KR20000008066A - Data recording method for rerecordable recording media - Google Patents

Abstract

PURPOSE: A data recording method for a REWRITABLE recording media is to records a still picture in a REWRITABLE recording media, after-record an audio data related to the still picture, and record the still picture and the after-recorded audio DAT. CONSTITUTION: A data recording method for a REWRITABLE recording media comprises the steps of: (S11-S13) dividing a region for recording a still picture and an after-recorded audio in a REWRITABLE recording media, and securing the divided region; and (S14-S19) successively recording the still picture and after-recorded audio to the secured region according to a type of a recording data. Since a reproduction control information (navigation information) to the recording data is identically established with two file method, a file assignment information of a file entry is not increased and a navigation structure is simple.

Description

How to record data on rewritable recording media

The present invention relates to a data recording method of a rewritable recording medium, and more particularly, when a still picture is recorded on a rewritable recording medium and the audio data related to the still picture is recorded. And a method for recording an image and said recorded audio data (hereinafter referred to as "after-recorded audio data").

Optical discs are becoming more common as CDs become more popular, and DVD (Digital Versatile Disc) standards are becoming more expected. Optical discs include CD-Rs and DVD-Rs that can be written once, as well as CD-ROMs and DVD-ROMs for playback purposes. It is becoming. In addition, the working group's activities for the unified standard of DVD-RAM capable of recording and reproducing are currently in progress.

Here, since rewritable DVD-RAM, DVD-RTRW, and the like are large-capacity recording media, users record various movie pictures or still pictures, and also record audio data of still pictures. When a moving picture or a still picture is recorded, information for later indexing and reproducing is generated together with the recording of the picture and recorded in the reproduction control information (navigation information) file of the recording medium.

The reproduction control information file has a structure as shown in FIG. 1, wherein the dual still image bob (VOB) information field S_BOBI # i and the cell information field Cell # i are as described above. Each time one dynamic image or a still image is recorded, it is generated and inserted into the reproduction control information file. The generated reproduction control information file is read at the time of reproduction and the contents thereof are all stored in the memory, and then the stored memory By using the playback control information of the image or the still image corresponding to the item to be requested to be retrieved from the recording medium and reproduced.

However, when a still image having a small size is recorded on a recording medium instead of a dynamic image having a large capacity, a large number of still images are recorded. For example, about 60,000 or more still images are recorded on a 4.7 GByte recording medium. If only still images are recorded on the recording medium, the amount of information generated for playback control and indexing becomes very large. . The size occupied by the two information fields (still image bob information field and cell information field) generated each time recording of one still image (or audio data recorded in association with it) is shown in FIG. 1. Since 84 bytes (= S_VOB (36 bytes) + 2 * Cells (2 * 24 bytes)), including the above, the amount of information of the two fields generated under the above example conditions is about 5040 Kbytes (= 84 * 60000). ) FIG. 2 illustrates a form in which bob information and cell information are generated and associated with each other when one still image is generated as described above.

Therefore, the size of the reproduction control information file of the recording medium recording only the still image is at least 5 MByte, and when reproducing, the contents of the corresponding file are read out and stored in the memory, and then the desired still image is searched and reproduced according to the contents. Not only does it have a problem of having a large memory for storing the contents of the reproduction control information file, but also limits the size of the memory for storing the contents of the reproduction control information file to, for example, 512 KByte. In this case, there is a problem that the number of still images recorded on the recording medium should be limited.

Therefore, in order to solve this problem, the inventors of the present invention generally fix a property of an image (e.g., image size, resolution, audio quality, etc.), take a plurality of still images, and then change the property. Focusing on the tendency to change, a method of grouping according to the property of the still image and the maximum number of still images is proposed.

