JP2004357127A - Video recorder and video recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video recorder and a video recording method for easily performing the additional recording and editing, etc. of a new piece of additional sound data correspondent to already recorded video data. <P>SOLUTION: The video recorder is constituted so that a prescribed chapter is specified to the recorded video data, the additional sound data are additionally recorded in a recording medium only for a time corresponding to the chapter, and additional sound management information for linking a cell for managing the video data corresponding to the additionally recorded additional sound data with the additional sound data recorded in the recording medium is recorded in the recording medium. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a video recording apparatus and a video recording method for recording video data and audio data on a recording medium such as an optical disk, and in particular, adding new audio data in correspondence with video data already recorded on the recording medium. Regarding what to record.
[0002]
[Prior art]
As is well known, for example, on an optical disc such as a DVD (Digital Versatile Disk), video data and audio data are recorded after being subjected to compression processing by the MPEG (Moving Picture Experts Group) system.
[0003]
This recording method has a data structure in which video data and audio data are multiplexed. In this data structure, it is necessary to perform encoding so that buffer control does not break down during the decoding process.
[0004]
Specifically, at the time of recording, the video data and the audio data are multiplexed by encoding all the data including the video data and the audio data at once.
[0005]
For this reason, it is not possible to additionally record new audio data on an optical disc on which the video data and the audio data are recorded in a multiplexed data structure in such a manner as to correspond to the already recorded video data. It will be very difficult.
[0006]
Patent Document 1 discloses that when identification information indicating the presence of additional audio is detected from information attached to video data at the time of reproduction, a time stamp added to the video data and a time stamp added to the additional audio data are used. A configuration for synchronously reproducing video data and additional audio data is disclosed.
[0007]
Patent Document 2 discloses that additional information, time information, and video information recorded in separate files are read out, and the additional information is read along with video information recorded in a separate file from the additional information based on the time information. A configuration for playback is disclosed.
[0008]
Further, Patent Document 3 discloses that after-recording data is written in a predetermined area so that when reproducing video and audio as a completed work, the after-recording data can be easily and accurately matched with the original data in time. A configuration for reproducing is disclosed.
[0009]
However, in these Patent Documents 1 to 3, since the reproduction timing of additional sound or additional information is set using time information such as a time stamp, it becomes difficult to manage the time information. At present, it cannot be said that it is suitable for practical use.
[0010]
[Patent Document 1]
JP 2001-57059 A
[0011]
[Patent Document 2]
JP-A-11-205727
[0012]
[Patent Document 3]
JP-A-11-144378
[0013]
[Problems to be solved by the invention]
Accordingly, the present invention has been made in consideration of the above circumstances, and has been made in consideration of a video recording apparatus and a video recording apparatus capable of easily performing additional recording and editing of new additional audio data in association with already recorded video data. It is an object to provide a video recording method.
[0014]
[Means for Solving the Problems]
A video recording apparatus according to the present invention is intended for recording video data and audio data on a recording medium in units of objects, and recording cells, which are management data for specifying each object, on the recording medium. Setting means for setting a start position or an end position for designating a predetermined chapter with respect to the video data recorded on the recording medium; and a chapter designated by the start position or the end position set by the setting means First recording means for recording the input additional audio data on a recording medium for a time corresponding to the following; a cell for managing video data corresponding to the additional audio data recorded by the first recording means; Second recording means for recording, on a recording medium, additional voice management information for linking additional audio data recorded on a medium.
[0015]
A video recording method according to the present invention is directed to a method of recording video data and audio data on a recording medium in units of objects, and recording cells, which are management data for specifying each object, on the recording medium. And setting a start position or an end position for designating a predetermined chapter with respect to the video data recorded on the recording medium; and for a time corresponding to the chapter specified by the set start position or end position. Recording the input additional audio data on a recording medium; and additional audio management information for linking the cell for managing video data corresponding to the recorded additional audio data with the additional audio data recorded on the recording medium. Is recorded on a recording medium.
[0016]
According to the configuration and the method as described above, the cell for managing the video data corresponding to the recorded additional audio data and the additional audio management information for linking the additional audio data recorded on the recording medium are stored in the recording medium. Since recording is performed, additional recording and editing of new additional audio data can be easily performed in correspondence with already recorded video data without using time information.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a video / audio data recording / reproducing apparatus described in this embodiment. Although this video / audio data recording / reproducing apparatus is shown as a device capable of handling both a DVD-RAM (Random Access Memory) and a hard disk as a recording medium, a hard disk or a DVD-RAM is, for example, a recording medium using a semiconductor memory. And so on.
