method, digital right information thereof, and reproduction management data. A method for transmitting and receiving information for transmitting or receiving a computer program for reproduction, comprising:
An information transmission / reception method is provided, which comprises the steps of converting the computer program into a predetermined communication format and transmitting the converted computer program, or receiving the computer program converted into the predetermined format and restoring the original computer program.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION <First Embodiment> An embodiment of the present invention will be described below with reference to the drawings. Figure 1
2 is an explanatory diagram showing an example of a data structure of an audio disc for explaining an embodiment of an audio disc data transmitting method and an information transmitting / receiving method according to the present invention, and FIG. 2 is a recording device for recording on the audio disc of FIG. FIG. 3 is an explanatory diagram showing the usage and digital right information of the DVD-AR content and EMD content of FIG. 1, and FIG. 4 is a block diagram of an example of a reproducing apparatus for reproducing from the audio disc of FIG. It is a figure.

In FIG. 1, EMD additional data 2 of EMD content 20 transmitted from an arbitrary EMD system.
1, EMD Usage Rule (usage rule) 22,
EMD Elementary Stream 23 is DVD as it is
-DVD-AR content 10 (DV
D-AR navigation information 11, DVD-AR Usage
Rule12, DVD-AR audio object 1
Recorded with 3). The EMD additional data 21 includes a text and a still image. EMD content 20 is a DVD
-Referenced from AR navigation information 11,
Therefore, the relationship between the DVD-AR content 10 and the EMD content 20 is defined. The navigation information includes identification information of the audio encoding method of the EMD elementary stream 23. FIG. 1 shows an example in which the copyright protection method of the EMD content 20 is converted to the DVD-AR copyright protection method.

FIG. 2 shows an example of a block diagram of a recording device 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. This recording device has an EMD system site 3 such as the Internet at the first stage.
EMD connected to 0 to receive EMD content 20
It has a receiver 31. Received EMD content 20
Is temporarily decrypted by the EMD copyright protection encryption / decryption unit 32. The EMD elementary stream 23 therein is decoded by the EMD audio decoder 33 to be LPCM data, and is also transmitted to the DVD-AR formatter 36. Only when a compression encoding method (lossless method or lossy method) other than LPCM is used as the DVD-AR content 10, the LPCM data is sent to the DVD-AR formatter 36 via the DVD-AR audio encoder 34 and packetized. And converted to an audio object.

On the other hand, EMD Usage Rule 2 after encryption / decryption
2 and the EMD additional data 21 are transmitted to the DVD-AR navigation control unit 35a / Usage Rule conversion unit 35b, where the navigation information 11 for DVD-AR is created and also converted to the DVD-AR Usage Rule 12. EMD Usage Rule22, EMD additional data 21
And DVD-AR navigation information 11 and DVD-A
The R Usage Rule 12 is transmitted to the DVD-AR formatter 36 and converted into a predetermined format of DVD-AR. This formatted data can be used for DVD-AR
The necessary portion is encrypted by the copyright protection encryption unit 37, and then the disc D is passed through the disc writing unit 38.
Recorded in.

Now, let us consider the uses of the DVD-AR content 10 and the EMD content 20 shown in FIG. DVD
-The AR content 10 is recorded for reproduction compatibility as a DVD-AR, and therefore the basically required function is only reproduction, and is responsible for the SDMI-compatible check-in / check-out control. No need. On the other hand, the EMD content 20 holds the original EMD Usage Rule 22 compatible with SDMI, and can perform check-in / check-out control.

FIG. 3 shows the E side of the DVD-AR content 10 side.
The usage of the MD content 20 and the content of the Usage Rule are shown. The EMD content 20 side may include check-in / check-out control information, control information of the number of times of reproduction and a reproduction 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 "copy prohibited". Further, 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 the control of reproduction. Thus, E
Information unique to the MD system is not handled by DVD-AR.