That is, in this method, when recording still images, the playback control information and index information are not generated for each still image, and as shown in FIG. According to the identity of the audio attribute associated with the still image, a plurality of still images share control information for the reproduction, and group and record the index information of the still image in association with the shared reproduction control information (ie, the same attribute). The location information for indexing each still image having the same information is grouped and recorded in association with the shared playback information), thereby reducing the amount of playback control information and index information generated by recording a large number of still images on a large-capacity recording medium. In addition, a small amount of resources of the device allows access and playback of numerous still images.

Here, the one still image may be composed of only one video part or one video part and one audio part depending on whether or not an audio signal is inserted during capturing (capture). In addition, one still image / audio collection, VOB (Video OBject), is composed of a group of still images having the same property, and the property is such as image size (aspect ratio) and resolution. Video properties and audio properties such as audio quality (sampling ratio).

In the above-described scheme, a plurality of still images (Video Part #i) having the same property in the still image / audio recording set reproduction information (VOBI; hereinafter referred to as "Bobby") field (S_BOBI # i) and the original recording are linked. The recorded information about the audio data (Audio Part #i) is recorded, and the information includes an address on the recording medium for each still image and audio. As the address information, only the start address of the first still picture (Video Part #i) is used as an absolute address, and the size of the address map is reduced by using the size as a relative address for each still picture and audio.

As a method of managing the audio recording data generated as described above, a one file management method and a two file management method have been proposed. As shown in FIG. 4, the one-file management method manages the audio recording data as a single file together with the still image and the audio data. As shown in FIG. 5, the two-file managing method is a method of managing still images and audio data as one file, and recording audio data as another file.

6A to 6C are navigation data employed in the two-file management method, and include still image AV file information table, still image AV file information, still image bobbin (VOBI; still image / audio group playback information), and still image bob (VOB). The still picture / audio aggregate) stream information and the structure of an original AV map.

As shown in Fig. 6A, the still image AV file information table S_AVFIT includes a still image AV file information table information area S_AVFITI, in which information about a still image AV file information table, is recorded, and a still image AV file information. The still image AV file information areas S_AVFI # 1 are recorded, and the still image AV file information area S_AVFI # i is a still image AV file general information area S_AVFGI, and a plurality of still image original bobbins. Areas S_O_VOBI # 1 to S_O_VOBI # n and a plurality of post-record audio bobbin areas S_AR_VOBI # 1 to S_AR_VOBI # n. Here, the still image and the original audio data managed by the still image original bobbin areas S_O_VOBI # 1 to S_O_VOBI # n are managed as one file, and the post-record audio bobbin areas S_AR_VOBI # 1 to S_AR_VOBI # n Audio recording data managed by) is managed as another file.

The still image original bobbin area S_O_VOBI # i includes a still image bob general information area S_O_VOBIGI, a still image bob stream information area S_O_VOB_STI, and an original AV map area O_AV_MAP as shown in FIG. 6B. The original AV map area O_AV_MAP is composed of a plurality of maps O_MAP # 1 to O_MAP # n in which information about one video part (including audio parts), which is a basic object of the bob, is recorded.

The post-record audio bobbin area S_AR_VOBI # i includes a post-record audio bob general information area S_AR_VOBIGI, a post-record audio bob stream information area S_AR_VOB_STI, and a post-record audio map area AR_MAP as shown in FIG. 6C. Is done. The post-record audio map area AR_MAP includes a plurality of post-record audio maps AR_MAP # 1 to AR_MAP # n in which information on one post-record audio, which is a basic entity of the post-record audio bob, is recorded.

7A to 7C are navigation data employed in the original file management method, which are still image AV file information tables, still image AV file information, still image bobbins (VOBI; still image / audio group playback information), and still image bobs (VOB). The still picture / audio aggregate) stream information and the structure of an original AV map.

