JP3248679B2 - Disc 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 a method for reading character information indicating a song name of an audio signal from a disk.
Disc used to display information recorded by
Regarding raw equipment .

[0002]

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

[0003]

However, since character information indicating the contents of a music source is scattered and recorded on a disk in a CD, the character information follows the music source being reproduced and changes instantaneously. Therefore, it is difficult to display the character (V) with respect to the music source (A) being reproduced.

In the case of a DVD (Digital Versatile Disc) -video disc, when recording a subtitle superimposed on a moving image such as a movie, the video is continuously arranged and recorded. However, when considering a DVD audio disk 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.

[0005] The present invention has been made in view of the problems described above, and audio data such as music source, character information indicating the contents of its
It is an object of the present invention to provide a disc reproducing apparatus capable of displaying the recorded information from a recorded disc .

[0006]

This prior invention SUMMARY OF THE INVENTION consists following means to achieve the above object. That is, the auxiliary signal
The signal recording area and the main signal recording area are
Disc, and the recording area of the main signal has an audio
An audio pack containing audio data,
Display that controls textual information about data and its display time
A character display pack containing time control data;
Management pack containing information for managing
And the audio pack and the character display pack.
Audio title set (ATS) containing
Video pack containing video data and the video
Disk that does not record the data that controls the
A disc reproducing apparatus for reproducing a disc, wherein the disc
Audio packs, character display packs and management packs from
Playback means for playing back, and playback by the playback means
Characters related to the audio data from the character display pack
First decoding means for decoding information;
Display time control data from the character display pack played by the column
Second decoding means for decoding the data,
The character information decoded by the decoding means is stored in the second
Display time control data decoded by the decoding means
Character information display means for displaying based on the data.
Disc playback device.

[0007]

[0008]

[0009]

[0010]

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is suitable for the present invention.
Block diagram illustrating one embodiment of the encoding apparatus of use are Ru audio signal, FIG. 2 is a block diagram showing in detail the signal processing circuit of FIG.

Next, the configuration of the encoder will be described in detail with reference to FIG. An analog audio signal is input to an input terminal IN, and this input signal is input to an A / D converter 31.
Is sampled at a sufficiently high sampling frequency (sampling period Δt), for example, 192 kHz, is converted into a 24-bit high-resolution PCM signal, for example, and a data sequence xb1, x1, xa1, x2, xb2 corresponding to a high-resolution curve α. , X3, xa2, ..., x
bi, x2i-1, xai, x2i,...

This data sequence (xbi, x2i-1, xai, x2
i) is a signal processing circuit 32 and a memory 3 shown in detail in FIG.
3 and then the DVD encoding circuit 34
Is packed in the DVD audio format. This packing data is output to the output terminal OUT1, or is modulated by the modulation circuit 35 in a modulation method according to the medium and output to the output terminal OUT2.

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 that passes a half band, for example, an FIR filter.
i, x2i), a data sequence xc1, *, *, *, xc2, *, *, *, xc3, *, *, corresponding to the band-limited low-resolution curve β
*,..., Xci, *, *, *,..., And by thinning out the data "*" from the data string by the thinning circuit 37, the data string xc1, xc2, xc3,. , Xci, ... are generated. Here, the data sequence xci is a data sequence in which the sampling frequency is reduced to ４ by limiting the band of the digital data A / D converted by the A / D converter 31. In addition, data strings (xbi, x2i-1, xai, x
2i), the data sequence xb1, xa1, xb2, xa2,..., Xbi, xai,.

Then, these data strings xci, xbi, x
Based on ai, the adder 39 acting as a difference calculator calculates the difference xbi−xci = Δ1i xai−xci = Δ2i. Here, the difference data Δ1i and Δ2i are, for example, 24 bits or less, and the number of bits may be fixed or variable. The allocation circuit 40 packs the data sequence xci and the difference data Δ1i, Δ2i into user data (see FIG. 5) (1 packet = 2034 bytes),
The user data is output to the DVD encoding circuit 34.

