JP3199258B2 - Encoding method, playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an encoding method and a reproducing apparatus for recording original music and bonus music on an information recording medium.

[0002]

2. Description of the Related Art DVD (Digital Video Disk,
Digital versatile discs have a larger capacity than CDs (compact discs), and thus have attracted attention as audio discs for music and the like. However, DVDs are capable of higher density recording than CDs and have more recording time, so how to use them as music recording media has been an issue. For example, besides the original music as a music source, its karaoke and B
If it can be selectively reproduced as GM, the user will have more ways to enjoy it. It is also desired to use a method in which the user enjoys playing more times as the user performs the reproducing operation many times.

Therefore, the present inventor has filed a prior application (Japanese Patent Application No. 9-90).
No. 176517), one or more songs and bonuses to the songs so that the disc maker can use the discs in a wide variety of ways and allow the user to perform a wide variety of playbacks. Information and interactive data (password) for accessing the bonus information are recorded on a DVD audio disc, and a method of permitting reproduction of the bonus information when a correct password is input on the reproducing side is proposed.

[0004] According to this method, for example, an original song and karaoke,
Data such as BGM, MIDI, and practice sound at the time of recording are recorded, and the original music is permitted to be reproduced free of charge. However, as for the bonus information, a password entered by the user on condition that payment is paid is input as interactive data. In such a case, a usage form that permits reproduction is conceivable. Also, the original music is allowed to be played unconditionally, but the bonus information is presented to the user by giving a quiz to the user via the video means, and is played when the user inputs the correct answer as interactive data. Usage forms are conceivable.

Further, the inventor of the present application has filed a DVD audio disc with a program for grouping one or more music pieces and reproducing the music for each group, and interactive data (password) for accessing the music pieces for each group. And a method of permitting reproduction of music of a group whose input interactive data and transmitted password match 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 an original music group is grouped into each music such as karaoke, BGM, and MIDI. And record. Then, when the user inputs a group number obtained for free as a password or a password for each group obtained on condition that payment is made, the reproduction of the group is permitted.

[0007]

Problems to be solved by the invention (1) However,
As described above, if the disc maker can use the disc in a variety of different ways, and if the user can perform a variety of different playbacks, the disc creator can record the bonus music on any disc. It is not easy to manage whether or not the bonus music has been recorded, and it is not easy for the user to know on which disc the bonus music is recorded or not recorded. Occurs (first problem).

(2) When the original music and the bonus music are mixedly recorded on the disk, or when one or more musics including the original music are grouped and recorded on the disk, the reproduction apparatus On the other hand, there is a problem that the original music cannot be reproduced at the same high speed as a normal disc when reproducing the original music (second problem).

The present invention has been made in consideration of the above first problem, and has been made in consideration of the case where a disc creator can use a disc in a variety of methods and a user can perform a variety of reproductions. It is possible for a disc creator to easily manage which disc has a bonus song recorded or not recorded thereon, and it is easy for a user to determine which disc has a bonus song recorded or not recorded. It is a first object of the present invention to provide a method for encoding information on an information recording medium which can be known to the public, and a reproducing apparatus therefor.

In view of the second problem, the present invention also provides an encoding method for recording an original song and a bonus song, or for grouping one or more songs including the original song and recording them on a disc. It is a second object of the present invention to provide a reproducing apparatus capable of reproducing the recorded original music at the same high speed as a normal disc.

[0011]

