JP2003007003A - Information recorder and method for information recording - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information recording and reproducing device capable of freely processing recording, reproducing, editing, etc., one or a plurality of pieces of information data having different attributes of an encoding system, image display, etc. SOLUTION: The information recorder for recording the information data in the information data are of a recording medium and recording management data of the information data in the management data area of the recording medium is provided with a recording means for recording data in the recording medium and a recording control means. When there is no attribute information data showing the reproducing system of the information data, the recording control means adds and records new management data to the existing management data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus and method for recording digital data compressed by a variable transfer rate coding system.

[0002]

2. Description of the Related Art Minidiscs (MD), magneto-optical discs (MO), and the like are widely used as recording / reproducing media for recording / erasing digital data which are now widely used. On the other hand, technical development is being actively pursued for practical use of a digital video disk (DVD-R / W) capable of recording and reproducing for a long time with high image quality and high sound quality. In DVD-R / W, information data such as a movie is recorded on a high-density disc, but images are recorded / reproduced by a high-efficiency encoding method such as MPEG2 and audio is compressed by PCM or AC3. To do. In the present specification, one set of data such as one program and one movie is referred to as an information data piece, and data obtained by collecting one or a plurality of information data pieces is referred to as an information data group.

In a conventional digital data recording / reproducing system for recording / reproducing data having different encoding systems, for example, a recording / reproducing system used in a magneto-optical disk, information data of different formats are mixed and recorded on a recording medium. However, at the time of reproduction, it is necessary to read the information data and then individually perform reproduction processing according to the encoding method. Therefore, it is difficult to continuously reproduce a plurality of information data groups or perform editing such as chapter setting and erasing even if the information data is of the same encoding method.

[0004]

Such a problem occurs in a recording / reproducing apparatus for rewritably recording / reproducing data of a plurality of different encoding systems. The present invention has been made in view of the above points, and an object of the present invention is to have different attributes such as an encoding method and an image display.
An object of the present invention is to provide an information recording apparatus and method capable of freely performing processing such as recording, reproduction and editing of one or a plurality of information data groups.

[0005]

According to the present invention, there is provided an information recording apparatus for recording information data in an information data area of a recording medium and recording management data of the information data in the management data area of the recording medium. Recording means for recording data on a recording medium, and recording control means. The recording control means, when the attribute information data indicating the reproducing method of the information data does not exist, adds new management data to the existing management data. It is characterized by being added to the management data and recorded.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 schematically shows the configuration of a digital data recording / reproducing apparatus according to the present invention. The digital data recording / reproducing apparatus in FIG. 1 uses analog audio signals and image signals of, for example, a television tuner as sources. The input audio signal is sent to the A / D converter 2
Is digitized by and supplied to the audio encoder 3, while the image signal is digitized by the A / D converter 4 and supplied to the image encoder 5.

The voice encoder 3 subjects the digital voice signal to predetermined code conversion (for example, compression processing), and supplies the code conversion output to the first input of the multiplexer 8. The image encoder 5 performs predetermined code conversion (for example, compression processing) on the digital image signal, and supplies the code conversion output to the second input of the multiplexer 8. The management data signal generated by the system control circuit 10 is supplied to the third input of the multiplexer 8. Multiplexer 8
Generates time-division multiplexed first, second and third input signals to generate multiplexed information signals of audio and image information data signals and management data signals. The multiple information signal is supplied to the recording / reproducing control circuit 15 and is subjected to recording on a rewritable recording medium such as a rewritable DVD-R / W.

In the reproducing mode for reproducing the recorded information on the recording medium 17, the recording / reproducing control circuit 15 uses the demultiplexer 22 to detect the multiple information signal read by the recording / reproducing head 19.
Is supplied to. The demultiplexer 22 performs time-division demultiplexing on the supplied multiple information signal, and outputs an audio signal, an image signal and a management data signal having the same format as the input of the multiplexer 8 in each system.