FIG. 4 illustrates a block diagram of a DVD-AR reproducing apparatus for reproducing the DVD-AR content 10. 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 the DVD-AR
The above-mentioned data 1 required by the AR format decoder 43
1, 12, 13, etc. are separated. The DVD-AR navigation information 11 and the DVD-AR Usage Rule 12 are
DVD-AR navigation controller 44a and Us, respectively
It is transmitted to the age rule interpretation unit 44b.

In the Usage Rule interpreter 44b, the DVD-AR
Based on the Usage Rule 12, it is determined whether this content can be reproduced. For example, if the content has a reproduction period control and the reproduction-enabled period has elapsed, the reproduction is prohibited. If the content can be played, D
The LPCM data is transmitted from the VD-AR format decoder 43 to the D / A converter 47, and if it is compressed data, the DVD-AR audio decoder 46.
After being decoded by, the signal is transmitted to the D / A converter 47 and an analog audio output is obtained. At the same time, if the external interface circuit 45 is provided, the DVD-AR
According to the Usage Rule 12, copy management information (basically "copy not possible") is added and digitally output.

Next, variations of the first embodiment will be described. In FIGS. 1 and 2, EMD content 2
0 and DVD-AR contents 10 are the same DVD-AR
Although the example of performing encryption by the copyright protection method has been described, as another method, the EMD content 20 is recorded on the DVD-AR disc D in the state of being encrypted by the EMD copyright protection method, and the DVD-AR content 10 is recorded. Can be encrypted by the DVD-AR copyright protection system (not shown).

Next, to describe the relationship between contents and files, as shown in FIGS. 1 and 2, when both are encrypted only by the DVD-AR copyright protection system, the DVD-AR contents 10 and the EMD contents are It is structurally effective to record 20 in the same 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 systems,
It is common to record each as a separate file. In this case as well, the relation between both contents 10 and 20 is
It is managed through the navigation information 11 of the DVD-AR.

As a further variation, EM
It is conceivable that the content encrypted by the D copyright protection system may be further encrypted by the DVD-AR copyright protection system (double encryption) (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, the DVD-AR audio object 13 and the EM
It has been stated that both D elementary streams 23 are recorded. As a modification, in the second embodiment, the DVD
Record only the AR audio object 13. FIG. 5 shows the structure of a disk used in the second embodiment.
The following two conditions are conceivable as conditions that can be adopted in this embodiment.

1. DVD-AR disk D is Portable M
When used for edia 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 checkout. The EMD Usage Rule 22 is required to control the check-in from the DVD-AR disc D to the parent LCM. The purpose of Portable Media is playback, and playback is D
This can be performed using the VD-AR content 10 side as in the first embodiment.

2. When the compression method (audio encoding method) of the DVD-AR and the compression method of the EMD are the same, in this case, the application of the DVD-AR disc D is LCM.
, The EMD elementary stream 23 can be omitted. When the EMD elementary stream 23 is needed at the time of check-out, it becomes possible by re-converting the DVD-AR audio object 13 into 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 of FIG. 2, and the path for inputting the EMD elementary stream 23 to the DVD-AR formatter 36 becomes unnecessary. Also, DVD-AR Usage Rule
12, EMD Usage Rule 22 is equivalent to that of FIG. 3, and the reproducing apparatus is also equivalent to that of FIG.

<Third Embodiment> Next, a third embodiment of the present invention will be described. This is a modification of the first embodiment, FIG. 8 is an explanatory diagram showing the data structure of an audio disc used in the third embodiment of 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 right information.

8 is different from FIG. 1 in that the EMD additional data 21 and the EMD Usage Rule 22 of the EMD content 20 transmitted from an arbitrary EMD system do not exist, and the EMD elementary The point is that the stream 23 is converted into an EMD audio object 24 and recorded. Where E
The MD audio object 24 is the EM shown in FIG.
The D elementary stream 23 is packetized like the DVD-AR audio object 13. Further, all or part (including text information) of the EMD additional data 21 shown in FIG. 1 is the DVD-A shown in FIG.
It is converted into R navigation information 11. The EMD Usage Rule 22 shown in FIG. 1 is a DVD-AR Usage Rule.
Converted to 12.

