KR100301007B1 - Recording medium storing thumbnail data and management information in real time and recording reproduction method and device thereof - Google Patents

Abstract

PURPOSE: A recording medium storing thumbnail data and management information in real time is provided to record thumbnail data and management information in real time when recording A/V data in real time, and to immediately reproduce thumbnail in real time. CONSTITUTION: A video encoder(106) and an audio encoder(108) compress and encode video data and audio data temporarily stored in the first video buffer(102) and the first audio buffer(104), and store the compressed video and the audio data to the second video buffer(110) and the second audio buffer(114), respectively. If a user requests to store thumbnail information, the video encoder(106) and the audio encoder(108) store an encoded intra picture in a thumbnail buffer(112). If thumbnail group data is stored in the thumbnail buffer(112), the video encoder(106) and the audio encoder(108) apply the read thumbnail group data to an MPEG encoder(116). The MPEG encoder(116) multiplexes the thumbnail group data to store the data in a disk. If a mode is a recording mode, the MPEG encoder(116) multiplexes the read thumbnail group data with A/V data read from the second video encoder and the second audio buffer(114), and outputs an encoded MPEG system layer stream. If the mode is a playback mode, the MPEG encoder(116) outputs an encoded MPEG stream.

Description

Recording medium, recording and reproducing method and apparatus for storing thumbnail data and management information therefor in real time

The present invention relates to a recording medium and a recording and reproducing method and apparatus for storing thumbnail data and management information therein in real time. In particular, the present invention relates to thumbnail data when recording audio and / or video (A / V) data in real time. The management information also relates to a method and apparatus for recording and reproducing in real time, and a recording medium storing the thumbnail data and management information therefor.

Conventionally, a DVD (Digital Versatile Disc) disc, for example, in DVD-ROM Video, compresses A / V data recorded on a disc at predetermined time intervals into small screens, and simultaneously displays a plurality of small screens on one screen. The menu is configured with a thumbnail to enable the user to easily search for the contents recorded on the disk. However, when using a menu, complicated navigation data and information are required, and such navigation information has a problem in that it is difficult to simultaneously record A / V data in real time.

In order to solve the above problems, it is an object of the present invention to provide a recording medium for storing thumbnail data and management information for constituting thumbnails in real time.

Another object of the present invention is to record the thumbnail data and management information for it in real time when recording A / V data on a recording medium such as a DVD in real time, and without additional A / V data manipulation when playing A / V data. To provide a way to play thumbnails in the form of a menu.

It is still another object of the present invention to provide a method of recording thumbnail data and management information therefor in a predetermined area according to a recording / reproducing mode and reproducing thumbnail data according to the management information.

Still another object of the present invention is to record in real time the thumbnail data and management information for recording the A / V data on a recording medium such as a DVD, and to further manipulate the A / V data when reproducing the A / V data. There is provided a device for reproducing thumbnails without menus.

In order to achieve the above object, a recording medium according to the present invention is a recording medium in which audio and / or video (A / V) data is recorded: thumbnails of group units displayed on one screen at predetermined time intervals of thumbnail days. The data is multiplexed with the A / V data, and the management information on the thumbnail data is stored in a predetermined area.

In order to achieve the above another object, the recording and reproducing method according to the present invention is a method for recording and reproducing audio and / or video (A / V) data on a recording and rewritable recording medium: (a) A / V If the time to record the thumbnail while recording the data in real time to collect the still data for the thumbnail to configure the thumbnail data of the group unit, (b) multiplexing the thumbnail data of the group unit with the A / V data currently being recorded And (c) recording management information for thumbnail data when real-time recording of the A / V data is completed.

In addition, the recording and reproducing method according to the present invention comprises the steps of (d) accessing an area in which management information for a thumbnail is stored, (e) accessing a location stored on an actual recording medium of thumbnail group data using the management information, (f) extracting thumbnail group data from the A / V data and the multiplexed data at the accessed position; and (g) reproducing the extracted thumbnail group data as a still image and displaying it in a menu form. Doing.

In order to achieve the above another object, the recording and reproducing method according to the present invention is a method for recording and reproducing audio and / or video (A / V) data in real time on a recording medium capable of recording and reproducing: (a Determining whether the recording mode is the recording mode or the playback mode; and (b) collecting the still image data for the thumbnails in group units if it is time to record the thumbnails while recording the A / V data in real time if the determined mode is the recording mode. (C) multiplexing the thumbnail data in group units with the currently recorded A / V data, and (d) recording the management information for the thumbnail data when the real-time recording of the A / V data is finished. It is characterized by including.