[0018]
When each block in FIG. 1 is roughly divided, the main block of the recording unit is shown on the left side, and the main block of the reproducing unit is shown on the right side.
[0019]
The video / audio data recording / reproducing apparatus of FIG. 1 has two types of disk drive units. First, there is provided a disk drive unit 12 for rotatingly driving an optical disk 11 as a first medium, which is an information recording medium capable of constructing a video file, and executing reading and writing of information.
[0020]
Further, it has a hard disk drive unit 13 for driving a hard disk as a second medium. The data processor unit 14 can supply recording data to the disk drive unit 12 and the hard disk drive unit 13 and can receive reproduced signals. The disk drive unit 12 has a rotation control system for the optical disk 11, a laser drive system, an optical system, and the like.
[0021]
The data processor 14 handles data in units of recording or reproduction, and includes a buffer circuit, a modulation / demodulation circuit, an error correction unit, and the like.
[0022]
The video / audio data recording / reproducing apparatus shown in FIG. 1 includes, as main components, an encoder unit 15 constituting a recording side, a decoder unit 16 constituting a reproducing side, and a microcomputer block 17 for controlling the operation of the apparatus main body. I have.
[0023]
The encoder unit 15 includes a video and audio analog-to-digital converter for digitizing an input analog video signal or analog audio signal, a video encoder, and an audio encoder. Further, it includes a sub-picture encoder.
[0024]
The output of the encoder unit 15 is converted into a predetermined DVD-RAM format by a formatter 19 including a buffer memory 18 and supplied to the data processor unit 14.
[0025]
An external analog video signal and an external analog audio signal from an A / V (Audio Video) input unit 20, or an analog video signal and an analog audio signal from a TV (Television) tuner unit 21 are input to the encoder unit 15. You.
[0026]
Note that, when a directly compressed digital video signal or digital audio signal is directly input, the encoder unit 15 can directly supply the compressed digital video signal or digital audio signal to the formatter 19. In addition, the encoder unit 15 can directly supply a digital video signal, an audio signal, and the like, which have been converted from analog to digital, to the video mixing unit 22 and the audio selector 23.
[0027]
In the video encoder included in the encoder unit 15, the digital video signal is converted into a digital video signal compressed at a variable bit rate based on the MPEG2 or MPEG1 standard. The digital audio signal is converted to a digital audio signal compressed at a fixed bit rate based on the MPEG or AC (Audio Compression) -3 standard, or a linear PCM (Pulse Code Modulation) digital audio signal.
[0028]
When the sub video signal is input from the A / V input unit 20 (for example, a signal from a DVD video player with an independent output terminal for the sub video signal), or a DVD video signal having such a data structure is broadcasted, Is received by the TV tuner section 21, the sub-picture signal in the DVD video signal is encoded (run-length encoded) by the sub-picture encoder to become a sub-map bitmap.
[0029]
The encoded digital video signal, digital audio signal, and sub-picture data are packed by the formatter 19 to become a video pack, an audio pack, and a sub-picture pack. Standard for Recording on RAM, DVD-R (Recordable), DVD-RW (Rewritable), etc.].
[0030]
Here, the apparatus shown in FIG. 1 transmits the information (packs of video, audio, sub-picture data, etc.) formatted by the formatter 19 and the created management information to the hard disk drive 13 or the disk via the data processor 14. The data can be supplied to the drive unit 12 and recorded on the hard disk or the optical disk 11.
[0031]
Further, information recorded on the hard disk or the optical disk 11 can be recorded on the optical disk 11 or the hard disk via the data processor unit 14 and the disk drive unit 12.
[0032]
It is also possible to perform editing processing such as partially deleting video objects of a plurality of programs recorded on the hard disk or the optical disk 11 or connecting objects of different programs. This is because the data unit handled by the format according to this embodiment is defined, and editing is facilitated.
[0033]
The microcomputer block 17 includes an MPU (Micro Processing Unit) or a CPU (Central Processing Unit), a ROM (Read Only Memory) in which a control program and the like are written, and a work area necessary for executing the program. RAM.
