JP2000305588A - User data adding device and user data reproducing device - Google Patents

Abstract

(57) [Summary] [Problem] A user data adding device and a user which simplify management of music data and user data, and which can process user data in synchronization with music and display the data on a monitor or the like at any time. Provided is a data reproducing device. The present invention provides a user data adding device and a user data reproducing device that embed user data such as a song name, a singer name, lyrics, a CD jacket and a singer's still image data into music data without separating the music data from music data. . This makes it possible to display a still image or character data while the music data is being reproduced, or to continuously display the user data in synchronization with the music.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for digitally compressing music and recording it on a recording medium, and reproducing a music stream downloaded by music distribution using a communication satellite or network music distribution using a personal computer or the like. More particularly, the present invention relates to a user data adding device and a user data reproducing device for adding text data and still image data to a compressed music stream.

[0002]

2. Description of the Related Art Music distribution using communication satellites and music distribution downloaded from a homepage on the Internet using a personal computer are examples of conventional music distribution using digital compression.

[0003] As for music distribution using a communication satellite, "Sky Perfect P" which is a PC data broadcast.
C! (SKY PerfectPC!) ". this is,
It uses a communication satellite to download homepage data, programs, and music data.

[0004] On the other hand, in order to distribute music using the Internet using a personal computer or the like, a personal computer or the like capable of downloading digitally compressed music data on the Web for a fixed fee and expanding the music data. To play.

There is also a music compression device for digitally compressing uncompressed music in real time.

[0006]

In the conventional music distribution,
This is a download of only a music stream, and a file name recorded on a recording medium such as a hard disk or a memory is accompanied by a song name or a singer name as user data. Information such as song names, singer names, still image data, etc. may also be downloaded as user data separately from music data,
In this case, the digitally compressed music data and user data need to have the same file name or be recorded in the same directory. However, it has been difficult to process music data and user data in synchronization with each other, for example, to display lyrics at any time in time with music.

[0007] When music is recorded in real time, there is only music and no user data.

[0008]

In order to solve the above-mentioned problems, according to the present invention, user data such as a song name, a singer name, lyrics, a CD jacket and a singer's still image data are embedded in music data without being separated from the music data. An apparatus and a user data reproducing apparatus are provided. This makes it possible to display the user data while the music data is being reproduced, or to continuously display the user data in synchronization with the music.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

[0010] As a device for adding music title / singer name, lyrics, CD jacket or singer still image data as user data, the user data is added while compressing music in real time. A method of adding user data to a music stream recorded on a recording medium such as a memory will be described.

As a first embodiment, a case where user data is added while music from a microphone or an external device is compressed in real time will be described. The case of MPEG Audio Layer II as a digital compression method for music will be described with reference to FIGS.

In FIG. 1, reference numeral 101 denotes an image input terminal;
02 is a music input terminal, 103 is a text input terminal, 10
4 is a still picture encoder, 105 is a music encoder, 10
Reference numeral 6 denotes a switch, 107 denotes a voice recognition unit, 108 denotes a still image addition unit, 109 denotes a text addition unit, 110 denotes a synchronous text addition unit, 111 denotes a user data addition device, and 112 denotes a recording medium such as a hard disk or a memory.

An image pickup device such as a camera is connected to the image input terminal 101, a microphone or a music reproducing device is connected to the audio input terminal 102, and a keyboard or the like is connected to the text input terminal 103. Music taken from the music input terminal 102 is digitally compressed by a music encoder 105 to generate a music stream. Next, the switch 106 switches to a still image adding unit 108, a text adding unit 109, and a synchronous text adding unit 110 according to the user data to be added. In the still image adding unit 108, the image input by the image input terminal 101 is added to the music stream generated by the music encoder 105.
By JPEG (Joint PhotographicCoding Experts
Group), GIF (Graphics Interchange Format) and the like. The text adding unit 109 adds text data input from the text input terminal 103 using a keyboard or the like to the music stream generated by the music encoder 105. In the synchronous text adding unit 110, the music recognition unit 107 recognizes the lyrics from the audio information based on the music data input from the music input terminal 102, converts the lyrics into text, and adds the lyrics to the music stream generated by the music encoder 105.

Here, the music stream generated by the music encoder 105 will be described with reference to FIG.