The output audio signal of the demultiplexer 22 is
It is supplied to the audio decoder 23 and subjected to a conversion process (for example, expansion process) opposite to the code conversion performed by the encoder 3. This inverse conversion output is the D / A converter 24.
Is converted to analog and is derived as analog voice output. Further, the output image signal of the demultiplexer 22 is supplied to the image decoder 25, and is subjected to conversion processing (for example, expansion processing) opposite to the code conversion performed in the encoder 5, and the inverse conversion output is D / A. Converter 26
Is converted into analog and is derived as an analog image output.

In the recording mode for recording audio / image signals, the recording / reproducing head 19 writes the multiple information signal in a predetermined format on the recording medium 17 under the control of the recording / reproducing control circuit 15 according to the instruction from the system controlling circuit 10. . At this time, the multiplexed information signal is simultaneously sent to the demultiplexer 2
2 is also supplied. The flow of signal processing of the subsequent system including the demultiplexer 22 after the recording / reproducing control circuit 15 in the recording mode is similar to that described above.

As the recording medium 17 to be loaded, the above-mentioned D
In addition to the VD-R / W, a recording medium on which information can be overwritten is possible. The system control circuit 10 also issues a command signal for controlling the read operation and the write operation to the recording / reproducing control circuit 15. Each of these command signals includes address information indicating the actual recording position or area of the loaded recording medium. With this address information, it is possible to write information at an arbitrary recording position on the recording medium and read information at an arbitrary recording position. In short, the system control circuit 10 performs address control for accessing an arbitrary recording position of the recording medium in the information reproducing and recording mode of the recording medium.

Further, the system control circuit 10 controls other parts in accordance with a command signal from the operation part 30 as a user interface. A typical one of such command signals is a recording / reproducing command and an editing command such as a chapter setting command or an erasing command during a reproducing or recording operation. Therefore, the operation unit 30 serves as a change command unit that generates a change command in the editing function.

Further, the system control circuit 10 uses the memory 35 for storing the data indicating the recording / reproducing or editing instruction and the data read from the recording medium 17 to perform the operation according to the operation content of the operation unit 30. It is possible to have In the above description, a digital data recording / reproducing apparatus having a TV tuner or the like as a source has been described as an example, but the present invention is not limited to such a form, and the TV tuner, the A / D converters 2, 4, and the encoders 3, 5 are not provided , An external input terminal for audio and image which is directly led to the multiplexer 8 is provided, and an audio digital signal or an image digital signal which has been subjected to code conversion in advance in the encoders 3 and 5 can be supplied to this external input terminal. You may take the form.

The system control circuit 10 and the recording / reproducing control circuit 15 also serve as recording control means and reproduction control means. Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 2 shows the structure of the information data group and management data recorded on the recording medium. The VMGI is data for managing the entire disc and stores disc common data relating to the information data group, for example, disc menu data. The VOBS is one of the VOB, which is one piece of information data piece such as one program, one movie, etc.
It is a group of information data in which one or more are collected. VTSI is V
It is management data about OBS. BUP is VT
It is a backup of SI and contains the same contents as VTSI. The VOB is further divided into a plurality of segments (fragments), which are hereinafter referred to as cells.

FIGS. 3 and 4 are schematic diagrams for explaining an example of a data structure recorded on an optical disc as a recording medium in the digital data recording / reproducing apparatus according to the present invention. In the present invention, each cell is divided into a series of a plurality of units as shown in FIG. 3, and reproduction is required from the beginning position (time T = 0) of the information data piece to which the cell belongs to the beginning position of the unit. The time (t _{s, u} ) is added as a unit start time to each unit and recorded. Furthermore, the cell start time (T _S ) and the unit start time equal to the required playback time from the start position of the information data piece to which the cell belongs to the start position of each cell
Record (ts _{, u} ) in the VTSI. The required playback time (P _S ) of each cell is also recorded in VTSI.