[0034]
The MPU of the microcomputer block 17 uses the RAM as a work area according to the control program stored in the ROM, detects a defect location, detects an unrecorded area, sets a recording information recording position, records a UDF (Universal Disk Format), / V address setting and the like are executed.
[0035]
The microcomputer block 17 includes an information processing unit necessary for controlling the entire system, and includes a work RAM, a directory detection unit, a VMG (whole video management information) information creation unit, a copy-related information detection unit, It includes a copy and scrambling information processing unit [RDI (Real Time Data Information) processing unit], a packet header processing unit, a sequence header processing unit, an aspect ratio information processing unit, and the like.
[0036]
Of the execution results of the MPU, the contents to be notified to the user are displayed on the display unit 24 of the video / audio data recording / reproducing apparatus, or are displayed on the monitor display 25 by OSD (On Screen Display). Further, the microcomputer block 17 has a key input unit 26 for giving an operation signal for operating this device.
[0037]
The timing at which the microcomputer block 17 controls the disk drive unit 12, the hard disk drive unit 13, the data processor unit 14, the encoder unit 15, and / or the decoder unit 16 is based on time data from an STC (System Time Clock) 27. Can be performed based on Recording and playback operations are normally performed in synchronization with the time clock from the STC 27, but other processing may be performed at a timing independent of the STC 27.
[0038]
The decoder section 16 includes a separator for separating and extracting each pack from a DVD format signal having a pack structure, a memory used for performing pack separation and other signal processing, and main video data (for a video pack) separated by the separator. V) that decodes the content, a SP (Sub Picture) decoder that decodes the sub-picture data (contents of the sub-picture pack) separated by the separator, and the audio data (contents of the audio pack) that is separated by the separator A decoder. In addition, a video processor is provided for appropriately combining the decoded main video with the decoded sub-video and overlaying the main video with a menu, a highlight button, subtitles and other sub-videos.
[0039]
The output video signal of the decoder section 16 is input to the video mixing section 22. In the video mixing section 22, text data is synthesized. The video mixing unit 22 is also connected to a line that directly takes in signals from the TV tuner unit 21 and the A / V input unit 20.
[0040]
A frame memory 28 used as a buffer is connected to the video mixing unit 22. When the output of the video mixing unit 22 is an analog output, it is externally output via an I / F (interface) 29, and when it is a digital output, it is output to a monitor display 25 via a digital / analog converter 30.
[0041]
The output audio signal of the decoder unit 16 is converted to an analog signal by the digital-to-analog converter 31 via the selector 23 and output to the speaker 32. The selector 23 is controlled by a select signal from the microcomputer block 17. Thus, the selector 23 can directly select a signal that has passed through the encoder unit 15 when directly monitoring a digital signal from the TV tuner unit 21 or the A / V input unit 20.
[0042]
Note that the formatter of the encoder unit 15 creates each segmenting information during recording and sends it to the MPU of the microcomputer block 17 periodically [information at the time of a GOP (Group Of Picture) head interrupt or the like]. The segmentation information includes the number of packs of a VOBU (Video Object Unit), the end address of an I (Intra) picture from the beginning of the VOBU, the playback time of the VOBU, and the like.
[0043]
At the same time, information from the aspect ratio information processing unit is sent to the MPU at the start of recording, and the MPU creates VOB (Video Object) stream information (STI). Here, the STI stores resolution data, aspect data, and the like, and at the time of reproduction, each decoder performs initial setting based on this information.
[0044]
In this apparatus, one video file is used for one disk. In order to continue reproduction without interruption while accessing (seeking) data, at least a continuous information unit (size) is determined. This unit is called CDA (Contiguous Data Area). The CDA size is a multiple of an ECC (Error Correcting Code) block (16 sectors), and the file system performs recording in CDA units.
[0045]
The data processor unit 14 receives data in VOBU units from the formatter 19 of the encoder unit 15 and supplies data in CDA units to the disk drive unit 12 or the hard disk drive unit 13.
[0046]
Further, the MPU of the microcomputer block 17 creates management information necessary for reproducing the recorded data, and sends the created management information to the data processor unit 14 when recognizing a data recording end command. Thus, the management information is recorded on the disc.
[0047]
Therefore, when encoding is being performed, the MPU of the microcomputer block 17 receives information (data such as segmentation information) in data units from the encoder unit 15.