In the present embodiment, the DVD-AR content 10 'includes a DVD-AR audio object 13, a DVD-AR Usage Rule 12, and a DVD-AR.
It consists of AR navigation information 11. In addition, the EMD content 20 'is the EMD audio object 24.
, DVD-AR Usage Rule 12, and DVD-AR navigation information 11.

A block diagram of a recording device for recording the DVD-AR content 10 'and the EMD content 20' used in the present embodiment is the same as FIG. That is,
EMD additional data 21 and EMD Usage Rule shown in FIG.
22 itself is not recorded on the disc, and each DVD-A
R navigation information 11 and DVD-AR Usage Rule
Only those converted to 12 are recorded. The EMD elementary stream 23 shown in FIG. 1 is a DVD-AR.
The formatter 36 converts the EMD audio object 24.

Now, let us consider the uses of the DVD-AR content 10 'and the EMD content 20' shown in FIG. FIG. 9 shows the uses of the DVD-AR content 10 'side and the EMD content 20' side and the content side of the DVD-AR Usage Rule 12. DVD-AR content 10 'is DVD-A
It is recorded for playback compatibility as R, and thus its main application is playback and copying via digital output (when permitted). Reproduction may be restricted by the number of times of reproduction or the reproduction period.

On the other hand, the EMD content 20 'is mainly used for check-in / check-out, move, etc., when exchanging lossy-compressed data as it is. (If you can move with LPCM,
The DVD-AR content 10 'may be moved. )
In either case, the usage rule is DVD-AR Usa.
ge Rule 12 is used.

The block diagram of the DVD-AR reproducing apparatus for reproducing the DVD-AR content 10 'shown in FIG. 8 is the same as that shown in FIG.

<Fourth Embodiment> Next, a fourth embodiment according to the present invention will be described. Third (and first,
In the second embodiment, the text and the still image that can be included in the EMD additional data 21 shown in FIG. 1 are not mentioned. When a still image is included, it may be considered that the data of the still image is extracted from the EMD additional data 21 shown in FIG. 1 and recorded. FIG. 10 is an explanatory diagram showing the data structure of an audio disc used in the fourth embodiment of the present invention. Most of the still image data is mainly JPEG-compressed, and MPEG intraframes may also 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 to this, or JPEG
The elementary stream may be recorded as a packetized still image object. The control when copying or moving the still image data 25 from the disc is performed by the DVD-
It is performed by the AR Usage Rule 12. Generally E
In the case of MD contents, audio and still images are checked in / out and moved at the same time, but in some cases, they may be checked separately.

In the present embodiment, as shown in FIG. 10, the DVD-AR content 10 ″ includes the DVD-AR audio object 13 and the DVD-AR Usage Rul.
e12, DVD-AR navigation information 11 and still image data 25. Also, EMD content 2
0 "means EMD audio object 24 and DVD
-AR Usage Rule 12, DVD-AR navigation information 11, and still image data 25.

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

Also, the DV for reproducing the DVD-AR content 10 "(including the still picture data 25) in FIG.
A block diagram of the D-AR reproducing device is shown in FIG. Figure 11
The reproduction procedure of the DVD-AR audio object 13 of FIG. 10 in FIG. 10 is basically the same as the case of FIG.
Further, in FIG. 11, a reproduction procedure of the still image data 25 is added.
That is, the still image data 2 read from the disc D
5 is a DVD-AR via the disc reading unit 41
The DVD is decrypted by the copyright protection encryption / decryption unit 42.
-The AR format decoder 43 separates the above-mentioned data 11, 12, 25 and the like required.

The still picture data 25 is temporarily stored in the still picture memory 48. Here, if 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. After that, while reproducing the audio in the procedure described in FIG. 4, at the time when the still image should be displayed, one still image data is transmitted from the still image memory 48 to the still image decoder 49 and decoded by the still image decoder 49. And then NT by the D / A TV output circuit 50.
It is converted into an SC or PAL TV output signal.

