JP3684125B2 - How to play, record, and edit display information synchronized with audio information - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention records text information that can be displayed in synchronization with voice information (such as a song lyrics card) on an information storage medium together with the voice information, and enables playback and editing processing. The present invention relates to a method, a reproducing method, an editing method, and a data structure recorded on an information storage medium.
[0002]
[Prior art]
There is a DVD Audio standard as a method for recording text information that can be displayed in synchronization with audio information, such as a song lyrics card, on an information storage medium together with the audio information.
[0003]
According to this standard, audio information is recorded on an information storage medium in a packet (Audio Pack) format, and text information displayed in synchronization with the audio information is also converted into a packet format (Real-Time Information Pack). Audio information packets (Audio Pack) are mixed and recorded on the information storage medium. At the time of reproduction, the voice information and the text information are synchronized and displayed using a PTS (Presentation Time Stamp) in a packet header recorded together with the packet.
[0004]
[Problems to be solved by the invention]
The DVD Audio standard is a standard for reproduction-only information storage media, and therefore does not support editing processing by the user. For example, after copying information in which audio information and text information mixedly recorded in packet format based on the above DVD Audio standard are copied onto a rewritable information storage medium, editing such as partial erasure and division based on the audio information In some cases, the synchronization relationship between the voice information and the text information is partially broken. As a result, there is a risk that text information synchronized with the audio information is not displayed immediately after the start of reproduction, immediately before the end of reproduction, or at the switching point after editing such as partial erasure or division based on the audio information.
[0005]
The present invention is for solving the above-described problems, and an object of the present invention is to copy audio information displayed in synchronization with text information recorded in the DVD Audio standard onto a rewritable information storage medium. At the same time, it provides a data structure or information storage medium recorded based on the data structure that keeps the synchronization relationship between the voice information and text information unchanged even after editing such as partial deletion or division by the user. Alternatively, it is to provide a recording method, a reproducing method, and an editing method for ensuring the above object.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an information storage medium. The audio information is stored and recorded in an audio pack sequence, the display information is stored and recorded in a real-time information pack sequence, and the audio information and the display information are reproduced and output in synchronization. Yes, And, in the recording area different from the recording location of the audio information and display information on the information storage medium, management information related to the audio information and display information is recorded, The audio information includes a plurality of audio objects, and the audio object and the display information corresponding to the audio object are reproduced and output in synchronization with each other. In the management information recording area, General information for managing audio information in units of the audio object; and audio object entry information. The general information includes modified recording time information, a start address and an end address of the audio information, and a start. Further, the object entry information includes size information for each corresponding audio object, further offset information for obtaining an address of text information corresponding to the audio object unit, and the object entry information. Each audio pack supports audio information It is based on a structure in which synchronization information related to display time for displaying the display information in synchronization is described.
[0007]
When editing such as partial erasure or division, division / partial erasure processing is performed based on the packet recording position of text information displayed at the same time as the voice information at the specified boundary time.
[0008]
2. When copying onto a rewritable information storage medium, an audio information file (AR_AUDIO.ARO 221 in FIG. 14) composed only of audio information packets and a real-time text information file (FIG. 14) composed only of text information packets. AR_RT_TEXT.ARO 222), and recording time management information related to text information is recorded in the management information recording area in order to ensure a synchronization relationship between them (corresponding to FIGS. 14 to 20).
[0009]
Only the audio information file is edited, and the time information or the common ID information when the audio information and the text information are recorded for the first time so that the synchronization relationship between the two can be restored even if the synchronization relationship with the text information is lost. Record.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. In the DVD Audio standard, audio information is packed and recorded in an Audio Pack (A_PCK), and text information reproduced in synchronization with the audio information is recorded in a mixed format in the Real Time Information Pack (RTI_PCK) format.
[0011]
In the first invention means of the present invention, the audio-related information recorded based on the DVD Audio standard is recorded on an rewritable information storage medium as it is (ST01). The recording format of each information recorded on the information storage medium is shown in FIG. The minimum rewritable unit in the rewritable information storage medium is 2048 bytes. Each 2048 byte constitutes a Pack, and a Pack Header 501 is arranged at the head of each Pack. In this Pack header 501, an SCR (System Clock Reference) value 512 for setting a system clock value of the information recording / reproducing apparatus is recorded.