[0048]
At the start of recording, the MPU of the microcomputer block 17 recognizes the management information (file system) read from the optical disk 11 and the hard disk, recognizes the unrecorded area of each disk, and changes the recorded area on the data to the data processor unit 14. Via the disk.
[0049]
Here, the relationship between the management information of the real-time DVD and the video object as the content will be briefly described with reference to FIG.
[0050]
In FIG. 2, the video object (VOB) will be described first. The VOB is VR_MOVIE. It is called a VRO file. A video file has a hierarchical structure, one file is composed of one or a plurality of VOBs, one VOB is composed of one or a plurality of VOBUs, and one VOBU is composed of a plurality of packs. The plurality of packs include an RDI pack, a V (video) pack, an A (audio) pack, and the like. An SP (sub-picture) pack may be present.
[0051]
The RDI pack is called a unit control information pack, a navigation information pack, or a real-time data information pack (RDI_PCK). This pack includes information indicating the start time at which the first field of the VOBU to which the VOBU belongs is reproduced, information indicating the recording time of the VOBU, manufacturer information (MNFI), and the like. Also, it includes display control information (DCI) and copy control information (CCI). The display control information indicates aspect ratio information, subtitle mode information, and film camera mode information. The copy control information includes copy permission information or copy prohibition (non-permission) information.
[0052]
The V pack is obtained by compressing video data according to the MPEG2 system and includes a pack header, a packet header, and a video data part. The A-pack is obtained by processing audio data by, for example, a system such as linear PCM, MPEG, or AC-3, and includes a pack header, a packet header, and an audio data part.
[0053]
The management information is called a video manager (VMG), in which a program chain (PGC) for managing the data reproduction order is defined. A cell is defined in the program chain (PGC). The cell (Cell) is linked to video object information (VOBI) which is information on a video object (VOB) to be reproduced.
[0054]
The part where the specific information of the PGC is recorded is the program chain information (PGCI) part. There are two types of PGCI, one is the original PGCI (ORG_PGCI) and the other is the user defined program chain information table (UD_PGCIT).
[0055]
Usually, at the time of recording, an original PGC is created. The user-defined PGCI does not have its own video object, and edits (deletes, deletes, deletes, and deletes) the user-defined cell (UD_Cell) linked to the video object information (VOBI) of the original PGC as shown in FIG. Add) to create a playlist.
[0056]
A time map (TMAP) is described in the VOBI, and the TMAP specifies a VOBU constituting a VOB corresponding to the VOBI. The link from the cell to the VOBI is specified by a logical address. The link from the TMAP information to the VOB and the VOBU is made based on the stream number of the VOB, the number of VOBUs in the VOB, the entry number for each VOBU, and the logical address to each target VOBU.
[0057]
Next, the hierarchy of the program chain information (PGCI) in the management information will be described. As described above, there are two types of program chain information: original program chain information (ORG_PGCI) and user-defined program chain information (UD_PGCI).
[0058]
ORG_PGCI is management information automatically created by the recording / reproducing apparatus when an original program is recorded, and is one type per disc. On the other hand, UD_PGCI is management information as a playlist created by a user arbitrarily designating a part of a plurality of recorded original programs and setting a reproduction order. Therefore, a plurality of UD_PGCIs can be set.
[0059]
FIG. 3 shows the hierarchical structure of the original program chain information. The original program chain information (ORG_PGCI) includes general program chain information (PGC_GI), program information (PGI), a cell information search pointer (CI_SRP), and cell information (CI).
[0060]
PGC_GI describes the number of programs (PG_Ns) indicating the number of programs to be reproduced by the program chain, and the number of cell search pointers (CI_SRP_Ns) indicating the number of cell search pointers. In the example of FIG. 3, there are program information PGI # 1 to PGI #m, and each PGI corresponds to a program that is an original title. Also, there are cell search pointers CI_SRP # 1 to CI_SRP #n.
[0061]
The program information (PGI) includes a program type (PG_TY), the number of cells of the program (C_Ns), and representative image information (REP_PICTI) of the program. The representative image information REP_PICTI describes a cell number of a representative image and a picture point in this cell.
[0062]
The cell search pointer CI_SRP indicates a description address of the corresponding cell information (CI).
[0063]
The description contents of the cell information (CI) will be described separately for a movie cell and a still cell.
