KR100657238B1 - Recording medium storing scene change point information for navigation of A/V contents, method for automatically generating this information, playback method using the same, and recording and/or playback apparatus - Google Patents

Abstract

The present invention discloses a recording medium storing scene change point information for searching for A / V content, a method for automatically generating this information, a reproduction method using this information, and a recording / reproducing apparatus. According to the present invention, a digital recording / playback apparatus detects a property of input audio and / or video (A / V) data and generates scene change point information at a moment when the property of the A / V data is changed, thereby allowing a user to It is possible to implement the generation of efficient scene change point information by monitoring scene change of A / V data and automatically generating scene change point information according to the property change without the need for additional manipulation, and the burden of hardware does not increase.

Description

Recording medium storing scene change point information for retrieving A / V content, a method of automatically generating this information, a reproduction method using this information, and a recording / reproducing apparatus / V contents, method for automatically generating this information, playback method using the same, and recording and / or playback apparatus}

1 is a block diagram of a conventional apparatus for recording scene change point information.

2 is a block diagram of an apparatus for recording / reproducing scene change point information according to an embodiment of the present invention.

3 is a diagram illustrating a relationship between a data string time search table and an A / V data string to help understand the present invention.

4 is a diagram illustrating a relationship between cell data and A / V data strings included in a program table for better understanding of the present invention.

5 is a diagram illustrating a relationship between scene change point information and cell data included in a program for better understanding of the present invention.

6 is a table showing attribute information of A / V data to help understanding of the present invention.

7 is a table illustrating an example of an automatic generation process of scene change point information according to the present invention.

8 is a flowchart according to an embodiment of an automatic generation method of scene change point information according to the present invention.

FIELD OF THE INVENTION The present invention relates to the field of digital data searching (called navigation or browsing), in particular recording media storing scene change point information for searching for audio and / or video (A / V) content, the information The present invention relates to a method for automatically generating a file, a reproduction method using this information, and a recording / reproducing apparatus.

In a device for recording and / or playing back A / V data, navigation means moving from the current A / V data position to the desired position according to the user's operation and resuming playback from there. The reproduction order of the V data is rearranged in the order desired by the user irrespective of the original recording order, thereby providing reproduction when the user desires the relocation order. Therefore, navigation data is additional information for implementing a navigation function, and is arbitrarily edited by a user or a producer, and a data string time search table for storing information corresponding to the recording position of A / V data and the reproduction time of the data. And a program table for storing the replay order relocation information.

A recording and / or reproducing apparatus is developed which stores A / V data used in digital satellite broadcasting or digital high resolution broadcasting on a one-dimensional recording medium such as a tape, and implements basic navigation functions including special reproduction such as trick playback. have. Also, to store such A / V data in a two-dimensional recording medium such as an optical disk, and to implement the function (search function) of skipping the playback order or returning to the previous screen and repeating playback according to the user's request during playback. In general, scene turning point information is used.

Therefore, the scene change point information in the apparatus for recording / reproducing navigation data for this together with the A / V data on the digital recording medium is essential information during reproduction. For example, suppose that a user has recorded all the broadcasts broadcast for one day from a specific station on a single disc. At this time, the user may feel bored to see the drama program recorded in the first part and skip to the next program. The necessary information at this time is scene change point information.

The scene change point information is pointer information indicating a specific position in the entire area of the program. The scene change point information indicates a position currently being played when the user receives a forward or backward skip command ("search command"). Points to the position where it exits and resumes playback. Scene turning point information may be recorded based on various criteria.

In the conventional digital recording / reproducing apparatus, the recording apparatus for generating scene change point information and recording it on a one-dimensional recording medium such as a tape includes a controller 102, an A / V encoder 104, and a scene change point information generator as shown in FIG. 106 and recording controller 108.

Conventionally, manual manipulation information input from a user is used to generate scene change point information. That is, the recording apparatus shown in FIG. 1 may be applied to a manual camcorder as an example, and the user is configured to repeatedly press the recording start button and the pause button to record the surrounding environments. In general, the moment when the user presses the pause button and the recording start button, it can be said that one scene change occurs. Therefore, every time such button operation occurs, the controller 102 sends a control signal to the A / V encoder 104. And the scene change point information generator 106.

The A / V encoder 104 encodes the input A / V signal according to a control signal corresponding to the recording start button provided from the controller 102, and provides the encoded A / V data to the recording controller 108, The encoding of the A / V signal is stopped in accordance with the control signal corresponding to the pause button provided from the controller 102.