As shown in Fig. 7A, the still image AV file information table S_AVFIT includes a still image AV file information table information area S_AVFITI, in which information about a still image AV file information table, is recorded, and a still image AV file information. The still image AV file information areas (S_AVFI # 1, ...) are recorded, and the still image AV file information area (S_AVFI # i) is a still image AV file general information area (S_AVFGI), and a plurality of still image bobbin areas. (S_VOBI # 1 to S_VOBI # n). Here, in the original file method, the still image bobbin areas S_VOBI # 1 to S_VOBI # n are not distinguished from the still image and the post-record audio, which do not distinguish the still images and the post-record audio recorded sequentially. This is because grouping is performed on a per-vob basis according to the attributes of video and audio (a still image and a post-recording audio can exist simultaneously in one bob), and playback information about the bob is recorded in the bobbin area. In the original file system, still images, original audio data, and post-record audio data managed by the still image bobbin regions S_VOBI # 1 to S_VOBI # n are managed as one file.

The still image bobbin area S_VOBI # i includes a still image bob general information area S_VOBIGI, a still image bob stream information area S_VOB_STI, and an AV map area AV_MAP as shown in FIG. 7B. The AV map area AV_MAP is a map in which information about one still image video part (which may include an original audio part), which is a basic object of a bob, is recorded or information about audio recording data is recorded (MAP # 1). -MAP # n). That is, in the original file method, map regions are not separately managed for still images and post-record audio data, and a map is generated for each of the still images and post-record audio data according to the recording order. Managed by the AV map area AV_MAP.

As described above, when comparing the navigation structure of the original file method and the two-file method, the navigation structure is simpler than the two-file method because the original file method does not separately manage still images and audio recording data. (Not uniform), and there is a risk of complicated management of the file.

FIG. 8 is a conceptual diagram illustrating a conventional still image and original audio, and a method of managing audio recording data.

As shown in FIG. 8, when recording audio data simultaneously when shooting still images, "V1, A1", "V2, A2", "V5, A5", "V6, A6", "V9, A9" , Still image and audio data are recorded continuously like "V11, A11". When shooting still image without audio recording, only still image is recorded like V3, V4, V7, V12, V13. In the case of the recording, the audio recording data (A2 ', A1', A6 ', A3', A8 ', A5', A7 ', V2, V1, V6, V3, V8, V5, V7, V10, V9 and V11) A10 ', A9', A11 ') are recorded at the recording position.

FIG. 9A is a conceptual diagram of a file entry for recording information on each file. The file entry is an allocation descriptors area for recording information on sections in which a file is continuously recorded on a recording medium. The file allocation information area includes at least one position field and at least one length field. Here, when one file is continuously recorded on the recording medium, only one position and length field is recorded in the file allocation information area, and when one file is recorded separately in N areas on the recording medium, In the allocation information area, N position and length fields are recorded, respectively. The position information is a physical address on a recording medium, which is a start address of a contiguous area in one file, and is expressed by, for example, 4 bytes. The length information (length) is length information from the positional information of the continuous area in the one file recorded on the recording medium to the end of the area.

Next, as shown in FIG. 8, when still images and audio recording data are recorded on the recording medium, how file allocation information of the file entry is recorded in the original file type and the two file type, respectively. Explain.

First, in the original file method, as shown in FIG. 8, since the still image and the post-record audio data are separately recorded in two areas on the recording medium, as shown in FIG. 10A, the file allocation information of the file entry is first displayed. For the first area (V1, A1, ... A5 ', A7'), the start address Add1 and the length (Size 1) of the area are recorded as position information and length information, respectively, and the second area. For (V10, V11, ... A9 ', A11'), the start address Add2 and the length (Size 2) of the area are recorded as position information and length information, respectively.

On the other hand, in the two-file method, since the still image and the original audio data are managed as one still image file, and the post-record audio data is managed as another file, each of the still image files and the post-record audio file is assigned to a file entry. File allocation information is created. That is, when still images and audio recording audio data are recorded on a recording medium as shown in FIG. 8, file allocation information of a file entry for a still image file is displayed as shown in FIG. 10B. The start address (Ad1, Ad3, Ad5, Ad7, Ad9, Ad11) and the length (S1, S3, S5, S7, S9, S11) of each still image area are recorded as position information and length information, respectively. The file allocation information of the file entry for the post-record audio file is shown in FIG. 10C as a starting address (Ad2, Ad4, Ad6, Ad8, Ad10) of each post-record audio region, and the length (for each post-record audio region). S2, S4, S6, S8, and S10 are recorded as position information and length information, respectively.

