JPH11205727A - Video recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a file structure by which new information is added to video information recorded on a recording medium without reducing the utility efficiency of the recording medium and to provide the utilizing method of the file structure in the case of recording a video image on a disk that is the recording medium. SOLUTION: Additional information 119 to be added to video information 109 having already been recorded on a recording medium is recorded on a recording disk medium as other file than that of the video information 109 together with time information 118 to be synchronously reproduced with the video information 109 to eliminate the need for reserving in advance an area to record the additional information in the file on which the video information 109 is recorded. Furthermore, the additional information, the time information and the video information recorded on separate files are read and the additional information is reproduced with the video information recorded on other file than that of the additional information based on the time information to add information to the video information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for adding new information to video information already recorded on a disk-type recording medium in an apparatus for recording video on a disk-type recording medium.

[0002]

2. Description of the Related Art In a conventional video recording / reproducing apparatus for recording video information on a tape, a video area for recording video information on a tape, an audio area for recording audio information input simultaneously with the video information, Further, after recording the video information, an additional information area for additionally recording new audio information has been secured in advance. As a practical example, in a digital video camera using a mini DV standard tape as a recording medium, two channels for recording audio information are provided on the tape, and the first channel records audio information input simultaneously with video information. The second channel is reserved as an area for recording newly added audio information. (Panasonic Digital Video Camera Instruction Manual pages 96 to 97) As described above, in the conventional apparatus using a tape as a recording medium, the additional information area records video information regardless of whether new information is added or not. When was secured.
Therefore, when a new voice is not added, the additional information area is left to play, and the use efficiency of the recording medium is reduced.

[0003] Also, in a video recording / reproducing apparatus for recording video using a disk as a recording medium, a file structure for preliminarily securing an area for recording additional information employed in a video recording / reproducing apparatus using a tape as a recording medium is also used. When adopted, the use efficiency of the recording medium cannot be reduced as in the video recording / reproducing apparatus using a tape as a recording medium.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a video recording / reproducing apparatus for recording video using a disk as a recording medium without reducing the use efficiency of the recording medium. It is an object to provide a file structure capable of adding new information to video information and a method of using the file structure.

[0005]

According to another aspect of the present invention, there is provided a method for reproducing additional information added to video information already recorded on a disk-type recording medium together with time information for synchronously reproducing the video information, and a file separate from the video information. By recording on the type recording medium, it is not necessary to previously secure an area for recording additional information in a file in which the video information is recorded. Further, the additional information, the time information, and the video information recorded in separate files are read, and the additional information is stored in a file different from the additional information based on the time information. The information is added to the video information by being reproduced together with the video information.

[0006]

FIG. 1 shows the structure of a file according to the present invention used in a video recording / reproducing apparatus for recording video using a disk as a recording medium.

FIG. 1 will be described below.

[0008] 101, 102, 103, 104, 10
Reference numerals 5, 106, and 107 are elements constituting a file for recording video information and audio information input to the apparatus. Hereinafter, 101, 102, 103, 104, 105,
The file constituted by 106 and 107 is called a “video information file”.

Reference numeral 101 denotes a header indicating the attribute, size, configuration, and the like of the video information file.

102, 103, 104, 105, 10
Reference numerals 6 and 107 have the same structure, and are frames constituted by a time information area, a video information area, and an audio information area. A frame is one unit of recording and reproduction of video information and audio information. In FIG. 1, the number of frames is six for ease of explanation, but the number of frames actually increases or decreases according to the video recording time.

Reference numerals 108, 109 and 110 are elements constituting frames in the video information file.

Reference numeral 108 denotes a time information area in which time information indicating the reproduction timing of video information and audio information in a frame is recorded.

Reference numeral 109 denotes a video information area in which video information input to the apparatus is recorded.

Reference numeral 110 denotes an audio information area in which audio information input to the apparatus is recorded.

111, 112, 113, 114, 11
Elements 5, 116, and 117 constitute a file for adding new information to the video information file.
Hereinafter, 111, 112, 113, 114, 115, 11
6, 117 is referred to as an "additional information file."

Reference numeral 111 denotes a header indicating the attribute, size, configuration, and the like of the additional information file.

112, 113, 114, 115, 11
Reference numerals 6 and 117 denote frames having the same structure, and are constituted by a time information area and an additional information area. 112 ~
Each frame 117 serves to add information to a corresponding frame in the video information file.

Reference numerals 118 and 119 are elements constituting a frame in the additional information file.