The present invention comprises the following means 1) and 2). 1) A / D conversion of an analog audio signal of an original music and a bonus music to generate a digital data sequence; and audio data in which a recording area for an auxiliary signal and a recording area for a main signal are continuously arranged. In the recording area of the main signal of the recording medium, the first to the first music pieces, each of
The first interactive data for identifying the (n-1) th group and the final nth group composed of the bonus music provided when desired, respectively, and the components of the original music. A certain first
Audio title, a second audio title that is a component of the bonus song if the bonus song is provided, and data to be compared with data supplied by the user during reproduction to access the bonus song. a is, if the same as the supplied data,
Allow playing the group of bonus songs
Together with the bonus song group does not exist
A second interactive data used as data indicative thereof, and reproduction control information (AMG) including said first and second interactive data, provided when desired
A video file, and the audio data in it is
A first audio component of the original song
As a title, and as a component of the bonus song
It is allowed to manage as a certain second audio title.
At least recording a video file to be stored . 2) An apparatus for reproducing an audio data recording medium recorded by the encoding method according to claim 1, wherein: means for designating a reproduction position by a title group; An audio data recording medium reproducing apparatus, comprising: means for extracting the audio title with reference to data; and means for decoding audio data in the extracted audio title.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing the format of a DVD-Audio disc as a first embodiment of an information recording medium to which the present invention is applied.

As a first embodiment of the information recording medium to which the present invention is applied, in the format of a DVD-audio disc shown in FIG. 1, a SAMG (Structure Format) is placed under ATS-D (Audio Title Set-Directory). Of Simple Audio Manager / Stru
a simple audio manager), an AMG (audio manager), an SPS (still picture set), and a plurality (m) of ATS <1> to ATS <m> managed by AMGI in the AMG. Provided.
SAMG is an area in which a SAPP table (TOC) for locating 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), an AMG menu (AMGM) and a backup AMGI (AMGI-BUP). The AMGI (and AMGI-BUP) includes an 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. For example, if the password is 0000, it indicates that no bonus information is provided, and the password is 000.
If it is not 0, it indicates that bonus information is provided and indicates an actual password. SPS (Still /
Picture set) includes still image data.

ATS <1> to ATS <m> include audio data of normal music (hereinafter, non-bonus music), karaoke music and BGM audio data as bonus music, and karaoke music other than audio data. Includes super captions, MIDI codes, and quiz data. The structure of this ATS is up to the disc creator,
The above-mentioned non-bonus music and bonus music are arranged in an arbitrary ATS.

As shown in detail in FIG. 2, the AMGI includes: an audio manager information management table (AMGI-MAT); an audio title search pointer table (ATT-SRPT); Only title search pointer
Audio manager data table (AMGM-PGCI-UT); audio text data manager (ATX)
TDT-MG).

AOTT-SRPT is composed of an audio-only title search pointer,
Table information (AOTT-SRPT
I) and a plurality of audio-only title search pointers (AOTT-SRPs). AOTT-
The SRPTI is composed of 4 bytes as shown in detail in FIG. 3. 2 bytes of audio-only title search
The number of pointers (AOTT-SRP-Ns), 2 bytes of 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 comprises: 1-byte audio title category (ATT)
-CAT) and the number of 1-byte programs in AOTT (AOTT-
PG-Ns), 4 bytes of AOTT total playback time (AOTT-PB-TM), 1 byte of ATS number (ATSN), and 1 byte of ATS title number (ATS- TT
N), and a 4-byte ATS start address (ATS-S
A)

Audio title category (ATT
As shown in detail in FIG. 5, the AOTT presence / absence area of 1 bit (b7), the reserved area of 3 bits (b6 to b4), and the AOTT of 4 bits (b3 to b0) A belongs
OTT group number (AOTT-GRN). However, AOTT presence bit b7 = 0b: No AOTT = 1b: AOTT exists

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 (sec) per bit.

ATS <1> to ATS <m> shown in FIG.
As shown in detail in FIG. 6, each of the following is sequentially from the beginning: ATSI (ATS information); audio-only title audio object shown in detail in FIG. 7; set (AOTT-AOBS); ATSI. A
ATSI-MAT (ATSI management table) and ATS-PGCIT (AT) shown in detail in FIGS.
S program chain information table).

As shown in detail in FIG. 7, the AOTT-AOBS is constituted by a plurality of audio-only title audio objects (AOTT-AOB). Each of the AOTT-AOBs is constituted by a plurality of programs (PG), and each of the programs is constituted by a plurality of cells (ATS-C). AOTT-A
The OB includes two types, one containing only audio data as shown in detail in FIG. 7A, and one containing audio data and real time information data (RTI data) as shown in detail in FIG. AO
It is composed of TT-AOB. Then, one or more types of AOTT-AOB are arranged in one disc or one song.