[0064]
First, in the case of a movie cell, the cell information includes movie cell general information (M_C_GI) and movie cell entry information (M_C_EPI). The movie cell general information (M_C_GI) indicates a cell type (C_TY) indicating whether it is a movie or a still, an M_VOBI_SRPN for indicating a VOB specified by this cell, and the number of cell entry points. The number of cell entry point information (C_EPI_Ns) is described. In addition, C_V_S_PTM indicating the start time of the video corresponding to this cell and C_V_E_PTM indicating the end time are also described. The movie cell entry point information (M_C_EPI) describes an entry point type (EP_TY) and an entry point presentation time (EP_PTM).
[0065]
In the case of a still cell, the described contents are almost the same as those of the movie cell. However, a still cell is represented as S_VOGI_SRPN because a cell is linked to a VOB group (VOG) including at least one VOB.
[0066]
Instead of the presentation time (PTM), S_S_VOB_ENTN indicating the start VOB number of the VOB group (VOG) corresponding to the still cell and E_S_VOB_ENTN indicating the end VOB number are described. Still VOB entry number (S_VOB_ENTN) is described in the still cell entry point information (S_C_EPI) instead of PTM.
[0067]
In accordance with this, in the description of the representative image information (REP_PICTI) of the above program, when a movie cell is specified as a cell where a representative image exists, a PTM is specified as a picture point in the cell, and a still cell is specified. Describes a still VOB entry number (S_VOB_ENTN) as a picture point in a cell.
[0068]
FIG. 4 shows a hierarchical structure of the user-defined program chain information. The user defined program chain information table (UD_PGCIT) includes user defined program chain information table information (UD_PGCITI), a user defined program chain information search pointer (UD_PGCI_SRP), and user defined program chain information (UD_PGCI). included.
[0069]
UD_PGCITI describes the number of search pointers (not shown in FIG. 4 but abbreviated as UD_PGCI_SRP_Ns) indicating how many user-defined program chain information search pointers exist.
[0070]
The user-defined program chain information search pointer (UD_PGCI_SRP) indicates a description address of the corresponding user-defined program chain information (UD_PGCI). In the example of FIG. 4, user-defined program chain information UD_PGCI # 1 to UD_PGCI #m exists.
[0071]
In the video manager (VMG) as the management information, the playlist information is described in a place different from the program chain information. In each piece of playlist information, the number of the user-defined program chain information search pointer (UD_PGCI_SRP) linked to the playlist is described (PGCN). Therefore, as the program chain information, each UD_PGCI corresponds to a playlist.
[0072]
The format of the user-defined program chain information (UD_PGCI) is substantially the same as the format of the original program chain information (ORG_PGCI) described with reference to FIG. However, since the UD_PGCI is configured by combining an arbitrary part of the original program, the UD_PGCI does not include the above-described program information (PGI). Therefore, the playlist type (PL_TY) and the representative image information (REP_PICTI) of the playlist are described in the playlist information described in a place different from the program chain information described above. . Since the format of the cell information is the same as that of the ORG_PGCI, the description is omitted here.
[0073]
5 and 6 show the structure of entry point information in the DVD-VR standard. There are two types of this entry point information: type A shown in FIG. 5 and type B shown in FIG.
[0074]
The type A entry point is configured by indicating the type of the entry point (EP_TY) and recording the PTM indicated by the entry point (EP_PTM).
[0075]
Type B entry points also have primary text information (PRM_TXTI). This PRM_TXTI is defined by 128 bytes and includes 64 bytes of the first field and 64 bytes of the second field. An ASCII code must be set in the first field, and a character set specified in VMGI_MAT must be described in the second field.
[0076]
<Additional audio management and playback method>
7 to 9 show the additional voice management method described in this embodiment. In addition to the files defined by the VR standard, a file for recording additional audio management information and a file for recording additional audio data are installed. By setting the additional voice management information so as to link to the cell information of the VR management information, the additional voice data and the original data are linked.
[0077]
First, the management method A shown in FIG. 7 will be described. In the additional audio management information, information for specifying a cell including the additional audio and an audio stream data file name in which the additional audio data is recorded are recorded.
[0078]
One audio stream data file is defined for one cell. When the user specifies and reproduces the additional audio, the stream data file is specified from the linked additional audio management information when the cell information is referred to in the reproduction processing, and the data is read from the head of the file and reproduced.
[0079]
The management method B shown in FIG. 8 will be described. In the additional audio management information, information for specifying a cell including the additional audio and position information of the recorded additional audio data on the audio stream data file are recorded.