Reference numeral 118 denotes a time information area in which time information indicating the reproduction timing of the additional information in the frame is recorded. By recording the time information in the time information area 118, it is possible to add information to an arbitrary frame of the video information file. For example, the information of the frame 102 of the video information file is added to the frame 11 of the additional information file.
If it is desired to add the second information, the time information recorded in the time information area in the frame 102 may be recorded in the time information area in the frame 112.

Reference numeral 119 denotes an additional information area in which additional information is recorded on the apparatus. The additional information is a voice, a character, an illustration, or the like.

Next, FIG. 5 shows the structure of a file used in a conventional apparatus for explaining the effect of the present invention.

501, 502, 503, 504, 50
Reference numerals 5, 506, and 507 are elements constituting a file for recording video information, audio information, and additional information input to the apparatus. Hereinafter, 501, 502, 503, 504,
The file constituted by 505, 506, and 507 is called an "old video information file".

Reference numeral 501 denotes a header indicating the attributes, size, configuration, and the like of the old video information file.

502, 503, 504, 505, 50
Reference numerals 6 and 507 denote frames having the same structure, and include a time information area, a video information area, an audio information area, and an additional information area. A frame is one unit of recording and reproduction of video information, audio information, and additional audio. Although the number of frames is six in FIG. 5, the number of frames actually increases or decreases according to the video recording time.

Reference numerals 508, 509, 510, and 511 are elements constituting frames in the old video information file.

Reference numeral 508 denotes a time information area in which time information indicating the reproduction timing of the video information, audio information, and additional information in the frame is recorded.

Reference numeral 509 denotes a video information area in which video information input to the apparatus is recorded.

Reference numeral 510 denotes an audio information area in which audio information input to the device is recorded.

Reference numeral 511 denotes an additional information area for adding new information to the video information 509.

The file used in the conventional apparatus described above has a structure in which the additional information area is secured in the same file as the video information and the audio information. Such a file structure is good when the device user has determined that additional information will be recorded later. However, if the user does not intend to record the additional information, or if it is undecided, the secured additional information area is wasted. Thus, there is a possibility that the use efficiency of the recording medium is reduced. Further, since the additional information area is reserved in advance, additional information exceeding the recording size of the additional information area could not be recorded.

On the other hand, in the present invention shown in FIG.
Record audio information and additional information in different files. Thus, it is sufficient to create an additional information file when adding new information, and the additional information recording area secured since the additional information generated in the conventional device is not recorded is not wasted. Further, since the additional information file is created when new information is added, the file size can be arbitrarily determined.

A plurality of additional information files shown in FIG. 1 are prepared, different additional information is recorded in each additional information file, and time information to be recorded in a time information recording area of each frame between the additional information files is provided. , Additional information can be multiplexed. Further, by preparing a plurality of additional information files, it is possible to use information to be actually added properly depending on the case.

FIG. 2 shows another structure of the additional information file according to the present invention. As shown in FIG. 1, the video information file is composed of six frames, and when it is desired to add information to each frame, the additional information file may be composed of six frames. However, when it is not necessary to add information to all frames of the video information file, the additional information file does not need to have six frames.

For example, the frame 10 of the video information file
If it is not necessary to add information to the frame 4 and the frame 106, the additional information file may be used with the frame shown in FIG. By configuring the additional information file with four frames as shown in FIG. 2, the file size can be reduced. In the file used in the conventional device, the additional information area is secured in each frame regardless of whether the file is used or not, as shown in FIG. If used, such a problem can be solved.

While the video information file is composed of six frames, the additional information file is composed of four frames. Each frame of the additional information file has the time recorded in each frame. Since the reproduction time can be managed by the information, the information is not added to the other frames in the video information file.

FIG. 3 shows another structure of the additional information file according to the present invention. When it is not necessary to add different information to the frames of the video information file, for example, the information of the frame 112 of the additional information file is added to the frames 102, 104, and 106 of the video information file, and the frames 103 and 105 are added. , Frame 1
When the frame 113 of the additional information file is added to 07, the additional information file shown in FIG. 3 is used. By repeatedly using the additional information file having two frames of the frame 112 and the frame 113 shown in FIG. 3, information is stored in each of the six frames of the video information file without having six frames in the additional information file. It is possible to add.

FIG. 4 shows a video recording / reproducing apparatus using a file according to the present invention.

Reference numeral 401 denotes a disk type recording medium for recording information input to video, audio, text, and other devices.