The DVD encoding circuit 34 also records character information indicating the contents of the music source and its display time in addition to the main music source on a DVD-Audio disc as shown in FIG. Packing recording information in such a format.

FIG. 3 shows a DVD-Video format,
DVD as one embodiment of a disk that will be applied to the present invention
FIG. 4 is an explanatory diagram showing an audio format, and FIG.
Audio Content Block Unit (ACBU)
FIG. 5 is an explanatory diagram showing the format of the audio pack and the video pack of FIG. 4 in detail, and FIG. 6 is an audio control (A-CON) of FIG.
FIG. 7 is an explanatory diagram showing the format of the audio character display (ACD) area in FIG. 6 in detail, and FIG. 8 is an explanatory diagram showing an example displayed by the namespace information in FIG. ,
9 is an explanatory diagram showing the format of the audio search data (ASD) area in FIG. 6 in detail, and FIG. 10 is an explanatory diagram showing a modification of the audio content block unit in FIG.

Further, FIG. 11 is a block diagram showing a DVD reproduction apparatus as an embodiment of a disc reproducing apparatus that apply to the present invention, FIG 12 is a block diagram showing a DVD reproducing apparatus shown in FIG. 11 functionally, 13 and FIG. 14 is a flowchart for explaining the AV synchronous reproduction process, FIG. 15 is a block diagram showing the character display circuit of FIGS. 11 and 12 in detail, and FIG.
6 is a block diagram showing a modified example of the DVD reproducing device of FIG. 13, and FIG. 17 is a block diagram showing another modified example of the DVD reproducing device of FIG.

FIGS. 3A and 3B show DVD-Video and DVD-Audio formats, respectively.
The VD-audio format is compatible with DVD-Video, though the area name is different. First, the DVD-video format is roughly divided into a video manager (VMG) at the head and areas following a plurality of video title sets (VTS).
The audio format is correspondingly constituted by an audio manager (AMG) and each area of a plurality of audio title sets (ATS) following the AMG.

Each of the VTSs is composed of the first 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 first ATS. Information (ATSI) followed by one or more audio content block sets (A
CBS) and the last ATSI. AT
The performance time of each music piece in the ACBS is set in SI 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 video title (Ti
tre), and each of the ACBs is corresponding to one audio album. Each VCB (one title) has a plurality of chapters (Chapter).
r), while each ACB (one album) is correspondingly composed of a plurality of tracks (Tracks). The chapter contains a part of title (PTT) and the track is a part of album (PTT).
TA).

Each of the chapters includes a plurality of cells (CELL).
On the other hand, each of the tracks is correspondingly constituted by a plurality of indexes (Index). Each cell has a plurality of VCB units (VCBU)
On the other hand, each index is correspondingly constituted by a plurality of ACB units (ACBU). Each of the VCB unit and ACB unit is
Each pack is composed of a plurality of packs, and one pack is composed of 2048 bytes.

Each VCB unit is composed of a head control pack (hereinafter referred to as a CONT pack), followed by a plurality of video (V) packs, audio (A) packs, and sub-picture (SP) packs.
Each of the CB units has a corresponding audio control pack (hereinafter referred to as A-CONT pack)
, Followed by a plurality of A packs and V packs.

In the CONT pack, information for controlling the succeeding V pack is arranged, and in the A-CONT pack, the T of the CD is stored.
Information for managing the audio signal of the succeeding A-pack, such as OC information, is arranged. A pack contains audio data, and V pack contains video data,
For example, closed caption (CC) data other than audio data is arranged.

Next, the A pack in which the audio stream is recorded and its control pack will be described. As shown in FIG. 4, the VCB unit is constituted by an arbitrary number of packs for 0.4 to 1.0 seconds, while the ACB unit is constituted by an arbitrary number of packs for 0.5 to 1.0 seconds. Have been. The A-CONT pack in the DVD-Audio ACB unit is a DVD-Video VCB.
It is arranged in the third pack in the unit.