In the present invention, when recording a plurality of information data groups, each management data V is recorded as shown in FIG.
TSI #i (i = 1, 2, ...) Is collectively recorded in a predetermined position of the disc, for example, in a management data area defined in the inner peripheral portion. In addition, the backup data BUP #i (i =
1, 2 ,. ． ． ) Is similarly recorded in the recording area. In this case, it is preferable to continuously record in the recording area of VTSI #i. Further, the disk common data VMGI is also recorded in this management data area. As the management data area, a recording area sufficient to record the maximum expected VTSI #i and BUP #i is prepared in advance. The information data group is recorded in the information data area, but the VOB is the corresponding VTSI.
May not be recorded in that order, and there may be a free area.

In the present invention, the management data VTSI further includes attribute information data indicating the reproduction method of each of the information data group VOBS. The attribute information data includes image display information such as an encoding method for convenience of decoding and a scanning speed / number of scanning lines, aspect ratio and the like for convenience of display of reproduction. For example, in the example shown in FIG. 5, the attribute information data is classified into 12 types of modes. The information data group is recorded or reproduced based on this attribute information data, but it is preferable that the same type of attribute information data is recorded in the same VTSI.

Recording and reproducing operations of the digital data recording / reproducing apparatus according to the embodiment of the present invention will be described below with reference to the flowcharts. FIG. 6 shows an example procedure of a recording operation processing routine executed by the system control circuit 10. The system control circuit 10 fetches set values such as a recording command such as a recording mode and a recording time from the memory 35 using the operation unit 30 by the user (step 11), and the recording / reproducing control circuit 15 stores an empty area of the information data area. The audio / image data in the desired recording mode (hereinafter A
It is abbreviated as V data. ) And the unit start time (ts _{, i} , i = 1,2, ...) are issued (step 12). The system control circuit 10 determines whether or not a user inputs a cell division instruction using the operation unit 30, that is, an interrupt instruction such as chapter setting (step 13). Explaining with reference to FIG. 3, when an interrupt instruction such as chapter setting is input, the system control circuit 10
Is the unit start time (t _{s, u} ) at that time (the time of unit #u in cell #S) is the start time (T _{s, 2} ) of the new cell, and is a new preceding cell after division. The time required for reproduction (units # 1 to # u-1) (P _{s, 1} ) is stored in the memory 35 (step 14). Next, the system control circuit 10 determines whether or not the recording of the AV data is completed based on the recording setting value by the user (step 15), and if the recording is completed, the recording operation is completed (step 16). Next, the system control circuit 10 fetches the management data stored in the memory 35 from the memory 35 (step 17). Incidentally, in the digital data recording / reproducing apparatus according to the present embodiment, all the management data in the management data area of the disc are read when the disc is loaded, and the memory 3
5, the management data is managed on the memory while the disc is loaded. Next, the system control circuit 10 judges whether or not the attribute information data of the recorded AV data is already in the management data (step 18), and if it is already present, the same attribute information data as the recorded AV data is set. The management information is overwritten on the included VTSI (step 19). If the same attribute information data does not yet exist, a VTSI including the attribute information data and management data is newly added to the existing VTSI and recorded (step 20), and the recording operation processing is completed.

FIG. 7 shows a procedure of an example of a reproduction operation processing routine executed by the system control circuit 10. The system control circuit 10 fetches the setting value of the desired reproduction program or the like input by the user from the memory 35 (step 31). Next, when the disc is loaded, the management data that has been read from the disc and stored therein is loaded from the memory 35 (step 32), and the mode and management data relating to the desired playback program are identified from the loaded management data (step 33). Next, based on the identified mode and management data, the recording / reproducing control circuit 15 is instructed to reproduce the AV data of the desired program (step 34). The system control circuit 10 determines whether or not the reproduction of the AV data based on the set value is completed (step 35), and if the reproduction is completed, issues a reproduction stop command (step 36) and completes the reproduction operation processing. .

