KR20060084833A - Method for managing information on recorded audio data and reproducing audio data on rewritable medium - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to audio data recording management and reproduction methods of a rewritable recording medium. By recording the recorded section information, the user can play only the representative audio when necessary, so that the user can quickly select a desired audio song from the many recorded audio.

Div, audio, play, representative, record, chain

Description

Method for managing and playing back audio data on rewritable recording media {Method for managing information on recorded audio data and reproducing audio data on rewritable medium}

1 shows a configuration of a general optical disk device,

2 schematically shows the structure of an audio track and its recording information recorded on a rewritable recording medium;

3 is a diagram schematically showing a relationship between program chain information referring to audio tracks and a playlist;

4 is a structural diagram showing program chain information in which representative audio section information is recorded in cell information according to the present invention;

FIG. 5 illustrates an example in which each audio track in which a representative audio section is selected and representative audio location information indicate a corresponding section;

6 is a structural diagram showing program chain information in which representative audio section information is recorded differently in cell information according to the present invention;

FIG. 7 illustrates another example of a form in which each audio track in which a representative audio section is selected and representative audio location information indicate a corresponding section;

8 illustrates an example in which a playlist is output on a screen when a user requests to play representative audio.

9, 11 and 13 structurally show program chain information in which representative audio section information is recorded differently in program information PGI according to the present invention.

10, 12, and 14 illustrate another example of a form in which each audio track in which a representative audio section is selected and the representative audio location information indicate the corresponding section.

※ Explanation of code for main part of drawing

1: Rewritable DVD 2: Optical pickup (P / U)

3: record signal processor 4: encoder (Encoder)

5: Sampler 6: System Control

7: Memory 8: Playback Signal Processing Unit

9: Decoder

The present invention relates to a method of selecting and managing representative contents of an audio song recorded on a rewritable recording medium, and reproducing it upon request so that it can be confirmed in advance.

Recording media such as CDs (Compact Disks) capable of recording and storing high quality digital audio data are the most widely used digital audio recording media. CD has been developed and released as a digital versatile disc (DVD), a high-density optical disc that can permanently record and store high-quality digital audio data, and can record and store high-quality video data or high-quality audio data for a long time. It is expected to be widely used. DVD types include a DVD-ROM for reproduction only, a DVD-R that can be recorded once, and a rewritable DVD-RAM or a DVD-RW.

Rewritable DVD, a large rewritable recording medium, is currently undergoing standardization on a recording format.

Fig. 1 shows the main configuration of a general optical disc apparatus for recording or reproducing video or audio data on a rewritable recording medium.

An optical disc apparatus of FIG. 1 includes: an optical pickup 2 for reading out a signal recorded on a rewritable recording medium such as a rewritable DVD 1, or for recording a data signal processed data stream on a rewritable recording medium; A reproduction signal processing unit (8) for processing reproduction signals of the signals read out from the optical pickup (2); A decoder (9) for decoding and outputting the reproduction signal; A sampler 5 for sampling and converting an analog signal input from the outside into a digital signal; An encoder (4) for encoding the converted and output digital signal by using an amplifier (MPEG) method, an LPCM method, an AC-3 method, or the like; A recording signal processor (3) for converting the encoded digital data into a signal of a form suitable for recording; A system controller (6) for controlling the operation of the constituent means in response to a user request; And a memory 7 for storing data necessary for the operation of the system controller.

When an analog audio signal is input to the optical disk device configured as described above, the sampler 5 samples the audio signal at a predetermined frequency, converts the audio signal into digital data, and then applies the encoder 4 to the encoder 4. ) Encodes the digital data in a format defined in the apparatus, for example, an amppack format, and provides the digital data to the recording signal processing section 3. Accordingly, the recording signal processing section 3 converts the encoded compressed audio data into a signal suitable for recording, and records it on the rewritable recording medium 1.