In addition, the recording and reproducing method according to the present invention comprises the steps of: (e) collecting thumbnail data for thumbnails in the unit of a group by collecting still data for thumbnails when it is time to record thumbnails during A / V data reproduction when the determined mode is a reproduction mode; (f) if thumbnail data in group units is configured, pausing playback of A / V data, moving to an area to record thumbnail group data, recording thumbnail group data and restarting playback; and (g) A / V. And recording management information for the thumbnail data when the reproduction of the data is finished.

In addition, the recording and reproducing method according to the present invention comprises the steps of (h) accessing an area in which management information for a thumbnail is stored, (i) determining whether thumbnail group data configured in a recording mode or a reproduction mode using management information, ( j) accessing the location stored on the actual recording medium of the thumbnail group data using management information if the thumbnail group data is configured in the recording mode; and (k) the thumbnail group data from the A / V data and the multiplexed data at the accessed location. And extracting the extracted thumbnail group data as a still image and displaying the extracted thumbnail group data in the form of a menu.

Furthermore, the recording and reproducing method according to the present invention further comprises the steps of (m) accessing the position stored on the actual recording medium of the thumbnail group data using the management information if the thumbnail group data is configured in the reproduction mode, and (n) the stored position at the accessed position. And displaying the thumbnail group data in the form of a menu by reproducing the thumbnail group data as a still image.

In order to achieve the above another object, the recording and reproducing apparatus according to the present invention is an apparatus for recording and reproducing audio and / or video (A / V) data on a recordable and rewritable recording medium: A video encoder applying encoded and encoded video data, an audio encoder encoding encoded audio data, and applying encoded audio data, and storing encoded video data of a still image corresponding to a time to record a thumbnail for a predetermined number of still images. And an MPEG system layer encoder for applying a encoded MPEG stream by encoding the thumbnail group data into the MPEG system layer and outputting the thumbnail group data.

In addition, the recording and reproducing apparatus according to the present invention decodes thumbnail data from an encoded MPEG stream, an MPEG decoder for outputting audio and video streams, a thumbnail buffer for temporarily storing thumbnail data, and a video stream for decoding the thumbnail data from the thumbnail buffer. The apparatus further includes a video decoder which does not decode the video stream during reproduction of still pictures, and an audio decoder which decodes the audio stream while reproduction of the thumbnail data does not decode.

1 is a view showing a display example of a thumbnail group to help understanding of the present invention.

2 is a view showing the form of thumbnail group data according to the present invention.

3 is a view showing an example of a method of storing thumbnail data according to the present invention.

FIG. 4 is a diagram showing the configuration of general A / V data shown in FIG.

FIG. 5 is a diagram illustrating the configuration of A / V data + thumbnail data shown in FIG. 3.

6 is a thumbnail information table according to the present invention.

FIG. 7 is an example of each thumbnail group information table shown in FIG. 6.

8 is another example of each thumbnail group information table shown in FIG. 6.

9 is a flowchart according to an embodiment of a method of recording thumbnail data and management information therefor according to the present invention.

10 is a flowchart according to another embodiment of a method of recording thumbnail data and management information therefor according to the present invention.

11 is a flowchart according to another embodiment of a method of recording thumbnail data and management information therefor according to the present invention.

12 is a flowchart according to an embodiment of a method of reproducing thumbnail data and management information therefor according to the present invention.

13 is a flowchart according to another embodiment of a method of reproducing thumbnail data and management information therefor according to the present invention.

14 is a block diagram according to an embodiment of the encoder of the recording / playback apparatus according to the present invention.

15 is a block diagram according to an embodiment of the decoder of the recording / playback apparatus according to the present invention.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a recording medium, a recording and reproducing method and apparatus for storing thumbnail data and management information therefor in real time according to the present invention will be described.

According to the present invention, when recording A / V data on a disc in real time, thumbnail data and management information therefor are also recorded in real time, and during playback, a plurality of thumbnails are configured in real time as shown in FIG. Allows display in form.

That is, as shown in FIG. 1, each scene of a predetermined time interval (for example, 10 minute interval) is composed of thumbnails, and a plurality of thumbnails are bundled to form a thumbnail group and displayed at the same time. The time displayed in each scene represents the playback time of each thumbnail. The time interval displayed in the thumbnail is variable so that the user can determine it. In order to make these thumbnails into a group consisting of several thumbnails and store them on a disc in real time, the present invention down-samples each thumbnail to reduce the resolution and then code in an MPEG (Moving Picture Experts Group) Intra Mode. It consists of still pictures.

