KR20000007385A - Method for generating after-recorded audio management information of rerecordable recoding media - Google Patents

Abstract

PURPOSE: A method for generating after-recorded audio management information is to generate management information for managing an after-recorded audio data when performing the after-record of an audio data after recording a still picture to a REWRITABLE recording media. CONSTITUTION: A method for generating an after-recorded audio management information comprises the steps of: (S11,S13) identifying whether input after-recorded audio attribute is different from a prewriteed audio attribute; (S15) completing a record of the prewriteed after-recorded audio recording assemblage and generating a new management information region of the after-recorded audio; and (S17,S19) recording an after-recorded audio attribute inputted in the management information and forming a new after-recorded audio recording assemblage. Since the after-recorded audio data is grouping according the attribute and the attribute data is recorded to a certain region, record and reproduction of the after-recorded audio data are effectively performed.

Description

How to create audio recording information for rewritable recording media

The present invention relates to a method of generating management information of a rewritable recording medium, and more particularly, to record a still picture on a rewritable recording medium and then record audio data related to the still picture. A method for generating management information for managing post-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.

Record the still image using the above-described method, and then record the audio data to generate the post-record audio data linked to the still image, or change the existing pre-recorded audio data by changing the existing audio data linked to the still image. [Hereinafter, original audio data recorded in association with a still image at the time of initial recording is referred to as "audio data", and audio data recorded after recording of a still image is recorded as an after-recorded audio. It will be referred to as data.

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. The one-file management method is to manage audio recording data as a single file together with still images and audio data. The two file management method is a method of managing still images and audio data as one file, and pre-recorded audio data as another file.

As the two-file management scheme, various schemes have been proposed, one of which grouping a predetermined number of sequentially recorded audio data recorded in one group into a VOB, which is a bob recognition code for each bob. In addition to allocating a (VOB ID), there is a method of managing a post-record audio data by assigning a recognition code to each post-record audio data (hereinafter, referred to as "recognition code assignment method"). In another two-file method, a group of sequential-recorded audio data recorded sequentially is grouped into a group of bobs (VOB), and a bob identification code (VOB ID) is assigned to each bob. A method of managing the audio recording data using the same code as the recognition code of the original bob belonging to the still image linked with the recording audio data as the identification code of each recording audio data (hereinafter, referred to as "identification code tracking method"). Is called). In addition, as another two-file method, all of the sequential recorded audio data recorded sequentially are grouped into one bob without any grouping, and a recognition code is assigned only to each of the narration audio data without the bob recognition code. A method of managing audio data (hereinafter referred to as "single bob method") and the like have been proposed.

In the two-file management method and the original file management method as described above, continuous research on how to efficiently manage the post-record data is required.

Accordingly, the present invention was created to meet the above demands, and when recording still images on a rewritable recording medium, the management information can be efficiently generated to manage audio data for still images to be recorded. It is an object of the present invention to provide a method for generating audio recording information of a rewritable recording medium.

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.

4 is a conceptual diagram illustrating a method of separately managing still images and original audio, and audio recording data;

5 is a conceptual diagram illustrating a structure of a navigation system in the method of FIG. 4;

FIG. 6 is a conceptual diagram illustrating a structure of the original bobbin illustrated in FIG. 5;

FIG. 7 shows an example of a data format of the still image original bob general information area shown in FIG. 6;

FIG. 8 is a conceptual diagram illustrating a structure of an audio recording Bobby shown in FIG. 5;

FIG. 9 shows an example of a data format of a post-record audio bob general information area shown in FIG. 8;

FIG. 10 is a conceptual diagram illustrating an example of a structure of an audio recording region shown in FIG. 8;

FIG. 11 is a conceptual diagram illustrating an example of a structure of an original map area illustrated in FIG. 6;

FIG. 12 is a conceptual diagram illustrating another example of the structure of the post-record audio map area shown in FIG. 8;

FIG. 13 is a conceptual diagram illustrating a method of integrating and managing still images and original audio, and audio recording data; FIG.

14 is a conceptual diagram illustrating a structure of a navigation system in the method of FIG. 13;

FIG. 15 is a conceptual diagram illustrating an example of the data format of the original Bobby shown in FIG. 14;

FIG. 16 is a block diagram of an apparatus in which a method for generating post-record audio management information of a rewritable recording medium according to the present invention is implemented.