Audio data recorded on a rewritable recording medium is partitioned into one logical 'track' (hereinafter referred to as 'track') unit, which is different from the physical tracks spirally formed on the recording medium. It is distinguished. When an audio song provided through a microphone and a broadcast is recorded by one recording, it becomes one track.

All of the audio songs recorded on the rewritable recording medium, i.e. all the tracks, are managed as one track set, as shown in FIG. 2, in which a new track is additionally recorded or recorded in the track set. Some of the tracks that have been tracked may be deleted.

In addition, only a part of the track can be designated as a part track (PoT) by a user's editing operation or the like to play only that part. PL: Play List).

After recording or editing a track, cell information is generated as information for referring to all or a part of the track, and the cell information belongs to program chain information (PGCI) referred to at least one. do. The playlist lists reference program chain information appropriate to the user's selection by the program chain number.

Therefore, when a user selects any one playlist among a plurality of playlists selected or automatically generated at the time of recording, the system controller 6 searches for program chain information PGC corresponding to the selected playlist. The position information of all of the tracks designated by the cells in the program chain information or a part of the track is checked, and the track of the desired portion is searched by searching and reading the identified recording position. Playback output is possible.

However, since the recording medium is large, numerous audio tracks can be recorded. In the recording medium having such many audio tracks recorded, it is not easy to find a playlist indicating the audio track that the user wants to play. Therefore, there is an urgent need for the user to provide an efficient way to roughly check the audio songs included in each playlist.

The present invention has been created to solve the above problems, and records the representative audio for easily checking the contents of the audio track recorded on a large rewritable recording medium, and reproduces the audio data of the rewritable recording medium. Its purpose is to provide a management and regeneration method.

According to the present invention, a method of recording audio data of a rewritable recording medium according to the present invention selects a representative audio section for an audio track recorded at one time, and provides position information for searching for a recording position of the representative audio section. To generate and record the information in the cell information of the corresponding audio track.

According to the present invention, a method of reproducing audio data of a rewritable recording medium may include: an original program chain or a user associated with a selected reproduction list upon receiving a request for reproducing representative audio recorded on a rewritable recording medium. The cell information of the audio tracks or the partial audio tracks belonging to the definition program chain is sequentially searched for the representative audio section information recorded in the cell information, and then the audio data of the section is searched and played. It is characterized by performing as.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of recording management of representative audio of audio data of a rewritable recording medium and a reproduction method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

3 shows a structure of real time recording audio management information (RTR_AMGI) for an audio track recorded on a rewritable recording medium.

The real-time recorded audio management information includes an audio management information management table (AMGI_MAT: AMGI Management Table) and a playlist search pointer table (PL_SRPT: PL_Search Pointer Table), wherein the playlist search pointer table is a playlist search pointer. A field PL_SRPTI in which information about the table is recorded, and a field in which a plurality of play list pointers PL_SRP # 1, 2, ... are recorded.

The program chain number PGCN is recorded in the playlist search pointer PL_SRP. The program chain number designates a program chain having a structure as shown in FIG.

After the audio tune is recorded on the rewritable recording medium through the recording signal processing section 3, the system control section 6 generates one cell information as information on the track. This cell information has position information for the start and end of the track, which is recorded in the Audio Cell General Information field of FIG. The cells then belong to a particular program chain designated automatically or by user's selection as shown in FIG. 4, whereby one or more audio tracks are recorded so that a corresponding number of cells are generated and within the program chain, It may be recorded as Cell Information along with CI Search Pointer.

As shown in FIG. 4, one cell information includes audio cell general information A_C_GI including position information on a corresponding audio track, and a plurality of audio cell entry point information.

By the way, the audio cell entry point information records different information according to its type, and uses the cell entry point information area as information for storing the position of the representative audio for the corresponding audio track according to the present invention. That is, as shown in FIG. 4, by recording a value of '0001XXXX' (X is an arbitrary value) as a bit value in the type of entry point (EP_TY) field, as the additional information, the representative audio start presentation time (EP_RA_S_PTM: Indicates that information fields for Entry Point Representation Audio Start Presentation Time) and End Presentation Time (EP_RA_E_PTM) are included.