[0012]
This embodiment has a structure in which only one packet is recorded in one pack, and is reproduced in synchronization with the audio information or the recording position of “various object data 505” shown in FIG. 7B. Text information is recorded. A Packet Header 503 and a sub_stream_id 504 are recorded at the head of each Packet, and a System Header 502 is arranged between them and the Pack Header 501.
[0013]
The type of information recorded in the recording area of various object data 505 (whether it is audio information or text information) is specified by the information contents of stream_id 522 and sub_stream_id 504. The display timing of each Object data 505 is set by a PTS (Presentation Time Stamp) value 525, and the PTS value 525 can be used to synchronize display between voice information and text information.
[0014]
In the embodiment shown in FIGS. 1A and 1B, text information “ANDO” is recorded in RTI_PCK # 1 and displayed at 4:00, and “San” says. Text information is recorded in RTI_PCK # 2 and is displayed at 4:03. As a management unit for audio information, it has a minimum unit (Audio Object Entry) of audio information composed of one or more Audio Packs (A_PCK).
[0015]
In the embodiment shown in FIGS. 1 and 2, the audio information display time at the boundary position of the minimum unit (Audio Object Entry) and the switching time of the text information are set to coincide with each other. The data structure in the management information recording area related to the audio information related information and the recording format of the audio information related information (Object information) are described in “Part 3 VIDEO RECORDING DVD Specifications for Rewritable / Re-” issued in September 1999 by the DVD Forum. It conforms to “recordable Discs”.
[0016]
That is, as shown in FIG. 5, all the audio information related information (Object information) recorded in the information storage medium is collectively recorded in the AR_AUDIO.ARO 221 file, and the management information in the file is VR_MANGR.IFO 211 file. And its backup file VR_MANGR.BUP 215 are recorded together. The data structures in the VR_MANGR.IFO 211 file and the VR_MANGR.BUP 215 file are as shown in FIG.
[0017]
The data structure shown in FIG. 4 is described in detail in “Part 3 VIDEO RECORDING DVD Specifications for Rewritable / Re-recordable Discs” issued in September 1999 by the DVD Forum, so the explanation is omitted here. To do.
[0018]
In the embodiment of the present invention, related information related to audio-related information is collectively recorded in the Audio AV File Information Table 143 shown in FIG. An audio object (AOB) is formed for each recording unit, and audio object information # 1 166 to #j 167 is separately recorded for each AOB. The data structure in one Audio Object Information #n is shown in FIG.
[0019]
As described above, the audio information has a management unit called Audio Object Entry, and data sizes (Data Size) 311 to 320 and display times (Playback Time) 331 to 340 for each Audio Object Entry are recorded. There are cases where multiple types of text information such as “German”, “Japanese translation”, “English expression”, etc. are attached to the voice information for the lyrics of the song.
[0020]
In FIG. 1D, the number of types of text information attached to the audio information is recorded in the number of types 307 of Real-Time Text. For example, when “g” is specified as the number of types 307 of the Real-Time Text set in FIG. 1D, the audio information at the head position of each Audio Object Entry is displayed at the same time. “G” address offsets 351 to 360 of RT_Text_Pack indicating the relative address value in which the Real-Time Information Pack (RTI_PCK) in which the text information is recorded are recorded are recorded for each Audio Object Entry.
[0021]
FIG. 8 shows the structure of the information recording / reproducing apparatus according to the present invention. In FIG. 8, there are three STCs (System Time Clock) that are used as reference clock counters during playback and display, and the audio information, text information, and still image information with different PTSs can be reproduced simultaneously. There is. A method of creating information shown in FIG. 1D during recording will be described with reference to FIG.
[0022]
As shown in FIG. 9, the information recorded on the information storage medium is reproduced, and the information of FIG. 1D is created from the stream_id 522, the PTS value 525, and the recording position address information of each pack.
[0023]
In the embodiment of FIG. 1, the Audio Object Entry is divided in accordance with the display switching timing of the text information. However, as another embodiment of the present invention, the Audio Object Entry may be divided at a specific reproduction time interval. I can do it.
[0024]
The recording method at that time is shown in FIG. In this case, there is a case where the text information is being displayed at the audio information playback time at the start position of the Audio Object Entry. As shown in ST14 of FIG. 10, the Real-Time Information Pack position having the PTS immediately before the audio information reproduction time at the start position of each Audio Object Entry is searched for and recorded as TR_Text_Pack Address Offsets 351 to 354. .