In FIG. 1, six thumbnails are displayed on one screen, but still images for the thumbnails when the number of thumbnails is M are configured as shown in FIG. 2. At this time, each thumbnail picture is coded in the MPEG intra mode, and when one thumbnail group data is configured in this way, as shown in FIG. 3, the A / V data corresponding to the point in time at which the thumbnail group data is configured is recorded. The thumbnail group data is multiplexed with the original A / V data and recorded as a sub-stream of the MPEG system layer.

As shown in FIG. 3, which shows an example of a method of storing the thumbnail group data, normal A / V data is recorded in pack units as shown in FIG. 4 when the thumbnail data in group units is not completed. When the thumbnail data of the group of is completed, as shown in Fig. 5, the thumbnail data of the pack unit is multiplexed and recorded with the A / V data of the pack unit to be recorded at the recording position.

In order to display the thumbnail data recorded in real time in the form of a menu as shown in FIG. 1, thumbnail table information is required. 6 is a table for managing thumbnail groups according to the present invention, and a table for the thumbnail data may be referred to as management information.

THUMB_TM_INT shown in FIG. 6 represents a time interval between each thumbnail. This can be determined by the user. THUMB_GR_Ns represents the number N of thumbnail groups represented by one menu screen. N THUMB_GR_INFOTBLs are respective thumbnail group information tables.

FIG. 7 is an example of the contents of any one thumbnail group information table of the N thumbnail group information tables THUMB_GR_INFOTBL shown in FIG. 6. THUMB_GR_TH_Ns shown in FIG. 7 indicates the number of thumbnails (here M) in one thumbnail group. THUMB_GR_PIC_ST_LBN indicates the start position in the disk where each thumbnail group is stored, and this position information is represented by a logical block number (LBN). THUMB_GR_PIC_LA_LBN indicates the last position on the disk where each thumbnail group is stored. THUMB_PB_STLBN indicates the starting position at which each thumbnail is actually played. THUMB_PB_LALBN indicates the last position where each thumbnail is actually played. THUMB_ELAP_TM is time information corresponding to the playback position indicated by each thumbnail. The time information of the playback position may be the time information of the equal interval specified by the user, and may not record the thumbnail data at the exact interval at the time of real time recording. It may be corresponding time information. Such reproduction position information and time information are recorded in the thumbnail group by the number of thumbnails (M in the figure).

FIG. 8 is another example illustrating the contents of any one thumbnail group information table of the N thumbnail group information tables THUMB_GR_INFOTBL shown in FIG. 6. The thumbnail group information table shown in FIG. 8 differs from the thumbnail group information table shown in FIG. 7 in that the thumbnail data is data recorded in the reproduction mode of A / V data, or data configured in the recording mode of A / V data. It further includes attribute information (THUMB_GR_ATTR) that can determine whether or not.

9 is a flowchart illustrating a method of multiplexing and recording thumbnail data having a configuration as described above and a thumbnail information table therefor in real time with A / V data is shown in FIG. 9. In FIG. 9, the time interval of each thumbnail is set (step S101), and the number of thumbnails to be displayed on one menu screen is set (step S102). These steps S101 and S102 are set in advance before starting recording of the A / V data.

When the real-time recording starts (step S103), it is first determined whether the real-time recording of the A / V data is finished (step S104), and when the recording of the A / V data ends before the time interval of the set thumbnail, the thumbnail data and the If there is data stored in the thumbnail memory without ending the management information, the thumbnail data is recorded in the predetermined area even though the thumbnail group is not completed (step S109), and the thumbnail information table is recorded in the predetermined area (step S110). At this time, the thumbnail data may be recorded, for example, at the end of the data area or may be recorded in any other area, and the thumbnail information table may be recorded in the information area.

If the real time recording of the A / V data is not finished in step S104, after determining whether the current recording time is a thumbnail time interval (step S105), when it is time to record the thumbnail, the coded still picture data constituting the thumbnail is memorized. Save temporarily using (step S106). If the current recording time is not the time corresponding to the thumbnail time interval in step S105, the process returns to step S104 to determine the end of the real-time recording of the A / V data.

When the number of thumbnails stored in the memory becomes the number capable of completing the thumbnail group (step S107), the A / V data and the thumbnail group data currently being recorded are multiplexed on the MPEG system layer and shown on the disc as shown in FIG. Record (step S108). At this time, recording should be performed when the bit rate of the A / V data being recorded is low in consideration of the bit rate of the A / V data currently being recorded. In addition, the thumbnail group data is data coded in the intra mode of MPEG as described above.

