KR100579455B1 - How to protect still images on rewritable recording media - Google Patents

Abstract

The invention stops recording of a rewritable recording medium which allows recording still pictures on the rewritable recording medium and assigning a protection function to prevent inadvertent loss of important still pictures among them. It relates to a video protection method. According to the present invention, when recording an input still image on a recording medium, setting and recording erasure prevention information in the information area of the still image, or selecting a still image recorded after recording still images, and selecting the still image Deletion prevention information may be set and recorded in the information area, and the setting and deletion prevention information recorded may be canceled. In the present invention, the deletion prevention information recorded in the information area of the still image is checked in accordance with the deletion request of the user, and whether or not the still image is deleted according to the confirmation result is important. It is an excellent invention that can prevent the loss of still images.

Description

How to protect still images on rewritable recording media

The present invention relates to a data management method of a rewritable recording medium, and more particularly, to recording still pictures on a rewritable recording medium, and to protecting a still image from among them. The present invention relates to a method for protecting a recording still image of a rewritable recording medium.

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, in addition to CD-ROMs and DVD-ROMs for playback purposes, and standard discs such as rewritable CD-RWs, DVD-RAMs, or DVD-RTRWs. It is proposed. In addition, the working group's activities for the unified standard of DVD-RTRW capable of recording and reproducing are currently in progress.

Here, since rewritable DVD-RAM, DVD-RTRW, etc. are large-capacity recording media, users can record various movie pictures or still pictures, and also record audio data of the 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, which reproduces a dual still image / audio recording assembly (VOB (Video OBject)) information field (S_VOBI # i) and a still image / audio recording assembly. As described above, the sequence information (cell) information field Cell # i is generated each time one moving picture or still picture is recorded and inserted into the reproduction control information file. The playback control information file generated and recorded as described above is read out at the time of playback, and the contents thereof are all stored in the memory. You will play it.

By the way, when a still image having a small size is recorded on a recording medium instead of a moving image having a large size, a 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 at each recording of one still image (or audio data recorded in association with it) is a reserved area 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 require that a user fix an attribute of an image (for example, image size, resolution, audio quality, etc.), and then photograph a plurality of still images. Focusing on the tendency to change the attributes, a method of grouping according to the attributes of the still image and the maximum number of the still images was proposed.

That is, in this method, when recording still images, playback control information and index information are not generated for each still image, and as shown in FIG. According to the identity of the associated audio attribute, a plurality of still images control information (that is, still image bob information (S_VOBI # 1, S_VOBI # 2, ...) and still image cell information (Cell # 2, Cell #) for reproduction thereof. 3,…)], and group and record the index information of the still images in association with the shared playback control information (that is, the location information for indexing each still image having the same attribute is linked to the shared playback information). To record a large number of still images on a large recording medium, 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. The process (acess) and playback were to be made.

In the above-described method, 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_VOBI # 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.

After recording a still image using the above-described method, the audio data is recorded to generate a post-record audio data linked to the still image, or a new post-record according to the change of the original audio data [original audio data] belonging to the still image. Audio data can be generated.

As a method of managing the post-record audio data generated as described above, as shown in FIG. 4, the one-file management method of managing the post-record audio data as a single file together with the still image and the original audio data is illustrated. It was proposed by the inventors of the present application. On the contrary, a two-file management method for managing still images and original audio data as one file and managing pre-recorded audio data as another file has also been proposed.

In such management methods, a user can capture (take) and record a still image, and then delete the image by arbitrary (for example, a still image unit or a still image / audio recording aggregate (VOB) unit). Therefore, at present, there is a problem in that the still image cannot be recovered when the user accidentally deletes the important still image recorded.

Accordingly, the present invention has been made to solve the above problems, which allows recording of still images on a rewritable recording medium and then imparting an arbitrary erasure prevention function to important still image (s) among them. It is an object of the present invention to provide a method of protecting a still image on a rewritable recording medium.

According to an aspect of the present invention, there is provided a method of protecting a still image on a rewritable recording medium, the method of recording a still image on a rewritable recording medium. step; And a second step of setting and recording erasure prevention information in the information area of the recorded still image.

