JP2003151246A - Disk playback method and recording and reproduction method of audio signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently record, reproduce and display character information indicating a content when mainly recording audio data such as a music source. SOLUTION: The audio data are arranged in and an A pack and the character information and display time data on the audio data are arrange in a D pack. The display time data in the D pack are separated into display start time data and display end time data by a display time decoder 51, and applied to a start comparator 52 and an end comparator 53. Character data are converted into dot matrix character data for display by a character data decoder 54, and stored into a buffer 55. The start comparator 52 and the end comparator 53 compare the data on the display start time and the display end time with an A pack address, and control the display time of the character.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk reproducing method and an audio signal recording / reproducing method for displaying the recorded information from a disk on which character information indicating a music title of an audio signal and the like are recorded.

[0002]

2. Description of the Related Art Conventionally, a CD (Compact Disc) has been known as a medium for recording character information such as a music title of an audio signal of a music source and other control information.
In the conventional CD, when recording character information, P, Q,
Among the 8-bit subcodes of R, W, S, T, U, V, and W, recording is performed using a 6-bit channel from R to W.

[0003]

However, in the CD, character information indicating the contents of the music source and other information are scattered and recorded on the disc, so that, for example, the music source being played is tracked instantaneously. However, there is a problem in that it is difficult to display the character (V) on the music source (A) being reproduced effectively in the AV mode.

By the way, in a DVD (digital versatile disc) -video disc, when a subtitle superimposition of a moving image such as a movie is recorded, it is arranged and recorded continuously. However, considering a DVD audio disc that mainly records audio data such as a music source on a DVD, this method has a problem that the allocation of audio data is reduced.

In view of the above problems, the present invention provides a disc reproducing method and an audio signal which can display the recorded information from a disc on which audio data such as a music source and character information indicating the contents thereof are recorded. It is an object to provide a recording / reproducing method.

[0006]

In order to solve the above-mentioned problems, the present invention comprises means described in 1) to 4) below. That is, 1) a disc in which a recording area for an auxiliary signal and a recording area for a main signal are continuously arranged, and a first pack including audio data in the recording area for the main signal, and the first pack
Character data to be reproduced together with the audio data in the pack, display time control data for controlling the display time thereof, and a second pack including a plurality of language codes of the characters, the contents of which are character information related data. Has a data structure in which a second pack having a flag (RTI_INFO flag) for identifying that is and an AMGI management area including information for controlling reproduction of the first pack are arranged,
An audio title set (ATS) including the first pack and the second pack is recorded, and a disc in which a video pack including video data and data for controlling the video data are not recorded is reproduced. A method for reproducing a disc, comprising: reproducing at least a first pack and a second pack from the disc; and a first decoding for decoding character information regarding audio data from the first pack reproduced by the reproducing step. Step, a second decoding step of decoding the display time control data and a language code indicating the type of the language from the second pack reproduced in the reproducing step, and a second decoding step of the first decoding step. The decoded character information is decoded by the second decoding step. And displaying the desired language on the basis of the display time control data and the language code,
And a third decoding step of decoding the audio data from the first pack reproduced by the reproducing step. 2) The disc reproducing method according to claim 1, wherein the maximum number of the language codes is eight. 3) A disc in which a recording area of an auxiliary signal and a recording area of a main signal are continuously arranged, and a first pack containing audio data in the recording area of the main signal and the first pack.
A second pack including character information to be reproduced together with the audio data in the pack, display time control data for controlling the display time thereof, and a plurality of language codes indicating the kind of the language, and the contents of the second character. It has a data structure in which a second pack having a flag (RTI_INFO flag) for identifying information related data and an AMGI management area containing information for controlling reproduction of the first pack are arranged. And an audio title set (ATS) including the second pack and a video pack including video data and data for controlling the video data are not recorded. Recorded on the disc, and the character information is reproduced together with audio data from the recorded disc. Method of recording and reproducing I o signal. 4) The audio signal recording / reproducing method according to claim 3, wherein the maximum number of the language codes is eight.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. 1 is a block diagram showing an embodiment of an audio signal encoding apparatus applied to the present invention, and FIG. 2 is a block diagram showing in detail the signal processing circuit of FIG. In each embodiment, the DVD video standard will be described as an example of the predetermined standard.

In FIG. 1, an analog audio signal A
Is sampled at a sufficiently high sampling frequency (sampling period Δt), for example, 192 kHz by the A / D converter 31, and is, for example, a 24-bit high-resolution PC.
Data strings converted into M signals and corresponding to the high resolution curve α xb1, x1, xa1, x2, xb2, x3, xa2, ...
xbi, x2i-1, xai, x2i, ... This data string (xbi, x2i-1, xai, x
2i) is a signal processing circuit 32 and a memory 3 shown in detail in FIG.
3 and then applied to the DVD formatting section 34.