The A-CONT pack is basically arranged in units of 0.5 second of the audio time, and is arranged so as to be completed within the range of 0.5 to 1.0 second at the break of the index. Also, audio time (GOF: Group of Audio)
(Frame unit) is indicated by the A-CONT pack, and the data position is determined by the number of the audio frame number, the first access unit pointer, and the frame header. The A-pack immediately before the A-CONT pack is
Do not force padding to 0.5 seconds of audio time.

Adjacent A-packs are arranged so that audio signals are related to each other. For example, in the case of stereo, an L-channel pack and an R-channel pack are arranged adjacently. Similarly, in the case of multi-channel, they are arranged adjacently. The V pack is arranged adjacent to the A pack when displaying an image during reproduction of an audio signal.

As shown in FIG. 5, the A pack and the V pack each have 2034 bytes of user data (A data and V data).
4 bytes of pack start information, 6 bytes of SCR (System Clock Reference) information, 3 bytes of Mux rate information, and 1 byte of stuffing, a total of 14 bytes of pack header are added. (1 pack = 2048 bytes in total). In this case, the time stamp SCR information is
In the first pack in the ACB unit, the time of the A pack in the same album can be managed by setting “1” to be continuous in the same album.

On the other hand, as shown in FIG. 6, the A-CONT pack has a pack header of 14 bytes, a system header of 24 bytes, an ACD (audio character display) packet of 1003 bytes, and an ASD (audio character display) of 1007 bytes. Audio search data) packet. The ACD packet has a 6-byte packet header, a 1-byte substream ID,
It is composed of 676 bytes of ACD (audio character display) information and 320 bytes of audio reproduction control information as shown in detail in FIG. A
The SD packet also has a 6-byte packet header and 1
Byte substream ID and 1000 byte ASD (Audio Search Data) as detailed in FIG.
It consists of.

Here, FIG. 7A and FIG. 9A show the first
FIG. 7B and FIG. 9B show a second example. The ACD information area of 676 bytes in the first example has a general information area of 48 bytes, an information area of 294 bytes of characters "1" and "2", and an information area of 16 bytes as shown in detail in FIG. The display control data area of FIG. Each information area of the characters "1" and "2" is composed of a 93-byte name space area, two 93-byte free space areas, and a 15-byte data pointer area. In the name space area, for example, to display a song name as shown in FIG.
1-byte 1 / 4-byte character data for header and 62-byte full-size and half-size character data for text are arranged. 16
In the byte display time data area, the address (timing time) of the A-pack is arranged in 8 bytes as both the character display start time and the character display time.

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 , And the hold information. The 16-byte service level information indicates display size, display type, audio / video / SP discrimination, stream, and the like. Characters are mandatory, and bitmap is optional. The 12-byte language set code information consists of characters "1" and "2" as in the video file.
Language is indicated by 2 bytes each, up to 8 in one file
Indicates the language. English is mandatory.

The 6-byte character set code information can have a maximum of 15 character codes corresponding to the language codes, and indicates the presence / absence and type of the characters "1" and "2" 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 spaces “1” and “2”, the presence / absence of a data pointer, and the ID shown in FIG. The namespace is mandatory, and the album name, music name, and artist name must be described.

The contents of the 294-byte audio reproduction control information area shown in FIG. 6 are arbitrary, for example, 10 types of 25-byte audio reproduction control information areas (2
50 bytes) and a 44-byte reserved area. One type of audio reproduction control information area contains 20
Byte graphic equalizer information, 3-byte level balance information, and 2-byte reverberation additional information are arranged, and this information is selected by the user to control the sound quality of the audio signal. When the user reproduces the music arranged in the A-pack, the audio reproduction control information is set according to, for example, the genre (classical, jazz, rock, BGM) of the music, or even if the genre is the same. This data is recommended by a so-called professional mixer so that the sound quality at the time of reproduction is optimized according to the performance state, recording state, atmosphere, and the like of the music.

As shown in detail in FIG. 9A, a 1000-byte ASD (audio search data) has 16-byte general information, 8-byte current number information,
16-byte current time information, 8-byte album set search information, 8-byte album search information,
It is composed of track search information of 04 bytes, index search information of 408 bytes, highlight search information of 80 bytes, and a reserved area of 52 bytes.