The still image recording method of the rewritable recording medium according to the present invention includes: a first step of selecting a still image recorded in the still image protection method of the rewritable recording medium; A second step of setting and recording erasure prevention information in the information area of the selected still image; And a third step of releasing the setting-protected erasure prevention information.

In addition, according to the present invention, a method for protecting a recording still image of a rewritable recording medium is a method of erasing data on a rewritable recording medium, wherein, according to a user's deletion request, erasure prevention information recorded in an information area of the still image. Confirming the first step; And a second step of determining whether to delete the still image according to the confirmation result.

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

4 is a diagram showing the structure of a still picture AV file information table S_AVFIT which can be employed in the audio reproduction designating method of a rewritable recording medium according to the present invention.

As shown in the figure, 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). As shown in FIG. 4, 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.

FIG. 5 is a conceptual diagram showing the structure of an AV (Audio / Video) map shown in FIG. 4, which is composed of a plurality of maps (MAP # 1, MAP # 2, ... MAP # n). (MAP # 1, MAP # 2, ... MAP # n) are classified into two types, one of which is a map for still images with or without original audio (hereinafter referred to as "original map"), The other is a map to the review rock audio data (hereinafter referred to as "post rock audio map"). Since the present invention relates to the original map, only the original map will be described below.

In the AV map, one map (MAP # 1, MAP # 2, ... MAP # n) is allocated to each of the still image or the post-record audio data of the corresponding bob, and each map (MAP # 1, MAP # 2) is assigned. , ... MAP # n) records information on corresponding still image or post-record audio data, respectively.

FIG. 6 is a data format of the original maps MAP # 1, MAP # 2, ... MAP # n shown in FIG. 5, which can be employed in a method for protecting a still image of a rewritable recording medium according to the present invention. It is a figure which shows an Example.

As shown in the figure, the map type information MAP_TY indicates whether the map is for a still image with original audio or a still image without original audio. For example, " 00 " when the type is composed of only still images, and " 01 " for still images with original audio. The post-record audio presence information AR_EXIST is for indicating whether the post-record audio for the still image is recorded.

In addition, the protection flag PRO_FLAG is a key data structure of the present invention, and is intended to protect the still image when a deletion request is made. That is, the protection flag PRO_FLAG is composed of 1 bit, and it is preferable that the protection flag PRO_FLAG is set to "1" when the erasure protection is set for an important still image and "0" when the erasure protection is not set for a normal still image. .

In addition, the video part recognition code (V_PART_ID) indicates a recognition code for the video part of the still image, and the post-record audio bob recognition code (AR_VOB_ID) recognizes a bob in which the post-record audio data for the corresponding still image is grouped. The code indicates the code, and the AR-ID indicates the recognition code of the pre-recorded audio data for the corresponding still picture, and the video part size (V_PART_SZ) and the audio part size (A_PART_SZ) correspond to the still picture. The size of the video part and the audio part is displayed, and the number of audio frames A_F_Ns indicates the number of audio frames for the audio part of the corresponding still image.

7 is a still image / audio recording assembly (VOB), still image / audio recording assembly playback information (VOBI) and still image / in the method for protecting a still image recording method of a rewritable recording medium according to the present invention. It is a conceptual diagram for explaining an example of generation of audio recording set reproduction order information (Cell).

In the figure, the original program chain (original PGC) includes a plurality of movie cells (Cell # 1, Cell # 5, Cell # N) in which playback order information for a movie is recorded, and playback for still images. Still image cells (still Cells) in which the order information is recorded are composed of cells shaded in the drawing, that is, Cell # 2, Cell # 3, Cell # 4, and Cell # 6.

Video OBject Information (Still Image / Audio Record Set Playback Information) is information for reproducing a VOB (Still Picture / Audio Record Set) and includes a plurality of SBs (S_VOBI # 1, S_VOBI # 2, S_VOBI #). 3, ...), and the bobbins are formed one by one corresponding to the one stop cell. The still image bob management program (RTRW_STL.VOB) is a program for managing still images in the unit of a bob, and is composed of a plurality of bobs (S_VOB # 1, S_VOB # 2, S_VOB # 3, ...). It is formed one by one corresponding to the one bobbin. The bob has information on still images Vi having the same properties and original audio Ai associated therewith, and a post-generation generated when the audio data of a previously recorded still image is recorded later. Information on the recording audio data Ai 'is also recorded.