17 is a flowchart illustrating an embodiment of a method for generating post-record audio management information 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

According to the present invention, a method for generating post-recording audio management information of a rewritable recording medium according to the present invention is a method of recording / managing post-audio on a rewritable recording medium. A first step of generating management information distinguished from management information of a corresponding video / audio recording assembly; And a second step of recording the attribute of the late-record audio in the generated management information.

In the method for generating post-recording audio management information of a rewritable recording medium according to the present invention as described above, it is confirmed whether the attribute of the input post-audio is different from the attribute of the previously recorded audio, The recorded post-record audio recording set is completed, a new post-record audio management information area is created, a property of post-audio inputted in the area-generated management information is recorded, and the input post-audio is recorded and a new post A record audio record assembly is formed. Then, the attribute of the post-record audio is recorded in the generated management information.

Hereinafter, exemplary embodiments of a method for generating post-recording audio management information of a rewritable recording medium according to the present invention will be described in detail with reference to the accompanying drawings.

5 and 6 illustrate still image AV file information tables, still image AV file information, and still image bobbins employed in a two-file management method to which the method for generating post-record audio management information of a rewritable recording medium according to the present invention is applied. The structure of the still image / audio aggregate playback information), the still image bob (VOB (still image / audio aggregate)) stream information, and the original AV map.

As shown in Fig. 5, 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 original bobbin regions S_O_VOBI # 1 to S_O_VOBI # n are managed as one file, and the post-record audio bobbin regions S_AR_VOBI # 1 to S_AR_VOBI # n are also managed as another file. .

As shown in FIG. 6, 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. In the still image bob general information area S_O_VOBIGI, as shown in FIG. 7, the bob recognition code (VOB_ID), the start address of the bob (VOB_ST_ADR), the number of video parts (V_Ns), the number of audio parts (A_Ns), and the like. The data is recorded. The still image bob stream information area (S_O_VOB_STI) is an area in which data about the property of the bob is recorded. The video property area (Original V_ATR) in which video property data is recorded and an audio property area (Original) in which audio property data are recorded. A_ATR). Further, 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 the 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. Is done. The post-record audio map area AR_MAP is composed of a plurality of post-record audio maps AR_MAP # 1 to AR_MAP # n in which information about one post-record audio, which is a basic object of the post-record audio bob, is recorded.

In the " recognition code assignment method ", which is an example of a two-file management method having a navigation data structure as described above, a post-lock bob general information area employed in the method for generating post-record audio management information of a rewritable recording medium according to the present invention. (S_AR_VOBIGI) and the post-record audio map AR_MAP # i are as follows.

As shown in FIG. 9, the post-lobe bob general information area (S_AR_VOBIGI) includes a bob recognition code (AR_VOB_ID) of the post-record audio, a start address of the post-record audio bob (AR_VOB_ST_ADR), the number of post-record audio (AR_Ns), and the like. In addition to the data, attribute data (AR_ATR) for the audio recording is recorded. Here, the Bob recognition code (AR_VOB_ID) of the post-record audio should not have the same thing in the post-record audio bobbin area (S_AR_VOBI # i), and the start address (AR_VOB_S_ADR) of the bob is included in the still picture AV file measured in sector units. As a relative address, this is the start address of the post audio block.

In addition, as shown in FIG. 10, the post-record audio map AR_MAP # i includes a recognition code AR_ID of the post-record audio, a playback time of the post-record audio AR_PB_TM, the size of the post-record audio AR_SZ, and the like. Is recorded. Here, the identification code AR_ID of the late rock audio should not have the same thing in the one rock audio map AR_MAP # i.

A feature of the method of generating post-record audio management information of a rewritable recording medium according to the first embodiment of the present invention, which is applied to the "recognition code assignment method" having the above-described navigation data structure, is characterized by S_AR_VOBIGI) has attribute data (AR_ATR) for audio recording.

In the first embodiment of the present invention, when the audio property is changed during recording of the audio recording audio data, a new audio recording audio bobbin is generated and a predetermined number of audio recording audio data having the same property recorded afterwards are grouped into one bob. Can be managed. Therefore, even if the audio property is changed, for example, after audio is written to a device that supports post-lox MPEG audio of audio data and then audio is written to a device that supports AC3, the audio property is changed. Record the data on the post-mortem general information area (S_AR_VOBIGI). Accordingly, it is possible to reproduce the recording medium based on the recorded audio attribute.