[0025]
FIG. 11 shows a method for reproducing audio related information from the information storage medium having the management information of the embodiment shown in FIG. When an audio object (AOB) number to be reproduced and a reproduction range are designated by time information (ST21), an access start address is calculated using the management information (ST22). At this time, the access address of the Audio Pack (A_PCK) and the access address of the Real Time Information Pack (RTI_PCK) are calculated, and the younger address is determined as the calculated address.
[0026]
For example, when accessing from 4:03, the address of each pack displayed at this time is “P + Q” and “P + Q + 1” according to FIG. You can access "". Also, if you want to start playback from 4:10, the Audio Pack (A_PCK) address displayed at 4:10 is “P + T” and the Real Time Information Pack (RTI_PCK) displayed at the same time is recorded. Since the address that precedes “P + S + 2”, the text information of RTI_PCK # 4 cannot be displayed when accessed from “P + T”. Therefore, the access destination address must be set to “P + S + 2” as the younger address.
[0027]
In the embodiment of the present invention, in editing processing such as partial deletion and division / sorting of audio-related information, basically, an audio object (AOB) is divided for management and then deleted from the corresponding AOB file after division. Processes and sorts the files. A partial erasing method according to the embodiment of the present invention will be described with reference to FIGS.
[0028]
As an example, a method of dividing the AOB # n shown in FIG. 1 into three and deleting the first half and the second half will be described. A partial erase range is designated by the user by time information (ST31). The disk drive unit 409 reproduces the VR_MANGR.IFO 211 file recorded on the information storage medium 400 (ST32), and rewrites the management information contents temporarily stored in the work RAM in ST33 to ST39.
[0029]
In the AOB #n Modified Recording time 302 in the Audio Object General Information 170 in FIG. 1D, only the recording start time and minute are described because of the space on the paper, but in the embodiment of the present invention, recording is performed. The year and date of recording are recorded in the same place. Further, in order to clarify the relationship before and after editing, the ID number 301 for each AOB is recorded. However, the recording number 301 for each AOB within the same day recording date may be recorded in this column.
[0030]
As shown in FIG. 2 (a), for example, when a part recorded before the playback time 4:05 is partially erased, the playback start time after the partial erase is 4:05. Like # m + 1, AOB # m + 1's Modified Recording time 382 is changed to 4:05 (ST33 in FIG. 12).
[0031]
As can be seen from FIG. 2A, since the time difference from the recording start time is 5 minutes at the beginning of this time, the Original Recording time Difference 383 of Audio Object Information # m + 1 in FIG. 3 is 5 minutes. For example, if the first half of 5 minutes is further deleted from AOB (Audio Object) # m + 1 created as a result of editing this time, this Modified Recording time 382 is changed to 14:10 and Original Recording time Difference 383 is further 5 minutes. Adds to 10 minutes. As a result, the first recording start time remains 14:00.
[0032]
Therefore, from the Modified Recording time 382 and Original Recording time Difference 383, the date and time of the first recording start of AOB # m + 1 and the recording start time are uniquely determined, and this time information remains unchanged even if the editing is repeated many times. Be drunk.
[0033]
The playback start time of AOB # m + 1 after partial erasure is 4:05, and the address at which Audio Pack # R-2 displayed at this playback time is recorded is “P + R”. However, the address of RTI_PCK # 2 in which the text information being reproduced at 4:05 is recorded is recorded at the forward address position by the difference of “RQ-1” (ST34 in FIG. 12). ).
[0034]
Therefore, since this information needs to remain even after partial erasure, the start address 384 of AOB # m + 1 is the address “P + Q + 1” where this Real-Time Information Pack # 2 is recorded as shown in FIG. (ST35 in FIG. 12). The address difference in which Audio Pack # R-2 to be reproduced first in AOB # m + 1 with respect to the head address of AOB # m + 1 is recorded in Start Address Offset 386, and becomes “RQ-1” in FIG. 3 (ST36). ).
[0035]
This value is identical in absolute value with the value of Address Offsett 357 of RT_Text_Pack of Audio Object Entry # 1 176. RT_Text_Pack's Address Offset 357 represents the recording position direction of RT_Text_Pack # 2 in terms of polarity with respect to the Audio Pack position at the head of Audio Object Entry # 1 176. In the embodiment of FIG. 2 (a), RT_Text_Pack # 2 is set in front of Audio Pack # R-2 so that it is “negative”.