After the thumbnail group is not completed in step S107 or after performing step S108, the flow returns to step S104 to determine the end of real-time recording of the A / V data. When the real time recording of the A / V data is finished in step S104, if there is data stored in the thumbnail memory, the thumbnail data is recorded even if the thumbnail group is not completed (step S109), and the thumbnail information table as shown in Figs. Is recorded in a predetermined area on the disk (step S110), and then ends.

10 is a flow chart according to another embodiment of a method of recording thumbnail data and management information therefor according to the present invention, in which the thumbnail interval is recorded in FIG. 9 while recording the thumbnail data when the A / V data is being recorded. Unlike being set, the thumbnail is recorded at any time desired by the user.

In Fig. 10, the number of thumbnails to be displayed on one screen is set before starting recording of the A / V data (step S201). When real-time recording starts (step S202), it is first determined whether the real-time recording of the A / V data is finished (step S203), and if there is data stored in the thumbnail memory, the thumbnail data is recorded even if the thumbnail group is not completed (S208). In operation S209, a thumbnail information table is recorded in a predetermined area.

If the real-time recording of the A / V data is not finished in step S203, after determining whether thumbnail recording is required by the user (step S204), if thumbnail recording is required, the coded still picture data constituting the thumbnail is stored using a memory. Temporarily save (step S205). If thumbnail recording is not required in step S204, the flow returns to step S203 to determine the end of real-time recording of the A / V data.

When the number of thumbnails stored in the memory becomes the number capable of completing the thumbnail group (step S206), the A / V data and the thumbnail group data currently being recorded are multiplexed in the MPEG system layer on the disc as shown in FIG. Record (step S207). At this time, recording should be performed when the bit rate of the A / V data being recorded is low in consideration of the bit rate of the A / V data currently being recorded. In addition, the thumbnail group data is data coded in the intra mode of MPEG as described above.

After the thumbnail group is not completed in step S206 or after performing step S207, the process returns to step S203 for determining the end of real time recording of the A / V data. When the A / V data is recorded in this way, the completed thumbnail group data is multiplexed with the A / V data, and when the real time recording of the A / V data is terminated in step S203, the thumbnail group is not completed if there is data stored in the thumbnail memory. If not, the thumbnail data is recorded (step S208), and the thumbnail information table as shown in Figs. 6 and 8 is recorded in a predetermined area on the disc (step S209), and then ends. In particular, the thumbnail group attribute THUMB_GR_ATTR in the thumbnail information table shown in FIG. 8 stores information indicating that thumbnail data has been recorded in the recording mode.

FIG. 11 is a flow chart according to another embodiment of a method of recording thumbnail data and management information therefor according to the present invention, which is different from recording thumbnail data when recording A / V data in FIG. The thumbnail data is recorded at the time desired by the user while the thumbnail data is recorded during playback.

In Fig. 11, before starting recording of A / V data, the number of thumbnails to be displayed on one screen is set (step S301). When playback starts (step S302), it is first determined whether playback of A / V data has ended. After the determination (step S303), if there is data stored in the thumbnail memory, the thumbnail data is recorded even if the thumbnail group is not completed (step S309), and the thumbnail information table is recorded in the predetermined area (step S310).

If playback of the A / V data is not finished in step S303, after determining whether thumbnail recording is required by the user (step S304), if thumbnail recording is required, the coded still picture data constituting the thumbnail is temporarily stored using the memory. Save it (step S305). If thumbnail recording is not required in step S304, the flow returns to step S303 to determine the end of reproduction of the A / V data.

When the number of thumbnails stored in the memory reaches the number capable of completing the thumbnail group (step S306), the playback of the current A / V data is paused for a while and the disc is moved to the area to record the thumbnail group data (step S307). After the thumbnail data is recorded in the predetermined region, playback of the original A / V data is restarted (step S308). Since the thumbnail data does not have a large amount of data, a brief playback stop operation is performed. When recording thumbnail data during playback, it is not necessary to multiplex thumbnail data into a substream of MPEG because recording does not have to be performed simultaneously with A / V data in real time.

