JP2003263837A - Method for encoding voice signal, and device for reproducing voice signal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reproduce musical pieces by dividing one or more musical pieces including an original musical piece into groups without complicating a configuration and an operation at a reproduction side, and transmitting them. <P>SOLUTION: A data structure including a first title group constituted of audio titles comprising the original musical piece, a second title group constituted of audio titles comprising bonus information, interactive data for accessing the bonus information, and a search pointer with which a reproducing device searches the audio titles, is transmitted through a recording medium or a communication medium. The reproducing device side permits the reproduction of the musical pieces in the group where inputted interactive data coincide with transmitted interactive data, and then reproduces them on the basis of transmitted reproduction control information. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-channel audio signal encoding method and reproducing apparatus.

[0002]

2. Description of the Related Art DVDs (digital video discs,
The digital versatile disc) has a larger capacity than that of a CD (compact disc), and thus is also attracting attention as an audio disc for music and the like. However, since a DVD can be recorded at a higher density than a CD and the recording time is long, how to use this as a music recording medium has been an issue. For example, in addition to the original music as a music source, its karaoke and B
If it can be selectively played back as a GM, the user can enjoy more. In addition, it is desired to use the method so that the user can enjoy it more and more as he or she repeatedly performs the reproducing operation.

Therefore, the inventor of the present invention filed an earlier application (Japanese Patent Application No. 9-
176517), one or more songs and a bonus for the songs in order to allow the disc producer to use the disc in a wide variety of ways and to allow the user to perform a wide variety of playbacks. It proposes a method of recording information and interactive data (password) for accessing bonus information on a DVD audio disc, and permitting reproduction of bonus information when a correct password is input on the reproducing side.

According to this method, for example, an original song and karaoke as bonus information about the song,
Data such as BGM, MIDI, and practice voice at the time of recording are recorded, and the original music is allowed to be played back for free, but as for the bonus information, the personal identification number that the user has learned on condition of payment of the consideration is input as interactive data. In such a case, a usage mode in which reproduction is permitted can be considered. Also, the original music is unconditionally allowed to be played, but the bonus information is such that a quiz is presented to the user via the video means and the user is allowed to play the correct answer as interactive data. It can be used in various ways.

Further, in the present application, the inventor of the present application provides a DVD audio disc with a program for dividing one or more music pieces into groups and playing each group and interactive data (password) for accessing the music pieces for each group. It proposes a method of permitting the reproduction of the music recorded in the group and the input interactive data and the transmitted password agree with each other.

According to this method, for example, an original music group is grouped into a music group in which the playing method and the singing style are changed, or the original music group is divided into each music group such as karaoke, BGM, and MIDI. And record. Then, when the user inputs a group number known as a password free of charge, or a personal identification number for each group acquired on condition of payment of consideration, a usage mode in which reproduction of the group is permitted can be considered.

[0007]

[Problems to be Solved by the Invention] (1) However,
As described above, if the disc maker can use the disc in various ways and the user can perform various reproductions, the disc maker has recorded a bonus song on which disc. There is a problem that it is not easy to manage whether or not it has been recorded, and it is not possible for the user to easily know to which disc the bonus song is recorded or not recorded. Occurs (first problem).

(2) If the original music and the bonus music are recorded together on the disc, or if one or more music including the original music is grouped and recorded together on the disc, the reproducing apparatus On the side, when reproducing the original music, there arises a problem that it cannot be reproduced at the same high speed as a normal disc (second problem).

Further, not only the data recorded on the disk but also the data transmitted through the communication line and reproduced by the reproducing device, that is, the receiving device side has the same problem. It is an object of the present invention to provide an audio signal encoding method and a reproducing apparatus that solve the above problem.

[0010]

