JP2001325786A - Recording device and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the display speed of a user interface displaying an access point of record data by using a representative picture. SOLUTION: In this device, a recording medium is provided with a representative picture data file, and the device is provided with a means for writing a representative picture in accordance with target information (entry point) for performing random access into a representative picture data file of the recording medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for handling a recording medium on which information obtained by multiplexing an encoded video signal and an encoded audio signal is recorded. The present invention relates to a recording device that records a representative image of a certain section of an encoded video signal or an encoded audio signal, and a reproducing device that reproduces the representative image.

[0002]

2. Description of the Related Art The technology relating to a recording medium for recording images and sounds in real time, a recording device, a reproducing device or an editing device is disclosed in, for example, Japanese Patent Application Laid-Open No. 11-1.
87354.

[0003]

The above publication discloses a recording medium for recording images and sounds in real time, a recording apparatus, a reproducing apparatus, and an editing apparatus. However, it does not describe a method for improving the display speed of a user interface that displays an access point of recording data using a representative image.

An object of the present invention is to provide a technique for improving a display speed of a user interface for displaying an access point of recording data using a representative image.

[0005]

According to a first aspect of the present invention, a recording apparatus comprises: a recording medium; and a video signal recording means for recording an encoded video signal on the recording medium. A mark adding means for adding mark information to a representative image signal corresponding to an image at a predetermined position of a video signal in a recording unit from the start of recording to the end of recording, and accessing the video signal recorded by the video signal recording means Management information recording means for adding the mark information added by the mark addition means to the management information data for recording the recording medium, and recording means for recording the representative image signal on the recording medium. In the first invention, the representative image signal is recorded on the recording medium after the image is reduced.

According to a second aspect of the present invention, there is provided a recording apparatus for recording information obtained by multiplexing an encoded video signal and an encoded audio signal on a recording medium. A recording medium drive for writing information on a storage medium; and a predetermined file format for reading information directly read by the recording medium drive, and a predetermined information for writing directly to the recording medium drive. File system means for converting to a file format, information for random access to information obtained by multiplexing an encoded video signal and an encoded audio signal recorded on the recording medium, and special reproduction Management information data for managing information for reproduction, information of a reproduction order, information of a reproduction range, and landmark information for random access, A management information data access unit that reads from a recording medium through the file system unit, generates the management information data, and writes the management information data to the recording medium through the file system unit; a recording medium drive unit from the recording medium; Means, a management information data expansion memory for expanding the management information data read through the management information access means, and an entry for adding and recording mark information for an image at a predetermined position from the start of recording to the management information data Point addition means, and representative image data writing means for writing a representative image corresponding to the landmark information to the recording medium through the file system.

[0007] In the third invention, a reproducing apparatus comprises: a recording medium on which an encoded video signal, a representative image signal of a recording unit from recording start to recording end, and management information data are recorded; Video signal reading means for reading a recorded encoded video signal from the recording medium;
Management information data having mark information added to a representative image signal corresponding to an image at a predetermined position of the video signal of the recording unit and information for accessing the video signal recorded on the recording medium; And an information access unit for reading the representative image signal from the recording medium using mark information corresponding to a signal requesting a representative image read.

According to a fourth aspect of the present invention, there is provided a playback apparatus for a recording medium on which information obtained by multiplexing an encoded video signal and an encoded audio signal is recorded, wherein the information is directly read from the recording medium, Recording medium drive means for directly writing information, and information read by the recording medium drive means in a predetermined file format, and information for writing in the recording medium drive means in a predetermined file format File system means, and information for random access to information obtained by multiplexing the encoded video signal and the encoded audio signal recorded on the recording medium, and for performing special reproduction. Information, playback order information, playback range information,
Management information data access means for reading management information data for managing landmark information for random access from said recording medium through said file system means, or generating said management information data and writing it to said recording medium through said file system means A management information development memory, which is a memory for developing the management information data read out from the recording medium through the recording medium drive means, the file system means, and the management information access means;
A representative image data reading means for reading a representative image corresponding to the landmark information for random access from the recording medium through the file system.