Next, a description will be given of the generation process of the bob, the bobbin and the cell at the time of recording.

When recording audio data at the same time when shooting still images, still and audio data such as "V1, A1", "V2, A2", "V5, A5", "V6, A6", "V9, A9" When recording still images without recording audio continuously, only still images are recorded, such as V3, V4, and V7. When post audio recording is performed, the V2, V1, V6, V3, V8, V5, V7 Like the late-lock audio (A2 ', A1', A6 ', A3', A8 ', A5', A7 '), the late-lock audio is recorded at the recording position. In this way, when the attributes of the still image change during recording of the still image or when the maximum allowable number of still images is exceeded, new bobs, bobbins, and cells are generated.

In the same figure, the shaded still images V8 (V9 and A9) are set to be randomly erased by the user. In the original map for these still images (see FIG. 6), the protection flag PRO_FLAG is an example. Is set to "1". On the other hand, unshaded still images (V1, A1; V2, A2; V3; V4; V5, A5; V6, A6; V7) have not been set by the user. In the original map (see Fig. 6) for the image, the protection flag PRO_FLAG is set to "0", for example.

The deletion protection setting for the still images V8 (V9 and A9) may be performed simultaneously with the recording of the still image or at the request of a user after the recording of the still image. In addition, the delete protection setting may be released at the request of the user.

Next, in the above-described manner, as shown in FIG. 7, the recording operation for the second still image / audio recording assembly S_VOB # 2 will be described in the state where recording of still images and audio recordings is performed. do.

The original map (refer to FIG. 6) for the still images V5, V6, V7, V8, and V9 existing in the bob S_VOB # 2 is sequentially searched, and the protection flag PRO_FLAG of the original map is checked and deleted. Retrieve a protected still image. Thereafter, the post-recorded audio indicated by the still image (V5, V6, V7) that is not protected by deletion and the original audio (A5, A6) linked thereto and the original map of the still image (V5, V6, V7) In FIG. 10, A6 'and A5' present in S_VOB # 3 are deleted.

Subsequently, in consideration of the deleted sizes of the deleted still images V5, V6 and V7, the original audio A5 and A6 and the post-recorded audio A6 'and A5', the deleted bob S_VOB # 2 Changes the start address (VOB_S_ADR) of the bobs (S_VOB # 3, S_VOB # 4, ...) that follow.

When the bob S_VOB # 2 is deleted as described above, as shown in FIG. 8, the bob S_VOB # 2 is a review record associated with the still-protected still images V8 (V9 and A9) and the previous bob S_VOB # 1. Only audios A2 'and A1' remain.

FIG. 9 shows a configuration of a recording / player of a recording medium for recording a signal on an optical disc recording medium and reproducing the recording signal, wherein the recording / reproducing device of FIG. 9 is rewritable according to the present invention. It is possible to apply the recording still image protection method of the recording medium.

First, referring to the configuration of FIG. 9, 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. The file management table FMT includes a cell information table, a bobbin table, and an AV map table. This is included.

In the apparatus of FIG. 9, when recording a still image on a recording medium, the controller 50 may check the change of the attribute of the input still image according to a user's key input, and the controller 50 may determine the attribute according to the file management program. When the change is made, the still image until the change is grouped into one bob to control recording on the recording medium OD, and to record information on the still image currently recorded in the original map table in the FMT region. Control, and also generate the bobbin and cell information for the currently recorded bob. At this time, the controller 50 generates an original map table as shown in FIG. 6, and when the protection against deletion of the still image currently recorded by the user is set, the protection flag PRO_FLAG is set to "1", for example. If the protection is not set, the protection flag (PRO_FLAG) is set to " 0 ", for example.