This process is repeated until the reproduction of the A / V data is stopped, and when the reproduction of the A / V data is finished, the flow proceeds to step S309. When the playback of the A / V data is finished, if there is thumbnail data in the thumbnail memory at the end of playback, the thumbnail group data is recorded even if it is not completed as the thumbnail group data (step S309), as shown in FIGS. 6 and 8. After the thumbnail information table is recorded in a predetermined area on the disc (step S310), the process ends. In particular, the thumbnail group attribute THUMBNAIL_GR_ATTR in the thumbnail information table shown in FIG. 8 stores information indicating that the thumbnail group has been recorded in the reproduction mode.

In the present invention, a method of recording thumbnail data in a recording mode as shown in FIG. 10 and a method of recording thumbnail data in a playback mode as shown in FIG. 11 are described as separate embodiments. There may further be an example in which the thumbnail data is recorded in the recording mode in the recording mode, and the thumbnail data in the recording mode in the playback mode in the recording mode.

Meanwhile, an embodiment of a method of reproducing thumbnail data using thumbnail table information is illustrated in FIG. 12. In Fig. 12, the area in which the thumbnail information table as shown in Figs. 6 and 7 is stored is accessed (step S401), and the thumbnail group data is stored on the actual disk using the information stored in the thumbnail information table (THUMB_GR_PIC_ST_LBN). The stored position is accessed (step S402), the MPEG system layer stream is decoded, and only the thumbnail data consisting of substreams except the A / V data is extracted from the decoded data (step S403). When played back (step S404), the menu screen of the thumbnail can be displayed as shown in FIG. The thumbnail corresponding to the previous thumbnail group or the next playback time, and the thumbnail corresponding to the input of the playback time of the user can be displayed using the thumbnail information tables shown in FIGS. 6 and 7.

Another embodiment of a method of reproducing thumbnail data using the thumbnail table information shown in FIGS. 6 and 8 is illustrated in FIG. 13. In Fig. 13, the area in which the thumbnail information table as shown in Figs. 6 and 8 is stored is accessed (step S501), the thumbnail group attribute (THUMB_GR_ATTR) stored in the thumbnail information table is read out, and this thumbnail data is written in the recording mode. In step S502, it is determined whether or not the thumbnail group data configured in (0) or the reproduction mode (1).

If the thumbnail group data is recorded in the recording mode in step S502, the position where the thumbnail group data is stored on the physical disk is accessed using the information THUMB_GR_PIC_ST_LBN stored in the thumbnail information table (step S503), and the MPEG system layer stream is decoded and decoded. Only the thumbnail data composed of the sub-streams except the A / V data is extracted (step S504), and the extracted thumbnail data is reproduced as a still picture (step S505).

When the thumbnail group data is recorded in the playback mode in step S502, the thumbnail group data is accessed using the information stored in the thumbnail information table (THUMB_GR_PIC_ST_LBN) to access the location stored on the physical disk (step S506). Since it is not configured as a substream, the thumbnail data configured in the MPEG intra mode stored at the accessed position is reproduced as a still picture and displayed on the screen (step S507).

On the other hand, if the case where the A / V data in which already recorded thumbnail data is multiplexed occurs, this thumbnail data must be edited together, and the information stored in the thumbnail information table must also be updated.

That is, delete part of A / V data recorded on disk, merge A / V data according to two desired programs (title), copy A / V data of desired program, A / V data of desired program According to the editing mode such as Split, reconstruct only the thumbnails that should actually be displayed after the final editing of the A / V data, and update the data stored in the thumbnail information table.

For example, if an edit is to be made in which some A / V data corresponding to the playback time in one thumbnail group is deleted, the thumbnail group data is moved to a predetermined area on the disc, and thumbnails after editing the A / V data are displayed. Only the thumbnail data that should not be deleted is reconstructed and rewritten using the reproduction time information stored in the information table, and the information on the reconstructed thumbnail group is also updated. That is, if one thumbnail group consists of six scenes and only four scenes remain after editing, the thumbnail data is reconstructed and recorded so that only four scenes remain, and the thumbnail group table for the thumbnail group data reconstructed from the thumbnail information table If the information is updated, and all scenes in the thumbnail group are deleted after the editing of the A / V data, the thumbnail data corresponding to the thumbnail group is also deleted, and the information for the thumbnail group data is also removed from the thumbnail information table.

14 is a block diagram of an encoder for recording thumbnail data according to an embodiment of the present invention. In FIG. 14, the first video buffer 102 and the first audio buffer 104 are input to the video encoder 106 and the audio encoder 108, respectively, after being temporarily stored by inputting uncompressed video and audio data. .