Thus, it is possible to improve the display speed of the user interface for displaying the access point of the recording data using the representative image.

[0010]

Embodiments of the present invention will be described below with reference to the drawings by using examples. FIG. 1 is a block diagram showing an embodiment of a recording and reproducing apparatus according to the present invention, in which both blocks of a recording apparatus and blocks of a reproducing apparatus are shown. Hereinafter, these devices are collectively referred to simply as a recording / reproducing device. The recording / playback apparatus shown in the figure has an input terminal 100 for a management information development request signal for requesting development of management information data in a memory, an input terminal 120 for inputting a recording start / end signal for requesting start and end of recording, Image output terminal 130 for outputting the image data, management information data development processing unit 140, management information data development memory 150, entry point addition processing unit 160, file system processing unit 180, recording medium drive processing unit 190, recording medium 200 representative image decoding process Unit 210, GUI image output processing unit 2
20, an analog video signal input terminal 250, a video encoding processing unit 260, a representative image encoding processing unit 270, a multiplexing processing unit 280, an analog audio signal input terminal 290,
Audio encoding processing unit 310, buffer memory 320, buffer memory management unit 330, demultiplexing processing unit 340, video decoding processing unit 350, analog video signal output terminal 36
0, audio processing unit 370, analog audio signal output terminal 3
80, a recording unit information addition processing unit 390.

As a method of compressing video and audio data and recording it on a recording medium, for example, the MPEG method (Mo
Tion Picture Experts Grou
p). When the video and audio data are compressed and recorded on a recording medium by adopting the MPEG method, in order to realize random access and special reproduction, not only the information of the compressed bit stream but also other than that,
It is necessary to create management information data for random access and trick play and record it on the recording medium 200. Further, conventionally, in a thumbnail display in which a predetermined image is compressed from the beginning of a moving image of several recording units or displayed from the beginning and displayed on a display unit (not shown), an image to be displayed is extracted from a moving image stream and displayed. Processing for
This has the disadvantage that the display speed is slow. A file configuration of data recorded on the recording medium 200 for solving this disadvantage will be described with reference to FIG.

FIG. 2 is a diagram showing the structure of a data file recorded on a recording medium according to the present invention. For example, when video and audio data are compressed by the MPEG system and recorded on the recording medium, the recording is performed. FIG. 2 shows a file configuration of data recorded on the medium. For example,
When recording video data or audio data with a video camera, recording on the recording medium 200 is started when the recording start button of the recording device is pressed by the user, and is recorded on the recording medium when the recording end button of the recording device is pressed by the user. Stop recording. The period from the start to the end of recording is called a recording unit. By repeating the recording start and recording end operations, an MPEG-format bit stream is additionally recorded on the recording medium. At this time, the format of the multiplexing of the video data and the audio data is the format of the program stream of the MPEG system, and is recorded on the recording medium in that format.

As shown in FIG. 2, the files configured on the recording medium 200 are at least a moving picture stream file 20, a still picture stream file 21, and a management information data file 22, which are standardized. The representative image data file 23 is a file added according to the present invention.

If the moving image stream does not exist on the recording medium 200, the moving image stream file 20 does not exist. If no still image stream exists in the recording medium 200, the still image stream file 21 does not exist. The video stream file 20 and the still image stream file 21 have one or more streams, that is, one or more recording units.
The still image stream may be a still image stream alone or a still image stream with audio in which a still image and audio data are mixed.

Next, the data structure of the management information data file 22 will be described with reference to FIG. FIG. 3 is a configuration diagram showing the data configuration of the management data file. As shown in the figure, the management information data file 22 includes at least the moving image information table 30, the still image group information table 3,
1, original reproduction information 32, virtual reproduction information table 3
3 information is recorded. However, the moving image information table 30, the still image group information table 31, and the virtual reproduction information table 33 may not exist.