In the apparatus of FIG. 9, erasure protection may be set later on the still image recorded on the recording medium. In this case, the control unit 50 controls the file management table of the memory M1 according to the user's deletion prevention setting request. In FMT, the original map table of the still image is colored, and the protection flag PRO_FLAG of the original map table is set to "1", for example. In addition, in the apparatus of FIG. 9, the predetermined erasure protection may be released for the still image recorded on the recording medium. In this case, the control unit 50 manages the file of the memory M1 according to the user's request for the erasure prevention. The original map table of the still image is colored in the table FMT, and the protection flag PRO_FLAG of the original map table is updated from, for example, "1" to "0".

In addition, in the apparatus of FIG. 9, when a user requests a deletion for a predetermined still image / audio recording assembly (VOB), the controller 50 controls the corresponding still image in the file management table FMT of the memory M1. Search each original map for the still images in the audio record set (VOB) sequentially, check the protection flag (PRO_FLAG) of the original map, and search for the erased protected still image, Unrecorded still images and original audio linked thereto, and post-recorded audio indicated by the original map of the still images.

Next, a still image recording method, which is an embodiment of a recording still image protection method 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 recording mode is set by the user, the controller 50 checks this and performs recording control of the still image data (step S11). Subsequently, the controller 50 checks whether there is a protection flag setting request for random erasure prevention with respect to the input still image (step S13), and if there is a protection flag setting request, the original information on the still image is recorded. The protection flag PRO_FLAG is set to "1" at the time of generation of the map table (see FIG. 6) (step S15).

Subsequently, the process proceeds to step S17, whereby the controller 50 confirms whether the recording mode of the still image is terminated by the user, and when the control is finished, records the file management table FMT stored in the memory M1 on the recording medium. If the control operation is terminated (step S19), but the data recording mode is not terminated, the controller 50 proceeds to step S11 described above to control the recording operation of the new still image data.

On the other hand, when there is no protection flag setting request as a result of checking in step S13, the controller 50 sets the protection flag PRO_FLAG to "0" when generating the original map table (refer to FIG. 6) for the still image. (Step S21), it progresses to step S17 mentioned above.

Next, another embodiment of the recording still image protection 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 whether the user selects a previously recorded specific still image (step S31), and checks whether there is a user request for setting erasure prevention for the selected still image (step S33). If there is a deletion prevention request by the user in step S33, the controller 50 colors the original map table of the still image in the file management table FMT stored in the memory M1, and the protection flag of the original map table. (PRO_FLAG) is updated and recorded, for example, from "0" to "1". Thereafter, the controller 50 proceeds to step S37 to confirm whether or not the erasure prevention setting mode of the still image is terminated by the user, and when finished, records the file management table FMT stored in the memory M1. If the control operation is terminated (step S39) and the erasure prevention setting mode of the still image is not terminated, the controller 50 proceeds to step S31 described above to check whether a new still image is selected.

On the other hand, if there is no deletion prevention request by the user in step S33, the controller 50 proceeds to step S41 to check whether there is a deletion prevention release request by the user. If there is no deletion prevention request in step S41, the controller 50 proceeds to step S31 and confirms whether a new still image is selected. On the other hand, when there is a deletion prevention release request in step S41, the controller 50 colors the original map table of the still image in the file management table FMT stored in the memory M1, and protects the original map table. The flag PRO_FLAG is updated and recorded from, for example, "1" to "0". Thereafter, the controller 50 proceeds to step S37 to perform a control operation of step S37 or less.

Next, another embodiment of the recording still image protection 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 the deletion request for the predetermined still image recording assembly VOB by the user, proceeds to the deletion mode, and performs deletion control (step S51). Thereafter, the controller 50 reads out the still image / audio recording set reproduction information VOBI from the file management table FMT of the memory M1, analyzes the number of still images, etc., and is present in the still image recording set. Each original map for each still image is sequentially searched (step S53). Thereafter, the controller 50 checks whether the protection flag PRO_FLAG of each original map is set to "1" (i.e., random erasure prevention setting) (step S55), and the still image not set to "1". In step S57, the still image, the original audio data associated with the still image, and the post-record audio data indicated by the original map are deleted (step S57). On the other hand, the delete operation is not performed on the still image in which the protection flag PRO_FLAG of the original map is set to "1" (step S65).