The configuration of the signal processing circuit 32 will be described in detail with reference to FIG. First, a data string (xbi, x2i-1, xa corresponding to the high-resolution curve α is formed by a low-pass filter 36, for example, an FIR filter, which passes a 1/2 band.
i, x2i), the data string xc1, *, *, *, xc2, *, *, *, xc3, *, *, corresponding to the band-limited low-resolution curve β
*, ..., Xci, *, *, *, ... are obtained, and then data “*” in this data string is thinned out by the thinning circuit 37, so that the data strings xc1, xc2, xc3 ,. ., Xci, ... Is generated. Here, the data string xci is a data string in which the sampling frequency is reduced to 1/4 by band limiting the digital data A / D converted by the A / D converter 31.

Further, the data string (xbi, x2i-1, xai, x
2i), the data xi is thinned by the thinning circuit 38 to generate the data strings xb1, xa1, xb2, xa2, ..., Xbi, xai ,.

Then, these data strings xci, xbi, x
Based on ai, a difference xbi-xci = [Delta] 1i xai-xci = [Delta] 2i is calculated by the adder 39 acting as a difference calculator. Here, the difference data Δ1i and Δ2i are, for example, 2
It is 4 bits or less, and the number of bits may be fixed or variable.

The allocation circuit 40 packs the data string xci and the difference data Δ1i and Δ2i into user data (see FIG. 4) (1 packet = 2034 bytes) and outputs the user data to the DVD formatting section 34.
In the case of 16 bits, the data string with the high resolution sampling frequency is packed in the user data,
The user data may be output to the DVD formatting unit 34.

The video signal V is an A / D converter 31V.
Is converted into a digital signal by the V encoder 32V, and the digital video signal is encoded in the MPEG format by the V encoder 32V, then packed into user data shown in FIG. 4 and applied to the DVD formatting section 34. The DVD formatting unit 34 is shown in FIG.
It is packed in a format as shown in FIG. The data formatted by the DVD formatting unit 34 is modulated by the modulation circuit 35 by a modulation method suitable for the disc, and the disc is manufactured based on the modulated data.

FIG. 3 is an explanatory diagram showing a format of a disc applied to the present invention, FIG. 4 is an explanatory diagram showing in detail the formats of the audio pack and the video pack of FIG. 3, and FIG. 5 is a control (CONT) pack of FIG. 6 in detail, FIG. 6 is an explanatory view showing PCI data in FIG. 5 in detail, and FIG. 7 is data search information (D
SI) in detail, FIG. 8 is an illustration showing the format of the real-time information data (D) pack in FIG. 3 in detail, and FIG. 9 is an illustration showing the format of the audio character display (ACD) area in FIG. 8 in detail.
10 is an explanatory diagram showing an example displayed by the namespace information of FIG. 9, and FIG. 11 is an explanatory diagram showing another format of the real-time information data (D) pack of FIG. 3 in detail. 21 is a diagram for explaining the data structure of the DVD-Avd disc according to the present invention, FIG. 22 is a diagram for explaining the data structure of the DVD audio disc according to the present invention,
FIG. 23 is a diagram for explaining a conventional DVD disc structure.

FIG. 12 is a block diagram showing a DVD reproducing device as an embodiment of the disc reproducing device applied to the present invention, FIG. 13 is a block diagram functionally showing the DVD reproducing device of FIG. 12, FIG. FIG. 15 is a flowchart for explaining the AVD synchronous reproduction processing, and FIG. 16 is FIG.
2 and a block diagram showing in detail the character display circuit of FIG.
17 is a block diagram showing a modified example of the DVD reproducing device in FIG. 13, and FIG. 18 is a block diagram showing another modified example of the DVD reproducing device in FIG.

The disc format applied to the present invention is roughly composed of a DVD-video section shown in FIG. 3A and a DVD-audio section shown in FIG. 3B. The format of the DVD-video section is composed of a video manager (VMG) at the beginning and areas of a plurality of video title sets (VTS) following it, while the format of the DVD-audio section corresponds to the audio manager (VMS). AMG) and each area of a plurality of audio title sets (ATS) following the AMG.

Each of the VTSs is composed of the leading VTS information (VTSI), followed by one or more video content block sets (VCBS) and the last VTSI, while each of the ATSs corresponds to the leading ATS. Information (ATSI) followed by one or more audio content block sets (A
CBS) and the last ATSI. AT
In SI, the playing time of each song in ACBS is set in real time.

Each of the VCBSs is composed of a plurality of VCBs, while each of the ACBSs is composed of a plurality of ACBs. Each VCB has one title of video (Ti
Each of the ACBs corresponds to one audio album (Album). Each VCB (1 title) has a plurality of chapters (Chapte).
r), on the other hand, each ACB (1 album) is correspondingly composed of a plurality of tracks. Chapters include Part of Title (PTT), and tracks include Part of Title (PTT).
TT) is included.

