JP2003249061A - Audio reproducing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the playability of DVD-Audio. <P>SOLUTION: An audio reproducing method for a storage medium where many audio packs are recorded for each track and text information packs are recorded discretely between the audio packs comprises: storing the text information in a memory so that the audio data corresponding to the text information included in a text information pack can be specified; displaying text information of a specified track; and starting reproducing audio data from the audio pack corresponding to a specified text information part when the specified text information part is indicated. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio reproducing method for a storage medium, and more particularly to a memory in which a large number of audio packs are recorded for each track and text information packs are discretely recorded between the audio packs. The present invention relates to an audio reproducing method for a medium.

[0002]

2. Description of the Related Art Currently, the DVD-Audio standard includes information such as "still image information", "moving image information", and "text information".
Among them, "text information" includes centralized recording type "static text information" and real-time type "dynamic text information (real-time information)". This "dynamic text information" is recorded in the audio data recording area, and the text information can be read and displayed in synchronization with audio reproduction. Therefore, "dynamic text information"
Is the lyrics of the music, the lyrics can be displayed on the display device while playing the music.

[0003]

Conventionally, the dynamic text information, for example, lyrics has only been read and displayed in synchronization with the reproduction of audio data. From the above, it is an object of the present invention to specify a reproduction position by using dynamic text information and enable the reproduction to be started from the position. Another object of the present invention is to improve the playability of DVD-Audio.

[0004]

The present invention is an audio reproducing method for a storage medium in which a large number of audio packs are recorded for each track and text information packs are discretely recorded between the audio packs. When the text information is stored in the memory so that the audio pack including the audio data corresponding to the text information included in the information pack can be specified, the text information of a predetermined track is displayed, and the predetermined text information portion is instructed , Reproduction of audio data is started from the audio pack corresponding to the text information portion, or repeated reproduction is performed. The text information is, for example, the lyrics of the music piece.

With the above arrangement, it is possible to specify the reproduction position by using the dynamic text information, start the reproduction from the position, or repeat the reproduction. Further, when the text information portion is designated at two places, the audio data between them can be reproduced or repeatedly reproduced. As a result, the playability of DVD-Audio can be improved.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION (A) Configuration of a DVD player FIG. 1 is a configuration diagram of a DVD player. 10 is a DVD disc mounted on a turntable, 11 is a disc changer, and 12 is a peripheral speed of the turntable. A spindle motor that rotates at a constant speed, 14 an optical pickup that reads data from a DVD disc, 16 a feed motor that feeds the pickup in the disc radial direction, 18 a servo control unit that performs tracking servo control, focus servo control, and constant peripheral speed control, 22 is an RF amplifier that amplifies the signal read by the pickup, 2
4 is a digital signal processing unit that performs digital signal processing (demodulation, error correction, descrambling, etc.) on the RF signal and outputs it as a data stream, 26 is RAM, 30 is an input data stream as an audio stream, a video stream, a sub stream It is a stream separation unit that separates a picture stream.

Reference numeral 32 is an audio decoder for converting compressed audio data into PCM audio data, 34 is RAM, 36 is a video decoder for converting compressed video data into video data, 38 is RAM, 4
0 is a sub-picture decoder that converts compressed sub-picture data into sub-picture video data, 42 is a RAM, 44 is a video processor that performs various video signal processes, 46 is a character image generation unit that generates character images, and 47 is a display device. , 48 is a DA converter, 49 is a speaker, 58 is an operation unit, and 60 is a system controller.

The system controller 60 performs various kinds of control, but is reproduction control using dynamic text information (real-time information) as control relating to the present invention. That is,
Dynamic text information (for example, song lyrics) recorded in the audio data storage area of the DVD-Audio is collected and stored in the memory 60a, and the lyrics are displayed on the display device 47 as shown in FIG. It is displayed and the reproduction control from the instructed lyrics portion is performed.

(B) Logical Data Structure of DVD-Audio Disc FIG. 3 is an explanatory diagram of the logical data structure of the DVD-Audio disc. DVD-Audio discs are DVD volume zones, DVD audio zones for recording audio content,
DVD video zone for recording video content, DVD
It is composed of the others zone, and the lead-in area and the lead-out area are provided at the front and back. In the DVD audio zone, simple audio manager SAMG, audio manager AMG, audio still video set ASVS, and one or more (up to 99) audio title sets ATS are recorded.

Since the DVD-Audio has a large capacity, it is possible to record many tracks corresponding to a plurality of CD albums. Therefore, in order to improve accessibility, a new access unit Group is defined by grouping tracks (songs) to be continuously played back. This Gro
Up is a continuously reproducible logical unit configured by sequentially connecting one or more audio titles ATT. The audio title set ATS corresponds to one group, and defines an audio-only title AOTT defined by the navigation data and audio object (AOB) in the ATS or the audio data of the navigation data and video object (VOB) in the ATS. It is a logical unit. That is, the audio title set ATS consists of audio title set information ATSI, an audio object set for AOTT (AOTT-AOBS) that is a collection of audio objects for AOTT (AOTT-AOB), and ATSI backup ATSI (Back Up). Composed of.

Audio object set AOTT for AOTT
-AOBS is a collection of multiple AOTT-AOBs (audio objects for AOTT) as shown in Fig. 4, and one AOTT-AOB is one.
Corresponds to the truck. AOTT-AOB is composed of many audio cells ATS-C, each audio cell ATS-C is composed of multiple audio packs A-PCK which are audio data, and real-time information (dynamic text information) is put in place. Real-time pack RTI-PCK is inserted. The real-time information is, for example, lyrics, and a real-time pack RTI-PCK including the lyrics portion is inserted in an appropriate position in the audio cell ATS-C corresponding to the lyrics portion.