[0036]
Further, unnecessary portions of Audio Object Entry # 1 171 to # 4174 before partial erasure shown in FIG. 1D are deleted and part of them are rewritten to complete Audio Object Entry # 1 176 to # 3 178 shown in FIG. (ST38).
[0037]
When specific text information is deleted in the embodiment of the present invention, as shown in ST53 of FIG. 13, Object data 505 in the Real-Time Information Pack in which the text information to be deleted is recorded (FIG. 7 ( b)) Only the part is rewritten with the information of Object data 505 in the immediately preceding Real-Time Information Pack.
[0038]
Another embodiment of the present invention is the second means of the present invention, “2. An audio information file composed only of audio information packets when copying onto a rewritable information storage medium (FIG. 14 AR_AUDIO.ARO 221) and a real-time text information file consisting of only text information packets (AR_RT_TEXT.ARO 222 in FIG. 14) and recording time for text information in order to ensure synchronization between the two. “Management information is recorded in the management information recording area (corresponding to FIGS. 14 to 20)” will be described below.
[0039]
As shown in FIG. 16, when copying Object information (FIG. 16C), which is audio related information of DVD Audio, to a rewritable information storage medium, the stream_id 522 shown in FIG. 7C is used. Identify Audio Pack or Real-Time Information Pack and record each in a separate file. As a result, according to this embodiment, an AR_RT_TEXT.ARO 222 file in which only text information is collected as compared with the file structure shown in FIG. 5 is added.
[0040]
Furthermore, according to this embodiment, the data structure of the management information is added with Real-Time Text AV File Information 159 as shown in FIG. 15 as compared with FIG. 4, and the time management information therein is shown in FIG. As shown, a series of Real-Time Text Object Entry # 1 191 to #h 198 information is added.
[0041]
As shown in FIG. 17C, in this embodiment, one or more Real-Time Packs in which text information is recorded are collected and used as Real-Time Text Object Entry # 1 191 to # 3 193 as management units. The display time and data size for each Real-Time Text Object Entry # 1 191 to # 3 193 are managed (FIG. 17 (d)). As shown in FIG. 18, the recording method based on this embodiment is divided into recording an audio pack on an information storage medium (ST61) and recording a real-time information pack (ST62).
[0042]
In this embodiment, information recorded at different positions in the AR_AUDIO.ARO 221 file and the AR_RT_TEXT.ARO 222 file must be sequentially played back, and voice and text need to be played back simultaneously. Accordingly, as shown in FIG. 19, a part of the information in the AR_RT_TEXT.ARO 222 file is reproduced first, transferred to the RT_Text decoding unit 429 (FIG. 8) (ST75), and simultaneously displayed while reproducing the audio pack (ST75). ST79) is a major feature of this embodiment.
[0043]
In the case of this embodiment, only the AR_AUDIO.ARO 221 file may be partially erased by an information recording / reproducing apparatus that only performs recording, playback, and editing of the Audio Pack, and the synchronization relationship with the AR_RT_TEXT.ARO 222 file may be lost. . In this case, it is necessary to restore this synchronization relationship with an information recording / reproducing apparatus having a function of displaying text information.
[0044]
The difficulty of repairing the synchronization relationship when using compressed audio information will be described with reference to FIG. Assume that AOB # 1 is first recorded at 14:00 on the same day (recording number 301 = 1), and then recording is started at 14:30 as the next recording (recording number 301 = 2).
[0045]
The Modified Recording times at this time are 14:00 and 14:30, respectively. However, when AOB # 1 is compressed and recorded, the playback time may be much longer than the time required for recording. Therefore, when AOB # 1 is continuously reproduced, there is a case where the first half is partially erased at the boundary of the reproduction conversion time 14:45. The modified recording time after editing is 14:45, which is later than the modified recording time 14:30 of AOB # 2.
[0046]
As described above, with only the information of the AOB number and Modified Recording time, it is difficult to restore this synchronization relationship by an information recording / reproducing apparatus having a function of displaying text information after only the AR_AUDIO.ARO 221 file is partially erased. .
[0047]
Therefore, in the embodiment of the present invention, the recording start date and time information that has the ID number or the recording number 301 within the same recording date and the information of the Original Recording time Difference 303 and that is kept unchanged even if the editing is performed many times. As a standard, the synchronization relationship between the information in the AR_AUDIO.ARO 221 file and the information in the AR_RT_TEXT.ARO 222 file can be repaired.