The video encoder 106 and the audio encoder 108 compress and encode the video data and the audio data temporarily stored in the first video buffer 102 and the first audio buffer 104 to convert the encoded video data and the audio data into the second video. The buffer 110 and the second audio buffer 114 are respectively stored. At this time, when there is a request for storing the thumbnail information by the user or when the time corresponds to a preset thumbnail time interval, the encoded intra picture corresponding thereto is stored in the thumbnail buffer 112. Since the intra picture is data generated without storing the thumbnail information, a separate MPEG video encoder is not required for encoding the thumbnail data. When the intra picture for the thumbnails thus obtained is a preset number displayed on one screen at a time, and the thumbnail group data is stored in the thumbnail buffer 112, the thumbnail group data is read out from the thumbnail buffer 112 and the MPEG system layer encoder ( Abbreviated MPEG encoder: 116).

The MPEG encoder 116 multiplexes the thumbnail group data into an MPEG system layer and stores it on the disc. However, the MPEG encoder 116 sub-streams the thumbnail group data read from the thumbnail buffer 112 in the recording mode (REC) according to the mode signal REC / PB. As an example, the MPEG system layer stream (abbreviated as MPEG stream) output by multiplexing with A / V data read out from the second video buffer 110 and the second audio buffer 114 is outputted. The thumbnail group data read out from the buffer 112 is encoded by the MPEG system layer to output the encoded MPEG stream.

15 is a block diagram of a decoder for thumbnail playback according to an embodiment of the present invention. In FIG. 15, thumbnail data multiplexed from an input encoded MPEG stream into a substream is demultiplexed by an MPEG system layer decoder (abbreviated as MPEG decoder: 202) and applied to the thumbnail buffer 206. In FIG. At this time, the demultiplexed main video stream and the audio stream such as thumbnail data are discarded without being applied to the video buffer 204 and the audio buffer 208. This is because only the thumbnail data needs to be displayed, so the main video and audio streams do not have to be played. In this case, no separate video decoder is required. This thumbnail data is sent to the video decoder 210 for decoding and then displayed on the screen as a still picture.

On the other hand, in the case of the thumbnail data recorded in the playback mode, since it is not multiplexed with the audio and video streams, the MPEG decoder 202 extracts the thumbnail data from the MPEG stream and applies it to the thumbnail buffer 208, and the video decoder 210 The extracted thumbnail data is reproduced as a still picture.

General playback of video data decodes the video stream read out from the video buffer 204 at the video decoder 210 to output decoded video data, and playback of audio data outputs the audio stream read out from the audio buffer 208. The decoder 212 decodes and outputs the decoded audio data.

In the embodiment of the present invention, the thumbnail group picture is configured in the form of a MEPG intra mode picture, but JPEG, which is frequently used in still pictures, may be used. In addition, the present invention provides a DVD-RAM (Random Access Memory), DVD-Recorder, DVD-R / W (Read / Write), HD (High Density)-which can record A / V data in a recordable system of a DVD disc. Applicable to systems such as DVDs.

According to the present invention, when recording A / V data in real time, the thumbnail data and management information therefor are recorded in real time, and the thumbnail can be immediately reproduced in real time so that the user can search the A / V data at a desired time. This has the advantage of eliminating the added advantage and the extra time it takes to organize the thumbnails.

In addition, the present invention has the effect that the thumbnail data can be configured at the time desired by the user not only when recording but also playing the A / V data.

In addition, the present invention has the advantage of eliminating the loss of the thumbnail data and information therefor by editing the thumbnail data and the thumbnail information table when editing the A / V data.

Claims (39)