Information about each recording unit included in the moving picture stream file 20 is recorded in the moving picture information. The video information includes the video stream file 20
Information for facilitating random access to or special playback, for example, information relating a time stamp and a logical address, date / time information of a recording unit, and continuous reproduction of two recording units At times, information for seamlessly reproducing the joint is recorded. The respective pieces of moving image information are collectively referred to as a moving image information table 30.

The recording units included in the still image stream file 21 are grouped together by several numbers,
Information about this is recorded in the still image group information.
Still image stream file 2 is included in the still image group information.
1, information for facilitating random access and special reproduction, date and time information of a recording unit, and the like are recorded. Furthermore, the still image group information is divided into small units for each recording unit, and for each recording unit, information as to whether the image is a still image or a still image with sound,
Information such as the size of the still image and the playback time of the still image with sound is recorded. The respective still image group information is collectively called a still image group information table 31.

The original reproduction information 32 includes information for reproducing all recording units of the moving picture stream file 20 and the still picture stream file 21.

The virtual reproduction information table 33 stores the moving picture stream file 20 or the still picture stream file 2
1 is a list to be reproduced in a reproduction range and a reproduction order defined by the user. There is one or a plurality of lists to be reproduced in the reproduction range and the reproduction order defined by the user, each of which has almost the same structure as the original reproduction information 32.

Hereinafter, the original reproduction information and the virtual reproduction information will be described in more detail with reference to FIG. FIG. 4 is a configuration diagram showing a data configuration of the original reproduction information or the virtual reproduction information of the management information data file. As shown in the figure, the original playback information 32 or the virtual playback information 33
Is divided into reproduction unit information 41. Normally, the reproduction unit information in the original reproduction information 32 is arranged in the recording order. When a moving image is recorded, moving image reproduction unit information shown in FIG. 5 described later is recorded. When a still image is recorded, still image reproduction unit information shown in FIG. 6 described later is recorded. One of the virtual reproduction information is divided into reproduction unit information as shown in FIG. If the reproduction range defined by the user is a part of the moving image stream file 20, the moving image reproduction unit information shown in FIG. 5 is recorded. If the reproduction range is a part of the still image stream file 21, the still image reproduction shown in FIG. Unit information is recorded.

FIG. 5 is a configuration diagram showing the configuration of the moving image reproduction unit information of the management information data file. In the figure, a reproduction type 50 indicates information of a moving image or a still image.
In the case of, information that the object is a moving image is recorded. In the moving image information reference number 51, a reference number is recorded so as to refer to which moving image information in the moving image information table 30.
In the original playback information 32, the playback start time stamp 52 is usually
The start time stamp of the recording unit indicated by the moving image information referred to by the moving image information reference number 51 is recorded. In the original reproduction information 32, usually, the reproduction end time stamp 53
In the moving image stream file 20, the end time stamp of the recording unit indicated by the moving image information referenced by the moving image information reference number 51 is recorded.

In the virtual reproduction information table 33, the reproduction start time stamp 52 and the reproduction end time stamp 53 have values defined by the user, and the user can define the reproduction range. In the moving image entry point table 54, one or more marks (hereinafter, referred to as moving image entry points) for random access to the moving image stream file 20 are recorded. The moving image entry point indicates a time stamp.

FIG. 6 shows still picture reproduction unit information.
This will be described with reference to FIG. FIG. 6 is a configuration diagram showing the data configuration of the still image reproduction unit information of the management information data file. In the figure, the reproduction type 60 indicates information on whether the image is a moving image or a still image. In the case of FIG. 6, information indicating that the image is a still image is recorded. In the still image group information reference number 61, a reference number is recorded so as to identify which still image group information in the still image group information table 31. The reproduction start entry number 62 is the still image stream file 2
In 1, the number of the recording unit counted from the beginning of the range indicated by the still image group information referred to by the still image group information reference number 61 is recorded. That is, the reproduction start entry number 62 in the original reproduction information 32
Is always recorded as "1". Reproduction end entry number 6
Reference numeral 3 denotes the number of recording units in the range indicated by the still image group information referred to by the still image group information reference number 61 in the still image stream file 21. Also,
In the virtual reproduction information table 33, the reproduction start entry number 62 and the reproduction end entry number 63 have values defined by the user, and the user can define the reproduction range. In the still image entry point table 64, landmarks for random access to the still image stream file 21 (hereinafter, referred to as still image entry points, and in particular, moving images and still images are simply referred to as entry points). , One or more. The still image entry point indicates the number of the recording unit from the head of the still image group.