Meanwhile, the scene change point information generator 106 generates scene change point information according to control signals corresponding to the recording start button and the pause button input by the user provided from the controller 102 and provides the scene change point information to the recording controller 108. . The recording controller 108 records the scene change point information generated by the scene change point information generator 106 together with the A / V data provided from the A / V encoder 104 on the recording medium 110.

As shown in FIG. 1, since a portable digital recording / reproducing apparatus such as a camcorder directly controls the recording process, it is possible to effectively generate scene change point information by using the user's manual button operation information. In the stationary digital recording / reproducing apparatus for recording A / V data continuously transmitted from the apparatus, generation of scene change point information cannot be effectively implemented.

That is, when recording a broadcast signal in a stationary digital recording / reproducing apparatus, a user generally applies only a simple operation of pressing the recording start button once at the start of a program and pressing the pause button when stopping recording. In this case, when the scene change point information is generated based on a user's manual operation, the scene change point information generated only points to two positions of the beginning and end of the program. In addition, since the two moments when the user presses the recording start button and the pause button are not guaranteed to be the exact moments at which a program starts and ends, the digital recording / playback device that records the broadcast does not provide information on the scene change point information by the user's manual operation. It is not appropriate to produce.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a recording medium for storing scene change point information according to a change in attribute change of A / V data.

Another object of the present invention is to provide a method of automatically generating scene change point information according to an attribute change of A / V data by tracking an attribute change of A / V data.

Still another object of the present invention is to provide a method of reproducing at high speed using scene change point information when a search command for skipping to a previous screen or a next screen is input by a user's operation.                         

Another object of the present invention is to track the change of the property of the A / V data to record the scene change point information according to the change of the property of the data, and when a search command is input, the digital recording to play at high speed to the desired screen using the scene change point information / Providing a playback device.

In order to achieve the above objects, the recording medium according to the present invention includes a first area for storing audio and / or video (A / V) data and a scene change point information corresponding to attribute changes of the A / V data. It has two areas.

In the method for automatically generating scene change point information according to the present invention, there is provided a method of generating scene change point information for a digital recording and / or reproducing apparatus, the method comprising: detecting attributes of input audio and / or video (A / V) data; And generating scene change point information at the moment when the property of the A / V data is changed.

The reproduction method according to the present invention includes scene change point information generated in response to a change in an attribute of A / V data and a first area storing audio and / or video (A / V) data in a digital recording and / or reproducing apparatus. A method of reproducing A / V data from a recording medium having a second area for storing, the method comprising: retrieving a desired point in the first area at high speed using scene change point information stored in the second area when a search command is input from a user; And reproducing A / V data from a desired position.

The apparatus according to the present invention is a digital recording and / or reproducing apparatus, comprising: a detector for detecting a property of input audio and / or video (A / V) data, and if a change in the property of the A / V data is detected by the detector And a recording controller for controlling the A / V data and the scene change point information to be recorded on the recording medium.

In addition, the apparatus according to the present invention is characterized in that it further comprises a playback controller for reproducing A / V data from a desired position by searching at a high speed to a desired point using scene change point information when a search command is input from a user. .

Hereinafter, with reference to the accompanying drawings, a recording medium storing scene change point information for searching for A / V content, a method for automatically generating this information, a reproduction method using this information, and a preferred embodiment of the recording / reproducing apparatus Let's explain them.

In FIG. 2, which is a block diagram of an apparatus for recording / reproducing scene change point information according to an embodiment of the present invention, scene change point information is generated by tracking property changes of input A / V data to include scene change point information. The controller 202, the A / V formatter 204, and the navigation data generator 206 are recorded as a navigation data on a two-dimensional recording medium such as an optical disk, and searched at a desired position at high speed according to a search command input from a user. , A recording controller 208, a playback controller 212, and an A / V deformatter 214.

The A / V formatter 204 analyzes the content of the input A / V data and divides the content into minimum recording unit blocks according to a predetermined criterion, and each minimum recording unit block is suitable for storage in the recording medium 210. It is converted into a predetermined disc format and provided to the recording controller 208.

The navigation data generator 206 re-analyzes the individual minimum recording unit blocks analyzed by the A / V formatter 204 to regenerate the corresponding blocks, and the block size information occupied in the disk space by the unit blocks. The navigation data unit includes a time search table and a program table, and the attribute of the A / V data provided from the A / V formatter 204 is changed. Scene change point information generated at the viewpoint is included.