As described above, when comparing the structure of the file entry with respect to the original file method and the two file method, the two file method has a file entry structure compared to the original file method because the two file method separately manages still images and audio recording data. There is a problem that it becomes complicated and increases the data amount of the file entry.

As described above, the conventional one-file method does not separately manage still images and audio recording data, so that the navigation structure is not simple (not uniform) compared to the two-file method, and thus file management becomes complicated. On the other hand, the conventional two-file method separates and manages still images and audio recording audio data, resulting in a complicated file entry structure compared to the original file method, and increasing the data amount of the file entry.

Therefore, in the original file system, it is desired to develop a data recording method of a rewritable recording medium that can simplify (uniform) the navigation structure and thus simplify the management of a file.

In addition, in the two-file system, there is a demand for developing a data recording method of a rewritable recording medium capable of reducing the data amount of a file entry.

Accordingly, the present invention was created to meet the above demands, and the data amount of a file entry in a two-file method in which a still image, an original audio, and a post-record audio are separated into two files and managed in a rewritable recording medium. An object of the present invention is to provide a data recording method of a rewritable recording medium capable of reducing the number of times.

In addition, the present invention provides a data recording method of a rewritable recording medium capable of simplifying a navigation structure in an original file method of managing still images, original audio, and post-recording audio as a single file in a rewritable recording medium. There is another purpose.

1 is a table showing data for managing all data recorded on a recording medium;

2 is a diagram illustrating a process of generating data for managing the same with the conventional still image recording.

3 is a conceptual diagram illustrating a still image index information structure for explaining a method of managing by grouping a still image according to the related art.

FIG. 4 is a conceptual diagram illustrating a method of integrating still images, original audio, and audio recording data into a single file (one file). FIG.

FIG. 5 is a conceptual diagram illustrating a method of managing still images and original audio, and post-record audio data in different files (two files);

6A is a conceptual diagram illustrating a structure of navigation data for a still image in the method of FIG. 5;

FIG. 6B is a conceptual diagram showing the structure of the original bobbin shown in FIG. 5;

FIG. 6C is a conceptual diagram showing the structure of the late rock audio bobbin shown in FIG. 5;

7A is a conceptual diagram illustrating a structure of navigation data for a still image in the method of FIG. 4,

FIG. 7B is a conceptual diagram showing the structure of the original bobbin shown in FIG. 4;

FIG. 7C is a conceptual diagram illustrating the structure of an audio recording Bobby shown in FIG. 4;

8 is a conceptual diagram illustrating a method of managing still images and original audio, and post-record audio data.

9A and 9B are diagrams for explaining a file entry and file allocation information that are used in a rewritable recording medium to which the present invention is applied.

FIG. 10A is a diagram showing a record list of file allocation information of a file entry when the original file method is applied in the recording structure of the still image and the original audio and the post-record audio data shown in FIG. 8;

10B and 10C show a file of a file entry for a file managing a still image and original audio when the two-file method is applied in the recording structure of the still image and original audio shown in FIG. 8 and the post-record audio data. A diagram showing a record list of allocation information and a record list of file allocation information of a file entry for a file managing audio recording audio;

11 is a view for explaining a data recording method in a two-file method in the data recording method of a rewritable recording medium according to the present invention;

12A and 12B are diagrams showing a record list of file allocation information of a file entry when the two-file method is applied in the data recording structure shown in FIG.

FIG. 13 is a view for explaining a data recording method in an original file method in a data recording method of a rewritable recording medium according to the present invention; FIG.

FIG. 14 is a diagram showing a record list of file allocation information of a file entry when the two-file method is applied in the recording structure of the data shown in FIG.