Each chapter has a plurality of cells (CELL).
On the other hand, each of the tracks has a plurality of indexes corresponding thereto. Each of the cells is composed of a plurality of VCB units (VCBU), while each of the indexes (Index) is correspondingly composed of a plurality of virtual ACBs (ACBs). Each of the VCB unit and the ACB is composed of a plurality of packs, and one pack is composed of 2048 bytes.

Each of the VCB units has a control pack (hereinafter referred to as a CONT pack) at the beginning of 0.4 to 0.4.
It is composed of an arbitrary number of video (V) packs, audio (A) packs, and sub-picture (SP) packs for 1.0 second. On the other hand, each ACB has an arbitrary number of A
It is composed of a pack and a real-time information data (D) pack at intervals of 1.0 second or more. That is, ACB
Is an imaginary unit, and there is no boundary pack in practice.

In the CONT pack, as shown in detail in FIGS. 5 to 7, information for controlling subsequent V packs and the like is arranged. Further, as shown in FIG. 4, audio data is arranged in the A pack, and, for example, closed caption (CC) data other than the audio data is arranged in the V pack in addition to the video data. Further, as shown in FIG. 8, in the D pack, character information regarding the audio data in the A pack and its display time are arranged.

Adjacent A packs A1 and A2 are arranged so that audio signals are related to each other. For example, in the case of stereo, the L channel pack and the R channel pack are arranged adjacent to each other. Also, in the case of 5/6/8 channel multi-channel, they are similarly arranged adjacent to each other. Also, when displaying characters during audio signal reproduction, the A pack and D pack are arranged adjacent to each other, and when displaying video during audio signal reproduction, the V pack (still image) and A pack are displayed. Are arranged adjacent to each other.

The A pack, V pack and D pack are shown in FIG.
As shown in, the 4-byte pack start information, the 6-byte SCR (System Clock Reference) value, and the 3-byte Mux rate for the 2034-byte user data (A data, V data). It is configured by adding a pack header of 14 bytes in total including information and stuffing of 1 byte (1 pack = 2 in total).
048 bytes). In this case, the time stamp SC
By setting the R information as "1" in the first pack in the ACB unit and making it consecutive in the same album, it is possible to manage the time of the A pack in the same album.

Next, the structure of the CONT pack will be described in detail with reference to FIGS. This CONT pack is called a navigation pack, commonly called a navigation (NV) pack in the DVD video standard, and has a 14-byte pack header, a 24-byte system header, a PCI (Presentation Control Information) packet, and a DSI (DIP). Data search information) packet. PCI is called reproduction control information, and this PCI packet consists of a 6-byte packet header and a 1-byte substream ID.
6 is composed of 979 bytes of PCI data (total of 986 bytes), and a DSI packet has a 6-byte packet header, a 1-byte substream ID, and a detailed 1017-byte data shown in FIG. It is composed of DSI data (total of 1024 bytes).

The PCI data is navigation data for controlling the reproduction of VOBU. As shown in detail in FIG. 6, 60-byte PCI general information (PCI GI) and 3
6-byte non-seamless angle information (NSML A
GLI) and 694 bytes of highlight information (HLI)
And 189 bytes of recording information (RECI). Here, VC in FIG.
BU is the same as VOBU in the DVD video standard.

Data search information (DSI) shown in FIG.
Is navigation data for searching data and executing seamless reproduction of VOBU. As shown in detail in FIG. 7, 32 bytes of DSI general information (DSI GI) and 148 bytes of seamless reproduction information (SML). PB
I) and 54 bytes of seamless angle information (SML A
GLI), 168 bytes of VOBU search information (VOBU SR)
I), 144 bytes of synchronization information (SYNCI), and 471 bytes of reserved area, for a total of 1017 bytes.

On the other hand, as shown in FIG. 8, the D pack has a 14-byte pack header, a 24-byte system header, a 1003-byte ACD (audio character real-time information data) packet, and a 1007 byte.
It is composed of byte SEC (Sound Effect Control) packets. The ACD packet has a 6-byte packet header and a 1-byte substream ID.
9 is composed of 676 bytes of ACD (audio character display) information and 294 bytes of audio reproduction control information + 26 bytes of reserved area for a total of 320 bytes. The SEC packet also has a packet header of 6 bytes, a substream ID of 1 byte, and 10 bytes as shown in detail in FIG.
It is composed of 00 bytes of SEC (sound effect control information) data.