[0048]
A specific relationship repair method is shown in FIG. As shown in ST94 of FIG. 20, the Audio Object that matches the first recorded time is searched, the management information content is changed according to the editing status of the Audio Object (ST96), and the unnecessary part of AR_RT_TEXT.ARO 222 is deleted. To do.
[0049]
【The invention's effect】
As described above, the effects of the present invention are summarized as follows.
[0050]
1. By having synchronization information between Audio Object and Real-Time Text Object, access becomes faster and editing processing such as partial deletion and division can be performed at high speed.
[0051]
1 to 5 and 9 to 13, RT_Text_Pack Address Offsets 351 to 360 correspond to synchronization information between the Audio Object and the Real-Time Text Object, and are shown in FIGS. 14 to 20. In the method, the combination of the reproduction time management information of the Audio Object Entry 171 to 179 and the Real-Time Text Object Entry 191 and 192 corresponds to the synchronization information between the Audio Object and the Real-Time Text Object.
[0052]
When performing special playback such as time search that starts playback from a specified playback time, fast forward, rewind, etc., at which address audio information and text information to be displayed at the specified time are recorded from the above management information It is possible to access the minimum necessary addresses. As a result, in the disk drive unit 400, access to the information storage medium 400 is accelerated, and not only the cue speed in time search is increased, but also text information can be displayed during very fast forward and rewind.
[0053]
Further, when editing such as partial erasure or division, audio object (AOB) division processing is required as shown in FIGS. 2 and 3, but Audio Object and Real-Time are included in the management information recording area as in the present invention. Since there is synchronization information between Text Objects, it is possible to know the address where the audio information and text information to be displayed at any playback time are recorded just by searching the information in the management information recording area, and at any position The division boundary position of the edited Audio Object (AOB) can be known.
[0054]
Therefore, according to the present invention, it is possible to know the division boundary position at the time of editing by simply examining the synchronization information recorded in the management information recording area without searching the Object File in which the voice information and the text information are recorded. Can be performed at high speed.
[0055]
2. Real-Time Text information is recorded in a pack format as in the embodiment of the present invention, and the information in the pack can be displayed in synchronization with audio information management units (Audio Object Entry) constituting a plurality of Audio Object Packs. By doing so, special playback processing such as time search, high-speed playback, and rewinding can be performed very easily.
[0056]
3. As shown in FIG. 19, when the method of displaying the text information and the voice information at the same time after pre-reading the text information is adopted as shown in FIG. ) And text information can be displayed continuously without causing delay in displaying the text information.
[0057]
4). In an information recording / reproducing apparatus that records, reproduces, and edits only audio information without displaying text information, editing methods such as partial erasure and rearrangement of only audio information are performed when the methods shown in FIGS. There is a case.
[0058]
When the information storage medium after the editing process in the audio dedicated machine is applied to the information recording / reproducing apparatus that also performs the display process of the text information, the corresponding Real Time Text Object as in the embodiment of the present invention is used. By providing the management information of both the voice information and the text information with information that enables the synchronization relationship repair (time information when recording is first started), the synchronization relationship can be repaired by the method shown in FIG.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an embodiment of the present invention, and is a diagram shown for explaining a recording position relationship and a display timing relationship on an information storage medium between an Audio Object and a Real Time Text Object.
FIG. 2 is a view for explaining a relationship between divided audio objects in the embodiment;
FIG. 3 is a view for explaining a relationship between divided audio objects in the embodiment;
FIG. 4 is a view for explaining a data structure related to audio information recorded in the disc-shaped information storage medium according to the embodiment;
FIG. 5 is a view for explaining the directory structure of an audio file in which audio information that can be recorded and played back in the information storage medium in the embodiment is recorded;
FIG. 6 is a view for explaining the necessity of setting a recording number or ID number within the same recording date as Original Recording time Difference for each Audio Object in the embodiment;
FIG. 7 is a view for explaining the recording format of each Object information in the information storage medium in the embodiment;
FIG. 8 is a block diagram showing the structure in the information recording / reproducing apparatus according to the embodiment.
FIG. 9 is a flowchart for explaining the audio information recording method to the information storage medium when the Audio Object Entry is divided at the Real Time Text display start timing in the embodiment.