The reproducing method in the case where the audio data and the still image data are separately recorded on the medium as in the present invention is described in detail in Japanese Patent No. 3211772. I won't explain. Furthermore, it is obvious that the recording method of the still image data 25 of the fourth embodiment can be added to the first and second embodiments (FIGS. 1 and 5). Here, the drawings will not be specifically described.

In the first to fourth embodiments, "packetization" is a process of adding a header or the like to an elementary stream to unitize it, and FIG.
Shows an example of making a program stream compliant with the MPEG system. Elementary Stream
A packet header including synchronization time information and the like is added, and if necessary, a private header for recording private information is added to form a packetized elementary stream. 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 conforming to the MPEG system may be configured or may conform to other systems.

<Computer Program> Further, the recording device and the reproducing device used in the first to fourth embodiments are not limited to hardware, and a computer program may be used to record and reproduce a disc. You may In this case, the recording device shown in FIG.
Blocks other than the hardware of the reproducing apparatus shown in FIG. 11 (the disc writing unit 38, the disc reading unit 41, the D / A converter 47, etc.) can be realized by a computer program.

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 and streamed. The data is recorded on the disc (step S13).
FIG. 14 schematically shows the processing of the computer program for reproduction. First, the reproduction management data is read from the disc (step S21), the object is then read (step S22), and the object is reproduced based on the reproduction management data (step S22). Step S23).

<Transmission Method> FIG. 16 is a flowchart showing a method of transmitting the above audio data or program. In step S31, it is determined whether the transmission is permitted. That is, when the copy prohibition information is present, the transmission is not permitted. If the transmission is permitted (YES), the packet is converted into the format of the packet to be transmitted in step S32, and then transmitted to the communication network (not shown) in step S33 for transmission. On the other hand, when the transmission is not permitted in step S31 (NO), the process goes to step S34 and the transmission is stopped (prohibited).
To be done. The target data transmitted in the flowchart of FIG. 16 can be the audio data or the computer program described in each of the above embodiments. When the computer program is to be transmitted, the satisfaction of the charging condition can be added as the condition of the transmission permission in step S31.

FIG. 17 is a flowchart showing a method for receiving the transmitted audio data or program. In step S41, it is determined whether the reception is permitted. That is, by mutual authentication with the sender, if it is a legitimate receiving device (such as an authenticated receiving device),
Reception is allowed, otherwise reception is not allowed. If the reception is permitted (YES), the transmitted signal or the like is received in step S42. Then, in step S43, the original data is restored (deformatted or depacketed) from the communication format data using the packet header. The restored data is recorded in a predetermined memory in step S44. On the other hand, if the reception is not permitted in step S41 (NO), the process proceeds to step S45 and the reception is stopped (prohibited). Figure 1
As the target data received in the flowchart of 7,
The audio data or the computer program described in each of the above embodiments can be targeted. In addition,
When the computer program is to be transmitted, the satisfaction of the charging condition can be added as a condition for the reception permission in step S41.

FIG. 15 is a block diagram showing an apparatus for receiving audio data or a program transmitted by the above transmission method. In FIG. 15, circuit portions similar to those in FIG. 11 are designated by the same reference numerals. The computer 80 has a program memory 80A, and a CPU (central processing unit) (not shown) according to a program read from the program memory 80A.
Works. Audio data from the EMD site 30 is transmitted via the interface circuit 82 to the computer 8
Input to 0. The program is input from the provider 30A to the computer 80 via the interface circuit 82A. A digital output signal is output from the computer 80 via the interface circuit 45. Further, a still image signal is output from the computer 80 via the D / A TV output circuit 50, and an analog signal is output from the computer 80 via the D / A converter 47. Furthermore, from the computer 80,
Disk drive 8 via interface circuit 84
6 is supplied with data and recorded on a predetermined disc D. Data is supplied from the computer 80 to the SD memory recording device 86A via the interface circuit 84A and recorded in the SD memory 88.