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

ATS-PGCIT (ATS) shown in FIG.
As shown in detail in FIG. 8, the program chain information table includes: an audio title set PGCI table information (ATS-PGCITI); and n audio title set PGCI search pointers (ATS-PGCI table). 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 top as shown in FIG. 9, an ATS-PGC general information (ATS-PGC-GI) shown in detail in FIG. 10, and a detail shown in FIGS. It comprises 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 from the top in order: 4 bytes (RBP0 to 3) of ATS-PGC content (ATS-PGC-CNT) ATS-PGC playback time (ATS-PGC-PB-TM) of 4 bytes (RBP4-7); reserved area of 2 bytes (RBP8, 9); and 2 bytes (RBP10, 11). ATS-PGIT start address, ATS-C-PBI of 2 bytes (RBP12, 13)
T start address, and 2 bytes (RBP14, 15) reserved area.

The ATS program information table (ATS-PGIT) shown in FIG.
As shown in detail in FIG. 2, the information is composed of n ATS program information (ATS-PGI) # 1 to #n. Each of the ATS-PGIs # 1 to #n
As shown in detail in (2), it is composed of 20 bytes (RBP0 to 19) in order from the beginning. ATS-PG content (ATS-PG-CNT) of 4 bytes (RBP0 to 3); ATS- of 1 byte (RBP4) A 1 byte (RBP5) reserved area; a 4 byte (RBP6 to 9) start presentation time (FAC-S-PTM) of the first audio cell of the ATS-PG; ATS-PG playback time of 4 bytes (RBP10 to 13), ATS-PG pause time of 4 bytes (RBP14 to 17), and reserved area (copyright management data) of 1 byte (RBP18) CMI) and a 1-byte (RBP19) reserved area.

The ATS cell playback shown in FIG.
Information table (ATS-C-PBI
T), as shown in detail in FIG.
Playback information (ATS-C-PB
I) It is composed of # 1 to #n. ATS-CP
Each of BIs # 1 to #n includes one as shown in FIG.
It is composed of 2 bytes (RBP0 to 11) and sequentially from the beginning: 1-byte (RBP0) ATS-C index number; 1-byte (RBP1) ATS-C type (ATS-C)
2 bytes (RBP2, 3) reserved area; 4 bytes (RBP4-7) ATS-C start address; 4 bytes (RBP8-11) ATS-C end Address.

FIG. 15 shows that the player (playback device)
A data structure when audio data is reproduced based on reproduction control information in the MGI and the ATSI is shown. First, one album indicates audio data of the entire surface of the disc, and in the case of a single-sided disc, the entire album is one side, and in the case of a double-sided disc, the entire album is one side. 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 one
Are composed of up to nine groups # 1 to #n (hereinafter, title groups).
It is composed of nine 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 performs continuous reproduction.

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

FIG. 16 shows an encoding device according to the present invention. An audio signal A such as original music, karaoke music, and BGM is converted into a digital signal by an A / D converter 31 and then applied to a signal processing circuit 32. The signal processing circuit 32 and the memory 33 convert this digital audio signal into a DV signal without performing compression.
The data is output to the D encoding circuit 34. On the other hand, when compression is performed, the data is compressed and output to the DVD encoding circuit 34. Also,
The video signal V and the still image signal SP are supplied to the A / D converter 31V
Into a digital signal, and then the signal processing circuit 3
2 is applied. The signal processing circuit 32 and the memory 33 encode this digital still image signal into an MPEG format and output 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, the password and the like are formatted into the data structure shown in FIGS. This stream data is output as it is via the output terminal OUT1, or is modulated by the modulation circuit 35 in accordance with the medium, and the output terminal OU
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 / D
The converter 31 samples at a sufficiently high sampling frequency (sampling period Δt), for example, 192 kHz, and converts it into a 24-bit high-resolution PCM 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 applied to the DVD formatter. On the other hand, when performing compression, A / D
The PCM data converted by the converter 31 is compressed by the signal processing circuit 32 according to the encoding mode,
Next, it is applied to the DVD formatting section 34 (steps S5 and S6). In the signal processing circuit 32, in the case of multi-channel, each channel is bit-shifted in two groups “1” and “2”.

