KR100448453B1 - Rewritable optical disc recorded still pictures and apparatus and method for reproducing the still pictures - Google Patents

Abstract

In the present invention, in the case of recording still images on a large-capacity rewritable recording medium, information for each reproduction is shared according to the identity of the acquired still image, and each still image having the same attribute is indexed. The location information for the recording is grouped in association with the shared information to be shared, so that the still image of the rewritable recording medium which reduces and records the amount of the playback control information and the index information generated by recording a large number of still images on a large recording medium. The present invention relates to a rewritable recording medium on which still images are recorded by a method of generating and recording management data, and to an apparatus and method for reproducing a still image, each of which is recorded without generating reproduction control and index information for each still image. Attributes at the time of capturing still images, or the speed of audio recorded to be reproduced in conjunction with the still images Accessing and playing back still images by allowing a plurality of still images to share control information for reproduction, and grouping and recording index information of still images in association with the shared reproduction control information By reducing the amount of data for the recording medium, a large amount of resources of the recording / reproducing apparatus of the recording medium can access and reproduce a large number of still images.

Description

Rewritable optical disc recorded still pictures and apparatus and method for reproducing the still pictures}

The present invention provides a rewritable recording medium on which a still image is recorded by a reproduction control information of a still picture recorded on a rewritable recording medium, and a method for generating data for indexing the same; The method relates to a method of recording a still image on a large capacity rewritable recording medium (hereinafter, abbreviated as " recording medium "). Playback information generated by recording a large number of still images on a large-capacity recording medium by recording the location information for sharing each other according to the sameness and indexing each still image having the same attribute in association with the shared playback information. And by reducing the amount of index information, a number of still images can be accessed and reproduced by a small resource of the device. A rewritable recording medium on which a still image is recorded by a method of generating / recording still image management data of a rewritable recording medium, and an apparatus and method for reproducing the still image.

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 are proposed. It is becoming.

Here, since rewritable DVD-RAM, DVD-RTRW, and the like are large-capacity recording media, users can use them for recording various dynamic images or still images, and record dynamic images or still images. Then, information for later indexing and reproducing is generated together with the recording of the image and recorded in the reproduction control information (navigation information) file of the recording medium.

The playback control information file has a structure as shown in FIG. 1, in which a double video (VOB) video field and a cell information field are recorded as one dynamic image or a still image as described above. And a reproduction control information file generated and recorded is read at the time of reproduction, the contents thereof are all stored in the memory, and then the reproduction request is performed using the reproduction control information of the stored memory. The dynamic image or the still image corresponding to the item is 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 can be recorded. For example, about 60,000 or more still images can be recorded on a 4.7 GByte recording medium. When the recording medium is recorded only as a still image, 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 when recording one still image (or audio data recorded so as to be reproduced in association with it) is shown in FIG. Since 84 bytes including the reserved area [= S_VOBI (36 bytes) + 2 x Cells (2 x 24 bytes)], the amount of information of the two fields generated under the above-mentioned conditions is about 5040 Kbytes ( = 84 x 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 the reproduction is performed, 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. In addition, there is a problem that a large-capacity memory is provided only for storing the contents in the reproduction control information file, and if the size of the memory for storing the contents of the reproduction control information file is limited 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 despite the sufficient storage capacity of the recording medium.

Therefore, the present invention was created to solve the above problems, and when recording a still image on a rewritable recording medium, rewriting is possible to minimize the amount of generation of still image management data by sharing information for reproduction and indexing thereof. It is an object of the present invention to provide a rewritable recording medium on which a still image is recorded by a method and apparatus for generating / recording still image management data of a recording medium, and an apparatus and method for reproducing the still image.

1 is a table showing the structure of a reproduction control data (navigation data) file for managing all data recorded on a recording medium;

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

3 is a conceptual diagram illustrating an embodiment of a still image management data structure recorded on a rewritable recording medium on which still images are recorded by a still image management data generation / recording method of a rewritable recording medium according to the present invention;

FIG. 4 is a diagram showing an embodiment of a data format of the recording collective reproduction information (VOBI) shown in FIG.