In a recording medium on which audio and / or video (A / V) data is recorded: And a group of thumbnail data displayed on one screen having a predetermined time interval of thumbnail days and multiplexed with the A / V data, and recording information stored in a predetermined area. The recording medium of claim 1, wherein the thumbnail data is configured in pack units, and the thumbnail data in pack units is multiplexed and stored in real time with A / V data in pack units. The recording medium of claim 1, wherein the group of thumbnail data is a predetermined number of still pictures coded in MPEG intra mode. The recording medium of claim 1, wherein the group of thumbnail data is a predetermined number of still pictures coded in a JPEG coding mode. The recording medium of claim 1, wherein the predetermined time intervals are equally spaced. The recording medium of claim 1, wherein the predetermined time interval is arbitrarily set by a user in consideration of a bit rate. The recording medium of claim 1, wherein the management information includes time interval information for thumbnail days, the number of thumbnail groups displayed on one menu screen, and each thumbnail group information table. 8. The method of claim 7, wherein each thumbnail group information table includes a number of thumbnails in one thumbnail group, a start position and a last position in a recording medium in which each thumbnail group is stored, and a start position and a last point at which each thumbnail is actually reproduced. And time information corresponding to the playback position indicated by each thumbnail. 9. The recording medium of claim 8, wherein each of the thumbnail group information tables further includes a thumbnail group attribute indicating whether the thumbnail group data is recorded in a recording mode or a reproduction mode. 10. The apparatus of claim 9, wherein the thumbnail data is multiplexed and stored as a sub-stream in the recording mode and the thumbnail data is stored in a predetermined area without being multiplexed with the A / V data in the playback mode. And a recording medium. A method of recording and reproducing audio and / or video (A / V) data on a recordable and rewritable recording medium: (a) collecting thumbnail data for thumbnails to configure thumbnail data in group units when it is time to record thumbnails while recording the A / V data in real time; (b) multiplexing the thumbnail data of the group unit with the A / V data currently being recorded; And (c) recording management information for the thumbnail data when real-time recording of the A / V data is completed. The method of claim 11, wherein the step (a), (a1) setting a time interval of thumbnails and the number of thumbnails to be displayed on one menu screen; (a2) determining whether a current recording time is a time interval of a set thumbnail while recording the A / V data in real time; (a3) temporarily storing still data for thumbnails using a memory if the current recording time is a time interval of thumbnails; And (a4) recording and reproducing the still image data for the thumbnail up to the number of thumbnail groups to be completed. The method of claim 11, wherein the step (a), (a11) setting a number of thumbnails to appear on one menu screen; (a12) determining whether a recording of a thumbnail is required by a user while recording the A / V data in real time; (a13) temporarily storing still data for thumbnails using a memory when recording of thumbnails is requested by a user; And (a14) recording and reproducing the still image data for the thumbnail up to the number of thumbnail groups to be completed. The method of claim 11, wherein the method is (d) accessing an area in which management information for the thumbnail is stored; (e) accessing a location stored on an actual recording medium of thumbnail group data using the management information; (f) extracting thumbnail group data from the A / V data and the multiplexed data at the accessed position; And and (g) reproducing the extracted thumbnail group data as a still picture and displaying the extracted thumbnail group data in a menu form. The method of claim 11, (h) reconfiguring thumbnail data corresponding to the edited A / V data after editing the A / V data according to a predetermined editing mode; And (i) updating management information for the reconstructed thumbnail data. A method of recording and reproducing audio and / or video (A / V) data on a recordable and rewritable recording medium: (a) determining whether the recording mode or the reproduction mode; (b) when the determined mode is a recording mode, when the time for recording a thumbnail is recorded while recording the A / V data in real time, collecting still data for a thumbnail to configure thumbnail data in group units; (c) multiplexing the thumbnail data of the group unit with the A / V data currently being recorded; And (d) recording management information for the thumbnail data when the real-time recording of the A / V data is finished. The method of claim 16, wherein step (b) comprises: (b1) setting a time interval of thumbnails and the number of thumbnails to appear on one menu screen; (b2) determining whether a current recording time is a time interval of a set thumbnail while recording the A / V data in real time; (b3) temporarily storing still data for thumbnails using a memory if the current recording time is a time interval of thumbnails; And (b4) storing the still image data for the thumbnail up to the number of thumbnail groups to be completed. The method of claim 17, (b5) determining whether real-time recording of the A / V data is finished; (b6) if the real-time recording of the A / V data ends before the set time interval of the thumbnail, ending without storing the thumbnail data and management information therefor; And and (b7) if there is incomplete thumbnail data stored in the step (b4), storing the thumbnail data and the management information therefor in a predetermined area and then ending the recording and reproducing method. 