Next, a method for writing representative image data corresponding to a moving image entry point or a still image entry point to the recording medium 200 will be described with reference to FIG. In the figure, when the power is turned on or the like, the management information data recorded on the recording medium 200 is expanded in the management information data expansion memory 150 in the management information data expansion processing unit 140 via the input terminal 100 from a microcomputer (not shown). When the request signal is input, the management information data expansion processing unit 140
Instructs the file system processing unit 180 to read the management information data file 22 from the recording medium 200. The file system processing unit 180 instructs the recording medium drive processing unit 190 to read the data at the physical address of the recording medium 200. The recording medium drive processing unit 190 reads the data of the management information data file 22 from the recording medium 200 from the physical address of the recording medium 200 instructed by the file system processing unit 180.
The read data is stored in the file system processing unit 180.
Is transferred to the management information data expansion processing unit 140 and is expanded in the management information expansion data memory 150.

In the case of reproduction or special reproduction, information as to which data is necessary is input from a terminal 100 for inputting a request for expanding the management information data to the memory, to the management information data expansion processing section 140, and to the management information data expansion processing section 140. The management information data file 22 expanded in the expansion memory 150 is read, and the logical addresses of the moving image stream file 20 and the still image stream file 21 are stored in the buffer memory management unit 33.
Input to 0. In response to a request from the buffer memory management unit 330, the file system processing unit 180 instructs the recording medium drive processing unit 190 to read information corresponding to the logical address from the recording medium 200. This information is stored in the buffer memory 320 through the file system processing unit 180 and the buffer memory management unit 330.

Image data and audio data temporarily stored in the buffer memory 320 and required for reproduction or special reproduction are separated into image data and audio data by a separation unit 340, and the image data is subjected to video decoding processing. The signal is decoded by the unit 350 and output from the terminal 360 as an analog video signal. The audio data is decoded by the audio decoding processing unit 370 and output from the terminal 380 as an analog audio signal.

Input terminal 1 for management information data access request
When a request to write the data of the management information data development memory 150 to the recording medium 200 is received from 00, the management information data development processing unit 140
An instruction to create the management information data file 22 from the data of 0 is output to the file system processing unit 180. Upon receiving the command, the file system processing unit 180 transfers the data transferred from the management information data expansion processing unit 140 and the physical address of the location on the recording medium 200 to be written to the recording medium drive processing unit 190, and 200 is instructed to write the management information data file 22. Upon receiving the instruction, the recording medium drive processing unit 190 writes the management information data file 22 on the recording medium 200.

When an image recording start signal is input to the terminal 120, the recording start signal is transmitted to the recording unit information addition processing section 39.
0, input to the entry point addition processing section 160, the video coding processing section 260, and the audio coding processing section 310, and the start of recording is notified, and an analog video signal is input from the terminal 250, and the video coding processing is performed. The data is encoded by the unit 260 and input to the multiplex processing unit 280. Further, the analog audio signal input from terminal 290 is encoded by audio encoding processing section 310 and input to multiplexing processing section 280. The video signal and the encoded audio signal encoded by the multiplexing processing unit 280 are temporarily stored in the buffer memory 320 after being multiplexed.

An image at a predetermined position from the start of recording is taken out from the video encoding unit 260 as a representative image, a reduced image is created by the representative image encoding unit 270, and the reduced image is input to the file system processing unit 180. Is done. The representative image is stored in the recording medium 2 by the recording medium drive processing unit 190 based on a command from the file system processing unit 180.
00 is written to the representative data file 23. Also,
Management information data such as moving image information and still image information is input from the multiplexing processing unit 280 to the recording unit information addition processing unit 390, and is written to the management information data development memory 150.
Also, the recording start signal is sent to the entry point addition processing unit 16.
Request entry of an entry point by entering 0. Therefore, the data of the management information data file 22 expanded in the management information data expansion memory 150 is accessed by the recording start signal, and after the recording is started by the entry point addition processing unit 160, the image at the predetermined position is For example, an entry point is added to a designated reproduction position such as the first image, and the management data expansion memory 1 is added.
Store in 50.