When the value of the entry point type field is '0110XXXX', the entry point type field is used for a general purpose of including a field for location information that can be randomly accessed.

Therefore, the system control unit 6, after the recording of the plurality of audio tracks is finished, if the position of the representative audio for each track is designated by editing, the information about the audio cell entry point of the cell information for the track is indicated. In the information field, the presentation time information (PTM) for the start and end positions of the specified position is recorded. Audio data for the representative audio may be selected from the recorded audio tracks, but if necessary, audio for only the representative audio may be recorded as the user's voice.

Figure 5 diagrammatically shows the results of recording an audio track and assigning a representative audio for each audio track, in accordance with the present invention. In the recording example of FIG. 5, the entry point type of FIG. 4, in which the start and end information of the representative audio section is recorded, is used.

In the example of FIG. 5, three audio tracks (one track corresponds to one audio object (AOB)) are recorded, and cell information for the three tracks is an original program chain generated at the time of recording. By writing to (ORG_PGC), it is connected with the original program chain. In FIG. 5, when the user designates a partial section UD_TK of track 3 (AOB 3) in the edit mode, the system controller 6 generates cell (Cell 4) information designating the designated partial section and the cell. An example of recording information in the user-defined program chain UD_PGC is also shown.

Also, for some sections of the track designated in the user-defined program chain, of course, the representative audio section is designated, showing that the start and end points indicating the section are recorded in the cell (Cell 4) belonging to the user-defined program chain. . In the example of FIG. 5, although the representative audio section for track 3 (AOB 3) and the representative audio section for the partial section UD_TK of track 3 specified by the user are the same, a partial section for the recorded track is shown. In a user-defined section that specifies the specific audio section different from the original section designation of which some sections are designated, of course.

As shown in FIG. 4, instead of a field for recording information about a start and an end of a section for a representative audio section designated by a user, an audio cell entry as a field for recording information indicating the start and duration of a representative audio section. It is also possible to configure a point information field. Figure 6 illustrates the format of a program chain according to this embodiment. The number of audio frames may be recorded as information representing the length of the representative audio section.

The recording example of the audio track of FIG. 7 shows a connection structure of information when the type of the audio cell entry point is used as the type shown in FIG. 6 instead of the type of FIG. 4. That is, the information indicating the length RA_DUR of the section instead of the information EP_RA_E_PTM indicating the end of the representative audio section of the arbitrary track is recorded in the cell information.

The following describes an audio track recorded as described above and a method of playing a representative audio section for the track.

When the rewritable recording medium 1 is inserted, the system control unit 6 reads out management information of the audio tracks recorded therein, and temporarily stores the management information in the memory 7 so that the user requests a representative audio reproduction. When the screen of FIG. 8 is selected to select a play list based on the real-time recording audio management information (RTR_AMGI) stored in the memory 7, the image display device connected to the optical disk device or the optical disk device are integrated. Output through a liquid crystal display and the like. At this time, a cursor for selection is created and displayed together.

If one playlist is selected while tracking the movement of the cursor on the screen by data input from an input device such as a remote controller, the program chain information is accessed by referring to the program chain number designated by the playlist.

Then, the cell information recorded in the program chain is confirmed.

If the user-selected playlist is the original program chain ORG_PGC of FIG. 5 or 7, three cell information corresponding to tracks 1, 2, and 3 (AOB 1,2,3) are checked. Then, the positional information about the representative audio sections RA_ENT, # 1, # 2, and # 3 recorded in the cell information, that is, the start and end, or the start and playback length, are sequentially checked.