The recording controller 208 records the recording data provided from the A / V formatter 204 and the navigation data provided from the navigation data generator 206 on the disc. The controller 202 controls each block of the A / V formatter 204, the navigation data generator 206, the recording controller 208, the playback controller 212, and the A / V deformatter 214, in particular A / V data attribute vector provided from the A / V formatter 204 periodically monitors whether there is no attribute change, and controls the navigation data generator 206 to generate scene change point information at the moment the attribute change occurs. In addition, an algorithm for generating scene change point information may be stored.

At the time of reproduction, the reproduction controller 212 reads A / V data recorded on the recording medium 210, and records the recording medium 210 according to a control signal corresponding to a search command input by the user provided from the controller 202. Using the scene change point information included in the navigation data recorded in the above), the A / V data recorded at the desired position is read out at a high speed by skipping to the desired point on the disc. The A / V deformatter 214 deformats A / V data formatted in a predetermined disk format provided from the reproduction controller 212 and outputs deformatted A / V data.

For convenience of description, the recording controller 208 and the reproduction controller 212 are separately configured, but may be constituted by one block, which is generally referred to as a codec. In addition, the controller 202 may be referred to as a detector, and the navigation data generator 206 may be referred to as a generator.

FIG. 3 is a diagram showing a relationship between a data string time search table and an A / V data string recorded on a disk for better understanding of the present invention. The recording of A / V data may occur only once for all the data areas of a single disk, but in general, several recording processes are performed. Therefore, it is necessary to distinguish each recording process according to the recording order, so that different data string numbers are assigned and arranged so that each of them can be managed as one independent data string.

In addition, each data string is sequentially divided into minimum recording unit blocks according to a reference according to the reproduction time or a reference on the recording space for the efficiency of the navigation function and sequentially recorded in one data string. In the data string time search table shown in FIG. 3, for example, the A / V data string number is 2, the third minimum recording unit block of the second data string has a reproduction time of 3 seconds, and the block is located on disk space. It can be seen that the area occupied becomes one sector.

Next, a program table distinguished from the above data string time search table is shown in FIG. The program table is intended to provide a function of continuously reproducing the respective parts of different A / V data strings recorded at arbitrary positions on the disc into one logical program independently of the recording order of the A / V data strings.

One cell serves as a pointer to part or all of one A / V data string. For example, cell 6 is an A / V data string number 2 and a pointer indicating a section between 2 and 17 seconds, and a process of searching for a corresponding position on a disk using this cell information is shown in FIG. 4. . As a result, one program table composed of a plurality of cells serves as a playlist in which portions of content belonging to a plurality of data strings are grouped in an arbitrary order.

FIG. 5 is a diagram for describing a program reproduction process according to each scene change point information when one cell includes a plurality of scene change point information in the program table structure shown in FIG. 4. For example, the first scene change point information included in the cell M indicates the end of the first section of the cell M in the program M, the second scene change point information indicates the end of the second section of the cell M, and the last The kth scene change point information indicates the first portion of the fourth section of cell M.

Assuming that the second section is being played in the cell M of the current program N, when a command for skipping to the next scene is input from the user, the scene transition point information closest to the omnidirectional direction from the current playback position is released from the current playback position in the program. Find it. That is, the program playback will skip to the beginning of the third section, which is the location of the second scene change point information. On the contrary, if the user inputs a command to skip to the previous scene at the same current playback position as above, the playback state will skip the current playback position and switch to the first position of the second section indicated by the first scene change point information.

In performing a transition, the transition point is a point where the user feels that a phase transition occurs in the program, rather than an arbitrary point in the program, for example, where an advertisement is inserted in the middle of a movie. It is appropriate to point to the point at which a new conversation begins to develop between characters. The method and apparatus for automatically generating scene change point information proposed by the present invention is to maximize the convenience of using a digital recording / reproducing apparatus on the user side by automating the process of finding such a location.

6 is a table showing A / V data attribute vector examples to aid in understanding the present invention. The moment that the A / V data attribute vector changes is any of eight items that define the nature of the data: video compression mode, TV system, aspect ratio, video resolution, audio encoding mode, sampling frequency, number of audio channels, audio bitrate. Even though it indicates the moment of change, it is very likely that the A / V data before and after the moment contains different content.