[0080]
One audio stream data file is defined regardless of the total number of cells. When the user specifies and reproduces the additional audio, the recording start position in the stream data file is specified from the linked additional audio management information when the cell information is referred to in the reproduction processing, and the data is read and reproduced.
[0081]
The management method C shown in FIG. 9 will be described. In the additional audio management information, information for specifying a cell containing the additional audio, an audio stream data file name in which the additional audio data is recorded, and positional information of the recorded additional audio data in the audio stream data file are recorded. deep.
[0082]
It is defined that one audio stream data file is created for a specified section. When the user specifies and reproduces the additional audio, the stream data file is specified from the additional audio management information linked when the cell information is referenced in the reproduction processing, and the recording start position on the file is specified and the data is read. Reproduce.
[0083]
<How to set additional audio>
FIG. 10 shows an additional voice setting method described in this embodiment. It is assumed that the entry point (EP) can be set by the user. The chapter described below refers to the entire cell if there is only one cell in the title and no EP, or a section from the head of the first cell in the title to the next EP, or from the last EP in the title. This indicates a section up to the end of the title or a section from an EP in the title to the next EP.
[0084]
The user determines the chapter to which the additional audio data is added by setting the EP. When adding an additional voice, the cell is divided at the start position and the end position of the chapter in order to manage the additional voice. When dividing the original cell, the corresponding VOB is also divided.
[0085]
The recording time of the additional audio to be recorded in the determined chapter is determined by one of the following methods.
[0086]
1. The recording time is calculated from the PTM of the cell in the chapter.
[0087]
2. When recording the original data, an RDI pack is recorded at the beginning of the VOBU, and the number of audio packs included in the VOBU is embedded in the RDI pack. The recording time is determined by determining the number of packs included in the chapter by searching the RDI packs and calculating the total sum.
[0088]
3. The original data is searched, the audio pack is searched, and the recording time is determined by the number.
[0089]
<Additional audio recording method>
FIG. 11 shows an additional voice recording method described in this embodiment. A screen for reproducing the original video of the specified chapter and a progress bar indicating the reproduction position in the chapter are provided. As a terminal for inputting additional audio, an existing audio input terminal is used, or a terminal for additional audio is provided.
[0090]
For the reproduction of the original video, special reproduction is also possible with the reproduction-related keys of the main body and the remote controller. Recording starts / stops at the position where the sound is added by the user's key operation. Since the additional audio recording time is determined by the method described above, it is assumed that recording beyond that time cannot be performed.
[0091]
By adding a preview button, it is also possible to add a function of previewing recorded audio on the spot. When re-recording, the previous additional audio data is deleted and newly recorded.
[0092]
<Additional audio editing method>
12 to 15 show the additional audio editing method described in this embodiment. FIG. 12 shows a state before editing. It is assumed that the position of the EP is reset by the user, and a change is made to the already set additional voice. The above-described management method is used when a chapter is set over a cell where the additional audio is not set and a cell where the additional audio is set, and the additional audio is recorded in the chapter or the part is deleted. A, B, and C will be described separately.
[0093]
FIG. 13 shows an editing method corresponding to the management method A. First, the cell A is divided into a cell A-1 and a cell A-2 at the EP1 portion. Similarly, the cell B is divided into a cell B-1 and a cell B-2 at the EP2 portion. Since one audio stream data file is provided for one cell, when the cell B is divided, the audio stream data file is also divided into EP2 portions. Accordingly, the management information is also updated.
[0094]
When recording the additional audio, an audio stream data file for the cell A-2 is added and recorded. The management information manages the cell A-2, the cell B-1, and the cell B-2.
[0095]
When deleting the additional audio of the specified chapter, the audio stream data file linked to the cell B-1 is deleted and deleted from the management information. In that case, the division at EP1 in cell A is not always necessary.
[0096]
FIG. 14 shows an editing method corresponding to the management method B. First, the cell A is divided into a cell A-1 and a cell A-2 at the EP1 portion. Similarly, the cell B is divided into a cell B-1 and a cell B-2 at the EP2 portion. Accordingly, the management information is also updated.
[0097]
When the additional audio is recorded, since there is one audio stream data file, the audio data of the cell A-2 is added to the file. The audio data of the cell B-1 is overwritten or added to the original location. The management information of the cells A-2 and B-1 in which the audio data is recorded is also updated.