Here, FIGS. 9A and 11A show the first example, and FIGS. 9B and 11B show the second example. A 676-byte ACD in the first example
As shown in detail in FIG. 9A, the information area includes a 48-byte general information area, 294-byte information areas of characters "1" and "2", a 16-byte display time control data area, and a 24-byte area. It is composed of the holding area.

Each information area of characters "1" and "2" is 93
Name space area of bytes and 2 of 93 bytes each
It consists of one free space area and a 15-byte data pointer area. In the name space area, for example, 31 bytes of quarter-byte header character data and 62 bytes of full-width and half-width body character data for displaying music titles as shown in FIG. 10 are arranged. 1
In the 6-byte display time control data area, the address (timing time) of the A pack is arranged in 8 bytes as the display start time and end time of the character.

The 48-byte general information is, for example, 1
6 bytes of service level information, 12 bytes of language code information, 6 bytes of character set code information, 6 bytes of display item information, 2 bytes of "difference from previous ACD information" information, and 6 bytes It is composed of reservation information of. The 16-byte service level information indicates the display size, the display type, the audio / video / SP distinction, the stream, etc. Further, the character is the mandatory, and the bitmap is optional. The 6-byte character set code information indicates the language of the characters "1" and "2" in 2 bytes, as in the video file, and indicates a maximum of 8 languages in one file. English is Mandatory.

The 6-byte character set code information can have a maximum of 15 character codes corresponding to the language code, and indicates whether or not there is a language of the characters "1" and "2" and the type in 1 byte. A code example is shown below. 1. ISO646 2. ISO8859-1 3. The MS-JIS 6-byte display item information indicates the free space “1” and “2” shown in FIG. 9, the presence or absence of a data pointer, and the ID. The name space is the mandatory, and the album name, music name, and artist name must be described.

The content of 1000-byte SEC (sound effect control) data shown in FIG. 8 is arbitrary, and is composed of, for example, 40 types of sound effect control information of 25 bytes each. In one type of audio reproduction control information area, 20 bytes of graphic equalizer information, 3 bytes of level balance information and 2 bytes of reverberation additional information are arranged, and this information is selected by the user to control the sound quality of the audio signal. To be done. These pieces of audio reproduction control information are, for example, when the user reproduces the music arranged in the A pack, for example, the genre of the music (classical, jazz, rock, BG).
This data is recommended by a so-called professional mixer so that the sound quality at the time of reproduction becomes the best according to M), and even in the same genre, depending on the playing condition, recording condition, mood, etc. of the music.

The ACD and SEC may be recorded separately in different packs instead of being recorded in the same pack. That is, as a second example of the first embodiment, a pack having only ACD packets as shown in FIG. 11A and a pack having only SEC packets as shown in FIG. 11B are provided. May be. In this case, the packet length is freely set within the range of 2010 bytes. 1 for the packet header to be the first in the ACB
7 bytes, otherwise 14 bytes. The private header is the substream ID (1
Byte), RTI-INFO flag (1 byte) which is a pack type ID, and the like, and is composed of a maximum of 12 bytes.
Real-time information (1979 bytes) is pack type I
When the RTI-INFO flag of D is "0000b", ACD is recorded, and when it is "0001b", SEC is recorded.
Is recorded.

The above-mentioned pack constitutes a disk having a data structure applied to the present invention as shown in FIGS. By the way, as shown in FIG. 23, the data format of a DVD video disc includes only a video title set (VTS), and as shown in FIG.
The data format of the D audio disc includes only the audio title set (ATS). And FIG.
The disc shown in FIG. 1 is a DVD-Avd (audio-AV
Data disc called Video Title Set (V
Both TS) and Audio Title Set (ATS) are included. Also, this ATS is an audio manager (AM
G) and a plurality of ATS <1> and ATS <2>.

Therefore, according to the format shown in FIG. 22, for the audio-only title having the audio data, the first pack containing the audio data and the sound control information relating to the audio data in the first pack are provided. A DVD audio disc having a data structure in which a second pack including an application time control data for controlling the application time and an AMGI management area including information for managing reproduction of the first pack are arranged is realized. .

Further, according to the format shown in FIG. 21, for the audio-only title having the audio data, the first pack including the audio data,
A second pack including sound control information regarding the audio data in the first pack and application time control data for controlling the application time thereof; and an AMGI management area including information for managing reproduction of the first pack. And controlling the reproduction of the first pack containing audio data, the third pack containing video data, and the first and third packs for the title having the audio data and video data. A DVD-Avd disc having a data structure in which a navigation pack of a DVD video standard containing information to be reproduced and a VMGI management area containing information for managing reproduction of the first and third packs are arranged.