The character display time data may be recorded in the ASD area instead of the ACD area. That is, as a second example of the first embodiment,
As shown in FIG. 7B, the 16-byte character control data of the ACD area is set as a reserved area, and all 40-byte areas are set as reserved areas. Instead, as shown in FIG. The 16 bytes of the reserved area may be used as the character display time data, and the remaining 36 bytes may be used as the reserved area.

Note that the ACBU in FIG.
Although it includes the NT pack and the CONT pack, the configuration may be such that the V pack and the CONT pack are not included as shown in FIG. In this case, the video signal is not recorded, but the recording capacity of the audio signal is increased, the disc size can be reduced, and the reproduction function can be simplified, so that the portable reproduction is possible. Anything suitable for the device can be provided.

Next, a DV according to the present invention will be described with reference to FIG.
The D playback device will be described. On the DVD audio disk 1, data having the above structure is EFM-modulated and recorded in the form of pits. Operation unit 18 and remote control device 1
When a music selection, reproduction, fast forward, stop operation, etc. are performed by the control unit 9, the control unit 23 responds to the operation by the drive unit 2
During playback, the pit data recorded on the disk 1 is read by the drive device 2 and then subjected to EFM demodulation.

In the reproducing device 17, this signal is sent to the CONT pack detecting section 3 and the A-CONT pack detecting section 9. The CONT pack detector 3 detects the CO in the reproduced data.
Detects NT pack and sets control parameters in parameter section 8
And the V pack controlled by the CONT pack is sequentially written into the V pack buffer 4. The user data (video signal, sub-picture information) in the V pack written in the buffer 4 is stored in the pack order by the extracting unit 5 based on the SCR (see FIG. 5) in the V pack, and the PTS in the CONT pack. They are extracted in the order of output time based on the output time, and then output as analog video signals via the image converter 6, the D / A converter 7, and the video output terminals 15, 15 '. These blocks 3 to 8 constitute a video processing unit 17V. This 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-CONT pack detecting section 9 detects the A-CONT pack in the reproduced data, sets the control parameters in the parameter section 14, and sets the A-CONT pack.
The A pack controlled by the T pack is sequentially written into the A pack buffer 10. The user data (audio signal) in the A-pack written in the buffer 10 is extracted by the extracting unit 11 in the order of the pack based on the SCR.
The audio search data ASD in the CONT pack is extracted in the order of the output time based on the current time (see FIG. 9) of the audio search data ASD, and then output as an analog audio signal via the PCM conversion unit 12, the D / A conversion unit 13, and the audio output terminal 16. Is done.

The display data (the audio character display information ACD shown in FIGS. 7 and 8) in the A-CONT pack is sent to the display signal generator 20 to generate a display signal. It is output via the output terminal 22 or to the built-in character display unit 21.

FIG. 12 is a block diagram functionally showing the configuration shown in FIG. The reproducing means 2 corresponds to the drive device 2 shown in FIG. 11, and the reproduced signal processing separating means A (9, 10,.
11 and 14) correspond to the A-CONT pack detection unit 9, the A-pack buffer 10, the extraction unit 11 and the parameter unit 14, and the audio signal output means (12 and 13) is a PC.
It corresponds to the M conversion unit 12 and the D / A conversion unit 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. The reproduction signal processing / separating means V (3, 4, 5, 8)
The video signal unit and the sub-picture information unit (6, 7) correspond to the NT pack detection unit 3, the V-pack buffer 4, the extraction unit 5, and the parameter unit 8, and the image conversion unit 6 and the D / A
It corresponds to the conversion unit 7. The control means 23 corresponds to the control unit 23.

In FIG. 12, the control means 23 is the operation unit 1
When a command signal for reproducing the target music is sent from the remote controller 8 or the remote controller 19, the target music 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 separates the reproduction data and sends A-CONT information to the control means 23, sends an audio signal to the audio signal output means (12, 13), and sends character information to the character information output means 20. The reproduction signal processing separation means V separates the reproduction data and sends the CONT information to the control means 23, and sends the video signal and the sub-picture information to the video signal means and the sub-picture information means (6, 7), respectively.