FIG. 18 is a block diagram showing a modified example of the reproducing apparatus shown in FIG. 18, those parts which are the same as those corresponding parts in FIG. 11 are designated by the same reference numerals, and a description thereof will be omitted. The reproducing apparatus shown in FIG. 18 differs from the arrangement shown in FIG. 11 in that a still image interface circuit 51 is provided at the output terminal of the still image decoder 49 so as to obtain a printer output signal. The printer output signal is supplied to a printer (not shown) by wireless or wired communication to print a still image. With this configuration, for example, still image data captured by a digital camera or the like is recorded on the disc D, and the disc D
18 is loaded into the reproducing apparatus of FIG. 18, the recorded still image is read by the disc reading unit 41, and the read data is supplied to the printer via the still image decoder 49 and the still image interface circuit 51. It becomes possible to print high-definition still images. The still image data can be recorded and transmitted in the form of a packet with the data structure shown in FIG. 12, for example.

[0059]

As described above, according to the present invention, E
Since the MD content is converted into the DVD-AR content and transmitted, the digital right information of the EMD content and the digital right information of the DVD-AR content and the reproduction management data are generated and transmitted based on the additional data. The data can be transmitted regardless of the type of EMD system and the audio encoding method of EMD.

Further, since the DVD-AR contents can be used when receiving the transmitted audio data, reproduction compatibility can be ensured. Furthermore, EMD-specific functions such as check-out and check-in can be realized by using the EMD content side. Moreover, if this data structure is used, a new EMD will be created in the future.
Even if a system or an audio encoding system is introduced, it can be recorded on a recording medium.

The recording device is an EMD receiver, E
It is necessary to update the MD copyright protection encryption / decryption unit and the EMD audio decoder, but in the case where the recording device is based on a personal computer, or in the case of a device in which only the above three parts are performed by the personal computer. Can easily accommodate.

Further, according to the second embodiment of the present invention, the same effect as that of 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 recorded. Therefore, 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 effect as that of the first embodiment can be obtained, and the Usage Rule is unified to the DVD-AR Usage Rule 12, so that the check-in The DVD-AR rules are uniformly applied to check-out and move operations, and higher compatibility can be ensured.

Further, according to the fourth embodiment of the present invention, the same effect as that of the third embodiment can be obtained, and the still image data in the EMD additional data 21 can also be recorded on the DVD-.
Since the AR navigation information 11 is recorded in a controlled form, it is possible to reproduce a still image together with audio, and the still image data recording method and the navigation information 11 are also recorded based on the DVD-AR regulations. Therefore, higher compatibility can be ensured for still images.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a data structure of an audio disc used in a first embodiment of the present invention.

FIG. 2 is a block diagram showing an example of a recording apparatus used in the present invention.

FIG. 3 is an explanatory diagram showing uses and digital right information of the DVD-AR content and EMD content of FIG.

FIG. 4 is a block diagram showing an example of a reproducing apparatus used in the present invention.

FIG. 5 is an explanatory diagram showing a data structure of an audio disc used in the second embodiment.

FIG. 6 is an explanatory diagram showing a data structure of a DVD-AR disc.

FIG. 7 is an explanatory diagram showing a data structure of EMD content.

FIG. 8 is an explanatory diagram showing a data structure of an audio disc used in the third embodiment of the invention.

9 is an explanatory diagram showing uses and digital right information of the DVD-AR content and EMD content of FIG. 8. FIG.

FIG. 10 is an explanatory diagram showing a data structure of an audio disc used in the fourth embodiment of the invention.

FIG. 11 is a block diagram showing a reproducing device used in a fourth embodiment of the present invention.

FIG. 12 is an explanatory diagram showing an example of packetization according to the present invention.

FIG. 13 is a flowchart showing an outline of a recording computer program used in the present invention.

FIG. 14 is a flowchart showing an outline of a reproduction computer program used in the present invention.

FIG. 15 is a block diagram showing an example of a receiving device that receives audio data or a program transmitted using the transmission method or the information transmission / reception method of the present invention.

FIG. 16 is a flowchart showing a method of transmitting audio data or a program according to the present invention.

FIG. 17 is a flowchart showing a method of receiving audio data or a program according to the present invention.

18 is a block diagram showing a modified example of the reproducing apparatus shown in FIG.