Next, with reference to FIG. 24, a method of reproducing the above three types of discs will be described. According to the method, ATS <in FIG.
2> and ATS <1> and ATS <2> in FIG.
It can be played by accessing the ACBS via ATSI by MGI. The method is ...
Indicates that AMGI is used to access the video title. Therefore, the above-mentioned two types of audio discs of the present invention can be reproduced while maintaining compatibility with DVDs as a family of DVDs.

Next, a DVD reproducing apparatus applied to the present invention will be described with reference to FIG. Disk 1 has
The data having the above structure is EFM-modulated and recorded in the form of pits. When music selection, reproduction, fast forward, stop operation, etc. are performed by the operation unit 18 or the remote control device 19, the control unit 23 controls the drive device 2 and the reproduction device 17 according to the operation, and is recorded on the disc 1 during reproduction. After the pit data is read by the drive unit 2, EF
M demodulated.

In the reproducing device 17, this signal is sent to the CONT pack detector 3 and the A pack and D pack detector 9. The CONT pack detector 3 uses C in the reproduced data.
The ONT pack is detected and control parameters are set in the parameter sections 8 and 14, and V packs controlled by the CONT pack are sequentially written in the V pack buffer 4. The user data (video signal, sub-picture information) in the V pack written in the V pack buffer 4 is ordered by the buffer extracting unit 5 in the pack order based on the SCR (see FIG. 4) in the V pack, and in the CONT pack. Are taken out in the order of output time based on the PTS of, and then the image conversion unit 6, the D / A conversion unit 7, the video output terminals 15, 1
It is output as an analog video signal via 5 '. These blocks 3 to 8 constitute a video processing unit 17V,
The video processing unit 17V operates under the control of the control unit 23 when the internal power switch control unit 30 turns on the power switch SW.

The A-pack and D-pack detectors 9 are
A and D are detected by detecting A pack and D pack in the playback data.
The pack buffer 10 is sequentially written. The user data (audio signals) in the A pack written in the A and D pack buffers 10 are instructed by the extracting unit 11 in the pack order based on the SCR, and based on the audio search data in the TOC information. From the PCM conversion unit 12, the D / A conversion unit 1
3. Output as an analog audio signal via the audio output terminal 16.

Further, the display data in the D pack (see FIG. 8,
Audio character display information AC shown in FIG.
D) is sent to the display signal generation unit 20 to generate a display signal, and this display signal is output via the display signal output terminal 22 or output to the built-in character display unit 21.

FIG. 13 is a block diagram functionally showing the configuration shown in FIG. The reproduction means 2 corresponds to the drive device 2 shown in FIG. 12, and reproduction signal processing separation means A / D (9, 1,
0, 11, 14) are A pack and D pack detection units 9, A
Corresponding to the D pack buffer 10, the extraction unit 11 and the parameter unit 14, and audio signal output means (12,
13) corresponds to the PCM converter 12 and the D / A converter 13. The character information output unit 20 corresponds to the display signal generation unit 20, and the display unit 21 corresponds to the character display unit 21. Further, the reproduction signal processing separation means V (3, 4,
5 and 8) correspond to the CONT pack detection unit 3, the V pack buffer 4, the extraction unit 5 and the parameter unit 8, and the video signal output unit and the sub-picture information unit (6 and 7) are the image conversion unit 6 and D / A. It corresponds to the conversion unit 7. The control unit 23 corresponds to the control unit 23.

In FIG. 13, the control means 23 is the operation unit 1
8 or a remote control device 19 sends a command signal for reproducing a target music piece, the target music piece is reproduced from the disc 1 by sending an address control information signal corresponding to the reproduction command to the reproducing means 2. . The reproduction signal processing separation means A / D separates the reproduction data into an audio signal and character information, sends the audio signal to the audio signal output means (12, 13), and outputs the character information to the character information output means 2
Send to 0. The reproduction signal processing separation means V converts the reproduction data into CO
The NT information, the video signal and the sub-picture information are separated and the CONT information is sent to the control means 23, and the video signal and the sub-picture information are sent to the video signal means and the sub-picture information means (6, 7), respectively.

In addition, the TO for a predetermined area of AMGI (audio manager information) or ATSI (audio title set information)
C information is additionally recorded (TOC information is sometimes called SAPP in DVD audio), and the playback device accesses this TOC information and stores it in the memory that constitutes the TOC information storage unit 14A to find the beginning of the song. It can be performed. As this TOC information, information recorded in the lead-in area of the CD can be used.

The TOC information is read at the start of reproduction and stored in the TOC information storage section 14A. When the cue reproduction of a song or movement is designated, the TOC information storage section 14A is referred to and the disc 1 is read. to access. In addition,
This TOC information is also recorded on the disc 1 as shown in FIG.
Lead-in area (TOC area 1a shown)
Is recorded in addition to the TOC detection means 24 at the start of reproduction.
Alternatively, the TOC area 1a may be independently accessed and stored in the TOC information storage unit 14A.