Thereafter, the controller 50 proceeds to step S59 to check whether the record data (still image or post-record audio data) exists in the still image / audio recording assembly VOB, and if it does not exist, the file in the memory M1. In the management table FMT, the reproduction information VOBI and the reproduction order information Cell for the still image / audio recording assembly VOB are deleted.

Subsequently, the controller 50 reproduces the still image / audio recording assemblies subsequent to the deleted still image / audio recording assembly in consideration of the deleted sizes of the deleted still image, original audio and post-recording audio. Each start address is updated in the information VOBI table (step S61).

Next, the control unit 50 proceeds to step S63 to confirm whether or not the deletion mode of the still image is terminated by the user, and when the control unit 50 terminates, the file management table FMT stored in the memory M1 is stored on the recording medium. If the recording operation is terminated (step S65) and the control operation for erasing the still image is not terminated, then the control section 50 proceeds to step S53 where the still image recording collective playback information (selected to be newly deleted by the user) is recorded. VOBI) and the original map belonging to the same, and the control of the above steps is repeated.

On the other hand, the present invention is not limited to the above specific embodiments, it can be implemented by various modifications and modifications within the scope not departing from the gist of the present invention. For example, in the embodiment of FIG. 10, the protection flag is set by checking whether or not the protection flag is set according to the user's request for each still image to be recorded. However, the present invention sets the protection flag setting mode. If requested, the protection flag may be automatically set for all still images input thereafter. In addition, in the above embodiment, the original file management method has been described as an example. However, it will be readily understood by those skilled in the art that the present invention is applicable to a two-file management method.

According to the still image protection method of a rewritable recording medium according to the present invention as described above, by recording still images on the rewritable recording medium, and then providing an erasure prevention function for the important still image (s) of them, It is an excellent invention that can prevent the deletion of a still image due to a user mistake.

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 still images by grouping them;

4 is a conceptual diagram showing the structure of a still image AV file information table;

FIG. 5 is a conceptual diagram showing the structure of an AV map shown in FIG. 4;

FIG. 6 is a diagram illustrating an example of a data format of the map illustrated in FIG. 5 and may be employed in a method for protecting a still image of a rewritable recording medium according to the present invention.

FIG. 7 is a view illustrating the generation of a recording assembly VOB, recording assembly reproduction information VOBI, and recording assembly reproduction sequence information Cell in a method for protecting a still image of a rewritable recording medium according to the present invention; FIG. Is a conceptual diagram to illustrate

FIG. 8 is a conceptual view illustrating an example of deleting a recording assembly VOB in the example shown in FIG. 7;

9 is a block diagram of an apparatus in which a method of protecting a still image of a rewritable recording medium according to the present invention is implemented;

FIG. 10 is a flowchart illustrating an embodiment of a still image recording method in a recording still image protection method of a rewritable recording medium according to the present invention;

11 is a flowchart illustrating an embodiment of a still image protection setting and releasing method in a recording still image protection method of a rewritable recording medium according to the present invention;

12 is a flowchart illustrating an embodiment of a method of deleting a recorded still image in the method for protecting a recording still image 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

Claims (6)

In the still image recording method of the recording medium, A first step of recording an input still image on a recording medium; And And a second step of recording and managing identification information indicating whether or not deletion is prevented in the information area in the map information corresponding to the recorded still image. The method of claim 1, The recording of the identification information of the second step is a protection method of a still image, characterized in that according to the individual request of the user for each recorded still image. The method of claim 1, The recording of the identification information in the second step is for all subsequent still images according to the user's mode setting. In the still image protection method of the recording medium, A first step of selecting a recorded still image; And a second step of changing the protection flag indicating whether or not to delete the corresponding still image in the original map information corresponding to the selected still image to record and manage the recorded still image. In the data erasing method of the recording medium, A first step of searching and confirming a protection flag indicating whether or not to delete the corresponding still image in the original map information corresponding to the still image requested to be deleted by the user; And And a second step of determining whether or not to delete the still image according to the verification result. In the recording medium, A first recording area in which still images are recorded; And a second recording area in which original map information on which a protection flag indicating whether or not the still image is prevented from being recorded is recorded.