Next, the method for generating post-record audio management information of the rewritable recording medium according to the second embodiment of the present invention, which is applied to the "recognition code tracking method", which is an example of the two-file management method having the navigation data structure as described above. Since the recognition code for the bob of the post-record audio is used in the "recognition code tracking method", the same code as the recognition code of the original bob belonging to the still image linked thereto is used. Is recorded in the original map (O_MAP # i) as shown in FIG. 11. In the present embodiment, the original recording audio attribute (AR_ATR) is recorded together with the identification code (AR_ID) of the recording audio after recording the recording audio data. By recording on the map O_MAP # i, playback is performed based on the late-lock audio attribute data recorded on the original map O_MAP # i during playback of the recording medium. It is.

As a modification of the second embodiment of the present invention, the post-record audio attribute AR_ATR is not recorded in the original map O_MAP # i, but also recorded in the post-record audio map AR_MAP # i as shown in FIG. do.

Next, the characteristics of the method of generating post-recording audio management information of the rewritable recording medium according to the third embodiment of the present invention, which is applied to the "single bob method" which is an example of the two-file management method having the navigation data structure as described above. In the single-vob method, all of the post-record audio data are managed by one bob, and therefore, data on the attributes of the post-record audio are recorded in the post-record audio map AR_MAP # i as shown in FIG. 12. Thus, the recording of the recording audio attribute AR_ATR in the recording audio map AR_MAP # i during recording of the recording audio data, thereby recording the recording audio recorded in the recording audio map AR_MAP # i during playback of the recording medium. Audio recording data is reproduced based on the attribute data.

As a modification of the second embodiment of the present invention, the post-record audio attribute AR_ATR is not recorded in the original map O_MAP # i, but also recorded in the post-record audio map AR_MAP # i as shown in FIG. do.

Next, a method for generating post-record audio management information of a rewritable recording medium according to the fourth embodiment of the present invention applied to the original file management method will be described in detail.

The original file management method manages still image data, original audio data, and post-record audio data as one file as shown in FIG. 13, and the navigation structure in this method is as shown in FIG. That is, as shown in Fig. 14, 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. The still image AV file information areas (S_AVFI # 1, ...) in which information is recorded, wherein the still image AV file information areas (S_AVFI # i) are still image AV file general information areas (S_AVFGI), and a plurality of still images. It consists of the bobbin areas S_VOBI # 1 to S_VOBI # n.

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, and the still image bob general information area S_VOBIGI is As shown in FIG. 15, the bob recognition code (VOB_ID), the start address of the bob (VOB_S_ADR), the number of video parts (V_Part_Ns), the number of valid video parts (Avail_V_Ns), the attributes of the reviews and audio (AR_ATR), and reviews The number of audios (AR_Aud_Ns), the first recording time (VOB_F_REC_TM) of the corresponding bob, and the last recording time (VOB_L_REC_TM) of the corresponding bob are included.

The bobbin identification code (VOB_ID) should not be the same in the still picture AV file, and the start address of the bob (VOB_S_ADR) is a relative address in the still picture AV file measured in sector units and the start address of the AV data of the bob. to be. The number of video parts (still images) (V_Part_Ns) and the number of post-record audios (AR_Aud_Ns) are the number of video parts (still images) and post-recording audios grouped with the corresponding bob, and the maximum allowable for each of them. It is preferable that the number defines 64, for example, or the maximum allowable number is 64 as the sum of these numbers. The number of effective video parts (Avail_V_Ns) is the number of video parts (still images) not deleted in the corresponding bob.

A feature of the method of managing post-record audio data of a rewritable recording medium according to the fourth embodiment of the present invention, which is applied to the original file management method having the navigation data structure as described above, stops data on the attribute of the post-record audio. 15 is recorded in the video bobbin area S_VOBI # i. In the present embodiment, if the attributes of the post-record audio data do not change during recording of the post-record audio data, the still picture bobbin stream information area S_VOB_STI The audio recording attribute AR_ATR is recorded in the still image bobbin region S_VOBI # i using the original audio attribute data recorded in the original audio attribute region A_ATR of the " In addition, when the attribute of the post-record audio data is changed, a new bob is generated and the changed post-record audio attribute AR_ATR is recorded in the still image bobbin area S_VOBI # i. Therefore, playback is performed based on the late-lock audio attribute data recorded in the still image bobbin area S_VOBI # i.

Fig. 16 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. 16 is a rewritable recording according to the present invention. It is possible to apply the method of generating audio management information.