Next, with reference to FIGS. 14 and 15, an AVD using reproduction control information such as TOC information and search information.
The synchronous reproduction process will be described. In FIG. 14, for example, when the cue reproduction of a song or a movement is designated, the TOC information corresponding to the designated position is referred to (step S1), and the location of the cell and index is calculated based on the TOC information (step S1). S2). Then, the place is searched (step S3), and if confirmed, A as shown in detail in FIG.
The pack, the V pack, and the D pack are reproduced synchronously (steps S4 → S5).

In FIG. 15, the CONT pack is reproduced (step S11), and then it is checked whether the time information in the A pack and the V pack are the same time (step S1).
3). If they are not the same time, the CONT pack is adjusted by ± 1 pack (step S14), and then the process returns to step S11 to reproduce the CONT pack.

When the time information in the A pack and the V pack are the same in step S13, the A pack or D pack is reproduced and the A pack address or D pack address (SCR information) is incremented by 1 (step S13).
15), then V controlled by its CONT pack
The pack is reproduced and the V pack address (SCR information) is incremented by 1 (step S16). Then, it is checked whether or not the reproduction of the A pack or the D pack is completed (step S17). If not completed, the process proceeds to step S18, and if completed, the process proceeds to step S20.

In step S18, it is checked whether or not the reproduction of the V pack is completed. If it is not completed, the process returns to step S13, and if it is completed, the process proceeds to step S19. In step S19, the next V pack controlled by the CONT pack is reproduced, and the V pack address is incremented by 1, and step S13 is performed.
Return to. In step S20, the next A pack or D pack is reproduced, the A pack address or D pack address is incremented by 1, and then it is checked whether or not the reproduction of the V pack is completed (step S21). In the case, it returns to step S16, while on the other hand, when it ends, it proceeds to step S23.

In step S23, the next V pack controlled by the CONT pack is reproduced, the V pack address is incremented by 1, and then it is checked whether the end of frame (EOF) has occurred (step S24).
If it is not EOF, the process returns to step S13, while E
In the case of OF, this AVD synchronous reproduction processing is ended. In the case of an audio disc without a CONT pack, the synchronization shown in FIG. 15 is not necessary.

Next, referring to FIG. 16, the character display circuit 2
0 and 21 will be described in detail. The display time data in the D pack is separated into display start time data and display end time data by the display time decoder 51, and these data are applied to the start comparator 52 and the end comparator 53. Further, the character data in the D pack is converted into dot matrix character data for display by the character data decoder 54, and this data is stored in the buffer 55.

Then, the start comparator 52 compares the display start time data with the A pack address being reproduced,
When they match, a dot matrix read start control signal is sent to the buffer 55 and the display 56
A display-on control signal is sent to (21 '). Also,
The end comparator 53 compares the display end time data with the A pack address being reproduced, and when they match, sends a timing signal for outputting the next character time data to the display time decoder 51 and also displays 56 (2).
The display-off control signal is sent to 1 ').

FIG. 17 shows a modification of the first embodiment.
The video processing unit 27V in the DVD reproducing apparatus of FIG. 12 is omitted, and an audio-only reproducing apparatus that does not reproduce a V pack is shown. In this case, the reproduction signal processing separation means 9,
10, 11, 14 are audio signal output means 12, 1
3 pre-reads the SEC information in the D pack prior to the D pack that controls the display of the A pack being output, and the SEC storage unit 1
Store in 4B. In this modification, the character information in the SEC information is displayed as the display means 21 on the flat matrix display 21 '.

FIG. 18 shows, as another modification of the first embodiment, the lead-in area (T in the figure) at the innermost peripheral portion of the disk 1.
It is additionally recorded in the OC area 1a), and when the reproduction starts, the TO
The audio-only reproduction device in which the C detection means 24 independently accesses the TOC area 1a and stores it in the memory constituting the TOC information storage unit 14A is shown. Further, in this configuration, when the audio reproduction control information for reproducing with the sound quality recommended by the professional mixer is recorded in the SEC packet shown in FIG. 8, the sound quality control information output means 31 and the sound quality / level control processing means. 32 is provided and the sound quality is controlled based on this control information.

As shown in FIG. 11, the D pack is AC
In the case of being separated into D and SEC, the identification means is provided in the reproduction signal processing separation means 9'and the identification result indicates that the character information output means 20 and the sound quality /
The level control information output 31 is sorted and supplied. In this case, with the configuration shown in FIG. 26, the sound effect control can be performed using the control start time data and the control end time.

Next, a second embodiment will be described. In the second embodiment, a D pack is provided as in the first embodiment, and character information is arranged in the ACD packet of the D pack as shown in FIG. 9B, but display time data is not arranged. . The display time data (8 × 2 bytes) is placed in the reserved area (471 bytes) of the data search information (DSI) in the CONT pack shown in FIG.