In FIG. 15, reference numeral 1501 denotes an AAU (Audio Access Unit) constituting a music stream, which is a minimum unit that can be decoded into a music signal by itself. AAU 1501 consists of header 1502, bit allocation 1503, SCFS
I (Scalefactor Selection Information) 1504, scale factor 150
5, sample 1506.

As a first specific example, a music stream generated by the text adding unit 108 when a text of a song name / singer name with a small data amount is added as user data will be described with reference to FIG.

In FIG. 5, reference numeral 501 denotes silence data;
2 is user data, 503 is music data, 504 is music data, 505 is silence data, and 506 user data. A piece of music stream from the silence data 501 to the music data 504 is a music stream for one music piece, and the music stream after the silence data 505 is a music stream of the next music piece. In this case, the first AAU among the plurality of AAUs constituting each music stream is composed of the silent data 501 and the user data 502, that is, the user data 502 is added to the silent data 501.

Here, a method of creating the silent data 501 will be described. MPEG Audio, Layer II, sampling frequency 48 kHz, bit rate 256 kbp
In the case of s and stereo, 1 AAU is 6144 bits. For silence data, 32 bits of header 1602 are set to 0x
FFFDC40C and the header (32 bits) by setting all 88 bits of bit allocation 1603 to 0
And silence data can be formed by only 120 bits of bit allocation (88 bits). That is, 1AA
The remaining 6144-120 = 6024 bits of U can be allocated to user data.

Next, a method of extracting user data will be described with reference to FIG. In FIG. 16, 1601
Is a recording medium, 1602 is a music decoder, 1603 is a user data determination unit, 1604 is a switch, 1605 is a still image decoder, 1606 is a text display unit, 1607 is a user data reproducing device, 1608 is an image output terminal,
609 is a music output terminal.

The music data stream with user data read from the recording medium 1601 is
The signal is decoded at 602 and output from a speaker connected to the music output terminal 1609.

The user data determination unit 1603 checks data from the data after the music is decoded to the header of the next AAU. Normally, the encoder compresses music data while calculating to fill almost 1 AAU,
All remaining parts are padded with 0s and 1s. Therefore, when all data are 0 or 1 until the next AAU, there is no user data, and nothing is output from the image output terminal 1608. If the header of the still image data such as JPEG or GIF is not found by the next AAU, it is regarded as text data, the text is decoded by the text display unit 1606, and the text is displayed on a monitor or the like connected to the image output 1608. In addition, since there is usually no silent AAU, in the case of a silent AAU, the processing may be performed as an AAU including user data.

On the other hand, it is assumed that an AAU composed of silence data and user data is decoded by a reproducing apparatus having no function of processing user data other than the user data reproducing apparatus 1607. In this case, only the silent data is processed, and the subsequent user data is ignored. For this reason, no sound is heard from the speaker and silence is reproduced, so that there is no influence. The reproduction time of 1 AAU is 1/48 because 1152 samples are included in 1 AAU.
(KHz) × 1152 = 24 (ms). Therefore,
In the case of the configuration of the music stream shown in FIG. 1, silence data is 24 ms due to the connection between songs.

As a second specific example, JPEG (Joint Photographic Coding Experts Group) is used as user data.
p), a CD jacket or a singer's still image data of one singer compressed by GIF (Graphics Interchange Format) or the like, and a music stream generated by the still image adding unit when the size is relatively small, using FIG. explain.

In FIG. 6, reference numeral 601 denotes silence data;
2 is user data, 603 is silence data, 604 is user data, 605 is music data, and 606 is music data. The music data for one music is from the silence data 601 to the music data 606.

Even a relatively small amount of still image data compressed by JPEG, GIF, or the like requires a user data size of several kilobytes to several tens of kilobytes. Therefore, since one AAU composed of the silence data and the user data is not enough, several AAUs are prepared so as to match the still image data amount. In the structure of the silence data and the user data, 6024 bits can be used for the user data as described above. For example, when still image data of 1 kbytes (1024 × 8 = 8192 bits) is used as user data, this can be coped with by using two AAUs of silence data and user data.

FIG. 1 shows how to retrieve user data.
6 will be described.

In FIG. 16, a music data stream with user data read from a recording medium 1601 is decoded by a music decoder 1602 and output to a music output terminal 1609. As in the case of the specific example 1, the user data determination unit 1603 checks data from the data after music decoding to the header of the next AAU. When all data are 0 or 1 until the next AAU, it is determined that no user data exists and the image output terminal 1608 is used.
Does not output anything. JPEG and G by the next AAU
When the header of the still image data such as IF is found, the switch 1604 processes the still image decoder 1605 and outputs the still image to a monitor or the like connected to the image output, but the still image data does not fit in 1 AAU. In this case, it is assumed that the next AAU also has remaining data, the still image decoder process is performed, and the data is output from the image output terminal.