First, referring to the configuration of FIG. 16, 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 in which a file management program is stored, and an FMT area in which a file management table FMT is stored, and a bobbin table is included in the file management table FMT.

In the apparatus of FIG. 16, in the case of recording the audio recording on the recording medium, the control unit 50 can confirm the change of the property of the audio recording which is input according to the user's key input, and the control unit 50 can manage the file management program. If a property is changed according to the new bob, a new bob is generated, and the data of the changed post-record audio property is controlled to be stored in a predetermined area of the bobbin table of the file management table FMT. On the other hand, the control unit 50 stores the data of the attributes of the late rock audio in a predetermined area of the bobbin table of the file management table FMT according to a file management program even when the attributes of the input rock audio are not changed. To control. As the predetermined region, the region described above with reference to FIGS. 9, 11, 12, and 15 may be mentioned. 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 post audio recording mode.

After the audio recording is recorded on the recording medium as described above, when the recording medium is played back, the control unit 50 performs a playback control operation while the file management table stored in the recording medium is read out and stored in the memory M1. Will be performed. At this time, when the post-record audio is played back, the controller 50 plays the post-record audio based on the attribute of the post-record audio recorded in a predetermined area of the bobbin table of the file management table FMT.

Next, a method of generating post-recording audio management information of a rewritable recording medium according to the present invention will be described in detail with reference to the flowchart of FIG.

First, when the audio post-recording mode is set by the user, the controller 50 checks this and performs data recording control (step S11). Subsequently, the controller 50 checks whether the property of the first input audio is different from the property of the most recently input audio (that is, whether the property of the audio has changed).

If it is determined in step S13 that the audio attribute has changed, the controller 50 generates a new bobbin in the bobbin table of the file management table FMT stored in the FMT area by using a file management program stored in the FMP area. The changed audio attribute data is recorded in a predetermined area of the bobbin table of the file management table FMT (step S15).

Thereafter, the control section 50 confirms whether the audio post-recording mode is terminated by the user (step S21), and if not, returns to the step S13 described above and performs the control operation of the above-described step S13 in accordance with the subsequent audio data input. Do this. On the other hand, if it is confirmed in step S21 that the audio post-recording mode has ended, data stored in the FMT area of the memory M1 is recorded on the recording medium (step S23), and the control operation ends.

On the other hand, if it is confirmed in step S13 that the audio property does not change, it is determined whether the number N of still images and post-record audio recorded in the current bob exceeds a predetermined set value K (S17). When the process proceeds to step S15 described above, the control operation of step S15 or less is performed. On the other hand, if it is not exceeded, the attribute data of the currently recorded audio recording is recorded in a predetermined area of the bobbin table of the file management table FMT (step 19), and the process proceeds to step S21.

According to the method for generating post-record audio management information of a rewritable recording medium according to the present invention as described above, the post-record audio data is recorded by grouping the post-record audio data according to its attributes and recording the attribute data in a predetermined area. It is an excellent invention that can efficiently manage recording and playback.

Claims (7)

In a rewritable recording medium, Re-recording of the audio recording data having management information distinguished from the management information of the video / audio recording assembly to which the still image corresponding thereto belongs, and having an area for recording attribute information of the audio recording data. Possible recording media. The method of claim 1, And an area for recording the attribution information is provided in management information for managing audio recording audio data in groups. The method of claim 1, And an area for recording the attribution information is provided in the management information for each of the audio recording data. The method of claim 1, And an area for recording the attribution information is provided in management information for a still image in the video / audio recording assembly, which is associated with the corresponding post-record audio data. A method of recording / managing post audio on a rewritable recording medium, A first step of generating management information distinguished from management information of a corresponding video / audio recording assembly corresponding to post audio recording; And And a second step of recording an attribute of said late-lock audio in said generated management information. The method of claim 5, A third step of checking whether an attribute of the input post audio is different from that of the previously recorded audio; A fourth step of completing the recording of the previously recorded audio recording aggregate according to the result of the confirmation, and generating a new audio recording information management area; And And a fifth step of recording the attribute of the post audio input in the region-generated management information and recording the input post audio to form a new post-record audio recording assembly. How to create audio management information. A method of recording / managing post audio on a rewritable recording medium, When recording the post audio, checking the attribute of the post audio to be recorded; And Recording the checked attribute of the rewritable recording medium comprising recording the checked attribute in an audio attribute area previously reserved in the management information of the corresponding video / audio recording assembly corresponding to the recorded post audio. Way.