Further, TOC information is additionally recorded in an empty area of AMGI (audio manager information) and ATSI (audio title set information) and a reserved area in an ACD packet of the A-CONT pack shown in FIG. Then, the playback device can access the TOC information, store the TOC information in the TOC information storage unit 14A, and find the beginning of the music. As the TOC information, information recorded in a lead-in area of a CD can be used.

The TOC information is read at the start of the reproduction and stored in the memory constituting the TOC information storage section 14A. When the start reproduction of the music or movement is designated, the TOC information storage section 14A is referred to. To access the disk 1. Note that this TOC information also includes AMGI, A
In addition to recording on the TSI or A-CONT pack, the information is additionally recorded on a lead-in area (TOC area 1a in the figure) at the innermost periphery of the disc 1 as shown in FIG. This TOC area 1a
May be independently accessed and stored in the TOC information storage unit 14A.

Next, an AV synchronous reproduction process using reproduction control information such as TOC information and search information will be described with reference to FIGS. In FIG. 11, for example, when heading reproduction of a song or a movement is designated, the TOC information corresponding to the designated position is referred to (step S1),
The cell and index locations are calculated based on the OC information (step S2). Next, the location is searched (step S3), and upon confirmation, A and V synchronous reproduction as shown in detail in FIG. 14 is performed (step S4 → S5).

In FIG. 14, the CONT pack is reproduced (step S11), then the A-CONT pack is reproduced (step S12), and then the CONT pack and AC are reproduced.
It is checked whether the time information in the ONT pack is the same time (step S13). If the time is not the same, both the CONT pack and the A-CONT pack are ± 1.
The amount is adjusted by the pack (step S14), and the process returns to steps S11 and S12 to return the CONT pack and AC.
Play the ONT pack. In step S14,
One of the CONT pack and the A-CONT pack may be adjusted by ± 1 pack to reproduce the pack.

When the time information in the CONT pack and the time information in the A-CONT pack are the same in step S13, the A pack controlled by the A-CONT pack is reproduced and the A pack address (SCR information) is incremented by one. (Step S15), and then the CONT
Play V pack controlled by pack and V
The pack address (SCR information) is incremented by one (step S16). Next, it is checked whether or not the reproduction of the A-pack has been completed (step S17). If it has not been completed, the process proceeds to step S18, and if it has been completed, the process proceeds to step S20.

In step S18, it is checked whether or not the reproduction of the V-pack has been completed. If the reproduction has not been completed, the flow returns to step S13. If the reproduction has been completed, the flow proceeds to step S19. In step S19, the next V pack controlled by the CONT pack is reproduced and V
The pack address is incremented by one, and step S1
Return to 3. In step S20, the next A-pack controlled by the A-CONT pack is reproduced, the A-pack address is incremented by one, and it is checked whether the reproduction of the V-pack is completed (step S2).
1) If not finished, proceed to step S22,
On the other hand, if the processing has been completed, the process proceeds to step S23.

In step S22, it is checked whether or not the A pack controlled by the A-CONT pack is the last pack. If it is not the last pack, the process returns to step S16. If it is the last pack, the process returns to step S12. To reproduce the next A-CONT pack. Step S23
Then, the next V pack controlled by the CONT pack is reproduced, and the V pack address is incremented by one. Then, it is checked whether or not the end of the frame (EOF) has been reached (step S24). And, on the other hand, in the case of EOF, this AV
The synchronous playback processing ends.

Next, the operation of the character information output means 20 for displaying characters and the operation of the flat matrix display 21 'will be described in detail with reference to FIG. The display time data in the A-CONT pack is separated into display start time data and display end time data by a display time decoder 51, and these data are applied to a start comparator 52 and an end comparator 53. The character data in the A-CONT pack is converted by the character data decoder 54 into dot matrix character data for display, 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, and
When they match, a dot matrix read start control signal is sent to the buffer 55 and the display 56 is displayed.
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 displays the display 56 (2).
A display-off control signal is sent to 1 ').