As a third specific example, FIG. 1 shows a case where the size of one still image data is relatively large and is several tens kbytes to several hundreds kbytes, or a case where several still image data are used as user data. This will be described with reference to FIG. In this case,
If the configuration of silence data and user data is the same as the configuration of AAU shown in FIG. 6, the size of the user data is large, so that the number of AAUs of the configuration of silence data and user data increases. Therefore, when this music stream is decoded, silence is long. Therefore, when the user data size is large, the music stream is configured as shown in FIG.

In FIG. 7, reference numeral 701 denotes music data;
2 is user data, 703 is music data, 704 is user data, 705 is music data, 706 is user data, and 707 is music data. The music data from 701 to 707 is music data for one music. In this way, music data and user data are used for AA
By configuring U, silence can be eliminated.
However, in this case, the music data must be compressed by the music encoder 105 in consideration of the size used as the user data.

For example, 10 kbytes (10 × 1024 ×
When still image data of 8 = 81920 bits) is used as user data, 6044 bits out of 6144 bits of 1 AAU
Bits are allocated to music data 701 and the remaining 100 bits are allocated to user data 702. With such an assignment, 81920/100 = 819.2, and 820 AAUs can be realized by having the configuration of the music data 701 and the user data 702. 1 AAU
Is 24 ms, so a music stream of 820 × 24 = 19680 ms is composed of music data and user data.

The method of extracting the user data is the same as that in the above-described specific example 2, and therefore will not be described.

As a fourth specific example, a case in which lyrics are displayed on a screen in synchronization with music will be described with reference to FIGS.

In FIG. 8, reference numeral 801 denotes music data;
2 is user data, 803 is music data, 804 is user data, 805 is music data, 806 is user data, 807 is music data, and 808 is user data. The music data from 801 to the user data 806 is a music stream for one music, and the music data after 807 shows music data of the next music.

In FIG. 1, music input from the music input terminal 102 is recognized by a voice recognition unit 107 as text data. The synchronous text adding unit 110 adds text data to the music stream output from the music encoder 105 as needed. As in the case of the third embodiment, the music encoder 105 creates a music stream in which the user data portion is previously empty.

FIG. 1 shows how to retrieve user data.
6 will be described. In FIG. 16, the recording medium 160
The music stream with user data read from 1 is decoded by the music decoder 1602 and output from the music output terminal 1609. On the other hand, the user data determination unit 1603 determines the next A
Check the data up to the header of the AU. If all data are 0 or 1 until the next AAU, no data is output from the image output terminal 1608 on the assumption that no user data exists. When the header of the still image data such as JPEG or GIF is not found by the next AAU, the user data is sent to the text display unit 1606 as text data and output from the image output unit 1608 as needed.

As a second embodiment, a method for adding user data to a music stream once recorded on a recording medium such as a hard disk or a memory from a music stream distributed using a communication satellite or a network will be described. 3 and 4 show a method of downloading music data to a recording medium.
This will be described with reference to FIG.

FIG. 3 is a diagram for explaining how to download using a communication satellite. In FIG. 3, reference numeral 301 denotes a parabolic antenna, 302 denotes a receiving board, 303 denotes a recording medium, and 304 denotes a personal computer. The music stream of several channels sent from the communication satellite is parabolic antenna 301
Only the music stream or the sampled music stream which is received by
3 recorded. After that, the downloaded music stream is expanded and reproduced by a personal computer or the like.

FIG. 4 is a diagram for explaining how information on the Internet is downloaded via a telephone line or the like.
In FIG. 4, reference numeral 401 denotes the Internet, 402 denotes a modem, 403 denotes a recording medium, and 404 denotes a personal computer.
In this case, the music data is registered as a file on the Web, and a fixed fee is paid to the modem 40 using a telephone line.
2 to the recording medium 403. After that, the downloaded music stream is expanded and reproduced by a personal computer or the like.

First, the operation of adding user data to a music stream downloaded to a recording medium will be described with reference to FIG. In FIG. 2, 201 is a recording medium,
202 is a switch, 203 is a music decoder, 204 is a music encoder, 205 is a voice recognition unit, 206 is a still image addition unit, 207 is a text addition unit, 208 is a synchronous text addition unit, and 209 is a user data addition device.