Then, the system control unit 6 moves the optical pickup 2 to the identified position, reads the recorded audio data from the position, and outputs the audio through the reproduction signal processing unit 8 and the decoder 9. Perform an audio playback operation that outputs sound. This operation is performed until the end position of the designated representative audio section or as long as the playing time. When the reproduction of the representative audio section is completed, the representative audio section recorded in the next cell information is searched and read in the same manner, and then the audio is read. The negative output operation is repeated to the last cell.

If the playlist previously selected by the user is for the user-defined program chain, the representative audio section RA_ENT # 4 recorded in the cell information # 4 in the example of FIGS. 5 and 7 will be searched and played.

On the other hand, if the type of the audio cell entry pointer recorded in the next cell information is not '0001XXXX', which is a bit value representing the representative audio recording section, during the reproduction of the sequential representative audio section as described above, the corresponding cell information is corresponding. The representative audio for the audio track being skipped is considered skipped.

In the example of the recorded audio tracks of Figs. 5 and 7, in the user-defined program chain, only one section, which specifies a partial section of the audio track, is designated, but by specifying several sections for the recorded audio track, A plurality of cell information may be included in the user-defined program chain, and even in this case, the system control unit 6 searches for and reproduces representative audio sections defined in all cell information belonging to the user-defined program chain. do.

On the other hand, while the representative audio reproduction for the selected playlist is being performed as described above, when the previous representative audio search or the next representative audio search is requested from the user through an input device such as a remote controller, the system controller 6 displays the current cell. After checking the previous or next cell information of the information, the optical pickup 2 is moved to the representative audio section specified in the cell information to search for audio data of the section, and then the corresponding representative audio is reproduced.

In addition, when a track number is designated by the user, the system controller 6 searches for a representative audio section by referring to cell information corresponding to the track number in the currently playing program chain, and represents the representative audio corresponding to the audio track. To search and play.

Furthermore, it is possible to add a representative audio 'head search' function. This function is to replay from the beginning of the representative audio section currently being played if the 'head search' command occurs during the representative audio playback. That is, it is used when you want to listen to the representative audio of the song again.

The reproduction of various representative audio as described above is actually implemented through a user interface such as a remote controller. In addition, a shortcut button corresponding to 'representative audio' is provided to the remote controller, and when this button is pressed once, the representative audio 'on' command is made, and the sequential playback of the representative audio as described above is started. will be. If there is a program chain specified before the 'Representative Audio' on command, the representative audio of audio tracks belonging to the program chain is sequentially played back. If the program chain is not specified, the most recently recorded audio is played. Sequential playback of the representative audio for the original program chain containing the tracks is made.

In addition, if the button is pressed again, the representative audio 'off' command is issued. At this time, the playback of the representative audio is stopped, and the normal playback operation is performed from the beginning of the stopped audio song. That is, when a user finds a desired song and sequentially presses the 'representative audio' button while listening to the representative audio sequentially, the sequential playback of the representative audio is stopped, and the audio track belonging to the cell where the reproduction is being made, that is, You enter the playback mode of the song you want.

Meanwhile, another embodiment of the audio data recording management and reproducing method of the rewritable recording medium according to the present invention will be described in detail with reference to the accompanying drawings.

First, as illustrated in FIG. 9, one piece of program information PGI included in the program chain PGC information includes positional information of representative audio representing the corresponding audio track TK, that is, representative audio start. Representation audio information (REP_AUDI: Representation Audio Information) recorded including the presentation time EP_RA_S_PTM and the end presentation time EP_RA_E_PTM and the cell number information Cell_No corresponding to the representative audio may be selectively recorded. Identification information for identifying whether audio information is recorded or not, for example, a representative audio flag RA_Flag of 1 bit may be additionally recorded in the program type information PG_TY recorded in the program information.

That is, the program type information PG_TY includes one bit of information for indicating whether or not to protect the corresponding program and one bit of flag for indicating whether or not the representative audio information REP_AUDI is recorded. RA_Flag), and a recording size of 1 byte having a 6-bit reserved area.

The number of cell information corresponding to the program is recorded in the cell number information (C_Ns: Number of cells in this PG) included in the program information PGI.