FIG. 8 shows a procedure of an example of a cell division processing routine for performing editing such as chapter setting and deletion. The system control circuit 10 calls a reproduction routine and commands a disk reproduction operation (step 41). This will be described with reference to FIG. 3. When a cell division signal is input from the operation unit 30 during reproduction, the system control circuit 10 takes in the signal (step 42) and the unit start time at that time.
(t _{s, u} ) is fetched from the playback data (step 4
3). Next, the reproduction required time (P _s ) and the cell start time (T _s ) of the cell to which the unit before division belongs are fetched from the memory 35 which was read from the disc when the disc was loaded (step 44). Next, from these three values (P _s , T _s , t _{s, u} ), the required playback time (respectively, P _{s, 1} and P _{s, 2} ) of the divided cell is calculated ( Step 45). Cell playback time before division (P _s )
And the cell start time (T _s ) are deleted from the memory 35 (step 46), and the cell reproduction required time (P _{s, 1} ,
P _{s, 2} ) and the cell start time (T _{s, 1} and T _{s, 2} respectively) are stored in the memory 35 (step 47). The system control circuit 10 determines whether or not the cell division processing is completed (step 48), and if not completed, repeats the flow from the signal acquisition (step 42), and if the cell division processing is completed, stops reproduction. Issue a command (Step 4
9) Then, a command for recording the management data stored in the memory 35 in the management data area of the disc is issued to the recording / reproducing control circuit 15 (step 50), and the cell division processing is completed.

FIG. 9 shows a procedure of an example of a cell erasing processing routine at the time of editing. The system control circuit 10 fetches the desired cell erase setting value input by the user from the memory 35 (step 61), and deletes the reproduction time and cell start time of the cell designated to be erased from the management data on the memory (step 62). ). Next, the system control circuit 10 determines whether or not the erasing process of the designated cell is completed (step 63), and if it is not completed, the flow from the data deletion on the memory (step 62) is repeated, and the cell is deleted. If the erasing process is completed, a command to record the management data stored in the memory 35 in the management data area of the disc is issued to the recording / reproducing control circuit 15 (step 64), and the cell erasing process is completed.

FIG. 10 shows a procedure of an example of a reproduction time calculation routine used by the system control circuit 10 during the reproduction operation. The system control circuit 10 fetches the required playback time (P _i ) and cell start time (T _i ) of each cell of the information data piece designated for playback from the management data on the memory 35 (step 71). The unit start time (ts _{, u} ) of the unit being reproduced is fetched (step 72), and the sum of the required reproduction times of the cells preceding the cell being reproduced (ΣP _i ; i = 1,2 ,.
s-1) and a value obtained by subtracting the cell start time of the cell being reproduced from the unit start time of a unit in the playback (t _s, and _u -T _S) the sum of the reproduction time (step 73). Therefore, the cell before the cell being reproduced, for example, cell #k (1 <k
Even if <S) has already been erased, the reproduction time (P _k ) of the erased cell is not included in the sum of the cell reproduction times (ΣP _i ) and the reproduction time is correct. You can ask. After the above steps are completed, the reproduction time calculation process is completed.

FIG. 11 shows a procedure of an example of a time search routine for searching the reproduction position by the reproduction time. The system control circuit 10 stores the set desired reproduction time in the memory 3
5 (Step 81), recording / reproduction control circuit 1
5 is instructed to perform a reproduction operation near the desired reproduction time (step 82). Next, the reproduction time calculation routine is called, and from the unit start time (ts _{, u} ) of the unit currently being reproduced,
The reproduction time at the current position is calculated, and a search is performed so that the reproduction time and the set time match (step 83). It is determined whether or not the calculated reproduction time and the set time are equal (step 84), and when they become equal, the time search process is completed.