For digital compression in music distribution using a communication satellite or a network, MPEG Audio, Layer
MPEG Audio, Laye with higher compression than rII
rIII (MP3) is often used.

As in the case of the first embodiment, the user data may be music name / singer name, lyrics, CD jacket or singer still image data. A music stream generated by using the present invention in each case will be described.

As a first specific example, a case where text data of a song name / singer name with a small data amount is used as user data will be described with reference to FIGS.

In FIG. 9, reference numeral 901 denotes silence data;
2 is user data, 903 is music data, and 904 is music data.

In FIG. 2, the music stream read from the recording medium 201 is sent to the text adding unit 207 by the switch 202, the text data is added by the text adding unit 207, and is recorded on the recording medium 201.

When the text data of the song name / singer name having a small data amount is used as the user data, as shown in FIG. 9, the first AAU in the AAU constituting the music stream is used.
The AU is realized by including the silence data 901 and the user data 902, that is, adding the user data 902 to the silence data 901.

On the other hand, since the downloaded audio stream is one file for each song, the AAU at the end of the file (the end of the song) can be easily searched. Therefore, FIG.
0, the AAU including the user data at the end of the file (silent data 1003, user data 1003).
This can also be realized by adding 4).

FIG. 1 shows how to retrieve user data.
6 will be described.

In FIG. 16, a music data stream with user data read from a recording medium 1601 is decoded by a music decoder 1602 and output from a music output terminal 1609. User data determination unit 16
03 is the next AAU from the data after the music is decoded.
Check the data up to the header. If all data are 0 or 1 until the next AAU, no data is output from the image output terminal 1608 on the assumption that no user data exists. Next A
If the header of the still image data such as JPEG or GIF is not found before the AU, the data is determined to be text data, processed by the text display unit 1606, and output from 1608.

As a second specific example, the case where the user data is a CD jacket compressed by JPEG, GIF or the like or still image data of one singer and the size is relatively small will be described with reference to FIGS. explain.

In FIG. 11, reference numeral 1101 denotes silence data;
1102 is user data, 1103 is silence data, 1
104 is user data, and 1105 is music data.

Even when the size of the compressed still image data is small, a user data size of several kbytes to several tens kbytes is required. Therefore, since one AAU composed of silent data and user data is not enough, it is realized by adding several AAUs to the head of the file so as to match the amount of still image data. In addition, as shown in FIG. 12, this can be realized by a configuration in which several AAUs (silent data 1204, user data 1205) including user data are added at the end.

As a third specific example, FIG. 13 shows a case where the size of one still image data is relatively large, several tens kbytes to several hundreds kbytes, or a case where several still image data are used as user data. It will be described using FIG. In this case, FIG.
1. If the AAU having the structure of silence data and user data shown in FIG. 12 has a large user data size, the AAU having the structure of silence data and user data increases. Therefore, when this music stream is decoded, silence continues for a long time. In this case, the music stream is configured as shown in FIG.

In FIG. 13, reference numeral 1301 denotes music data;
1302 is user data, 1303 is music data, 1
Reference numeral 304 denotes user data, and 1305 denotes music data.

Music data 1301 and user data 13
The AAU 02 can eliminate silences, but in this case, it is necessary to recompress the music data in consideration of the size used as user data in advance. The operation at this time will be described with reference to FIG.

In FIG. 2, a music stream read from a recording medium 201 is sent to a music decoder 203 by a switch 202. Then, the music encoder 204
Then, the music data is recompressed in consideration of the size used as the user data in advance. Still image addition unit 206
Then, the still image data read from the recording medium 201 is added to the music stream generated by the music encoder 204 so as to have the configuration shown in FIG.
Record in 1.

As a fourth specific example, a case where text such as lyrics is displayed on a screen in synchronization with music is shown in FIGS.
This will be described with reference to FIG.

In FIG. 2, a music stream read from a recording medium 201 is sent to a music decoder 203 by a switch 202. Then, the music encoder 204
Then, the music data is recompressed in consideration of the size used as the user data in advance. On the other hand, the output of the music decoder 203 is input to the speech recognition unit 205, which recognizes the speech and outputs text data, and outputs the text data.
8 to add to the music stream output from the music encoder 204 as needed. After that, it is recorded on the recording medium 201.