The present invention comprises the following means. That is,

1) A step of A / D converting an analog audio signal of an original music piece to generate a digital data string, and a unit of data including a music piece is set as one audio title in a recording area of a disc, and a plurality of reproducing apparatuses are used. The first audio title including the original music piece is provided in the first to (n-1) th units, each of which is a unit for continuously playing the music piece by accessing the audio title. One or more first title groups composed of a first audio title including a plurality of audio objects (AOB);
A second audio title that is provided at the last nth time when desired and includes bonus information, and is a second audio title that includes a second audio title that includes a plurality of audio objects (AOB);
Interactive data as data for accessing the second title group of the bonus information, and data for indicating that the second title group of the bonus information does not exist, and the playback device displaying the audio title. A first AOB having a search pointer for searching and a still picture set (SPS), the AOB being constituted only by a first pack having audio data as actual data, and the first pack. , And a second AOB composed of a second pack having real-time information data relating to the audio data as actual data, and the SPS further includes a third AOB including still picture data relating to the audio data. Having a pack, the plurality The AOB has audio title set information (ATSI) including control information (ATS-PGCIT) for reproduction in the reproduction order, and this ATSI controls the page for the still picture data in the SPS (SPCIT). ), And is formatted into a data structure for recording. 2) The first title group including the original song and the second title group including the bonus information are A
The encoding method according to claim 1, wherein the encoding method comprises an OTT audio title and an AVTT audio title. 3) A reproducing device for a signal recorded by the encoding method according to claim 1 or 2, wherein the input means for inputting interactive data for accessing the bonus information, and the search regardless of the input interactive data. The first title group is accessed based on the pointer to play the audio data of the original song unconditionally, and when the input interactive data matches the recorded interactive data, the first title group is accessed based on the search pointer. A reproducing means for accessing the second title group to reproduce the bonus information, a first decoding means for decoding control information (SPCIT) for page control of the still picture data from the recorded ATSI, and the recorded means. Still picture set And second decoding means for decoding the still picture data from the third pack are arranged in SPS), based on at least the first SPCIT retrieved from the decoding means at the time of the reproduction, the second
And a output unit for controlling and outputting the still picture data extracted by the decoding unit.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing a format of a DVD-audio disc as a first embodiment of an information recording medium to which the present invention is applied.

In the format of the DVD-audio disc shown in FIG. 1 as the first embodiment of the information recording medium to which the present invention is applied, SAMG (Structure / Structure) is formed under ATS-D (Audio Title Set-Directory). Of Simple Audio Manager / Stru
cture of Simple Audio Manager), AMG (audio manager), SPS (still picture set), and a plurality (m) of ATS <1> to ATS <m> managed by AMGI in AMG. It is provided.
SAMG is an area in which a SAPP table (TOC) for cueing ATS <1> to ATS <m> is repeatedly described eight times. This area can be defined as one independent file.

AMG is AMG information (AM
GI), AMG menu (AMGM) and backup AMGI (AMGI-BUP), and AMGI (and AMGI-BUP) includes AMGI management table (AMGI-MAT) shown in detail in FIG. AM
The GI-MAT includes interactive data (password) for accessing bonus information, and this password is represented by, for example, a four-digit number or code. Then, for example, when the password is 0000, it means that the bonus information is not provided, and the password is 000.
When it is not 0, it indicates that the bonus information is provided, and also indicates the actual password. SPS (Still
Picture set) includes still image data.

ATS <1> to ATS <m> are audio data of normal music (hereinafter referred to as non-bonus music), karaoke music as bonus music, audio data such as BGM, and other than audio data, such as karaoke music. Includes subtitles, MIDI code, and quiz data. The composition of this ATS is free for the disc creator,
The above non-bonus music and bonus music are arranged in an arbitrary ATS.

The AMGI, as shown in detail in FIG. 2, includes: an audio manager information management table (AMGI-MAT), an audio title search pointer table (ATT-SRPT), and an audio Only title search pointer
A table (AOTT-SRPT), an audio manager menu, a PGCI unit table (AMGM-PGCI-UT), and an audio text data manager (ATX)
TDT-MG).

AOTT-SRPT is: audio only title search pointer
Table information (AOTT-SRPT
I) and a plurality of audio only title search pointers (AOTT-SRPs). AOTT-
As shown in detail in FIG. 3, the SRPTI is composed of 4 bytes: 2-byte audio-only title search
Number of pointers (AOTT-SRP-Ns), and 2-byte audio-only title search
End address of pointer table (AOTT-SR
PT-EA).

Each of the plurality of AOTT-SRPs shown in FIG. 2 is composed of 12 bytes as shown in detail in FIG. 4, and is composed of: 1-byte audio title category (ATT)
-CAT) and 1 byte number of programs in AOTT (AOTT-
PG-Ns), 4-byte total playback time of AOTT (AOTT-PB-TM), 1-byte ATS number (ATSN), 1-byte ATS title number (ATS- TT
N), and a 4-byte start address of ATS (ATS-S
A) and.