As described above with reference to FIG. 3, according to the present invention, the head position of the information data piece being reproduced is used as the reference time, and the unit head time read from the reproduction position and recorded on the recording medium. By using the cell start time stored in the memory and the required playback time of the unit, even if the information data piece that has been edited such as chapter setting or deletion after recording is played back from the middle position, It is possible to realize a digital data recording / reproducing device capable of easily calculating the reproduction elapsed time at the reproduction position and performing time search. Further, by including attribute information data indicating the reproduction method of the information data group in the management data and recording or reproducing the information data group based on this attribute information data, one or more information data groups having different attributes can be freely set. It is possible to perform processing such as recording, reproduction and editing.
Furthermore, the management data is collectively recorded in a predetermined management data area, and the information data groups having different attributes are continuously recorded in the predetermined information data area, so that a blank invalid area does not occur in the recording area and a long area is not generated. Time recording becomes possible.

In the above embodiment, the device for handling the DVD-R / W has been described, but the present invention can be applied to the device for handling other disc-shaped recording media and the device such as the semiconductor memory.

[0026]

As described above in detail, according to the present invention, it is possible to freely record, reproduce, edit, etc. one or a plurality of information data groups having different attributes such as an encoding method and an image display. It is possible to do.

[Brief description of drawings]

FIG. 1 is a block diagram schematically showing a configuration of an information recording / reproducing apparatus according to the present invention.

FIG. 2 is a schematic diagram illustrating the structure of data recorded on a disc.

FIG. 3 is a schematic diagram illustrating a data structure and time information recorded on a disc according to the present invention.

FIG. 4 is a schematic diagram showing a data structure and a recording area according to the present invention.

FIG. 5 is a diagram showing attribute information data according to the present invention.

FIG. 6 is a flowchart showing a procedure of a recording operation processing routine according to the present invention.

FIG. 7 is a flowchart showing a procedure of a reproduction operation processing routine according to the present invention.

FIG. 8 is a flowchart showing a procedure of a cell division processing routine according to the present invention.

FIG. 9 is a flowchart showing the procedure of a cell erase processing routine according to the present invention.

FIG. 10 is a flowchart showing the procedure of a reproduction time calculation routine according to the present invention.

FIG. 11 is a flowchart showing the procedure of a time search routine according to the present invention.

[Explanation of symbols]

2,4 A / D converter 3,5 encoder 8 multiplexer 10 System control circuit 15 Recording / playback control circuit 17 recording media 19 recording / playback head 22 Demultiplexer 23,25 decoder 24,26 D / A converter 30 Operation part 35 memory

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[Procedure amendment]

[Submission date] May 31, 2002 (2002.5.3)
1)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

Information recording apparatus and information recording method

Continued front page    F-term (reference) 5D044 AB05 AB07 BC04 CC04 DE03                       DE43 DE44 DE49 DE53 EF05                       GK08                 5D110 AA17 AA19 AA27 AA29 DA03                       DA06 DB03 DB13 DC16 DE01

Claims (4)

[Claims] 1. An information recording apparatus for recording information data in an information data area of a recording medium and recording management data of the information data in a management data area of the recording medium, the recording method comprising recording the data on the recording medium. Means and a recording control means, wherein the recording control means adds new management data to the existing management data and records the attribute data when the attribute information data indicating the reproduction method of the information data does not exist. Characteristic information recording device. 2. The information recording apparatus according to claim 1, wherein the recording control unit determines whether the attribute information data of the information data is already in the management data, and if the attribute information data already exists, the same attribute information is present. A recording / reproducing apparatus characterized by overwriting management data including data, and additionally recording to new existing management data if it does not exist. 3. A recording method of recording information data in an information data area of a recording medium and recording management data of the information data in a management data area of the recording medium, the method comprising recording the information data, It is characterized by comprising a step of judging whether or not the attribute information data indicating the data reproducing method exists, and a step of adding new management data to the existing management data and recording it if it does not exist. Information recording method. 4. The information recording method according to claim 3, wherein if the attribute information data of the information data already exists in the management data, the management data including the same attribute information data is overwritten. Information recording method.