The video signal V is supplied to the A / D converter 31V
The digital video signal is then converted to a digital signal by an encoder in the signal processing circuit 32.
The data is encoded in the EG format and applied to the DVD formatting unit 34 (steps S1 and S2). The still picture signal SP is also converted into a digital signal by the A / D converter 31, and then the digital still picture signal SP is encoded into an MPEG format by a compression encoder in the signal processing circuit 32 and applied to the DVD formatting section 34. (Steps S3 and S4). Also, the copyright information, 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 unit 34 (step S8).
9, S10).

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

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

Next, a decoder (reproducing apparatus) will be described with reference to FIG. Here, when reproducing the bonus information as described above, the user who purchased the disc can play the original music signal free of charge, but must pay an appropriate price for the bonus information and enter a password. There are usages that must be made. As another use method, a quiz program may be recorded with the charge being free, displayed on the decoder side, and the bonus information may be reproduced when a correct answer is input. In addition, in the case of a disc in which a program for dividing music into groups and reproducing the music for each group is recorded,
The user pays for the individual program or enters the password for free.

In FIG. 17, a signal read from a disk is first supplied via an input terminal IN1, and is demodulated by a demodulation circuit 4 according to the modulation method of a modulation circuit 35 on the encoder side.
1 and then separated by the DVD decoding circuit 42 into respective data. 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 the LPF (low-pass filter) 56. You. In the D / A converter 45,
The signal is converted into an analog audio signal at the original sampling frequency on the encoder side and output via an analog output terminal 55. In the LPF 56, the input data is limited to, for example, a 1/4 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 stored in a not-shown MIDI
It is output to an external electronic musical instrument via a DI processor and a MIDI output terminal 65.

The operation unit 62 can specify a reproduction position by a group number or an interactive input signal for each recording surface. In this case, it is possible to perform band limitation or output without performing band limitation, and to select a suitable audio or video from a plurality of scenes and make it streamed (highlighted) for playback. Is also 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 via the network corresponding to FIG. 23, for example, FIG.
As shown in (1), 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, referring to FIG.
2 and the operation flow of the signal processing circuit 43 will be described.
First, the disk is accessed to read the recorded data (step S20), and then each of the separation steps S21 to S21 is performed.
29, a video signal, a still image signal, an audio signal, copyright information and real-time information (RTI)
, Character information and a disc identifier (EX) are separated. Next, each of the separated data is decoded in each of the decoding steps S22 to S30, and is then synchronously reproduced (steps S31 and S32).

Here, there are the following three types of processing for reproducing the still picture 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, the still picture SP is reproduced together with the audio signal A based on the time control signal. 3) When the still image SP is obtained, the page is played back based on the page turning command instructed by the user. At this time, the audio signal A is reproduced as it is.

When it is necessary to synchronize a still image with 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).

Further, still picture page control command information (SPPI) containing a page turning command is placed below SPCIT. As described above, SPCIT is SPCIT general information (SPCIT-GI) of general information.
, Time control data information (SPCIT-TCDI), and still picture page control command information (SPPI).

Here, the still picture data of the SPCT pack of the real-time information RTI of the still picture SP may include side information for controlling the page of the still picture. The page control data specified by the side information is interpreted while referring to the SPPI.

If there is not enough space to store the still picture data, the RTI data of the RTI pack may include side information for controlling the still picture page. acceptable.

Next, referring to FIG. 18 and FIG.
The reproduction process 3 will be described. First, upon playback, a predetermined menu including a group number is displayed.
In step S1, the group number input via the operation unit 62 is determined, and when the bonus program is selected, such as when the last group number is selected, the process proceeds from step S2 to step S3. In other cases, the process proceeds from step S2 to step S9 to perform reproduction according to the instruction. In step S3, the password shown in FIG.
I, then read if password = 0000,
That is, it is determined whether bonus information is stored (step S4). If no bonus information is stored, the fact is displayed on the display unit 61 (step S5), and the process proceeds to step S9.