Next, a third embodiment will be described. In the third embodiment, a D pack is provided as in the first embodiment, and character information is arranged in the ACD packet of the D pack as shown in FIG. 9B, but display time data is not arranged. . Then, the display time data (8 × 2 bytes) and the integrated display control data other than the maximum 52 bytes of display time data are arranged in the reserved area (471 bytes) of the data search information (DSI) in the CONT pack shown in FIG. To be done.

The integrated display control data is, for example, display control data for synthesizing and displaying 2 × 8 character information in order to display it on a display device having a larger number of pixels than the display 56 shown in FIG. An 8-byte display start address (address corresponding to the ACD display start address) and an 8-byte division number data are arranged.

FIG. 19 shows a character display circuit for displaying characters in the format of the third embodiment. The display time decoder 51, the start comparator 52, the end comparator 53, the character decoder 54, the buffer 55 and the display 56 are shown. It has the same configuration as in FIG. Here, the buffer 55 and the display 56 are, as shown in FIG. 10, 15 full-width characters (31 half-width characters) per line.
Characters of 2.5 lines can be displayed, and this is one set. The V-RAM 59a in the video display processor 59 has a capacity capable of storing 2 × 8 sets of character information as shown in FIG.

The character display device shown in FIG. 19 has a normal mode in which one set of character information is displayed on the display 56, and
There is a special mode for displaying 2 × 8 sets of character information on an external display device (not shown) through the external output terminal 15 ″, and the operation in the normal mode is substantially the same as that in FIG. The display time data in the CONT pack is separated into display start time data and display end time data by the display time decoder 51, and these data are applied to the start comparator 52 and the end comparator 53. Character data in the D pack Is converted into dot matrix character data for display by the character data decoder 54, and this data is stored in the buffer 55.

Then, the start comparator 52 compares the display start time data with the A pack address being reproduced,
When they match, a dot matrix read start control signal is sent to the buffer 55 and the display 56
A display-on control signal is sent to (21 '). Also,
The end comparator 53 compares the display end time data with the A pack address being reproduced, and when they match, sends a timing signal for outputting the next display time data to the display time decoder 51, and also displays 56 (2).
The display-off control signal is sent to 1 ').

On the other hand, in the special mode, the display time data in the D pack is separated into the display start time data and the display end time data by the display time decoder 51, and these data are started comparator 52 and end comparator 53.
Is also applied to the CPU 60. In addition, the character data in the D pack is the character data decoder 54.
Is converted into dot matrix character data for display, and this data is stored in the buffer 55. further,
The display start address (address corresponding to the display start address of the ACD) and the division number data in the CONT pack are decoded by the integrated display control data decoder 58 and the CPU
Applied to 60.

Then, the start comparator 52 compares the display start time data with the A pack address being reproduced,
When they match, a dot matrix read start control signal is sent to the buffer 55, and the end comparator 53 compares the display end time data with the A pack address being reproduced. Sends a timing signal for outputting display time data for the set.

Then, the CPU 60 checks the display start time data of each set decoded by the display time decoder 51 based on the display start address and the division number data of each set decoded by the general display control data decoder 58, When they match, one set of write addresses is designated to the V-RAM 59a in the display processor 59.

As a result, one set of dot matrix data read from the buffer 55 is designated by the CPU 60 to the V-RAM 59a in the video display processor 59 based on the display start address and the division number data. The dot matrix data for 16 sets are written in the address, and the same applies to V-R.
Written in AM 59a. The video display processor 59 develops these 16 sets of dot matrix data into a video signal for one screen, and this video signal is output to an external display device (not shown) via the external output terminal 15 ″.

[0066]

As described above, according to the present invention, the character information regarding the audio data in the first pack and the display time control data for controlling the display time thereof are arranged in the second pack, A for managing the playback of the pack
It is arranged in the MGI management area, and the video pack including the video data and the data for controlling the video data are not recorded, and the character information indicating the contents of the audio data such as the music source is efficiently recorded from the disc. Can be reproduced and displayed as desired.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an audio signal encoding apparatus applied to the present invention.

FIG. 2 is a block diagram showing the signal processing circuit of FIG. 1 in detail.

FIG. 3 is an explanatory diagram showing a format of a disc applied to the present invention.

FIG. 4 is an explanatory diagram showing in detail formats of an audio pack and a video pack of FIG.

5 is an explanatory diagram showing the format of a control (CONT) pack of FIG. 3 in detail.

6 is an explanatory diagram showing the PCI data of FIG. 5 in detail.

FIG. 7 is an explanatory diagram showing the data search information (DSI) of FIG. 5 in detail.