18. The recording and reproducing method according to claim 17, wherein the time intervals of the thumbnail days are equal intervals. The method of claim 16, wherein step (b) comprises: (b11) setting the number of thumbnails to be displayed on one menu screen; (b12) determining whether a recording of a thumbnail is required by a user while recording the A / V data in real time; (b13) temporarily storing still image data for the thumbnail using the memory when recording of the thumbnail is requested by the user; And (b14) recording and reproducing the still image data for the thumbnail up to the number of thumbnail groups to be completed. The method of claim 20, (b15) determining whether real-time recording of the A / V data is finished; And (b16) recording and reproducing, if there is incomplete thumbnail data stored in the step (b14), storing the thumbnail data and management information for the same in a predetermined area and ending the same. 21. The recording and reproducing method according to claim 20, wherein in step (b12), a thumbnail is arbitrarily requested by a user in consideration of the bit rate. 17. The method of claim 16, wherein in the step (c), the still picture data for the thumbnails is configured in pack units, and the thumbnail data of the pack units is multiplexed and recorded in real time with the A / V data of the pack unit. Record playback method. 17. The recording and reproducing method according to claim 16, wherein the management information for the thumbnails includes time interval information of thumbnails, the number of thumbnail groups displayed on one menu screen, and each thumbnail group information table. 25. The apparatus of claim 24, wherein each thumbnail group information table includes a number of thumbnails in one thumbnail group, a start position and a last position in a recording medium in which each thumbnail group is stored, and a start position and a last point where each thumbnail is actually reproduced. And time information corresponding to the playback position indicated by the position and each thumbnail. 27. The recording medium of claim 25, wherein each thumbnail group information table further includes a thumbnail group attribute indicating whether the thumbnail group data is recorded in a recording mode or a reproduction mode. The method of claim 16, (e) when the mode determined in the step (a) is a playback mode, when the time to record the thumbnail while playing the A / V data, collecting the still data for the thumbnail to configure the thumbnail data in group units; (f) if thumbnail data on a group basis is configured, pausing playback of the A / V data, moving to an area to record thumbnail group data, recording thumbnail group data, and restarting playback; And (g) recording the management information for the thumbnail data when the reproduction of the A / V data is finished. 28. The recording and reproducing method according to claim 27, wherein the time intervals of the thumbnail days are set at equal intervals. 28. The recording and reproducing method according to claim 27, wherein the time interval of the thumbnail is arbitrarily set by a user in consideration of a bit rate. The method of claim 16, wherein the method is (h) accessing an area where management information for the thumbnail is stored; (i) determining whether thumbnail group data is configured in a recording mode or a reproduction mode by using the management information; (j) accessing a location stored on an actual recording medium of thumbnail group data using the management information if the result determined in step (i) is the thumbnail group data configured in the recording mode; (k) extracting thumbnail group data from the A / V data and the multiplexed data at the accessed position; And (l) recording and reproducing the extracted thumbnail group data as a still image and displaying the picture in a menu form. The method of claim 30, (m) accessing a location stored on an actual recording medium of thumbnail group data using the management information if the result determined in step (i) is thumbnail group data configured in a reproduction mode; And and (n) reproducing the thumbnail group data stored at the accessed position in a still image and displaying the thumbnail group data in a menu form. The method of claim 30, and displaying a thumbnail corresponding to a previous thumbnail group, a thumbnail corresponding to a next playback time, and a user's playback time input using the management information for the thumbnail. The method of claim 16, (p) reconstructing thumbnail data corresponding to the edited A / V data after editing the A / V data according to a predetermined editing mode; And (q) updating the management information for the reconstructed thumbnail data. The method of claim 33, wherein and (r) in the editing mode, moving the thumbnail data associated with the A / V data to be edited before editing into a predetermined area on the recording medium. An apparatus for recording and reproducing audio and / or video (A / V) data on a recordable and rewritable recording medium: A video encoder for encoding an input video signal and applying encoded video data; An audio encoder which encodes an input audio signal and applies encoded audio data; A thumbnail buffer configured to store encoded video data of a still picture corresponding to a time to record a thumbnail by a predetermined number of still pictures, and output thumbnail group data; And And an MPEG system layer encoder which encodes the thumbnail group data into an MPEG system layer and applies an encoded MPEG stream. 36. The recording and reproducing apparatus according to claim 35, wherein the still image coded video data for the thumbnails is stored in the thumbnail buffer at predetermined equal intervals. 36. The recording and reproducing apparatus according to claim 35, wherein the still image coded video data for the thumbnail is stored in the thumbnail buffer when arbitrarily requested by a user. 36. The apparatus of claim 35, wherein the MPEG system layer encoder multiplexes the encoded A / V data in real time in a recording mode as a sub-stream in the recording mode according to a mode signal, and encodes the thumbnail group data in the reproduction mode. A recording and reproducing apparatus, characterized by encoding with an MPEG system layer without multiplexing with A / V data. 36. The method of claim 35 wherein An MPEG decoder for outputting thumbnail data, audio streams and video streams from the encoded MPEG streams; A thumbnail buffer for temporarily storing the thumbnail data; A video decoder that decodes the video stream but does not decode the video stream while still playing thumbnail data from the thumbnail buffer; And And an audio decoder which decodes the audio stream from the audio buffer but does not decode the audio stream while the thumbnail data is reproduced in a still state.