[0098]
When deleting the additional audio of the specified chapter, the audio data linked to the cell B-1 is deleted from the audio stream data file. In that case, the division at EP1 in cell A is not always necessary.
[0099]
FIG. 15 shows an editing method corresponding to the management method C. First, the cell A is divided into a cell A-1 and a cell A-2 at the EP1 portion. Similarly, the cell B is divided into a cell B-1 and a cell B-2 at the EP2 portion. Accordingly, the management information is also updated.
[0100]
When recording the additional audio, one audio stream data file is created for the chapter to be added, so the audio data of the cells A-2 and B-1 is stored as one file.
[0101]
When deleting the additional audio of the specified chapter, the audio data linked to the cell B-1 is deleted from the audio stream data file. In that case, the division at EP1 in cell A is not always necessary.
[0102]
The above is an example, and it can be realized in other cases by dividing a cell similarly and updating the management method so that there is no inconsistency.
[0103]
<How to insert additional audio during dubbing>
In a device capable of recording on two or more media, such as an HDD & DVD hybrid recorder, when dubbing and copying the audio added as described above from one to the other, by multiplexing and recording these audios, Can be compatible with devices that can play back. At the time of dubbing / copying, it is also possible to specify only the original sound, only the additional sound, or both.
[0104]
FIG. 16 shows a method of encoding and recording the original data video / audio data and the additional audio data again. If only the original audio is specified at the time of dubbing copy, the original data is dubbed and copied as it is.
[0105]
When only the additional audio is specified, the original video data and the additional audio data are decoded, and the signals are encoded and recorded on the medium.
[0106]
When both audios are specified, the original video data, the original audio data, and the additional audio data are decoded together, and the signals are encoded and recorded on the medium. In this example, the audio recording time limit indicated in <additional audio setting method> is effectively “1.” determined by the chapter length.
[0107]
FIGS. 17A and 17B show a method of recording original data video / audio data and additional audio data on a medium without re-encoding. If only the original audio is specified at the time of dubbing copy, the original data is dubbed and copied as it is.
[0108]
When only the additional audio data is specified, the audio pack in which the original audio data is recorded is replaced with the additional audio data and recorded on the medium.
[0109]
If both voices are specified, they are recorded as an audio pack of additional voice data after the audio pack in which the original voice data is recorded. In this example, “2.” and “3.”, which are determined by the number of audio packs, are effective as the audio recording time limit shown in <additional audio setting method>.
[0110]
As described above, by managing the additional audio data, it becomes possible to add and edit the audio to the original data later.
[0111]
It should be noted that the present invention is not limited to the above-described embodiments as they are, and can be embodied by variously modifying constituent elements in an implementation stage without departing from the scope of the invention.
[0112]
Various inventions can be formed by appropriately combining a plurality of components disclosed in the above-described embodiments. For example, some components may be deleted from all the components described in the embodiments. Further, constituent elements according to different embodiments may be appropriately combined.
[0113]
【The invention's effect】
As described above in detail, according to the present invention, there is provided a video recording apparatus and a video recording method which can easily perform additional recording and editing of new additional audio data in correspondence with already recorded video data. Can be provided.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention and is a block diagram illustrating a video / audio data recording / reproducing apparatus.
FIG. 2 is an exemplary view for explaining a relationship between management information and a video object according to the embodiment;
FIG. 3 is an exemplary view for explaining a hierarchical structure of original program chain information according to the embodiment;
FIG. 4 is an exemplary view for explaining a hierarchical structure of user-defined program chain information according to the embodiment;
FIG. 5 is an exemplary view for explaining an example of the structure of entry point information according to the embodiment;
FIG. 6 is an exemplary view for explaining another example of the structure of entry point information according to the embodiment;
FIG. 7 is an exemplary view for explaining one row of the additional voice management method according to the embodiment;
FIG. 8 is an exemplary view for explaining another column of the additional voice management method in the embodiment.
FIG. 9 is an exemplary view for explaining still another column of the additional voice management method in the embodiment.
FIG. 10 is an exemplary view shown for explaining an additional audio setting method in the embodiment.
FIG. 11 is an exemplary view shown for explaining the additional sound recording method in the embodiment.
FIG. 12 is a view for explaining a state before editing of the additional audio editing method in the embodiment.
FIG. 13 is an exemplary view for explaining an example of an additional audio editing method in the embodiment.