FIG. 5 is a diagram showing an embodiment of a data format of the recording set reproduction order information (cell) shown in FIG. 3;

6A and 6B are diagrams showing examples of data formats of the video attribute V_ATR and the audio attribute A_ATR shown in FIG. 4;

7 is a block diagram of an apparatus for reproducing a rewritable recording medium on which still images are recorded by a still image management data generation / recording method of a rewritable recording medium according to the present invention;

8 is a flowchart of an embodiment of a still image management data generation / 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

In accordance with an aspect of the present invention, there is provided a still image management data generation / recording method of a rewritable recording medium. The method of recording a still image on a rewritable recording medium includes: receiving a plurality of still images to be input; 1 step of recording on the recording medium; And grouping into one still image aggregate according to the identity of the signal attributes of the still images, generating management information corresponding to the grouped still image aggregate, and recording the same on the recording medium. It is characterized by.

The still image management data generation / recording apparatus of a rewritable recording medium according to the present invention is a device for recording a still image and an audio signal recorded to be reproduced in association with a rewritable recording medium. Means for recording still images of and an audio signal associated therewith on the recording medium; And means for grouping into one recording set according to the identity of signal properties of the still images and / or the interlocked audio signal, and recording management information corresponding to the grouped recording sets into the cross media. Characterized in that it comprises a.

In the method and apparatus for generating / recording still image management data of a rewritable recording medium according to the present invention, which is constructed and constructed as described above, the captured still images are sequentially recorded, and the still images that are sequentially recorded are collected as a still image set of a predetermined unit. As a condition for classification, the playback management information corresponding to the still image collection is classified according to the identified condition by checking the attribute of the still image and the maximum number of still images constituting the still image collection [VOB]. Create and record. Further, in the present invention, the captured still image and the audio signal corresponding to the still image are recorded so that the still image can be reproduced in association with the captured still image. VOB)] is identified as a condition for classifying the attributes of the still image and audio and the maximum number of still images constituting the aggregate, and the reproduction management information corresponding to the aggregate is generated and recorded according to the identified condition. .

Hereinafter, exemplary embodiments of a still image management data generation / recording method and apparatus of a rewritable recording medium according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a conceptual diagram illustrating an embodiment of a still image management data structure for explaining a method of generating / recording still image management data of a rewritable recording medium according to the present invention, which is abbreviated as PGC. The original PGC and the user defined PGC consist of a plurality of movie cells and still cells. And, video object information [Video OBject Information; Hereinafter abbreviated as "VOBI", the Video Object [Video OBject; As information for reproducing "hereinafter referred to as" VOB ", each bobbin S_VOBI # 1 and S_VOBI # 2 includes a video part for a plurality of still pictures constituting the bob. An address map is formed in which addresses of Video Part # 1 to Video Part #S and Audio Part # 1 to Audio Part #S are recorded. The bob is divided into video parts (Video Part # 1 to Video Part #S) for still images and audio parts (Audio Part # 1 to Audio Part #S) which are played in association with each video part. The audio parts (Video Part # 1 to Video Part #S) are first recorded in the order of input of still images, and then played back in association with the respective Video Parts (Video Part # 1 to Video Part #S). (Audio Parts # 1 to Audio Part #S) are recorded separately in the order of input of still images, and also in the address maps of Bobbins (S_VOBI # 1 and S_VOBI # 2), the address recording area of the video parts and the respective The address recording areas of the audio parts recorded to be reproduced in association with the video part are separated.

Here, the one still image may be made of only a video part according to whether or not an audio signal is inserted at the time of capturing (capture), and may be made of a video part and an audio part recorded to be reproduced in association with the video part. The bob according to the present invention is composed of a group of still images having the same attribute, and the attribute is divided into a video attribute and an audio attribute. As the video attribute, as shown in Fig. 6A, a video compression mode (MPEG-1, MPEG-2, etc.), TV system (525/60, 625/50, etc.), aspect ratio (4: 3, 16) : 9, etc.), Analogue Protection System (APS); ON / OFF etc.], video resolution (720x480, 704x480, 352x480, 352x240 etc.) etc. are mentioned. In addition, the audio attributes include audio code mode (Dolby MPEG-1, 2, linear PCM audio, etc.), quantization / dynamic range control (DRC), frequency, as shown in FIG. 6B. (Such as 48 kHz), the number of audio channels (one channel (mono), two channels (stereo), two channels (dual mono), etc.), and the like.