Video attributes may include video compression mode, aspect ratio, TV system, video resolution, and the like, and scenes where the video compression mode changes from MPEG-1 ("0b") to MPEG-2 ("1b") or vice versa. It is considered a turning point. The point at which the video picture aspect ratio changes from 4: 3 ("0b") to 16: 9 ("1b") or vice versa is considered a scene change point. The point at which the TV system property changes from 525 lines / 60 sheets (“0b”) to 625 lines / 50 sheets (“1b”), or vice versa, is considered a scene change point, and the 525/60 TV system (“0b”) The video resolution attributes are 720 lines * 480 pixels ("000b"), 704 lines * 480 pixels ("001b"), 352 lines * 480 pixels ("010b"), 352 lines * 240 pixels ("011b"), 544 The point at which one of the lines * 480 pixels ("100b"), 480 lines * 480 pixels ("101b") changes from one property to another, or on the 625/50 TV system ("1b"), the video resolution property 720 lines * 576 pixels ("000b"), 704 lines * 576 pixels ("001b"), 352 lines * 288 pixels ("011b"), 544 lines * 576 pixels ("100b"), 480 lines * 576 pixels ( A point that changes from one of the " 101b " to any other property is considered a scene change point.

Audio attributes may include audio encoding mode, sampling frequency, number of audio channels, bit rate, and the like. Dolby AC-3 ("00b"), MPEG-1 / 2 without extension bitstream (" 01b "), a point that changes from one of MPEG-2 with extension bitstream (" 10b ") to another one attribute, is considered a scene change point. Scene where the audio sampling frequency attribute changes from one of 48 kHz ("00b"), 44.1 kHz ("01b"), 22.05 kHz ("10b"), or 11.025 kHz ("11b") to any other one It is considered a turning point. The audio channel count attribute is 1 channel ("0000b"), 2 channel stereo ("0001b"), 3 channel ("0010b"), 4 channel ("0011b"), 5 channel ("0100b"), 6 channel (" 0101b "), seven channels (" 0110b "), eight channels (" 0111b "), and two channels dual mono (" 1000b ") are considered to be scene transition points. The audio stream bitrate properties are 64kbps ("0000b"), 89kbps ("0001b"), 96kbps ("0010b"), 112kbps ("0011b"), 128kbps ("0100b"), 160kbps ("0101b"), 192kbps ( "0110b"), 224 kbps ("0111b"), 256 kbps ("1000b"), 320 kbps ("1001b"), 384 kbps ("1010b"), 448 kbps ("1011b"), 768 kbps ("1100b"), 1536 kbps (" 1101b ") is considered a scene change point that changes to any other attribute.

7 is a table illustrating an example of a process of automatically generating scene change point information according to the present invention. In the table, several cells (four advertisements, one soap opera, and one foreign currency) are continuously recorded with each other in time, and show the video attributes and the audio attributes of the A / V data constituting each content. Arrows between cells in the table indicate that a change in the stream attribute vector occurred between the two cells.

First, if you look at the advertisement 1 and the soap opera 1, the video properties of the A / V data are the same, but it can be seen that the bitrate value of the audio properties has changed from 128 kbps to 112 kbps. As a result, it is reasonable to insert scene change point information at the point where these two contents intersect. In addition, one or more A / V data attribute changes occur between soap opera 1 and ad 2, between advertisement 3 and soap opera 1 (continued), between soap opera 1 (continued) and advertising 4, and between advertisement 4 and foreign currency 1. Scene turning point information should be added to these positions. However, since the attribute change of the A / V data does not occur between the advertisement 2 and the advertisement 3, the scene change point information is not added.

The automatic generation of scene change point information according to the present invention will be described in detail as follows.

The controller 202 shown in FIG. 2 periodically monitors the A / V data attribute vector to detect changes in video and audio attributes that occur in the middle of the A / V data. The A / V data attribute vector has a form of an 18-bit bit field. For example, a process of obtaining an A / V data attribute vector of the stream of the continuous pole 1 shown in FIG. 7 with reference to the table shown in FIG. As follows.

The video compression mode of one part of the soap opera is MPEG-2 (code: 1b), the aspect ratio is 4: 3 (code: 0b), the TV system is 525/60 (code: 0b), and the video resolution is 720 * 480 (code: 00b), audio encoding mode is MPEG-2 with extension bitstream (code: 10b), audio sampling rate is 48kHz (code: 00b), number of channels is two-channel stereo (code: 0001b), and finally audio bit Since the rate is 112 kbps (code: 0011b), when each code value is connected in a line to form an 18-bit field, it becomes like "10 0000 1000 0001 0011". This 18-bit binary bit field is the A / It becomes a V stream attribute vector.