FIG. 14 is an exemplary view for explaining another example of the additional audio editing method in the embodiment.
FIG. 15 is an exemplary view shown for explaining still another example of the additional audio editing method in the embodiment;
FIG. 16 is an exemplary view for explaining encoding and dubbing of video / audio data and additional audio data again in the embodiment.
FIG. 17 is an exemplary view for explaining dubbing of video / audio data and additional audio data without re-encoding in the embodiment.
[Explanation of symbols]
11 optical disk, 12 disk drive unit, 13 hard disk drive unit, 14 data processor unit, 15 encoder unit, 16 decoder unit, 17 microcomputer block, 18 buffer memory, 19 formatter, 20 A / V input section, 21 TV tuner section, 22 video mixing section, 23 audio selector, 24 display section, 25 monitor display, 26 key input section, 27 STC, 28 frame memory section, 29 ... I / F, 30, 31: digital-to-analog converter, 32: speaker.

Claims (12)

In a video recording device that records video data and audio data on a recording medium in units of objects, and records cells that are management data for specifying each object on the recording medium,
Setting means for setting a start position or an end position for designating a predetermined chapter for the video data recorded on the recording medium,
First recording means for recording the input additional audio data on the recording medium for a time corresponding to the chapter specified by the start position or the end position set by the setting means;
The additional audio management information for linking the cell for managing the video data corresponding to the additional audio data recorded by the first recording means and the additional audio data recorded on the recording medium is recorded on the recording medium. A video recording apparatus comprising: a second recording unit. The second recording means includes information for specifying a cell that manages video data corresponding to the additional audio data recorded by the first recording means, and file information of the additional audio data recorded on the recording medium. The video recording apparatus according to claim 1, wherein the additional audio management information including the following is generated and recorded on the recording medium. The second recording means includes: information for specifying a cell for managing video data corresponding to the additional audio data recorded by the first recording means; and additional audio data recorded as a file on the recording medium. 2. The video recording apparatus according to claim 1, wherein the additional audio management information including position information on the file is generated and recorded on the recording medium. The second recording means includes information for specifying a cell that manages video data corresponding to the additional audio data recorded by the first recording means, and file information of the additional audio data recorded on the recording medium. 2. The video recording apparatus according to claim 1, wherein the additional audio management information including additional audio data and position information of the additional audio data on the file is generated and recorded on the recording medium. The method according to claim 1, wherein the second recording unit divides a cell for managing video data recorded on the recording medium and an object at a start position or an end position of the chapter set by the setting unit. Item 4. The video recording device according to Item 1. 2. The video recording apparatus according to claim 1, wherein the first recording unit calculates a recording time of the additional audio data based on time information included in a cell in the chapter specified by the setting unit. apparatus. The said 1st recording means calculates the recording time of the said additional audio data based on the number of audio packs contained in the object corresponding to the cell in the chapter designated by the said setting means. Item 4. The video recording device according to Item 1. The first recording means calculates the recording time of the additional audio data by counting the number of audio packs included in the object corresponding to the cell in the chapter specified by the setting means. The video recording device according to claim 1. 9. The video recording apparatus according to claim 5, wherein the setting unit sets a start position or an end position of the chapter at an entry point. In the state where the recording of the additional audio data is requested, the input video data and the additional audio data are encoded and multiplexed and recorded on the recording medium, and the recording of the audio data and the additional audio data is requested. 2. The video recording apparatus according to claim 1, wherein the input video data, audio data and additional audio data are encoded and multiplexed and recorded on the recording medium. In a state where the recording of the additional audio data is requested, the audio pack of the audio data recorded on the recording medium is rewritten to the input additional audio data, and the recording of the audio data and the additional audio data is requested. 2. The video recording apparatus according to claim 1, wherein an audio pack of the input audio data and an audio pack of the input additional audio data are recorded so as to be continuously arranged. In a video recording method for recording video data and audio data on a recording medium in units of objects, and recording cells, which are management data specifying each object, on the recording medium,
Setting a start position or an end position for designating a predetermined chapter for the video data recorded on the recording medium;
Recording the input additional audio data on the recording medium for the time corresponding to the chapter specified at the set start position or end position,
Recording on the recording medium, a cell for managing video data corresponding to the recorded additional audio data, and additional audio management information for linking the additional audio data recorded on the recording medium. A video recording method, characterized in that:

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