Audio title category (ATT
As shown in detail in FIG. 5, 1-bit (b7) AOTT presence / absence area, 3-bit (b6-b4) reserved area, and 4-bit (b3-b0) AOTT Belongs to A
And an OTT group number (AOTT-GRN). However, AOTT existence bit b7 = 0b: AOTT is absent = 1b: AOTT is present

The 4-byte AOTT total playback time (AOTT-PB-TM) shown in FIG.
The total presentation time (reproduction output time) of this AOTT is represented by 1/90000 (second) per bit.

ATS <1> to ATS <m> shown in FIG.
As shown in detail in FIG. 6, each is in order from the beginning: ATSI (ATS information), audio object set for audio-only title (AOTT-AOBS) shown in detail in FIG. 7, and backup And ATSI. A
The TSI is in order from the top: ATSI-MAT (ATSI management table), and ATS-PGCIT (AT shown in detail in FIGS. 8 to 14.
S program chain information table).

As shown in detail in FIG. 7, the AOTT-AOBS is composed of a plurality of audio objects for audio-only titles (AOTT-AOB). Each of the AOTT-AOB is composed of a plurality of programs (PG), and each of the programs is composed of a plurality of cells (ATS-C). AOTT-A
There are two types of OBs, one containing only audio data as shown in detail in FIG. 7 (1) and one containing audio data and real time information data (RTI data) as shown in detail in FIG. 7 (2). AO
It is composed of TT-AOB. Then, one or more types of AOTT-AOB are arranged in one disc or one piece of music.

First AOT containing only audio data
Each program of T-AOB includes a plurality of audio cells (A
TS-C), and this audio cell is composed only of a plurality of audio packs. Second AOTT-A including audio data and RTI data
Each OB program has a plurality of audio cells (ATS-
This audio cell is composed of an RTI pack arranged at the second pack position and an audio pack arranged at another pack position.

The ATS-PGCIT (ATS shown in FIG.
As shown in detail in FIG. 8, the program chain information table) includes, in order from the beginning, audio title set PGCI table information (ATS-PGCITI), and n audio title set PGCI search pointers (ATS-). PGCI-SRP # 1 to #n) and a plurality of ATS-PGCIs shown in detail in FIG.

Each of the ATS-PGCIs is, in order from the beginning as shown in FIG. 9, ATS-PGC general information (ATS-PGC-GI) detailed in FIG. 10, and detailed in FIGS. An ATS program information table (ATS-PGIT) and an ATS cell playback information table (ATS-C-PBIT).

As shown in FIG. 10, the ATS-PGC-GI is composed of 16 bytes (RBP0 to 15), and 4 bytes (RBP0 to 3) of ATS-PGC contents (ATS-PGC-CNT) in order from the beginning. , 4 bytes (RBP4-7) ATS-PGC playback time (ATS-PGC-PB-TM), 2 bytes (RBP8, 9) reserved area, 2 bytes (RBP10, 11) ATS-PGIT start address and 2 bytes (RBP12, 13) ATS-C-PBI
It consists of a T start address and a 2-byte (RBP14, 15) reserved area.

The ATS program information table (ATS-PGIT) shown in FIG. 9 is shown in FIG.
As shown in detail in FIG. 1, it is composed of n pieces of ATS program information (ATS-PGI) # 1 to #n. Each of ATS-PGI # 1 to #n is shown in FIG.
It is composed of 20 bytes (RBP0 to 19) in order from the beginning. ・ 4 bytes (RBP0 to 3) of ATS-PG content (ATS-PG-CNT) and ・ 1 byte (RBP4) of ATS-. Entry cell number of PG, 1 byte (RBP5) reserved area, 4 bytes (RBP6-9) start presentation time (FAC-S-PTM) of the first audio cell of ATS-PG , 4 bytes (RBP10 to 13) ATS-PG playback time, 4 bytes (RBP14 to 17) ATS-PG pause time, 1 byte (RBP18) reserved area (copyright management data) CMI) and 1 byte (RBP19) reserved area.