15 is a block diagram of an apparatus in which a data recording method of a rewritable recording medium according to the present invention is implemented,

16 is a flowchart of an embodiment of a data recording method of a rewritable recording medium according to the present invention.

17 is a flowchart of another embodiment of a data recording method of a rewritable recording medium according to the present invention.

※ Explanation of code for main part of drawing

10: optical pickup 20: analog signal processing unit

30: digital signal processing unit 40: A / V processing unit

50: control unit M1 to M3: memory

A data recording method of a rewritable recording medium according to the present invention for achieving the above object, in a method for managing a still image and post-recording audio on a rewritable recording medium as a file, on the recording medium A first step of separately securing an area in which still images and audio recordings are to be recorded; And a second step of sequentially recording in the secured area according to the type of record data.

In addition, the data recording method of a rewritable recording medium according to the present invention is a method of managing a still image and a post-record audio in two files in a rewritable recording medium, when a predetermined data recording area is filled. Searching for an empty space equal to or greater than a size; And a second step of recording the inputted data by securing the searched empty space.

Hereinafter, preferred embodiments of a data recording method of a rewritable recording medium according to the present invention will be described in detail with reference to the accompanying drawings.

11 is a view for explaining a data recording method in a two-file method in the data recording method of a rewritable recording medium according to the present invention.

As shown in the figure, a plurality of recorded areas [RA1, RA2, RA3; In the case where an area recorded by a movie picture or the like] exists, the data recording method in the two-file method according to the present invention is as follows.

First, a sufficient area (for example, 500 sectors or more) for recording a still image is secured, and a still image is recorded in that area. That is, the still images ("V1, A1", V2, ..., V13) are sequentially recorded from the position Ad_1 in FIG.

If the recording audio recording mode is set by the user during the recording of such still images, an area of a predetermined size (N; for example, 10 sectors, 100 sectors, etc.) is secured as an area for recording the recording sound recordings, and the Record audio data. That is, in FIG. 11, an area [area size Sz_2> N] located between the Ad_2 position and the recording area RA2 is searched to secure the post-record audio recording area, and the post-record audio data (from the start position Ad2) is searched for. A2 ', A1', ..., A7 ', A10') are recorded sequentially.

After that, if the reserved audio data area is filled with the secured old audio data area, the area for recording subsequent audio recordings is searched for an area larger than a predetermined size (N; for example, 10 sectors, 100 sectors, etc.). In this case, an area (J in FIG. 11) having a size less than or equal to N is ignored. That is, in Fig. 11, a blank area is secured to the post-record audio recording area from the position Ad_3, and the post-record audio data A9 'and A11' are sequentially recorded from the start position Ad_3.

According to the data recording method of the two-file method according to the present invention described above, when the still image and the post-record audio are recorded on the recording medium as shown in FIG. 11, the file allocation information area of the file entry for the still image file is shown in FIG. 12A. As shown in Fig. 2, the start address Ad_1 of the still image area and the length Sz_1 of the recording area of the still image are recorded as position information and length information. The file allocation information of the file entry for the post-record audio file is shown in FIG. 12B as the start address (Ad_2, Ad_3) of each post-record audio area and the length (Sz_2, Sz_3) of the recording area of each post-record audio. Are recorded as position information and length information, respectively.

As is apparent from the above, according to the data recording method in the two-file method according to the present invention, the file allocation information of the file entry can be significantly reduced as compared with the conventional method. Further, in the present invention, by searching for an area N of a predetermined size or more as an area in which the old recording audio data is to be recorded, the file is prevented from being split into small pieces as the old recording audio data is recorded in an area of too small a size. The increase in file allocation information of file entries is also prevented.

FIG. 13 is a view for explaining a data recording method in an original file method in a data recording method of a rewritable recording medium according to the present invention.

As shown in the figure, a plurality of recorded areas [RA1, RA2; In the case where an area recorded by a movie picture or the like is present, the data recording method in the original file method according to the present invention is as follows.