However, in the grouping according to the above properties, considering that the user can fix the above properties and shoot with the same properties continuously, too many images may be recorded in one VOB. Problems can arise with controls such as (search). Accordingly, the present invention is to reduce the amount of management data generated by grouping according to the properties of the still image and the maximum number of still images, and to provide ease of control. Here, the maximum number of still images constituting one VOB may be determined to be 32, 64, 128, and the like. The attribute of the image may be determined by a user's key input or the like when shooting through a photographing apparatus such as a digital camera or editing a still image through a recording / playback apparatus of a recording medium capable of recording a still image on a recording medium. It can be changed.

As can be seen from the still image index information structure of FIG. 3, the present invention can simplify the management data structure of still images by grouping still images having the same property and managing them as one bobbin (V0BI).

FIG. 4 is a diagram showing an example of a data format of the VOBI shown in FIG. 3, wherein the bobbin S_VOBI # i of a still image includes still image bob general information S_VOBGI and still image bob stream information S_VOB_STI. ) And a bobbin part (PART_OF_VOBI) consisting of video part information (V_PARTI) and audio part information (A_PARTI).

The still image bob general information (S_VOBGI) includes a bob recognition code (VOB_ID), a bob type (VOB_TY), a bob playing time (VOB_PB_TM), a bob recording time (VOB_REC_TM), and a still image count (STILL_PIC_Ns). The number may be allocated to two bytes as the number of images grouped into one bob. The still image bob stream information S_VOB_STI may include a video attribute V_ATR having a data format as shown in FIG. 6A and an audio attribute A_ATR having a data format as shown in FIG. 6B. have.

The video part information (V_PARTI) is a start address (V_PART_S_ADR # 1) of the video part and size information (V_PART_SZ # 1 to V_PART_SZ # S) that stores the size of each video part in the generated bob grouped according to the attribute. Consists of. The audio part information A_PARTI is a start address A_PART_S_ADR # 1 of the audio part and size information (A_PART_SZ # 1 to A_PART_SZ # S) in which the size of each audio part in the generated bob is grouped according to the attribute. It consists of). Here, when the size information A_PART_SZ # i of the i-th audio part is "0", it means that there is no audio part of the i-th still image.

FIG. 5 is a diagram illustrating an embodiment of a data format of cell information shown in FIG. 3, wherein the cell information CI # i indicates whether the cell is a cell for a still image or a movie. Type C_TY and still picture cell information S_CI. The still image cell information S_CI may include a bob recognition code VOB_ID, a cell play time C_PB_TM, an index number of a start image indicating an index of a start image selected for playback, and an index number of a final image among the selected images. Index number (PIC_E_N) of the last image to display the video, video stop time (PIC_STILL_TM) to display the time to hold (stop) after playback for each selected video, and video playback times to display the playback time of each selected video (PIC_PB_TM # 1 to PIC_PB_TM # L), item text number (IT_TXT_N), and thumbnail-picture number (THMNL_N). Here, if the index number PIC_S_N of the start image is K and the number of still images selected for reproduction is L, the index number PIC_E_N of the final image is “K + L-1”.

As described above, the inventors of the present invention show that when the still images are grouped with the same attribute and managed by one VOBI, the data of the bobbin is significantly reduced as compared to the case where one still image is managed by one bobbin. Confirmed. Specifically, when ten still images are recorded, in the past, 360 bytes are required for 10 bobbins, but according to the present invention, 74 bytes are required for bobbins. Therefore, the data amount of the bobbin according to the present invention is significantly reduced to about 21% of the data amount of the conventional bobbin.

FIG. 7 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. 7 is a rewritable recording according to the present invention. The still image management data generation / recording method of the medium can be applied.

First, referring to the configuration of FIG. 7, an optical pickup 10 for recording a signal on the optical recording medium OD and detecting the signal therefrom; An analog signal processing unit 20 for transforming the reproduction high frequency signal into a digital signal and converting the data to be recorded into an analog signal; A digital signal processor (30) for outputting a control signal to the optical pickup (10) according to decomposition and synthesis of digital data, error correction (ECC) block encoding and decoding, and data decoding result; 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 in accordance with reproduction control data (navigation data) for reproducing a signal and a user request; 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 (FMP) is stored, and an FMT area in which a file management table (FMT) is stored, and the file management table (FMT). The BOB information table as shown in FIG. 4 and the cell information table as shown in FIG. 5 are recorded in units of VOBs, which are still image collections recorded on a recording medium.