The ATS cell playback shown in FIG.
Information table (ATS-C-PBI
T) is the n number of ATS cells, as shown in detail in FIG.
Playback information (ATS-C-PB
I) It is composed of # 1 to #n. ATS-C-
Each of the PBIs # 1 to #n is composed of 12 bytes (RBP0 to 11) as shown in detail in FIG. 14, and from the beginning, an ATS-C index number of 1 byte (RBP0), and 1 byte ( RBP1) ATS-C type (ATS-
C-TY), 2 bytes (RBP2, 3) reserved area, 4 bytes (RBP4-7) ATS-C start address, 4 bytes (RBP8-11) ATS-C end And an address.

In FIG. 15, the player (playback device) is set to the above A.
The data structure when reproducing audio data based on the reproduction control information in MGI and ATSI is shown. First, one album shows the audio data of the entire one side of the disc, which is the entire one side in the case of a single sided disc and the entire one side in the case of a double sided disc. That is, the audio data of the single-sided disc is composed of one album, and the audio data of the double-sided disc is composed of two albums. One album is composed of 1 to 9 groups # 1 to #n (hereinafter referred to as a title group).
It is composed of 9 title groups. Then, all the bonus songs are arranged in the last title group #n. This one title group is a unit when the player plays back continuously.

One title group is a unit when a player continuously reproduces a plurality of audio titles (ATTs), and is composed of an arbitrary number (i, j in the figure) of ATTs. The disc creator can freely select the number of ATTs i and j in one title group. These ATT # 1 to ATT # i and ATT # j are shown in FIG.
Any of the ATS <1> to ATS <m> shown in
T, which is searched and reproduced by the player based on the reproduction control information in the AMGI and ATSI. Here, the ATT is an audio-only title (AOTT) that includes audio data but does not include video data.
Audio / video title (AVT) including this AOTT and video data.
There are two types, that is, T). In addition,
ATS of the DVD-audio disc shown in FIG. 1 and FIG.
0 (discussed below) indicates that the ATS of the DVD-Avd disc is A
Includes OTT only. In addition, the DVD-Avd shown in FIG.
The VTS of the disc contains only AVTT.

FIG. 16 shows an encoding device applied to the present invention. Original music, karaoke music, B
The audio signal A such as GM is converted into a digital signal by the A / D converter 31, and then applied to the signal processing circuit 32. The signal processing circuit 32 and the memory 33 output this digital audio signal as it is to the DVD encoding circuit 34 when it is not compressed, and on the other hand, when it is compressed, it is compressed and output to the DVD encoding circuit 34. To do.
The video signal V and the still image signal SP are converted into digital signals by the A / D converter 31V and then applied to the signal processing circuit 32. Signal processing circuit 32 and memory 3
3 encodes this digital still image signal in the MPEG format and outputs it to the DVD encoding circuit 34.

The DVD encoding circuit 34 includes the audio data A, the video signal V and the still image data SP, control data, karaoke video (V) data, MIDI data,
The quiz data, password, etc. are formatted into the data structure shown in FIGS. This stream data is output as it is through the output terminal OUT1 or is modulated by the modulation circuit 35 according to the medium and is output terminal OU.
It is output via T2. The stream data output via the output terminal OUT1 is, for example, the Internet,
It is transmitted via a network such as a karaoke communication line.

Next, the operation flow of the signal processing circuit 32 and the DVD encoding circuit 34 will be described with reference to the flowchart of FIG. Analog audio signal A is A /
The D converter 31 samples at a sufficiently high sampling frequency (sampling period Δt), for example, 192 kHz, and for example, a 24-bit high-resolution PCM.
Converted to a signal. In the subsequent signal processing circuit 32, when compression is not performed, the PCM data converted by the A / D converter 31 is directly used in the DVD formatting section 3
4 is applied. On the other hand, when performing compression, A
The PCM data converted by the / D converter 31 is compressed by the signal processing circuit 32 according to the encoding mode, and then applied to the DVD formatting section 34 (steps S5 and S6). In the signal processing circuit 32,
In the case of multi-channel, the channels are divided into two groups “1” and “2” and each channel is bit-shifted.

Further, the video signal V is an A / D converter 31V.
Is converted into a digital signal by the encoder, and the digital video signal is then converted into MP by an encoder in the signal processing circuit 32.
It is encoded into the EG format and applied to the DVD formatting section 34 (steps S1 and S2). The still image signal SP is also converted into a digital signal by the A / D converter 31, and then this digital still image signal SP is encoded in the MPEG format by the compression encoder in the signal processing circuit 32 and applied to the DVD formatting section 34. (Steps S3 and S4). In addition, copyright information and real-time text information (RTI), karaoke V data, MIDI data, password, etc. are transmitted via an interface (I / F) 40 (not shown) (step S
7, S8), and the character information and the disc identifier EX are applied to the DVD formatting section 34 (step S8).
9, S10).