First, an area having a sufficient size M (for example, 500 sectors or more) for recording a still image is secured, and a still image is recorded in that area. That is, the still image is sequentially recorded from the position Ad_1 in FIG. 13.

If the recording audio recording mode is set by the user during the recording of such still images, an area of a predetermined size (N; for example, 10 sectors, 100 sectors, etc.) is secured as an area for recording the recording sound recordings, and the Record audio data. That is, the audio data is recorded sequentially from the position Ad_2 in FIG. 13.

After that, when the still image data is filled in the secured still image region, a region of a predetermined size (M (for example, 500 sectors, etc.) or more as a region to record the still image is searched for, and then, at the position Ad_3 in FIG. A blank area (size M '? M) between the recording areas RA2 is secured as a still picture recording area, and the still pictures are sequentially recorded from the start position Ad_3.

On the other hand, if the reserved audio data area becomes full in the secured recording audio data area, the area for recording subsequent recording audio is searched for an area of a predetermined size (N; for example, 10 sectors, 100 sectors, etc.). In Fig. 13, an area of a predetermined size (N) of the blank areas from the position Ad_4 is secured as the post-recording audio recording area, and the post-recording audio data is sequentially recorded from the start position Ad_4.

According to the data recording method of the original file method according to the present invention, when the still image and the post-record audio are recorded on the recording medium as shown in FIG. 13, since the still image and the post-record audio are managed as one file, The recording areas of the video and the post-record audio are two areas in total (that is, an area having a length from the start address Ad_1 to (Sz_1 + Sz_2 + Sz_3) and an area having a length from the start address Ad_4 to (Sz_4). ] Accordingly, the start address (Ad_1; Ad_4) and the length (Sz_1 + Sz_2 + Sz_3; Sz_4) of the recording area of the still image are recorded in the file allocation information area of the file entry as position information and length information. .

As described above, when the recording area of the still image and the recording area of the post-record audio data are separately set and recorded in the original file method, playback control information (navigation information) for the recorded data is the same as in the two-file method. It is effective to construct the structure as shown in Figs. 6A to 6C.

As is apparent from the above, according to the data recording method of the original file method according to the present invention, it is possible to simplify the navigation structure without increasing the file allocation information of the file entry as compared with the conventional method.

Fig. 15 shows a configuration of a recording / player of a recording medium for recording signals on an optical disc recording medium and reproducing the recording signal, wherein the recording / reproducing device of Fig. 15 is rewritable according to the present invention. The data recording method of the recording medium can be applied.

First, referring to the configuration of FIG. 15, the optical pickup 10 records a signal on the optical recording medium OD and detects the signal therefrom; An analog signal processor 20 for transforming reproduction high frequency signals into digital data to convert the data to be recorded into analog data; A digital signal processor (30) for outputting a control signal to the optical pickup (10) according to the decomposition and synthesis of digital data, ECC block coding and decoding, and the decoding result of the data; An A / V processor 40 for decoding and outputting the input audio / video data (hereinafter referred to as 'A / V data') and encoding the input audio / video signal into A / V data; A controller 50 for controlling the component according to navigation data and a user request for reproducing a signal; And a plurality of memories M1, M2, and M3 for temporarily storing data generated in each signal processing process.

The memory M1 includes an FMP area storing a file management program and an FMT area storing a file management table FMT, and the file management table FMT includes file entries of each file.

In the apparatus of Fig. 15, in the case of recording still image and post-record audio on the recording medium, in the original file method, the controller 50 secures the still image recording area and the post-record audio recording area, and is first inputted on the recording medium. The physical start address of the recorded still image is recorded in the file allocation information of the file entry stored in the file management table (FMT) as position information, and the size of the secured still image recording area and the recorded audio recording area are obtained. In the file allocation information of the file entry as length information.