[Explanation of symbols]

10, 10 ', 10 "DVD-AR content 11 DVD-AR navigation information (playback management data) 12 DVD-AR Usage Rule (digital right information) 12a DVD-AR copy management information (CCI) 13 DVD-AR audio object (AO
B) 20, 20A, 20B, 20 ', 20 "EMD content 21 EMD additional data 22 EMD Usage Rule (digital right information) 23, 23A, 23B EMD elementary stream 24 EMD audio object 25 still image data 31 EMD receiver 32 EMD copyright protection 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 encryption unit 38 disk writing unit 41 disk reading unit 42 DVD-AR copyright protection encryption / decryption unit 43 DVD-AR format decoder 44a DVD-AR navigation control unit 44b Usage Rule interpretation units 45, 82, 82A, 84 84A interface circuit 47 D / A converter 48 still image memory 49 the still picture decoder 50 D / A TV output circuitry 80 computer 80A the program memory 86 disk drives 86A SD memory recording device 88 SD memory D Disk

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) G11B 20/12 G11B 27/00 D 27/00 H04N 5/91 P H04N 5/91 G10L 9/00 N 9/18 J F-term (reference) 5C053 FA10 FA13 GB05 JA12 KA01 KA25 KA26 5D044 AB05 BC06 CC06 DE02 DE03 DE15 DE43 DE49 DE50 DE54 GK08 GK12 HL11 HL14 5D045 DB10 5D110 AA17 AA27 BB29 CA06 CA10 DA04

Claims (3)

[Claims] 1. An elementary stream obtained by compressing audio data using an audio encoding method, identification information indicating the audio encoding method, digital right information of the audio data, and text and still images related to the audio data. And additional data including the following, a linear PCM audio data obtained by decompressing the elementary stream, or an audio object obtained by packetizing either a temporary elementary stream obtained by further compressing the linear PCM audio data, and a digital of the audio data. The digital rights information of the audio object generated based on the rights information, and the audio object generated based on the additional data including the text and the still image related to the audio data. Audio reproduction data, and a step of packetizing data having a data structure having the audio reproduction management data, and a step of transmitting the packetized data via a communication line. 2. An elementary stream obtained by compressing audio data using an audio encoding method, identification information indicating the audio encoding method, digital right information of the audio data, and a text and a still image relating to the audio data. Recording a data group including additional data including the data on an audio recording medium,
Linear PCM obtained by expanding the elementary stream
Generates audio data or said linear PCM
Further compressing the audio data to generate a temporary elementary stream, packetizing the linear PCM audio data or the temporary elementary stream to generate an audio object, and based on the digital rights information of the audio data, Generating digital rights information of the audio object and generating reproduction management data of the audio object based on additional data including text and still image relating to the audio data; the audio object and its digital rights information And a step of recording reproduction management data in the audio recording medium, the method comprising: transmitting and receiving a recording computer program; Over a data program and transmitted into a predetermined communication format, or information transmitting and receiving method having a step of restoring said predetermined receives the converted computer program format original computer program. 3. An elementary stream, which is obtained by compressing audio data using an audio encoding method, identification information indicating the audio encoding method, digital right information of the audio data, and a text and a still image relating to the audio data. Recording a data group including additional data on an audio recording medium, and generating linear PCM audio data obtained by expanding the elementary stream, or further compressing the linear PCM audio data to generate a temporary elementary stream. Packetizing the linear PCM audio data or the temporary elementary stream to generate an audio object, and based on digital rights information of the audio data, the audio Generating digital rights information of the audio object and generating reproduction management data of the audio object based on additional data including text and still image relating to the audio data; the audio object and its digital rights information And a step of recording reproduction management data in the audio recording medium, the computer program reproducing the audio recording medium recorded by a recording method, the audio object being identification information of the audio encoding method, An information transmission / reception method for transmitting or receiving a reproduction computer program, comprising: digital right information and a step of reproducing according to reproduction management data, wherein the computer program is converted into a predetermined communication format. Transmitted, or information transmitting and receiving method having a step of restoring the original computer program to receive the converted computer program to the predetermined format Te.