Then, the DVD formatting section 34
It is packed in the format as described above (step S11). The data formatted by the DVD formatting unit 34 is modulated by a modulation circuit 35 by a modulation method according to the disc, and a disc is manufactured based on the modulated data, or is once recorded in a recording unit (not shown). It is transmitted via a communication I / F (not shown) (step S12).

When transmitting data via the Internet, for example, as shown in FIG. 23, the transmission data stored in the transmission buffer of the communication I / F is divided into predetermined lengths. Packetization (step S4
1) Next, a header including a destination address is added to the beginning of the packet (step S42), and then this is output and transmitted on the network (step S4).
3).

Next, the decoder (reproducing device) will be described with reference to FIG. Here, in the case of reproducing the above bonus information, the user who purchased the disc can reproduce the original music signal free of charge, but for the bonus information, the user must pay an appropriate price and enter the password. There are some usages that must be avoided. As another usage method, a usage mode in which a quiz program is recorded as a fee and the quiz program is displayed on the decoder side and the bonus information is reproduced when a correct answer is input can be considered. Also, in the case of a disc on which a program for dividing music into groups and playing each group is recorded,
Users pay for individual programs or enter passwords for free.

In FIG. 17, the signal read from the disc is first supplied through the input terminal IN1 and is demodulated by the demodulation circuit 4 according to the modulation system of the modulation circuit 35 on the encoder side.
The data is demodulated by 1 and then separated into each data by the DVD decoding circuit 42. The audio signal separated by the DVD decoding circuit 42 is processed by an audio signal processing circuit (not shown) in the signal processing circuit 43 (and the memory 44) and applied to the D / A converter 45 and LPF (low pass filter) 56. It In the D / A converter 45,
It is converted into an analog audio signal at the original sampling frequency on the encoder side and output via the analog output terminal 55. Further, in the LPF 56, this input data is limited to, for example, a quarter band (48 kHz) and is output as digital data via the output terminal 53. DVD
The video data V and the still image data SP separated by the decoding circuit 42 are output to an external display via a video processor (not shown) in the signal processing circuit 43 and a video output terminal 64, and separated by the DVD decoding circuit 42. The MIDI code is the MI code (not shown) in the signal processing circuit 43.
It is output to an external electronic musical instrument through the DI processor and the MIDI output terminal 65.

Further, the operation section 62 can specify a reproduction position for each recording surface by a group number or an interactive input signal. In this case, it is possible to output with or without band limitation. Also, select suitable audio and video from multiple scenes, stream them (highlight) and play them. Good. In FIG. 17, even if the data is transmitted via the network and supplied via the input terminal IN2, it is similarly decoded and reproduced.

When data is transmitted through the network corresponding to FIG. 23 described above, for example, as shown in FIG.
As shown in, the header is removed from the packet received from the network (step S51), the received data is restored (step S52), and then the data is transferred to the memory (step S53).

Next, the operation flow of the DVD decoding circuit 42 and the signal processing circuit 43 will be described with reference to FIG. First, the disc is accessed to read the recorded data (step S20), and then each separation step S21.
In S29, a video signal, a still image signal, an audio signal, copyright information and real-time information (RT
The character information and the disc identifier (EX) are separated from I). Next, in each of the decoding steps S22 to S30, each separated data is decoded, and then reproduced synchronously (steps S31 and S32).

There are the following three types of processing for reproducing the still image SP. 1) When the still image SP is obtained, the reproduction of the audio signal A is interrupted and muted. 2) When the still picture SP is obtained, it is reproduced together with the audio signal A based on the time control signal. 3) When the still image SP is obtained, page turning reproduction is performed based on the page turning command instructed by the user. At this time, the audio signal A is reproduced as it is.

When the still picture needs to be synchronized with the audio, the time control signal for real time synchronization is AT.
Still picture control provided in addition to SI
Time control data information (SPC under the information table SPCIT
IT-TCDI).

Still picture page control command information (SPPI) containing a page turning command is placed under SPCIT. In this way, SPCIT is general information SPCIT General Information (SPCIT-GI).
, Time control data information (SPCIT-TCDI), and still picture page control command information (SPPI).