The recording operation is terminated by the recording end signal input to the terminal 120, and the image data and audio data stored in the buffer memory 320 are stored in the buffer memory management unit 330, the file system processing unit 180, and the recording medium drive processing unit. 190, the recording medium 2
Written to 00. If the image to be recorded is a moving image, it is written to the moving image stream file 20 of the recording medium 200, and if it is a still image, it is written to the still image stream file 21 of the recording medium 200. Also, management information data of the recorded image added to the management information data development memory 150,
The association information between the representative image data and the entry point (such as the association information between the time stamp and the logical address) is input to the management information data development processing unit 140, and the file system processing unit receives an instruction from the management information data development processing unit 140. 180 is operated, and the recording drive processing unit 190 is operated in accordance with a command from the file system processing unit 180, so that the data is written into the management data file 22 of the recording medium 200.

In this embodiment, a representative image is displayed for each entry point, and the contents of the recording medium 200 are visually shown to the user or the displayed representative image is selected by the user. When realizing a user interface that reproduces data of the recording medium 200 indicated by the entry point associated with the representative image, it is possible to create the representative image data file 23 for improving the display speed of the representative image. it can. That is, in this embodiment, since the reduced image of the representative image is recorded in the representative image data file 23 of the recording medium 200, the display speed can be improved when the contents of the recording medium 200 are, for example, displayed in a signage. .

Next, a case where a representative image of an image recorded on the recording medium 200 is output will be described with reference to FIG. When a representative image output request is input to the terminal 100 from a microcomputer (not shown) in response to a representative image output request from the user, the management information data development processing unit 140 transmits the representative image data from the management information data development memory 150 to the The entry point association information is read, and the recording medium drive processing unit 19 is read through the file system processing unit 180.
Drive 0. The recording medium drive processing unit 190 reduces the size of the representative image data file 23 recorded on the recording medium 200 from the recording medium 200 based on the information indicating which entry point is pointing and the association information of the representative image data. The representative image data thus read is read out and temporarily stored in the buffer memory 320 by the buffer memory management unit 330. The representative image data read from the buffer memory 320 by the buffer memory management unit 330 is supplied to the representative image decoding processing unit 210, where it is decoded. The decoded representative image signal is processed by the GUI output processing unit 220 so that it can be output as a GUI image, and the reduced representative image is displayed on the display unit (not shown) from the terminal 130.

In this embodiment, the representative image is recorded on the recording medium 200 by adding an entry point to each of the representative images. Therefore, the contents of the recording medium 200 are visually displayed or the displayed representative image is displayed. When a user interface is realized such that the user selects an image and reproduces data of the recording medium 200 indicated by the entry point associated with the representative image, the display speed of the representative image can be improved. .

[0034]

As described above, in the present invention,
It is possible to improve the display speed of the user interface that displays the access point of the recorded data using the representative image.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a recording and reproducing apparatus according to the present invention.

FIG. 2 is a configuration diagram showing a configuration of a data file recorded on a recording medium according to the present invention.

FIG. 3 is a configuration diagram showing a data configuration of a management data file.

FIG. 4 is a configuration diagram showing a data configuration of original reproduction information or virtual reproduction information of a management information data file.

FIG. 5 is a configuration diagram showing a configuration of moving image reproduction unit information of a management information data file.

FIG. 6 is a configuration diagram showing a data configuration of still image reproduction unit information of a management information data file.