Therefore, after the recording of the plurality of audio tracks is finished, the system control unit 6 designates the position of the representative audio for each track by editing the information about the number of cell information corresponding to the track. 1 bit for recording and managing the start and end reproduction time information of the representative audio entry point as the representative audio information (REP_AUDI), which is selectively included and recorded in the corresponding program information (PGI), and inform the recording of the representative audio information. Identification information RA_Flag is recorded in the program type information PG_TY.

In the example of FIG. 10, three audio tracks are recorded, and the cell information for the three tracks is recorded in the original program chain information ORG_PGC generated at the time of recording, so that the program information corresponding to the cell information is recorded. It is connected with the original program chain information (OGC_PGC) together with the cell information. 10 illustrates an example in which the first program information corresponds to the first cell information and the second cell information, and the second program information corresponds to the third cell information.

Then, when the user designates a partial section UD_TK of the track 3 (AOB 3) in the edit mode, the system control unit 6 generates cell (Cell 4) information designating the designated partial section, and the cell ( An example of recording program information corresponding to Cell 4) information in the user-defined program chain UD_PGC is also shown.

Also, for some sections of the track specified in the user-defined program chain, of course, the representative audio section is designated so that start and end points indicating the section are recorded in the program information of the cell (Cell 4) belonging to the user-defined program chain. Is showing. In the example of FIG. 10, the representative audio section for track 3 (AOB 3) and the representative audio section for the partial section UD_TK of track 3 specified by the user are the same, but some sections for the recorded track are shown. In a user-defined section that specifies the specific audio section different from the original section designation of which some sections are designated, of course.

In addition, in the case of the first program information corresponding to each of the first cell information Cell1 and the second cell information Cell2 as described above, as described above with reference to FIG. 9, recording is included in the corresponding program information PGI1. The information indicating that the number of cells is two is included in the number of information cells C_Ns to be recorded, and as shown in FIG. 10, and as shown in FIG. When a section is designated, the number of the first cell information is selectively recorded in the cell number information Cell_No recorded in the representative audio information REPI_AUDI of the program information PGI1.

Meanwhile, FIG. 11 illustrates an embodiment of recording information indicating the start and duration of the representative audio section instead of recording information about the start and end of the section for the representative audio section designated by the user. FIG. 13 illustrates an embodiment in which only information indicating the start of a representative audio section is recorded, and the number of audio frames may be recorded as information indicating the length of the representative audio section.

Hereinafter, the audio track recorded as described above and the reproduction method of the representative audio section for the track will be described.

When the rewritable recording medium 1 is inserted, the system control unit 6 reads out management information of the audio tracks recorded therein, and temporarily stores the management information in the memory 7 so that the user requests a representative audio reproduction. When a display for selecting a play list, for example, the screen of FIG. 8 is configured based on the real-time recording audio management information (RTR_AMGI) stored in the memory 7, the image display device connected to the optical disk device. Or, it outputs through the liquid crystal display etc. which were integrally provided in the optical disk apparatus.

At this time, a cursor for selecting a playlist is displayed on the screen together, and if one playlist is selected while tracking the movement of the cursor on the screen by data input from an input device such as a remote controller, the playlist is displayed. Access the program chain information by referring to the program chain number designated by.

Then, the programs recorded in the program chain are checked. If the playlist selected by the user is the original program chain information (ORG_PGC) of FIGS. 9 to 14, the tracks 1, 2, and 3 (AOB 1,2). 2, program information PGI1 and PGI2 corresponding to 3) are checked.

Thereafter, the representative audio flag RA_Flag of one bit among the program type information PG_TY recorded and included in the corresponding program information PGI is checked. When the value is '1b', the representative audio information REP_AUDI is recorded. And the position information about the cell number information (Cell_No) recorded as the representative audio information and the representative audio sections RA_ENT, # 1, # 2, # 3, i.e., start and end, or start and playback length. You will then see the information about the beginning.