Further, the still picture data of the SPCT pack of the real time information RTI of the still picture SP may include side information for page control of the still picture. The page control data defined by this side information is interpreted and executed with reference to SPPI.

If there is not enough capacity to store the still picture data, the RTI data of the RTI pack may include the above-mentioned side information for page control of the still picture. acceptable.

Next, referring to FIGS. 18 and 19, the control unit 6
The reproduction process of No. 3 will be described. First, during playback, a predetermined menu containing the group number is displayed, then
When the bonus program is selected, for example, when the final group number is selected by determining the group number input through the operation unit 62 in step S1, the process proceeds from step S2 to step S3. In other cases, the process proceeds from step S2 to step S9 to perform the reproduction according to the instruction. In step S3, the password shown in FIG.
Read from I, then whether password = 0000,
That is, it is determined whether or not the bonus information is stored (step S4). When the bonus information is not stored, the fact is displayed on the display unit 61 (step S5), and then the process proceeds to step S9.

On the other hand, if the bonus information is included in step S4, the input of the password is awaited (step S6). When the password is entered, it is determined whether it is correct (step S7), and if it is correct, step S8.
If not, go to step S9. In step S8, a bonus menu is displayed, and then reproduction is performed according to the instruction (step S9).

FIG. 19 shows the processing in step S9 in detail. First, the AOT in the AMGI shown in FIGS.
By referring to the T-SRPT (audio title search pointer table) (step S11), the AOTT-GRN (group number) shown in FIG. 5 is searched, and the audio title (AT
List T) with ATS (step S1)
2).

Here, the ATT-CA shown in FIGS.
Bit b3 of T (audio title category)
The group number is known from b0, and A shown in FIG.
The number of programs (= number of tracks) in the AOTT can be known by OTT-PG-Ns, and ATS can be obtained by ATSN.
The number is known, and the ATS title number is known by ATS-TTN. Therefore, the group number and the ATS number shown in FIG. 15 are known. Also, the last audio title number Imax belonging to the designated group is determined by this listing. Then the audio title number ATT
i is set to 1 (step S13).

Then, referring to ATS-PGCI (ATS program chain information) in the ATSI shown in FIGS. 8 to 14 (step S14), the AT
Search the Ti address (that is, the start and end addresses of the ATS cell) and
Is reproduced (step S15). Here, the title number shown in FIG. 15 can be known by the ATS-PG-CNT (contents) in the ATS-PGI shown in FIG.
The index shown in FIG. 15 can be known from the TS-PG entry cell number. Then the audio title number ATTi
Is incremented (step S16), and if i> Imax is not satisfied in step S17, step S16
14. On the other hand, if i> Imax, the group reproduction is terminated.

Next, referring to FIG. 25, the information recording medium is DV
A specific reproducing apparatus for a D disc will be described. This figure shows time information for synchronizing a still image with audio,
A disc 110 such as a DVD audio disc or a DVD video disc on which a page turning command is recorded
2 shows an apparatus for reproducing the signal recorded in FIG. The disk drive device 111 is a drive control circuit 1
12, the disc 110 is driven by the disc drive device 111, and the recording signal is read. The demodulation circuit / error correction circuit 113 outputs this signal to E.
After FM demodulation and error correction, the stream signal excluding the control data and DSI data is written in the track buffer 114 by the write control circuit 115, and the control data and DSI data are written in the system buffer 117 and the DSI buffer 122, respectively. Written. D
The data written in the SI buffer 122 is decoded by the DSI decoder 151 and output.

The system controller 132 controls reproduction based on the control data written in the system buffer 117. The system controller 132 has an operation unit 130 for performing reproduction control, a display unit 131, a readable / writable system parameter memory 133, a reproduction-only system parameter memory 134, and a read / write system parameter memory 134.
The writable general-purpose parameter memory 135 and the system timer 136 are connected.

The stream signal written in the track buffer 114 is read by the read control circuit 116, and then the still image pack, the RTI pack, the VBV pack, the sub-picture pack, the VBI pack, and the audio by the demultiplexer 128. Separated into packs, each pack contains a still image buffer 147 and an RT.
The data is accumulated in the I buffer 148, the VBV buffer 118, the sub picture buffer 119, the VBI buffer 120, and the audio buffer 121. The still image pack and the RTI pack are respectively the still image decoder 14
9. The RTI data decoded by the RTI decoder 150 and output, and the RTI data decoded by the RTI decoder 150 are accumulated in the buffer 150 ′.