[Explanation of symbols]

100 ... input terminal of management information data access processing request,
120: recording start and end signal input terminals, 130: GU
I image output terminal, 140 management information data expansion processing unit, 1
50: management information data development memory, 160: entry point addition processing unit, 180: file system processing unit
190: recording medium drive processing unit, 200: recording medium,
210: representative image decoding processing unit, 220: GUI image processing unit, 260: video encoding processing unit, 270: representative image encoding processing unit, 280: multiplex processing unit, 310: audio encoding processing unit, 320 ... Buffer memory, 330: buffer memory management unit, 340: separation processing unit, 350: video decoding unit, 370: audio decoding processing unit.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/76 H04N 5/91 J 5/91 5/92 H 5/92 G11B 27/02 A F term ( Reference) 5C052 AA01 AB05 AC08 CC11 DD04 EE03 5C053 FA07 FA10 GA11 GB06 GB08 GB37 GB40 HA29 JA03 JA22 5D044 AB05 AB07 DE02 DE03 DE17 DE24 DE48 DE49 EF05 FG18 GK08 HL14 5D077 DC22 DC25 EA01 EA34 DC01A01 DC01

Claims (5)

[Claims] 1. A video signal recording means for recording an encoded video signal on a recording medium, and means for applying mark information to a representative image signal corresponding to an image at a predetermined position of a video signal in a recording unit from recording start to recording end Mark adding means for adding, and management information recording for adding mark information added by the mark adding means to management information data for accessing a video signal recorded by the video signal recording means and recording the information on the recording medium And a recording unit for recording the representative image signal on the recording medium. 2. A recording apparatus according to claim 1, wherein said representative image signal is recorded on said recording medium after the image is reduced. 3. A recording apparatus for recording, on a recording medium, information obtained by multiplexing an encoded video signal and an encoded audio signal on a recording medium, wherein the information is read from the recording medium and the information is stored on the recording medium. Recording medium, and information read directly by the recording medium drive in a predetermined file format, and information for directly writing in the recording medium drive is converted to a predetermined file format. File system means, information for random access to information obtained by multiplexing the encoded video signal and the encoded audio signal recorded on the recording medium, information for performing special reproduction, The management information data for managing the information on the reproduction order, the information on the reproduction range, and the landmark information for random access is read from the recording medium. A management information data access unit for reading through the file system unit or generating the management information data and writing the management information data on the recording medium through the file system unit; a recording medium drive unit from the recording medium; the file system unit; A management information data expansion memory for expanding the management information data read through the management information access means; an entry point addition means for adding landmark information for an image at a predetermined position from the start of recording to the management information data for recording; A representative image data writing unit for writing a representative image corresponding to the mark information to the recording medium through the file system. 4. An encoded video signal recorded on a recording medium on which an encoded video signal, a representative image signal of a recording unit from recording start to recording end, and management information data are recorded. A video signal reading means for reading out from the video signal, mark information added to a representative image signal corresponding to an image at a predetermined position of the video signal of the recording unit, and information for accessing the video signal recorded on the recording medium. Information access means for reading the management information data from the recording medium and developing the information in a memory, wherein the information access means reproduces the representative image signal from the recording medium using mark information corresponding to a signal requesting to read a representative image. A reproducing apparatus characterized in that: 5. A reproducing apparatus for a recording medium on which information obtained by multiplexing an encoded video signal and an encoded audio signal is recorded, wherein the information is directly read from the recording medium or the information is directly written. Recording medium drive means for reading information read by the recording medium drive means in a predetermined file format, and file system means for setting information to be written in the recording medium drive means to a predetermined file format. Information for random access to information obtained by multiplexing an encoded video signal and an encoded audio signal recorded on the recording medium, information for special reproduction, and reproduction. Management information data for managing order information, reproduction range information, and landmark information for random access is stored in the storage medium from the storage medium. Management information data access means for reading through the file system means or generating the management information data and writing the management information data to the recording medium through the file system means; from the recording medium, the recording medium drive means; the file system means; Through the management information access means,
Reading out the management information data read out from the recording medium through the file system, reading out the management information expansion memory which is a memory for expanding the read out management information data, and the representative image corresponding to the mark information for random access through the file system; Means for reproduction.