Then, the system control unit 6 moves the optical pickup 2 to the identified position, reads the recorded audio data from the position, and outputs the audio sound through the reproduction signal processing unit 8 and the decoder 9. Perform audio playback. This operation is performed until the end position of the designated representative audio section or only for a preset time. When only the information on the start of the representative audio is recorded in the representative audio information, the preset Playback will only take place over time.

After the reproduction of the representative audio section is completed, the operation of searching and reading the representative audio section recorded in the next program information in the same manner and outputting the audio sound is repeated until the final program information.

If the playlist previously selected by the user is for a user-defined program chain, the representative audio section RA_ENT # 3 recorded in the third program information PGI 3 in the example of FIGS. 9 to 14 will be searched and played. .

On the other hand, when the representative audio flag value recorded in the next program type information is '0b' in the sequential playback of the representative audio section as described above, that is, when the representative audio information REP_AUDI is not recorded, It is assumed that the representative audio for the audio track corresponding to the program is not recorded and is skipped.

9 to 14, the user-defined program chain designates a partial section of the audio track. Although only one section is designated, multiple cell information can be generated by designating several sections for the recorded audio track, and program information corresponding to the cell information may be included in the user-defined program chain. In this case, the system control unit 6 reproduces while sequentially searching for the representative audio section specified in all the program information belonging to the user-defined program chain.

On the other hand, if the representative audio search for the previous representative audio search or the next representative audio search is requested from the user through an input device such as a remote controller while the representative audio reproduction for the selected playlist is performed as described above, the system control unit 6 displays the current program. After checking the previous or next program information of the information, the optical pickup 2 is moved to the representative audio section designated in the program information, and the audio data of the section is searched for, and the corresponding representative audio is reproduced.

In addition, when a track number is designated by the user, the system controller 6 searches for a representative audio section by referring to program information corresponding to the track number in the currently playing program chain, and represents the representative audio corresponding to the audio track. To search and play.

Furthermore, it is possible to add a representative audio 'head search' function. This function is used to replay from the beginning of the representative audio section that is currently being played, if there is a 'head search' command during the representative audio playback.

And the reproduction of the various representative audio as mentioned above is actually implemented through a user interface, such as a remote controller. In addition, a shortcut button corresponding to 'representative audio' is provided to the remote controller, and when this button is pressed once, the representative audio 'on' command is made, and the sequential playback of the representative audio as described above is started. will be. If there is a program chain specified before the 'Representative Audio' on command, the representative audio of audio tracks belonging to the program chain is sequentially played back. If the program chain is not specified, the most recently recorded audio is played. Sequential playback of the representative audio for the original program chain containing the tracks is made.

In addition, if the button is pressed again, the representative audio 'off' command is issued. At this time, the playback of the representative audio is stopped, and the normal playback operation is performed from the beginning of the stopped audio song. That is, when the user finds a desired song and sequentially presses the 'representative audio' button while listening to the representative audio, the sequential playback of the representative audio is stopped and the audio track belonging to the program being played at that time, namely You enter the playback mode of the song you want.

Above, preferred embodiments of the present invention described above are disclosed for the purpose of illustration, those skilled in the art will be able to change, replace or add through the spirit and scope of the present invention disclosed in the appended claims.

The audio data recording management and reproducing method of the rewritable recording medium according to the present invention, as described above, can quickly and conveniently find an audio song desired by a user when a large number of songs are recorded on a large rewritable recording medium. To be.

Claims (4)

Recording control information related to the representative portion of the digital data and identification information indicating that the control information exists as management information; And when the identification information indicates that the control information does not exist, the control information does not exist. The data record management method according to claim 1, wherein the control information includes position information of the representative portion. The data record management method according to claim 2, wherein the position information is information indicating a start position of the representative portion. 3. The data recording management method according to claim 2, wherein the control information includes information indicating the length of the representative portion.

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