In the apparatus of FIG. 7, when recording a still image on a recording medium, the controller 50 controls to record an input still image and an audio signal reproduced in association with the recording medium on the recording medium OD. At this time, according to a user's key input, the controller 50 may check the property change of the input still image (or an audio signal recorded to be reproduced in association with the still image), and the controller 50 may manage the file when the property is changed. The input and recorded still images before the attribute change by the program are grouped into one VOB, and the generation of the VOBI as shown in FIG. 4 is completed for the grouped VOB. It records in the bobbin table of the FMT area of M1. On the other hand, the control unit 50 is a predetermined number of input still images recorded in the state that the properties of the still image (or audio signal recorded to be reproduced in conjunction with the still image) by the user's key input is not changed (eg For example, when 64 pieces are input, the still images recorded up to that time and the audio signals recorded to be reproduced in association with them are grouped into one bob and the bobbins for the grouped bobs (VOB) are input. The generation of the VOBI is completed and recorded in the bobbin table of the FMT area of the memory M1. In addition, even when the power is turned off while the still image is input, the controller 50 groups the still images that have been input up to that time and the audio signals recorded to be reproduced in association with them into one VOB. The generation of bobbins VOBI for the grouped bobs VOB is completed and recorded in the bobbin table of the FMT area of the memory M1, and the reproduction control data (navigation data) recorded in the memory M1 is recorded. It may be controlled to record in the management data area of the recording medium.

Next, when reproducing the still image recorded on the recording medium at the request of the user, the controller 50 controls the index number of the start image in the cell information table as shown in FIG. 5 stored in the FMT area by the file management program. After reading (PIC_S_N) and the index number (PIC_E_N) of the final image, the image stop time (PIC_STILL_TM) and the image reproduction times (PIC_PB_TM # 1 to PIC_PB_TM # L) are read, and then the read cell information and the corresponding cell information are read. The still images stored in the recording medium are sequentially reproduced and controlled according to VOBI.

Next, a still image management data generation / 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 sets the number of inputs of the still image to 1 in the internal register (step S11), and controls to record the input still image on the recording medium. (Step S13),

Thereafter, the controller 50 generates a corresponding bobbin table in the FMT region of the memory M1 by using a file management program, so that the still image stored in the input image is the first image of the corresponding bobbin VOB, and thus the video part start address V_PART_S_ADR # 1, the audio part start address (A_PART_S_ADR # 1), the video part size (V_PART_SZ # 1) and the audio part size (A_PART_SZ # 1) record the addresses of video parts and audio parts stored on the recording medium and their sizes. (Step S15).

Next, the controller 50 controls whether the properties of the still image currently input and recorded by the user's key input (or the property of the audio signal recorded to be played back in association with the still image) are recorded in the same VOB. The controller 50 checks whether the property of the still image is changed in comparison with the property of the still image (or the property of the audio signal recorded to be played back in association with the still image) (step S17). ) Determines whether the input number N of still images stored in the internal register is larger than a predetermined set value K (for example, 64) (step S23). If it is determined in step S23 that the control unit 50 is large, the control unit 50 proceeds to the control routine of step S19 which will be described later. If it is determined that it is not large, the control unit 50 determines whether the power is turned off (step S25).

If it is determined in step S25 that the power is turned off, the controller 50 proceeds to the control routine of step S19, which will be described later, and if it is determined that the power is not turned off, the controller 50 sets the number of inputs of the still image stored in the internal register by one. After increasing (step S27), the process returns to the above-described step S13 to repeat the control operation of the above-described step S13. At this time, since the controller 50 is not the first still image of the VOB that is newly grouped, the still image newly input and recorded in step S13 is only the size data of the video part and the audio part of the still image in step S15. Create and record in the corresponding bobbin table.

On the other hand, when it is determined that the video or audio property of the still image is changed by the determination result in step S17, the control unit 50 may select previously selected still images other than the currently input still image as one bob ( VOB), and record the number of still images (STILL_PIC_Ns) of the corresponding bobbin table by the file manager as the number minus one from the number of inputs (N) of still images stored in the internal register, and generate the corresponding bobbin table. Control to complete At the same time, the controller 50 generates a cell table as shown in FIG. 5 corresponding to the generated bobbin and writes the cell table to the FMT region of the memory M1. On the other hand, the controller 50 deletes the size of the video part and the audio part for the still image currently input and recorded in the previous Bobby table in the step S15, while the memory M1 Create a new BOBY table in the FMT area to record the video part at the video part start address (V_PART_S_ADR # 1), audio part start address (A_PART_S_ADR # 1), video part size (V_PART_SZ # 1), and audio part size (A_PART_SZ # 1). The video and audio addresses and their sizes stored therein are recorded (step S19). Thereafter, the controller 50 controls to move and store the entire recording medium management data including the completed corresponding bobbin table on the recording medium (step S21), and then ends recording of the bobbin which is reproduction information for one bob. .