FIG. 16 shows a modification of the first embodiment.
As shown in FIG. 10, there is shown a device for reproducing a disc configured not to include the V pack and the CONT pack but to include only the A pack and the A-CONT pack, and the video processing unit 17V illustrated in FIG. 11 is omitted. . The A-CONT pack in the A-CONT pack before the A-CONT pack controlling the A-pack being output by the audio signal output means 12 and 13 is also provided.
The CD information may be read in advance and stored in the ACD storage unit 14B, and the character information in the ACD information may be displayed on the flat matrix display 21 'as the display unit 21. Note that the synchronization shown in FIG. 14 is not required for an audio disc without a CONT pack.

FIG. 17 shows another modification of the first embodiment, in which the additional recording is performed in the lead-in area (TOC area 1a in the figure) of the innermost periphery of the disk 1, and the TOC detecting means is provided at the start of reproduction. Reference numeral 24 denotes a reproducing apparatus that independently accesses the TOC area 1a and stores the TOC area 1a in the TOC information storage unit 14A. Further, in this configuration, A shown in FIG.
When audio reproduction control information for reproducing with a sound quality recommended by a professional mixer is recorded in a CD packet, a sound quality / level control information output means 31 and a sound quality / level control processing means 32 are provided, and this control information is provided. The sound quality / level is controlled based on the sound quality / level. Further, the time control of the sound quality / level control information may be performed in the block having the configuration as shown in FIG. 15 using the control start time data and the control end time data.

Next, a second embodiment will be described with reference to FIGS. FIG. 18 is an explanatory diagram showing a DVD-audio format in comparison with a DVD-video format as a second embodiment, FIG. 19 is an explanatory diagram showing the format of an audio content block unit (ACBU) in FIG. 18, and FIG. Is an explanatory diagram showing a modification of the audio content block unit in FIG. 19;
FIG. 21 shows the audio control (A) shown in FIGS.
-CONT) pack format, FIG. 22 is a detailed view of the display (D) pack format of FIGS. 18 and 19, and FIG. 23 is a DVD playback device as a disc playback device of the second embodiment. FIG. 24 is a block diagram functionally showing the DVD reproducing apparatus of FIG. 23, and FIG. 25 is an AV diagram of the second embodiment.
FIG. 26 is a flowchart for explaining the D-synchronous reproduction processing, FIG. 26 is a block diagram showing a modification of the DVD reproduction apparatus,
FIG. 7 is a block diagram showing another modification of the DVD reproducing apparatus.

Here, in the first embodiment, audio character display (ACD) information is arranged in the A-CONT pack, but in the second embodiment, FIG.
8. As shown in FIG. 19, a dedicated display (D) pack is provided in addition to the A-CONT pack, the A pack, and the V pack, and is arranged in the D pack. Also, as shown in FIG. 20, when the configuration is such that the V pack and the CONT pack are not included corresponding to FIG. 10 of the first embodiment, as shown in FIG.
A D pack is provided and ACD information is arranged in the D pack.

The A-CONT pack of the second embodiment has a 14-byte pack header in which the area of the ACD packet (1003 bytes) of the first embodiment is set as a spare packet as shown in FIG. 24 bytes of system header, 1003 bytes of spare packet and 1007
It is composed of a byte ASD packet. And D
As shown in FIG. 22, the pack includes a pack header of 14 bytes, a system header of 24 bytes, an ACD (audio character display) packet of 1003 bytes, and a spare packet of 1007 bytes.
Here, both the character information and the display time data are arranged in the ACD packet in the D pack as shown in FIG. 7A, and the ASD packet in the A-CONT pack is shown in FIG. 9A. The display time data is not arranged as described above.