On the other hand, in the original file system, the controller 50 secures a still image recording area. The still image area which is recorded on the file allocation information of the still image file entry stored in the file management table (FMT) as the position information, and the physical start address of the still image recorded on the recording medium. Is recorded in the file allocation information of the still image file entry as length information. Thereafter, when the post-record audio data is recorded, the control unit 50 secures the post-record audio recording area of a predetermined size or more, and positions the physical start address of the post-record audio recorded on the recording medium for the first time. As information (position), it is recorded in the file allocation information of the post-record audio file entry stored in the file management table (FMT), and then the size of the post-record audio area to be recorded as the length information (length) of the post-record audio file entry. Record in file allocation information.

Thereafter, the controller 50 records the data stored in the FMT area of the memory M1 on the recording medium at the end of the recording mode.

Next, the data recording method of the rewritable recording medium according to the present invention will be described in detail with reference to the flowchart of FIG.

First, when the still image recording mode is set by the user, the controller 50 checks this and performs data recording control (step S11). Subsequently, the controller 50 secures an area sufficient for recording still images on the recording medium as a still image recording area and records still images in the secured areas (steps S12, S13).

Then, the control unit 50 positions the start address of the recorded still image in the file allocation information of the file entry for the still image file in the file management table (FMT) stored in the FMT region by using a file management program stored in the FMP region. The information is recorded as position and the size on the recording medium for the recorded still image is recorded as length information (step S14).

Subsequently, the control unit 50 confirms whether subsequent recording data is input (step S15), and confirms whether the input recording data is audio recording audio data (step S16). As a result of the checking in step S16, when it is not the audio recording audio data (that is, the still image), the input recording data is sequentially recorded in the secured still image recording area (step S17), and the file management table (FMT ), The size on the recording medium for the recorded still image is updated in the file allocation information of the file entry for the still image file (step S18).

Subsequently, the controller 50 checks whether empty space remains in the set still image recording area (step S18A), and if it does not remain, searches for an empty space of the recording medium to secure an area of a predetermined size or more as a new still image recording area. (Step S18B).

Thereafter, the control section 50 confirms whether the audio post-recording mode is terminated by the user (step S19), and if not, returns to the above-described step S15 and performs the control operation of the above-described step S15 in accordance with subsequent recording data input. Do this. On the other hand, if it is confirmed that the above step S19 ends, the data stored in the FMT area of the memory M1 is recorded on the recording medium (step S20), and the control operation ends.

On the other hand, if it is confirmed in step S16 that the audio recording data is late, the controller 50 secures a blank area having a predetermined size or more as a recording audio recording area to record the audio recording audio data on the recording medium. The audio recording data is recorded in the area (steps S21 and S22).

Thereafter, the controller 50 uses the file management program stored in the FMP area to start the address of the recorded audio recorded in the file allocation information of the file entry for the post-record audio file in the file management table FMT stored in the FMT area. Is recorded as position information, and the size on the recording medium for the recorded late-record audio data is recorded as length information (step S23).

Subsequently, the control unit 50 confirms whether subsequent recording data is input (step S24), and confirms whether the input recording data is an audio recording data (step S25). As a result of checking in step S25, if it is not the late rock audio data (i.e., it is a still image), the process proceeds to the above step S17, while in the case of the late rock audio data, the inputted in the reserved rock audio recording area is entered. The record data is recorded sequentially (step S26), and the size on the recording medium for the recorded rock audio is updated in the file allocation information of the file entry for the still image file in the file management table FMT (step S27).

Subsequently, the controller 50 checks whether empty space remains in the set post-recording audio recording area (step S28), and if there is no remaining space, searches for the empty space of the recording medium and converts an area of a predetermined size or more into a new still image recording area. After securing (step S29), it progresses to step S19 mentioned above.

Next, the data recording method of the rewritable recording medium according to the present invention will be described in detail with reference to the flowchart of FIG.