FIG. 10 is a flowchart for explaining a method of recording audio information on an information storage medium when dividing an Audio Object Entry at a specific reproduction time interval in the embodiment;
FIG. 11 is an exemplary flowchart for explaining a method for reproducing audio-related information from the information storage medium according to the embodiment;
FIG. 12 is a flowchart shown for explaining partial erasure relating to voice-related information in the embodiment;
FIG. 13 is an exemplary flowchart for explaining a method of erasing text information of a specific part in the embodiment;
FIG. 14 is a diagram for explaining another embodiment of the present invention, and illustrates a directory structure of audio files and text related to recordable / reproducible audio information recorded in an information storage medium.
FIG. 15 is a view for explaining a data structure related to audio information recorded in a disk-shaped information storage medium according to another embodiment;
FIG. 16 is a view for explaining a data structure in an Object File according to another embodiment.
FIG. 17 is a view for explaining a data structure in Real-Time Text Object Information in the other embodiment.
FIG. 18 is a flowchart for explaining a method for recording audio related information in the information storage medium in the other embodiment;
FIG. 19 is a flowchart for explaining a method for reproducing audio-related information from an information storage medium according to another embodiment.
FIG. 20 is a flowchart for explaining a method for repairing the relationship between Audio Object Information and AR_RT_Text Object Information according to another embodiment;
[Explanation of symbols]
400: Information storage medium,
401 ... encoder unit,
402: Decoder unit,
409: Disk drive unit.

Claims (3)

For the information storage medium, the audio information is stored and recorded in the audio pack sequence, the display information is stored and recorded in the real-time information pack sequence, and the audio information and the display information are reproduced and output in synchronization. And displayed,
And, in the recording area different from the recording location of the audio information and display information on the information storage medium, management information related to the audio information and display information is recorded,
The audio information includes a plurality of audio objects, and the audio object and the display information corresponding to the audio object are reproduced and output in synchronization with each other.
In the management information recording area,
General information for managing audio information in units of the audio object; and audio object entry information. The general information includes modified recording time information, a start address and an end address of the audio information, and a start. In addition, the object entry information includes offset information for obtaining the address information of the text information corresponding to the audio object unit,
Further, the audio pack describes synchronization information related to display time for displaying the display information corresponding to the audio information in synchronization with each other,
Read and reproduce the audio information and display information from the information storage medium using the offset information,
A method of reproducing display information, comprising: reading the management information from the information storage medium, and reproducing the display information based on the synchronization information during reproduction of audio information. In a recording method for recording audio information and display information on an information recording medium,
  The audio information is stored and recorded in an audio pack sequence, the display information is stored and recorded in a real-time information pack sequence,
  The audio information includes a plurality of audio objects, and the audio object and the display information corresponding to the audio object are reproduced and output in synchronization with each other.
  Management information related to the audio information and display information is recorded in a recording area different from the recording location of the audio information and display information on the information storage medium,
  In the management information recording area,
  General information for managing audio information in units of the audio object; and audio object entry information. The general information includes modified recording time information, a start address and an end address of the audio information, and a start. In addition, the object entry information includes size information for each corresponding audio object, and further offset information for obtaining the address of text information corresponding to the audio object unit.
  In addition, the audio pack describes synchronization information related to display time for displaying the display information corresponding to the audio information in synchronization with each other. How to record information. In an editing method for editing audio information and display information recorded on an information recording medium,
  On the information recording medium, the audio information is stored and recorded in an audio pack sequence, the display information is stored and recorded in a real-time information pack sequence,
  The audio information includes a plurality of audio objects, and the audio object and the display information corresponding to the audio object are reproduced and output in synchronization with each other.
  Recording different from the recording location of the audio information and display information on the information storage medium Management information regarding the audio information and display information is recorded in the area,
  In the management information recording area,
  General information for managing audio information in units of the audio object; and audio object entry information. The general information includes modified recording time information, a start address and an end address of the audio information, and a start. In addition, the object entry information includes size information for each corresponding audio object, and further offset information for obtaining the address of text information corresponding to the audio object unit.
  Further, the audio pack describes synchronization information related to display time for displaying the display information corresponding to the audio information in synchronization with each other,
  When any object among the plurality of audio objects is deleted, the modified recording time information in the general information corresponding to the other object is corrected, and the display information synchronized with the audio information is displayed. Editing method.

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