Next, the music stream generated by the synchronous text adding unit 208 will be described.

In FIG. 14, reference numeral 1401 denotes music data;
1402 is user data, 1403 is music data, 1
404 is user data, 1405 is music data, 14
06 is user data.

As described above, all the AAUs are realized by the configuration of music data and user data.

FIG. 1 shows how to retrieve user data.
6 will be described. In FIG. 16, the recording medium 160
The music stream with user data read from 1 is decoded by the music decoder 1602 and output from the music output terminal 1609. On the other hand, the user data determination unit 1603 determines the next A
Check the data up to the header of the AU. If all data are 0 or 1 until the next AAU, no data is output from the image output terminal 1608 on the assumption that no user data exists. When the header of the still image data such as JPEG or GIF is not found by the next AAU, the user data is sent to the text display unit 1606 as text data and output from the image output terminal 1608 as needed.

[0062]

According to the present invention, song names, singer names, lyrics, CDs
By embedding user data such as jacket and singer still image data in music data without separating it from music data, management of music data and user data is simplified, and user data is processed in synchronization with music. Provided are a user data adding device and a user data reproducing device that can be displayed on a monitor or the like at any time.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of a user data adding device according to the present invention.

FIG. 2 is a diagram showing a second embodiment of the user data adding device of the present invention.

FIG. 3 is a diagram showing how music data is downloaded using a communication satellite.

FIG. 4 is a diagram showing how music data is downloaded from a network.

FIG. 5 is a diagram showing a first specific example of a configuration diagram of a music stream generated by the user data adding device of FIG. 1;

FIG. 6 is a diagram showing a second specific example of a configuration diagram of a music stream generated by the user data adding device in FIG. 1;

FIG. 7 is a diagram showing a third specific example of a configuration diagram of a music stream generated by the user data adding device in FIG. 1;

8 is a diagram showing a fourth specific example of a configuration diagram of a music stream generated by the user data adding device in FIG. 1. FIG.

9 is a diagram illustrating an example of a first specific example of a configuration diagram of a music stream generated by the user data adding device in FIG. 2;

FIG. 10 is a diagram illustrating another example of the first specific example of the configuration diagram of the music stream generated by the user data adding device in FIG. 2;

11 is a diagram illustrating an example of a second specific example of a configuration diagram of a music stream generated by the user data adding device in FIG. 2;

12 is a diagram showing another example of the second specific example of the configuration diagram of the music stream generated by the user data adding device in FIG. 2;

13 is a diagram illustrating a third specific example of a configuration diagram of a music stream generated by the user data adding device in FIG. 2;

FIG. 14 is a diagram showing a fourth specific example of a configuration diagram of a music stream generated by the user data adding device in FIG. 2;

FIG. 15 is a diagram illustrating a configuration of a conventional music stream.

FIG. 16 is a diagram showing an embodiment of a user data reproducing device of the present invention.

[Explanation of symbols]

 101 image input terminal 102 music input terminal 103 text input terminal 104 still image encoder 105 music encoder 106 switch 107 voice recognition unit 108 Still image adding unit 109: text adding unit 110: synchronous text adding unit 111: user data adding device 112: recording medium

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G10L 19/00 G10L 9/18 M H04N 5/765 H04N 5/781 510L 5/781 5/91 R 5/91 F term (Reference) 5C053 FA08 FA10 FA27 GB11 GB36 LA02 LA11 5D015 KK02 5D045 AB01 DA20

Claims (24)