The VBV pack is decoded by the video decoder 123 and then sent to the adder 127 via the letterbox converter 126. Further, the sub-picture pack and the VBI pack are respectively the sub-picture decoder 1
24, decoded by the VBI decoder 125 and sent to the adder 127, and these video signals are combined in the adder 127. The audio pack is sent to the audio decoder 129, in which the format decomposer 141, the channel separator 142 and the D / A converter 14 are included.
4, 145 to convert into an analog signal.

FIG. 20 shows D as another example of the information recording medium.
The format of a VD-Avd (audio + AV data) disc is shown, and this format is roughly DV.
It is composed of a D-video file and a DVD-audio file. For DVD-Video files, VT
Under SD (video title set-directory), a video manager (VMG), a video manager menu (VMGM) for video and audio, and a VM
VTS <1>, VTS managed by VMGI in G
<2> is included. Both VTS <1> and VTS <2> include video data and audio data. The structure of this VTS is up to the disc creator.

On the other hand, the DVD-audio file has the same structure as that shown in FIG. 1, but in this example, ATS <1.
>, ATS <m> audio data is VT
It is paired with audio data in VTS <1> and VTS <2> on the S side, and is managed by AMGI in AMG. In addition, other audio data such as ATS <2> does not form a pair with the VTS side, and the same AMG in the AMG.
Managed by I. Although the above embodiments have been described by taking the case of a digital disc as an example, the present invention is not limited to this and the present invention can be applied to a recording medium such as a memory card.
FIG. 26 shows still another example of the information recording medium. In particular, in this example, VTS <1> includes a non-bonus song,
It indicates that VTS <2> includes a bonus song, ATS <1> to ATS <k> include a non-bonus song, and ATS <k + 1> to ATS <m> include a bonus song. There is.

In the above embodiment, the case where the decoding process and the like are performed by hardware has been described.
It can also be realized by an application (software) on a PC. In this case, set the decoding program to C
It may be recorded in a recording medium such as a D-ROM and distributed to users, or may be distributed to user personal computers via a network. In addition, when the content information is transmitted not only through a disc medium such as a DVD but also through a communication line such as the Internet or a karaoke communication line, and the decoding side is decoded by hardware or an application on a PC. Can also be applied.

According to the present invention, the following inventions are provided in addition to the inventions described in the claims. (1) A recorded medium in which an encoding computer program corresponding to claim 1 is recorded. (2) A transmission method for transmitting a data structure corresponding to "claim 1". (3) A transmission method for transmitting an encoding computer program corresponding to "claim 1".

[0060]

As described above, according to the present invention, the data indicating whether or not the bonus music is included is included, and the unit of the data including the music is one audio title. Since the unit for accessing the audio title and playing the music is one group, and the audio titles including the bonus music are arranged in one group, it is possible to record the original music and the bonus music, or to record one or more of the original music. Even if the songs are grouped and recorded on the disc, the original song can be played back at the same high speed as a normal disc. Further, since the bonus music pieces are arranged in the final group, it is possible to prevent the management from becoming complicated.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a format of a DVD-audio disc as a first embodiment of an information recording medium to which the present invention is applied.

FIG. 2 is an explanatory diagram showing in detail the formats of AMGI (audio manager information) and AOTT-SRPT (audio only title search pointer table) of FIG.

FIG. 3 is an explanatory diagram showing in detail the format of AOTT-SRPTI (Audio Only Title Search Pointer Table Information) of FIG.

FIG. 4 is an explanatory diagram showing in detail the format of AOTT-SRP (Audio Only Title Search Pointer) in FIG.

5 is an explanatory diagram showing in detail the format of ATT-CAT (audio title category) of FIG. 4. FIG.

FIG. 6 is an explanatory diagram showing in detail the formats of ATS (audio title set) and ATSI (audio title set information) of FIG. 1;

7 is an explanatory diagram showing in detail the format of AOTT-AOBS (audio object set for audio-only title) of FIG. 6;

8 is an explanatory diagram showing in detail the format of ATS-PGCIT (ATS program chain information table) of FIG.

FIG. 9 is a diagram showing the ATS-PGCI (ATS program
It is explanatory drawing which shows the format of (chain information) in detail.