On the other hand, if the bonus information is included in step S4, input of a password is waited for (step S6). When the password is entered, it is determined whether or not the password is correct (step S7).
If not, the process proceeds 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 of step S9 in detail. First, the AOT in the AMGI shown in FIGS.
With reference 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
T) together with the ATS (step S1)
2).

Here, the ATT-CA shown in FIGS.
Bit b3 of T (audio title category)
The group number can be found from b0, and A0 shown in FIG.
The number of programs (= the number of tracks) in the AOTT is known by OTT-PG-Ns, and the ATS is ATS 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. The list determines the last audio title number Imax belonging to the specified group. Next, the audio title number ATT
i = 1 is set (step S13).

Next, with reference to the ATS-PGCI (ATS program chain information) in the ATSI shown in FIGS. 8 to 14 (step S14), the AT
A search for the address of Ti (ie, the start address and end address of the ATS cell)
Is reproduced (step S15). Here, the title number shown in FIG. 15 can be obtained from the ATS-PG-CNT (content) in the ATS-PGI shown in FIG.
The index shown in FIG. 15 can be determined from the TS-PG entry cell number. Next, the audio title number ATTi
Is incremented (step S16), and if i> Imax is not satisfied in step S17, step S16 is executed.
Returning to 14, on the other hand, if i> Imax, the group reproduction ends.

Next, referring to FIG.
A specific reproducing apparatus in the case of a D disk will be described. The figure shows time information for synchronizing a still image with audio,
Disc 110 such as a DVD audio disc or a DVD video disc on which a page turning command is recorded
1 shows an apparatus for reproducing a signal recorded in a. The disk drive device 111 has a drive control circuit 1
12, the disk 110 is driven by the disk drive device 111 and the recording signal is read. This signal is demodulated by demodulator / error corrector 113 to E
After FM demodulation and error correction, the stream signal excluding the control data and the DSI data is written to the track buffer 114 by the write control circuit 115, and the control data and the DSI data are stored 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 the reproduction based on the control data written in the system buffer 117. The system controller 132 includes an operation unit 130, a display unit 131, a readable / writable system parameter memory 133, a reproduction-only system parameter memory 134, and a read / write
A writable general-purpose parameter memory 135 and a 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 are packed by the demultiplexer 128. Each of the packs is separated into a still image buffer 147 and an RT.
The I buffer 148, the VBV buffer 118, the sub picture buffer 119, the VBI buffer 120, and the audio buffer 121 are stored. Each of the still image pack and the RTI pack is a still image decoder 14.
9. The RTI decoder 150 decodes and outputs the RTI data, and the RTI data decoded by the RTI decoder 150 is stored 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. The sub-picture pack and the VBI pack correspond to the sub-picture decoder 1 respectively.
24, decoded by the VBI decoder 125 and sent to the adder 127, where the video signals are synthesized. 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
4 and 145, the signal is converted into an analog signal.

FIG. 20 shows another example of the information recording medium,
Indicates the format of a VD-Avd (audio + AV data) disc.
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 and audio video manager menu (VMGM), and a VM
VTS <1>, VTS managed by VMGI in G
<2> is included. VTS <1> and VTS <2> both include video data and audio data. The configuration of this VTS is free to the disc creator.

On the other hand, the DVD-audio file has the same configuration as that shown in FIG. 1, but in this example, ATS <1
>, ATS <m> are VT
It forms a pair with the audio data in the VTS <1> and VTS <2> on the S side, and is managed by the AMGI in the AMG. Also, other audio data such as ATS <2> does not form a pair with the VTS side,
I. Each of the above embodiments has been described by taking the case of a digital disk as an example, but the present invention is not limited to this and 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,
VTS <2> indicates that a bonus song is included, ATS <1> to ATS <k> include non-bonus songs, and ATS <k + 1> to ATS <m> indicate a bonus song. I have.