In the reproducing apparatus according to the second embodiment, D packs are processed in a series of A packs. That is, in the DVD video reproducing device, as shown in FIGS. 23 and 24, the D pack and the A pack are controlled by the A-CONT pack and stored in the buffer 10, and the D pack is the display signal signal generator 20 and the character display unit 21. Is processed and displayed. The D-pack synchronous reproduction process is also performed in step S shown in FIG.
As in 15, S17, and S20, the value is incremented for each pack address and synchronized with the A pack and the V pack.
Further, in the case of a DVD audio reproducing apparatus, similarly, FIG.
6. As shown in FIG. 27, the D-pack is
0, processed and displayed by the character display unit 21 '. FIG. 27 shows a configuration in which when audio reproduction control information is further recorded, a sound quality / level control information output means 31 and a sound quality / level control processing means 32 are provided to control sound quality / level based on the control information. ing.

Next, a third embodiment will be described. In the third embodiment, A-CO is used as in the second embodiment.
A D pack is provided in addition to the NT pack. However, the character information is arranged in the ACD packet of the D pack as shown in FIG. 7B, but the display time data is not arranged, and the display time data is A-CONT as shown in FIG. 9B. It is placed in the ASD packet of the pack.

Next, a fourth embodiment will be described. In the fourth embodiment, A-CO is used as in the second embodiment.
A D pack is provided in addition to the NT pack. As shown in FIG. 7A, the ACD packet in the D pack includes character information, a display start address, and a display end address.
6-byte display time data is arranged, and A-
In the ASD packet of the CONT pack, general display control data other than the display time data is arranged.

Here, referring to FIG. 9B, AC
The ASD packet of the ONT pack also has a display time data area of 16 bytes and a holding area of 36 bytes (total of 5 bytes).
2 bytes). Therefore, in the fourth embodiment, the maximum display control data of a maximum of 52 bytes is arranged for the ASD packet, and as an example, in order to display on a display device having a larger number of pixels than the display 56 (21 ') shown in FIG. As display control data for synthesizing and displaying 2.times.8 character information, an 8-byte display start address (an address corresponding to the display start address of the ACD) and the same 8-byte division number data are arranged. .

FIG. 28 shows a character display circuit for displaying characters in the format of the fourth embodiment. A display time decoder 51, a start comparator 52, an end comparator 53, a character decoder 54, a buffer 55 and a display 56 This is the same configuration as FIG. Here, as shown in FIG. 8, the buffer 55 and the display 56 are composed of 15 double-byte characters (31 single-byte characters) × 2.
It is configured to display five lines of characters, 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. 28 has a normal mode in which one set of character information is displayed on the display 56,
There is a special mode in which 2 × 8 sets of character information are displayed on an external display device (not shown) via the external output terminal 15 ″, and the operation in the normal mode is substantially the same as in FIG.
That is, in the normal mode, 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. The character data in the D pack is converted by the character data decoder 54 into dot matrix character data for display, and this data is stored in the buffer 55.

The start comparator 52 compares the display start time data with the A-pack address being reproduced, and
When they match, a dot matrix read start control signal is sent to the buffer 55 and the display 56 is displayed.
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 displays the display 56 (2
A 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 by the display time decoder 51 into display start time data and display end time data.
Is applied to the CPU 60 as well. Further, the character data in the D pack is transmitted to the character data decoder 54.
Is converted into dot matrix character data for display, and this data is stored in the buffer 55. Furthermore, A
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 general display control data
Applied to U60.

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

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, a set of write addresses is specified to the V-RAM 59a in the display processor 59.

Thus, one set of dot matrix data read from the buffer 55 is specified 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. Is written to the same address, and similarly, 16 sets of dot matrix data are written in the V-R
It is written to AM 59a. The video display processor 59 expands the 16 sets of dot matrix data into a video signal of one screen, and the video signal is output to an external display device (not shown) via the external output terminal 15 ″.

[0075]

As described above, according to the present invention, character information relating to audio data and display time control data for controlling the display time thereof are arranged in a management pack including information for managing an audio pack, it is possible to avoid recording the data for controlling the video packs and video data containing the audio data, such as music source mainly recorded disc, for displaying character information indicating their recorded contents efficiently .