FIG. 10 is ATS-PGC-GI (ATS-PG of FIG. 9;
It is explanatory drawing which shows the format of C general information in detail.

11 is an explanatory diagram showing the format of ATS-PGIT (ATS program information table) in FIG. 9 in detail.

12 is an explanatory diagram showing the format of ATS-PGI (ATS program information) in FIG. 11 in detail.

FIG. 13 shows an ATS-C-PBIT (ATS cell
It is explanatory drawing which shows in detail the format of a playback information table.

14 is an ATS-C-PBI (ATS cell
It is explanatory drawing which shows the format of playback information) in detail.

FIG. 15 is an explanatory diagram showing a data structure of a music piece viewed from the reproducing side.

FIG. 16 is a block diagram showing an encoding device applied to the present invention.

FIG. 17 is a block diagram showing a reproducing apparatus applied to the present invention.

FIG. 18 is a flowchart for explaining a reproduction process.

19 is a flow chart for explaining the group reproduction process of FIG. 18 in detail.

FIG. 20 is an explanatory diagram showing a format of a DVD-Avd disc as a second embodiment of an information recording medium to which the present invention is applied.

FIG. 21 is a signal processing circuit 32 and a DVD encoding circuit 34.
FIG. 6 is an operation flow chart of

FIG. 22 is an operation flow diagram of the DVD decoding circuit 42 and the signal processing circuit 43.

FIG. 23 is a flowchart showing a processing procedure when transmitting data.

FIG. 24 is a flowchart showing a processing procedure when receiving data.

FIG. 25 is a schematic block diagram of a specific playback device when the information recording medium is a DVD disc.

FIG. 26 is a diagram showing another example of the information recording medium.

[Explanation of symbols]

32 signal processing circuit 34 DVD encoding circuit 35 Modulation circuit 61 Display 62 Operation unit (input means) 63 control unit (reproducing means)

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5D044 AB05 AB08 BC02 CC04 DE03                       DE14 DE49 DE53 FG18 GK08                       GK12                 5D110 AA14 AA27 AA29 DA04 DA06                       DA12 DB05 DC05 DE01

Claims (3)

[Claims] 1. A step of A / D converting an analog audio signal of an original music piece to generate a digital data string, and a unit of data including a music piece is set as one audio title in a recording area of a disc, and a plurality of reproducing apparatuses are provided. The first audio title that is provided in the first to the (n-1) th units and that includes the original music piece, with the unit for accessing the audio title of No. 1 as the unit for continuously reproducing the music piece being one title group, One or more first title groups composed of a first audio title including a plurality of audio objects (AOB), and a second audio title including a bonus information, which is provided at the last n-th position when desired and which includes bonus information. , A second audio title containing multiple audio objects (AOB) 1 Two second title groups, and interactive data as data for accessing the second title group of the bonus information and as data for indicating that the second title group of the bonus information does not exist. A first pointer constituted by only a first pack having a search pointer for a playback apparatus to search for the audio title and a still picture set (SPS), and the AOB having audio data as actual data. AOB, a second pack including a first pack and a second pack having real-time information data relating to the audio data as actual data, and the SPS relates to the audio data. Still picture data And a third pack including the audio title set information (ATSI) including control information (ATS-PGCIT) for reproducing the plurality of AOBs in the reproduction order, and the ATSI includes the SPS. And encoding the still picture data in the page into control data (SPCIT), which is formatted into a data structure and recorded. 2. The first title group including the original music piece and the second title group including bonus information are composed of an AOTT audio title and an AVTT audio title.
Encoding method described. 3. A reproducing apparatus for a signal recorded by the encoding method according to claim 1, wherein the input means inputs interactive data for accessing the bonus information, and the input interactive data is related to the input means. Without access to the first title group based on the search pointer to unconditionally reproduce the audio data of the original song, and when the input interactive data and the recorded interactive data match, the search pointer is changed to the search pointer. Reproducing means for accessing the second title group based on the reproduction of the bonus information; first decoding means for decoding control information (SPCIT) for page control of still picture data from the recorded ATSI; Recorded Stilpi Second decoding means for decoding the still picture data from the third pack arranged in the charset (SPS), and the second decoding means based on at least the SPCIT extracted from the first decoding means during the reproduction. A reproducing apparatus having output means for controlling and outputting the still picture data taken out by the decoding means.