Although the above embodiment has been described with reference to the case where decoding processing and the like are performed by hardware,
It can also be realized by an application (software) on a PC. In this case, the decoding program is C
It may be recorded on a recording medium such as a D-ROM and distributed to users, or distributed to user personal computers via a network. In addition to transmitting the content information not only via a disk medium such as a DVD, but also via a communication line such as the Internet or a karaoke communication line, and decoding on the playback side 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 on which an encoded 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 encoded computer program according to claim 1.

[0060]

As described above, according to the present invention, an audio data recording medium in which a recording area for an auxiliary signal and a recording area for a main signal are continuously arranged, wherein the recording area for the main signal is A data structure including one or more music pieces, playback control information for reading and playing the music pieces in groups, and interactive data for accessing the music pieces for each group is recorded. Even if the original song and bonus song are recorded, or one or more songs including the original song are grouped and recorded on the disc, the original song is played at the same high speed as a normal disc Can be.
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 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.

FIG. 2 is an explanatory diagram showing the formats of AMGI (Audio Manager Information) and AOTT-SRPT (Audio Only Title Search Pointer Table) in FIG. 1 in detail.

FIG. 3 is an explanatory diagram showing in detail a format of AOTT-SRPTI (Audio Only Title Search Pointer Table Information) of FIG. 2;

FIG. 4 is an explanatory diagram showing the format of AOTT-SRP (Audio Only Title Search Pointer) of FIG. 2 in detail.

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

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

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

FIG. 8 is an explanatory diagram showing the format of ATS-PGCIT (ATS program chain information table) of FIG. 6 in detail.

FIG. 9 shows the ATS-PGCI of FIG.
It is an explanatory view showing the format of (chain information) in detail.

FIG. 10 shows ATS-PGC-GI (ATS-PG
It is an explanatory view showing the format of (C general information) in detail.

FIG. 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 the ATS-C-PBIT of FIG.
FIG. 3 is an explanatory diagram showing a format of a playback information table in detail.

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

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

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

FIG. 17 is a block diagram showing a playback device according to the present invention.

FIG. 18 is a flowchart illustrating a reproduction process.

FIG. 19 is a flowchart for explaining the group reproduction processing of FIG. 18 in detail;

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

FIG. 21 shows a signal processing circuit 32 and a DVD encoding circuit 34;
FIG. 5 is an operation flow chart of FIG.

FIG. 22 is an operation flowchart 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 data is received.

FIG. 25 is a schematic block diagram of a specific reproducing apparatus when the information recording medium is a DVD disk.

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

[Explanation of symbols]

 Reference Signs List 32 signal processing circuit 34 DVD encoding circuit 35 modulation circuit 61 display unit 62 operation unit (input means) 63 control unit (reproduction means)

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Claims (2)

(57) [Claims] 1. A step of A / D converting an analog audio signal of an original music and a bonus music to generate a digital data sequence, and an audio in which a recording area for an auxiliary signal and a recording area for a main signal are continuously arranged. In the recording area of the main signal of the data recording medium, first to (n−1) th groups composed of the original music and a final nth group composed of the bonus music provided when desired. First interactive data to be respectively identified, a first audio title that is a component of the original song, and a second audio that is a component of the bonus song when the bonus song is provided. The data to be compared with the title and the data supplied by the user to access the bonus music during reproduction. Te, the bonus music with the case the same as the supplied data, allows to reproduce a group of the bonus songs
If there is no song group, use this data
A second interactive data use this in, and the first and second reproduction control information including interactive data (AMG), a video file that is provided when desired, therein
Audio data is a component of the original music.
As the first audio title,
As the second audio title that is a component of the music
Recording at least a video file that is allowed to be managed by the encoding method. 2. A reproducing apparatus for an audio data recording medium recorded by the encoding method according to claim 1, wherein: a means for designating a reproduction position by a title group; An audio data recording medium reproducing apparatus, comprising: means for extracting the audio title with reference to the first interactive data; and means for decoding audio data in the extracted audio title.