[Brief description of the drawings]

1 is a block diagram showing an embodiment of the encoding device applied Ru audio signal present invention.

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

FIG. 3 shows a format of a DVD-video and a format suitable for the present invention.
As an embodiment of a disc that will be use DVD- is an explanatory diagram showing a format of the audio.

FIG. 4 is an explanatory diagram showing a format of an audio content block unit (ACBU) of FIG. 3;

FIG. 5 is an explanatory diagram showing the format of the audio pack and the video pack of FIG. 4 in detail;

FIG. 6 shows the audio control (A-CON) of FIG.
FIG. 4 is an explanatory diagram showing the format of a T) pack in detail.

FIG. 7 shows the audio character display (A) shown in FIG.
FIG. 3 is an explanatory diagram showing the format of a (CD) area in detail.

FIG. 8 is an explanatory diagram showing an example displayed by the namespace information of FIG. 7;

FIG. 9 is an explanatory diagram showing a format of an audio search data (ASD) area in FIG. 6 in detail.

FIG. 10 is an explanatory diagram showing a modification of the audio content block unit of FIG. 4;

FIG. 11 is a block diagram showing a DVD playback device as one embodiment of a disc playback device according to the present invention.

FIG. 12 is a block diagram functionally showing the DVD playback device of FIG. 11;

FIG. 13 is a flowchart illustrating an AV synchronous reproduction process.

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

FIG. 15 is a block diagram showing the character display circuit of FIGS. 11 and 12 in detail.

FIG. 16 is a block diagram showing a modified example of the DVD reproducing apparatus of FIG.

FIG. 17 is a block diagram showing another modified example of the DVD reproducing apparatus of FIG.

FIG. 18 is an explanatory diagram showing a DVD-Audio format as a second embodiment.

FIG. 19 is an explanatory diagram showing a format of an audio content block unit (ACBU) in FIG. 18;

FIG. 20 is an explanatory diagram showing a modification of the audio content block unit in FIG. 19;

FIG. 21 is an explanatory diagram showing the format of the audio control (A-CONT) pack of FIGS. 18 and 19 in detail.

FIG. 22 is an explanatory diagram showing the format of the display (D) pack of FIGS. 18 and 19 in detail.

FIG. 23 shows D as a disk reproducing apparatus according to the second embodiment.
FIG. 3 is a block diagram illustrating a VD playback device.

24 is a block diagram functionally showing the DVD playback device of FIG. 23.

FIG. 25 is a flowchart for explaining an AVD synchronous reproduction process of the second embodiment.

FIG. 26 is a block diagram showing a modified example of the DVD playback device of the second embodiment.

FIG. 27 is a block diagram illustrating another modified example of the DVD playback device of the second embodiment.

FIG. 28 is a block diagram illustrating in detail a character display circuit according to a fourth embodiment.

FIG. 29 is an explanatory diagram showing a recording area of the V-RAM in FIG. 28;

[Explanation of symbols]

1 Disc 2 Reproduction means (drive device) 34 DVD encoding circuit (encoding 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 (constituting character information display means with start comparator 52, end comparator 53, buffer 55) 58 General display control data decoder (second decoding means) 59 Video display processor (constituting character information display means with CPU 60) 60 CPU

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 20/12 102 G11B 20/10 301

Claims (1)

(57) [Claims] 1. A disc 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 includes an audio pack including audio data, and a character related to the audio data. An audio pack including a character display pack including information and display time control data for controlling the display time thereof, and a management pack including information for managing the audio pack and the character display pack, and including the audio pack and the character display pack What is claimed is: 1. A disc reproducing apparatus for reproducing a disc in which a title set (ATS) is recorded and in which a video pack including video data and data for controlling the video data are not recorded, wherein: Reproducing means for reproducing the display pack and the management pack; First decoding the character display packs character information concerning the audio data
Decoding means for decoding display time control data from the character display pack reproduced by the reproducing means; and character information decoded by the first decoding means by the second decoding means. A disc information display device for displaying character information based on the decoded display time control data.