An embodiment of a flowchart of an automatic generation method of scene change point information is illustrated in FIG. 8. Automatic generation of the scene change point information may be performed by observing the change while periodically obtaining the A / V data attribute vector in the controller 202 shown in FIG. 2 as described above. That is, while continuously monitoring A / V data attribute vectors that occur continuously, scene change point information is generated by capturing the moment when a change is detected in a specific field.

That is, the A / V data flowing from an arbitrary A / V source is analyzed to generate an attribute vector representing the attribute of the corresponding A / V data (step S101). The change of the A / V attribute vector generated in step S101 is generated. By tracking, it is determined whether the previous A / V attribute vector and the newly generated A / V attribute vector are the same. If the previous A / V attribute vector and the newly generated A / V attribute vector are the same, the process proceeds to step S101. When a change occurs, the absolute difference between the time at which the last scene change point information was recently generated and the current time is compared (step S103), and only when the difference time interval exceeds the predetermined time interval TMmin. After generating the information and resetting the time at which the scene change point was last generated, the flow proceeds to step S101 (step S104).

The following is a comparison between a conventional search method using scene change point information and a search method using scene change point information according to the present invention.

In the simplest case, where the scene point-of-changer information is recorded every 10 minutes, if the program currently playing (sequential play) remains 35 minutes ahead of time, then a 3-minute commercial is displayed before the next program (movie) starts. If you want to search for the next program, the movie, the user jumps four transition points in all directions, jumps one transition point in the reverse direction, and then performs a high-speed screen search for eight minutes in all directions. Only then can you watch the movie you want.

However, using scene point switching point information automatically generated according to the property change of A / V data proposed in the present invention, after jumping one scene change point under the same condition as described above, it moves to the point where the drama ends and the advertisement starts. Also, the jump to the first scene change point moves to the start point of the movie, the next scene change point, and the movie can be easily viewed by only two scene change point jumps.

The present invention can be applied not only to an apparatus for recording / reproducing a high density recording medium such as an optical disk, but also to an apparatus for recording / reproducing an input broadcast signal on a one-dimensional recording medium, and the method and apparatus of the present invention are variously modified and equivalent. Examples are possible.

Since the present invention does not require a user to perform additional additional operations, and has a simple structure of automatically generating scene change point information by monitoring only attribute information of the A / V data rather than decoding A / V data. It is possible to implement efficient generation of scene change point information without burdening hardware on the whole system.

Claims (21)