[Claims] 1. An image input terminal for inputting an image, a music input terminal for inputting music, a text input terminal for inputting text, a still image encoder for compressing the input image, and the input music A music encoder, a switch for distributing the compressed music stream to a still image adding section, a text adding section, or a synchronous text adding section, and a voice recognizing section for recognizing voice from the input music and converting it to text data. A still image adding unit that adds compressed still image data to the compressed music stream; a text adding unit that adds text data input from a text input terminal to the compressed music stream; And a synchronous text adding unit for adding data transcribed by the voice recognition unit to the music stream obtained User data addition device comprising and. 2. A switch for distributing a compressed music stream to a still image adding section, a text adding section, or a synchronous text adding section, a music decoder for expanding the compressed music stream, and a decoder for reproducing the expanded music data. A music encoder for compressing, a voice recognition unit for recognizing voice from the expanded music data to text data,
A still image adding unit that adds compressed still image data to the compressed music stream, a text adding unit that adds text data to the compressed music stream,
A user data adding device, comprising: a synchronous text adding unit that adds data converted to text by a voice recognition unit to the compressed music stream. 3. A music decoder for expanding a compressed music stream, a user data judging unit for judging whether there is data other than music data of the expanded music stream, and a still image decoder or text for decoding the user data. A switch for sending to a display unit, the still image decoder for expanding the compressed still image data, the text display unit for processing text user data, an image output terminal for outputting the still image or the text, And a music output terminal for outputting the music data. 4. The user data adding apparatus according to claim 1, wherein the still image adding unit generates the music stream by embedding still image data as user data. 5. The user data adding apparatus according to claim 1, wherein the text adding section generates the music stream by embedding character data as user data. 6. The user data adding device according to claim 1, wherein said synchronous text adding unit generates character data synchronized with music as user data when generating the music stream. 7. The audio access unit (AAU) according to claim 1, wherein the still image adding unit or the text adding unit is a head of an audio access unit (AAU) of the music in the music stream.
(A unit) for generating a music stream composed of silence data and user data. 8. The still image adding unit or the text adding unit according to claim 1, wherein a few AAUs (Audio Access Units) from the beginning of the music of the music stream are composed of silent data and user data. A user data adding device for generating a music stream composed of data. 9. The method according to claim 1, wherein the still image adding section or the text adding section includes several AA of the music stream.
A user data adding device, wherein a U (Audio Access Unit) generates a music stream composed of music data and user data. 10. The synchronizing text adding unit according to claim 1, wherein all of the AAUs (Audio
A user data adding device, wherein an access unit (audio access unit) generates a music stream composed of music data and user data. 11. The audio encoder according to claim 1, wherein the music encoder comprises one audio access unit (AAU).
A user data adding device for performing compression processing while leaving a user data area in advance in an access unit. 12. The user data adding apparatus according to claim 2, wherein the still image adding section generates the music stream by embedding still image data as user data when generating the music stream. 13. The user data adding apparatus according to claim 2, wherein the synchronous text adding unit generates character data synchronized with music as user data when generating the music stream. 14. The user data adding device according to claim 2, wherein the synchronous text adding unit embeds character data synchronized with music as user data when generating the music stream. 15. The still image adding unit or the text adding unit according to claim 2, wherein an AAU (Audio Access Unit) at the head of the music in the music stream is composed of silence data and user data. A user data adding device for generating a reproduced music stream. 16. The apparatus according to claim 2, wherein the still image adding unit or the text adding unit comprises a plurality of AAUs (Audio Access Units, audio / audio units) from the beginning of the music in the music stream.
An access unit for generating a music stream composed of silence data and user data. 17. The music image processing apparatus according to claim 2, wherein the still image adding section or the text adding section includes a plurality of A streams of the music stream.
A user data adding device, wherein an AU (Audio Access Unit) generates a music stream composed of music data and user data. 18. The apparatus according to claim 2, wherein said synchronous text adding unit includes all AAUs (Audios) of the music stream.
Access Unit, audio access unit)
A user data adding device for generating a music stream composed of music data and user data. 19. The still image adding unit or the text adding unit according to claim 2, wherein the last AAU (Audio Access Unit) of the music in the music stream is composed of silence data and user data. A user data adding device for generating a reproduced music stream. 20. The apparatus according to claim 2, wherein the still image adding unit or the text adding unit includes a plurality of AAUs (Audio Access Units, audio / audio units) from the end of the music in the music stream.
An access unit for generating a music stream composed of silence data and user data. 21. The apparatus according to claim 2, wherein said music encoder performs compression processing while leaving a user data area in an AAU (Audio Access Unit) in advance. apparatus. 22. An apparatus according to claim 3, wherein said user data determination section is configured such that data up to the next AAU (Audio Access Unit) following silence data or music data is all other than 0 or all other than 1. A user data reproducing apparatus characterized in that, in such a case, processing is performed by regarding the user data as user data. 23. The apparatus according to claim 3, wherein the user data determination unit determines the next A when the AAU (Audio Access Unit) is silent data.
A user data reproducing apparatus which performs processing by regarding data up to an AU as user data. 24. The user data judging section according to claim 22, wherein the user data determination section searches a header of the compressed still image in the user data, and when the header is found, the user data is compressed. A user data reproducing apparatus, wherein the user data reproducing apparatus determines that the data is data, and determines that the data is text data when a header is not found.