First, the controller 50 checks this when the still image recording mode is set by the user and performs recording control of the data (step S31). Subsequently, the controller 50 converts the region M of a size M sufficient for recording still images on the recording medium into a still image recording region, and a predetermined size (N; M> N) subsequent to the secured still image recording region. The area is reserved as an audio recording area. Thereafter, the controller 50 records still images in the secured still image recording area (steps S32, S33).

Thereafter, the control unit 50 uses the file management program stored in the FMP area as the position information as the start address of the still image recorded in the file allocation information of the file entry in the file management table FMT stored in the FMT area. And record the size on the recording medium for the recorded still image as length information (step S34).

Subsequently, the control unit 50 confirms whether subsequent recording data is input (step S35), and confirms whether the input recording data is an audio recording data (step S36). As a result of the checking in step S16, when it is not the audio recording audio data (that is, the still image), the input recording data is sequentially recorded in the secured still image recording area (step S37), and the file management table (FMT In the file allocation information of the file entry, the size on the recording medium for the recorded still image is updated (step S38).

Thereafter, the control section 50 confirms whether the audio post-recording mode is terminated by the user (step S39), and if not, returns to the above-described step S35, and the control operation of the above-described step S35 in accordance with the subsequent recording data input. Do this. On the other hand, if it is confirmed that the above step S39 ends, the data stored in the FMT area of the memory M1 is recorded on the recording medium (step S40), and the control operation ends.

On the other hand, if it is confirmed in step S36 that it is post-record audio data, the control part 50 records post-record audio data in the post-record audio area | region secured by the said step S32 (step S41).

Thereafter, the controller 50 uses the file management program stored in the FMP area to position the start address of the recorded recording audio in the file allocation information of the file entry in the file management table FMT stored in the FMT area. And record the size on the recording medium for the recorded late-record audio data as length information (step S42), and proceed to step S39 described above.

On the other hand, in the embodiment of the data recording method in the original file method according to the present invention, a sufficient area is first secured at the time of recording still images, and then a region of a predetermined size (M) is selected from the still images. The recording area is set, and the next predetermined size (N; M > N) is set as a post-record audio area to record still images and post-record audio data. However, in the present invention, if a recording of a still image is recorded in the middle of recording a still image first and then recording a still image sequentially during recording of the still image in that area, the recording area of a subsequent still image In order to ensure that the region of the predetermined size (N; M> N) is set as a post-recording audio recording region from a position separated by a predetermined size (M) from the position where the still image is last recorded, the post-recording audio data May be recorded sequentially.

According to the data recording method of the rewritable recording medium according to the present invention as described above, in the original file system, when the recording area of the still image and the recording area of the post-record audio data are separately set and recorded, the recording data Since the reproduction control information (navigation information) for the file can be constructed in the same manner as the two-file method, the navigation structure can be simplified without increasing the file allocation information of the file entry. Further, according to the data recording method in the two-file method according to the present invention, the file allocation information of the file entry can be significantly reduced as compared with the conventional method.

Claims (7)

A method for managing still images and post-record audio on a rewritable recording medium in one file, A first step of separately securing an area in which a still image and an after-record audio are to be recorded on the recording medium; And And a second step of sequentially recording in the secured area according to the type of record data. The method of claim 1, The first step is a data recording method of a rewritable recording medium, characterized in that a recording area of a still image and an audio recording area are secured adjacent to each other. Sequentially recording an input still image; And when the first post-record audio recording request is made during the sequential recording, securing the post-record audio region at a predetermined margin from the recorded still image recording region. A rewritable recording medium in which still images and audio recording audio data are divided in a single file, and information for reproducing the still image and audio recording audio data is divided. A method for managing still images and post-record audio on a rewritable recording medium in two files, A first step of searching for an empty space of a predetermined size or more when the previously filled data recording area is full; And And a second step of recording the inputted data by securing the searched empty space. The method of claim 5, And the input data is audio recording audio data. The method of claim 5, The data recording method of the rewritable recording medium, characterized in that the input data is a still image.