A first area for storing audio and / or video (A / V) data; And A second area for storing scene change point information corresponding to a property change of the A / V data, The scene change point information is used for reproducing the A / V data from a desired position by searching at a high speed to a desired point in the first area according to a search command input during reproduction of the A / V data. Recording media. The apparatus of claim 1, wherein the A / V data is recorded in the form of a data string consisting of minimum recording unit blocks, and the scene change point information is stored as additional information, and the additional information is required to reproduce the block. A data string time search table including time and block size information occupied in the disk space, and a program table for continuous playback in a logical program independent of the recording order of A / V data strings; And the information is stored in a program table. The A / V data property includes a video property such as a video compression mode, a TV system, an aspect ratio, a video resolution, and an audio property such as an audio coding mode, a sampling frequency, the number of audio channels, and an audio bit rate. And a recording medium. A method of generating scene change point information for a digital recording and / or playback device: Detecting attributes of input audio and / or video (A / V) data; And And generating scene change point information when the property of the A / V data is changed. 5. The apparatus of claim 4, wherein the A / V data is recorded in the form of a data string consisting of minimum recording unit blocks, and the scene change point information is stored as additional information, and the time required for reproducing the corresponding block is included in the additional information. And a data string time search table including block size information occupied by the corresponding block on the disk space, and a program table for continuously playing the data in a logical program independent of the recording order of the A / V data strings. And the information is stored in a program table. The method of claim 4, wherein the generating of the scene change point information comprises: Comparing a difference between a current time at which the attribute change of the A / V data occurs and a time at which the last scene change point information is generated; And And generating scene change point information only when the difference time interval exceeds a predetermined time interval. The method of claim 4, wherein the generating of the scene change point information comprises generating scene change point information at a point where a video compression mode of the attributes of A / V data is changed from MPEG-1 to MPEG-2 or vice versa. How to create. The method of claim 4, wherein the generating of the scene change point information comprises generating scene change point information at a point where a video screen aspect ratio of a property of the A / V data is changed from 4: 3 to 16: 9 or vice versa. Producing method made with. The method of claim 4, wherein the generating of the scene change point information comprises: scene change point information at a point where a TV system property among the attributes of the A / V data is changed from 525 lines / 60 sheets to 625 lines / 50 sheets or vice versa. Generating method, characterized in that for generating. The method of claim 8, wherein the generating of the scene change point information comprises: 720 line 480 pixel, 704 line 480 pixel, 352 line 480 pixel video resolution attribute in the 525/60 TV system among the attributes of the A / V data. , 352 lines * 240 pixels, 544 lines * 480 pixels, 480 lines * 480 pixels, or any other point that changes from one property to another, but on 625/50 TV systems the video resolution property is 720 lines * 576 pixels, 704 And a scene change point information is generated at a point that changes from one of lines * 576 pixels, 352 lines * 288 pixels, 544 lines * 576 pixels, and 480 lines * 576 pixels to any other one attribute. 5. The method of claim 4, wherein the generating of the scene change point information comprises one of Dolby AC-3, MPEG-1 / 2 without extension bitstream, and MPEG-2 with extension bitstream. And a scene change point information is generated at a point that changes from one branch to another one attribute. 5. The method of claim 4, wherein the generating of the scene change point information comprises changing an audio sampling frequency attribute from one of 48 kHz, 44.1 kHz, 22.05 kHz, and 11.025 kHz to another one of the attributes of the A / V data. Generating scene change point information at a point. The method of claim 4, wherein the generating of the scene change point information comprises: 1 channel, 2 channel stereo, 3 channel, 4 channel, 5 channel, 6 channel, 7 channel, among the attributes of the A / V data. Generating scene point information at a point that changes from any one of 8-channel and 2-channel dual mono to any other attribute. The method of claim 4, wherein the generating of the scene change point information comprises: an audio stream bitrate attribute of the attributes of the A / V data is 64kbps, 89kbps, 96kbps, 112kbps, 128kbps, 160kbps, 192kbps, 224kbps, 256kbps, 320kbps, 384kbps. And scene change point information at a point that changes from one of 448 kbps, 768 kbps, and 1536 kbps to any other one attribute. A first area for storing audio and / or video (A / V) data and a second area for storing scene change point information generated in response to a change in an attribute of the A / V data in a digital recording and / or reproducing apparatus; A method for reproducing the A / V data from a recording medium having: And reproducing the A / V data from a desired location by searching at a desired point in the first area at a high speed using the scene change point information stored in the second area when a search command is input from a user. Way. 16. The apparatus of claim 15, wherein the A / V data is recorded in the form of a data string consisting of minimum recording unit blocks, the scene change point information is stored as additional information, and the time required for reproducing the corresponding block in the additional information. And a data table time search table including block size information occupied by the corresponding block on the disk space, and a program table for continuous playback in a logical program independent of the recording order of the A / V data strings. Is stored in the program table. 16. The audio system of claim 15, wherein the A / V data attributes include video attributes including video compression mode, TV system, aspect ratio, video resolution, and the like, audio encoding modes, sampling frequency, number of audio channels, audio bitrate, and the like. A playback method comprising an attribute. In a digital recording and / or playback device: A detector for detecting a property of input audio and / or video (A / V) data; A generator for generating scene change point information when a change in an attribute of A / V data is detected by the detector; And And a recording controller for controlling the A / V data and the scene change point information to be recorded on a recording medium. 19. The apparatus of claim 18, wherein the A / V data is recorded in the form of a data string consisting of minimum recording unit blocks, the scene change point information is stored in a navigation data unit, and the navigation data is required to reproduce the block. A data string time search table including time and block size information occupied in the disk space, and a program table for continuous playback in a logical program independent of the recording order of A / V data strings; A recording / reproducing apparatus, characterized by storing information in a program table. 16. The apparatus of claim 15, wherein the generator includes, by the detector, a video attribute including a video compression mode, a TV system, an aspect ratio, a video resolution, and the like, an audio encoding mode, a sampling frequency, an audio channel number, an audio bitrate, and the like. And the scene change point information is generated when a change is detected in any one of the audio attributes. 21. The recording / reproducing apparatus according to claim 20, further comprising a reproducing controller for reproducing the A / V data from a desired location by searching at a high speed using a scene change point information at a high speed when a search command is input from a user.

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