8 is an explanatory diagram showing the format of the real-time information data (D) pack of FIG. 3 in detail.

9 is an audio character display of FIG. 8 (A
It is explanatory drawing which shows the format of a (CD) area in detail.

FIG. 10 is an explanatory diagram showing an example displayed by the namespace information of FIG.

FIG. 11 is an explanatory diagram showing another format of the real-time information data (D) pack of FIG. 3 in detail.

FIG. 12 is a block diagram showing a DVD reproducing device as an embodiment of a disc reproducing device applied to the present invention.

13 is a block diagram functionally showing the DVD reproducing apparatus of FIG.

FIG. 14 is a flowchart illustrating an AVD synchronous reproduction process.

FIG. 15 is a flowchart illustrating an AVD synchronous reproduction process.

16 is a block diagram showing the character display circuit of FIGS. 12 and 13 in detail.

FIG. 17 is a block diagram showing a modification of the DVD reproducing device in FIG.

FIG. 18 is a block diagram showing another modification of the DVD reproducing device in FIG.

FIG. 19 is a block diagram showing in detail a character display circuit according to a third embodiment.

20 is an explanatory diagram showing a recording area of the V-RAM of FIG.

FIG. 21 is an explanatory diagram showing a data structure of a DVD-Avd disc according to the present invention.

FIG. 22 is an explanatory diagram showing a data structure of a DVD audio disc according to the present invention.

FIG. 23 is an explanatory diagram showing a structure of a conventional DVD video disc.

FIG. 24 is an explanatory diagram showing a method of reproducing the disc shown in FIGS. 22 to 24.

FIG. 25 is a flowchart showing a process of discriminating between a character information recording disc and a sound control recording disc.

FIG. 26 is a block diagram showing a sound control circuit in detail.

[Explanation of symbols]

1 Disc 2 Playback Means 34 DVD Formatting Unit (Formatting Means) 51 Display Time Decoder (Second Decoding Means) 52 Start Comparator 53 End Comparator 54 Character Data Decoder (First Decoding Means) 55 Buffer 56 Display (Start Comparator) 52, end comparator 53, and buffer 55 constitute character information display means) 58 integrated display control data decoder (second decoding means) 59 video display processor (constitutes character information display means together with CPU 60) 60 CPU

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tokuhiko Fuchigami             3-12 Moriya-cho, Kanagawa-ku, Yokohama-shi, Kanagawa             Local Victor Company of Japan, Ltd. F-term (reference) 5D044 AB05 AB09 BC02 CC06 DE02                       DE03 DE12 DE14 DE18 DE25                       DE39 GK12 HL04                 5D110 AA14 AA27 AA29 BB25 BB27                       CF05 DA04 DA17

Claims (4)

[Claims] 1. A disk in which a recording area for an auxiliary signal and a recording area for a main signal are continuously arranged, and a first pack containing audio data in the recording area for the main signal,
A second pack including character information to be reproduced together with the audio data in the first pack, display time control data for controlling the display time thereof, and a plurality of language codes of the characters, the contents of which are characters. It has a data structure in which a second pack having a flag (RTI_INFO flag) for identifying information related data and an AMGI management area containing information for controlling reproduction of the first pack are arranged. Disc reproducing method for reproducing a disc in which an audio title set (ATS) including a second pack and a second pack is recorded, and a video pack including video data and a data for controlling the video data are not recorded. Playing back at least a first pack and a second pack from the disc; A first decoding step of decoding character information relating to the audio data from the first pack reproduced by the step, and a display time control data from the second pack reproduced by the reproducing step and a language indicating the type of the language. A second decoding step of decoding the code, and character information decoded by the first decoding step are converted into desired information based on the display time control data decoded by the second decoding step and its language code. A disc reproducing method comprising: a step of displaying in language; and a third decoding step of decoding the audio data from the first pack reproduced in the reproducing step. 2. The disc reproducing method according to claim 1, wherein the maximum number of the language codes is eight. 3. A disc in which a recording area for an auxiliary signal and a recording area for a main signal are continuously arranged, and a first pack containing audio data in the recording area for the main signal,
A second pack including a plurality of character information to be reproduced together with the audio data in the first pack, display time control data for controlling a display time thereof, and a plurality of language codes indicating a type of the language. It has a data structure in which a second pack having a flag (RTI_INFO flag) for identifying the content as character information related data and an AMGI management area containing information for controlling reproduction of the first pack are arranged. An audio title set (ATS) including the first pack and the second pack is recorded, and a video pack including video data and data for controlling the video data are not recorded in the disc. Is encoded and recorded, and the character information is reproduced from the recorded disc together with audio data. Recording and reproducing method of that audio signal. 4. The audio signal recording / reproducing method according to claim 3, wherein the maximum number of the language codes is eight.