One pack is 2048 bytes, and the first pack of the audio object AOTT-AOB for AOTT is shown in FIG. 5 (a).
5B, and the other packs have the structure shown in FIG. 5B. The first pack contains a 14-byte pack header, an 18-byte system header, 2016 bytes of audio data or real-time information. Packs other than the first pack are 14-byte pack header,
It contains 2034 bytes of audio data or real-time information.

The system header includes a system start code, header length and the like, and the pack header includes a pack start code, SCR (System Clock Reference) and the like.
Therefore, whether or not it is the first pack can be identified by detecting the system start code, and the packs can be separated from each other by detecting the pack start code. Moreover, since the SCR has a time unique to the pack, the pack can be specified based on the SCR.

As described above, since each pack can be separated and the SCR having a unique time is included in the pack header, the real-time information (lyrics) read during reproduction of a predetermined track is recorded from the beginning. Pack number or S
Corresponding to CR, it is stored in the memory 60a as shown in FIG. 6 (a). If the audio cell ATS-C is composed of a fixed number of packs, the audio cell ATS-C can be separated by counting the number of packs, as shown in FIG. 6 (b). Real time information (lyrics) of the real time pack is stored in association with the audio cell ATS-C including the real time pack RTI-PCK.

(C) Reproduction control FIG. 7 is a processing flow of the reproduction control of the present invention. In the case where a predetermined track (song) is reproduced, a desired lyrics portion is designated and reproduction is performed from the lyrics portion. explain. Also, an audio cell ATS that includes the real-time pack RTI-PCK
-C is identifiable. The system controller 60 stores the lyrics of the real-time pack RTI-PCK read during the reproduction of a predetermined track in the memory 60a in association with the number of the audio cell ATS-C to which the real-time pack RTI-PCK belongs (Fig. 6 ( b), step 101). The album name, artist name, and track number of the track are also saved at the same time.

Next, when the designated lyrics reproduction of a predetermined track is instructed from the operation unit 58, the system controller 60 reads the album name, artist name, track number, and lyrics of the instructed track from the memory 60a and the character image generation unit. Enter in 46. The character image generation unit 46 generates a character image composed of the input album name, artist name, track number, and lyrics, and the video processor 44
Display on the display device 47 via (step 10
2). After that, the system controller 60 waits until the lyrics portion, that is, the reproduction place is selected (step 103), and if the user indicates the lyrics portion desired to be reproduced with the cursor CSR as shown in FIG. Wait for
(Step 104). The playback type is one-time playback or repeated playback.

When the user inputs the reproduction type, the system controller 60 obtains the number of the audio cell ATS-C corresponding to the lyrics designated in step 103 from the memory 60a. Then, the servo control unit 18 is controlled to control the optical pickup 1
4 is the first audio pack A-PC of the audio cell ATS-C
Position to K. Then, the audio pack A-PCK
Subsequent audio packs are read out and reproduced according to the instructed reproduction type (step 105).

The above is the case where the audio cell ATS-C including the real-time pack RTI-PCK can be identified, but if the audio cell ATS-C cannot be identified,
Since the information of 6 (a) is stored in the memory 60a, the pack number of the real-time information pack RTI-PCK is obtained from the memory 60a, and the optical pickup 14 is positioned in the audio pack A-PCK which is some number before this number. , The following audio packs are read out and reproduced according to the designated reproduction type. Alternatively, the SCR of the real-time information pack RTI-PCK is obtained from the memory 60a, the optical pickup 14 is positioned on the audio pack A-PCK having an SCR value close to the SCR, the subsequent audio packs are read out, and according to the instructed reproduction type. Play back.

(E) Modification In the above, the present invention is a case of storing lyrics in a DVD-Audio together with audio data (music).
It can also be applied to the case where both (conversation) and language texts are stored. In the above description, the lyric part is designated at one place, but it is also possible to designate two places to reproduce the audio data between them or to repeat the reproduction. In the above, a case has been described in which, after reproducing a predetermined track (song), a desired lyric portion of the track is designated and reproduction is performed from the lyric portion. However, the present invention is not limited to the reproduced track. For example, the tracks are read ahead and the real-time information (lyrics) of the real-time pack is stored in the memory 60a, and the lyrics of the instructed track are displayed.

[0020]

As described above, according to the present invention, it is possible to specify the reproduction position by using the text information, start the reproduction from the position, or repeat the reproduction. You can also specify the text information part in two places and play the audio data between them, or repeat it.
The playability of VD-Audio can be improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a DVD player.

FIG. 2 is a display example of dynamic text information (eg, lyrics of a song).

FIG. 3 is an explanatory diagram of a logical data structure of a DVD-Audio disc.

[Figure 4] Audio object set AOTT-AOB for AOTT
It is a block diagram of S.

FIG. 5 is a pack configuration diagram of an audio object for AOTT.

FIG. 6 is an example of lyrics storage.

FIG. 7 is a processing flow of reproduction control according to the present invention.

[Explanation of symbols]

10 DVD disc 24 Digital signal processor 32 audio decoder 47 display device 60 system controller 60a memory

Claims (2)

[Claims] 1. An audio reproducing method for a storage medium in which a large number of audio packs are recorded for each track and the text information packs are discretely recorded between the audio packs, in accordance with the text information contained in the text information packs. The text information is stored in the memory so that the audio pack containing the audio data can be identified, the text information of the predetermined track is displayed, and when the predetermined text information portion is designated, the audio corresponding to the text information portion is displayed. A method for reproducing a storage medium, which starts reproducing audio data from a pack. 2. The method of reproducing a storage medium according to claim 1, wherein the text information is lyrics of a music piece.