According to the rewritable recording medium on which a still image is recorded by the still image management data generation / recording method of the rewritable recording medium according to the present invention as described above, and the playback apparatus and method of the still image, A plurality of still images share control information for reproduction according to the commonality of attributes of capturing each recorded still image or attributes of recorded audio to be reproduced in association with the still image without generating playback control and index information. And grouping and recording the index information of the still image in association with the shared reproduction control information, thereby reducing the amount of data for accessing and reproducing the still image, thereby reducing the amount of resources of the recording / reproducing apparatus of the recording medium. There is an effect that can be accessed and playback of a large number of still images.

Claims (25)

A first area in which a plurality of still images are recorded; And And a second area in which management information corresponding to the still image aggregate grouped into one aggregate is recorded according to the identity of the signal attributes of the still images. The method of claim 1, And the identity of the signal attribute is determined by comparing a signal attribute of an input still image with a signal attribute of a still image which has been input and recorded just before. The method of claim 1, And a still image grouped into the still image aggregate, the number of still images being limited to a predetermined number. The method of claim 1, And the management information corresponding to the one still image aggregate includes attribute information for indicating a signal attribute of the still image aggregate. The method of claim 1, And the management information corresponding to the one still image aggregate includes position information for indicating a start position of the still image recording aggregate. The method of claim 1, And the management information corresponding to the one still image recording assembly includes size information for indicating a recording size of each still image constituting the still image collection. The method of claim 1, And the management information corresponding to the one still image recording assembly includes number information for indicating the number of each still image constituting the still image collection. A first area in which a plurality of still images and an audio signal linked thereto are recorded; And And a second area in which management information corresponding to a recording collection grouped into one collection is recorded according to the identity of the signal properties of the plurality of still images and / or the interlocked audio signal. Possible recording media. The method of claim 8, Wherein the identity of the signal attribute is determined by comparing a signal attribute of successive still images and / or an audio signal with a still image and / or audio signal attribute recorded immediately before. The method of claim 8, And a still image and / or audio grouped into the one recording set is limited to a predetermined number. The method of claim 8, And the management information corresponding to the one recording set includes attribute information for indicating signal attributes of the still image and / or audio signal. The method of claim 8, And the management information corresponding to the one recording assembly includes location information for indicating a start position of the recording assembly. The method of claim 8, And the management information corresponding to the one recording aggregate includes size information for indicating a recording size of the still image and / or audio signal. The method of claim 8, And management information corresponding to the one recording aggregate includes number information for indicating the number of the still image and / or audio signal. An area in which a plurality of input still images and an audio signal linked thereto are recorded; And And a second region in which still image aggregates grouped into one aggregate and management information corresponding to each of the audio signals linked to the still image aggregates are separately recorded according to the identity of signal attributes of the still images. Rewritable recording medium characterized by. The method of claim 15, And the management information includes position information for indicating a start position of the still image assembly or a start position of an audio signal. The method of claim 15, And the management information includes size information for indicating a recording size of each still image or audio signal constituting the still image collection. The method of claim 15, The audio signal interlocked with the still image assembly is separately recorded from the still image. delete delete delete delete delete A first area in which a plurality of still images are recorded; And A method of reproducing a rewritable recording medium comprising a second area in which management information corresponding to a still image collection grouped into one collection is recorded according to the identity of signal properties of the still images. Reading management information from the second area to determine a position of a specific still image in the still image collection; And And searching for the corresponding still image according to the determined position information, and reproducing the same according to the attribute information recorded in the management information. A first area in which a plurality of still images are recorded; And An apparatus for reproducing a rewritable recording medium, comprising: a second area in which management information corresponding to a still image collection grouped into one collection is recorded according to the identity of signal properties of the still images; , Means for reading management information from the second area to determine a position of a particular still image in the still image collection; And And retrieving the still image according to the determined position information, and reproducing the image according to the attribute information recorded in the management information.