Reference numeral 402 denotes a disk recording / reproducing means for performing a recording operation and a reproducing operation on the disk type recording medium 401.

Reference numeral 403 denotes connection of information, addition of time information, addition of an error correction code to various information input to the apparatus,
This is a recording processing unit that performs processing such as modulation.

Reference numeral 404 denotes video information input means for compressing the video information input to the apparatus, temporarily adding the time information, and then temporarily storing the compressed information.

Reference numeral 405 denotes voice information input means for compressing voice information input to the apparatus and temporarily storing the voice information. When the remaining capacity of the disk-type recording medium is equal to or less than a predetermined reference, the bit rate of the audio information is reduced by increasing the compression ratio of the audio so that more audio information can be recorded.

Reference numeral 406 denotes character information input means for compressing and temporarily storing additional information such as characters, illustrations, and thumbnails input to the apparatus.

Reference numeral 407 denotes time information providing means for providing time.

Reference numeral 408 denotes reproduction processing means for performing demodulation processing, error correction processing, information separation processing, and the like on information reproduced from the disk-type recording medium.

Reference numeral 409 denotes a video information output means for temporarily storing and decompressing the video information sent from the reproduction processing means 408 and outputting the processed video information.

Reference numeral 410 denotes audio information output means for temporarily storing and expanding the audio information sent from the reproduction processing means 408 and then outputting the audio information.

Reference numeral 411 denotes an additional information output unit that temporarily stores and decompresses the additional audio information sent from the reproduction processing unit 408, and outputs it.

Numeral 412 is a disk drive for fixing and rotating the disk type recording medium.

A system control unit 413 manages and controls each processing unit in the apparatus.

Hereinafter, it is assumed that a video information file composed of video information and audio information has already been recorded on the disk type recording medium 401, and a case where audio information is added to the video information file will be described.

(1) The video information file reproduced from the disk type recording medium 401 by the disk recording / reproducing means 402 is sent to the video information output means 409 via the reproduction processing means 408 to output the video.

(2) The user of the apparatus can output the video information output means 40
The audio is input from the audio input unit 405 in synchronization with the video information output from the input unit 9. The sound input to the sound input means 405 is compressed and recorded in the recording processing means 4 in units of frames.
08.

(3) The recording processing means 408 sequentially adds time information, adds an error correction code, and modulates the audio information sent in frame units, and then sends the audio information to the disk recording / reproducing means 402. .

(4) The audio information sent to the disk recording / reproducing means 402 is recorded on the disk type recording medium 401 without the need to reproduce the video information file.

(5) When the sound input is completed, the header of the sound information created by the system control means 413 is recorded on the disk type recording medium, and forms an additional information file together with the sound information. At this time, a management file indicating that the additional information file and the video information file already recorded on the disk-type recording medium 401 are files to be synchronously reproduced is recorded on the disk-type recording medium by the system control unit 413. You.

By the above operations (1) to (5), the input of the voice as the additional information is completed.

Next, reproduction of the video information file and the additional information file will be described.

(6) The management file recorded by the operation (5) is read from the disk-type recording medium 401, and after confirming that the video information file and the additional information file are files to be reproduced synchronously, From 401, the video information file and the additional information file are reproduced.

(7) The reproduced video information file is demodulated by the reproduction processing means 408, separated into time information, video information, and audio information, and subjected to error correction processing.
Then, according to the time information, the video information is output to the video output means 4.
In step 09, the audio information is sent to the audio output unit 410 in frame units.

(8) In the video information output means 409, the frames of the transmitted video information are arranged according to time information and are temporarily stored. The audio information frames transmitted from the audio information output unit 410 are arranged according to time information,
Temporarily stored.

(9) The reproduced additional information file is demodulated by the reproduction processing means 408, separated into time information and audio information, and subjected to error correction processing. After that, the audio information is sent to the additional information output unit 411 in frame units according to the time information.

(10) The additional information output means 411 arranges the frames of the transmitted audio information in accordance with the time information.
Temporarily stored.

(11) The image information output means 409, the audio information output means 410, and the additional information output means 410 read the sequence of frames stored in accordance with the time information at the same time, thereby sequentially obtaining the video information, the audio information, and the The audio information, which is the additional information, is synchronously reproduced, and new audio information can be added to the video information.

In the above description, the case where audio information is added has been described. However, when the information to be added is a character or an illustration, character information is input from the additional information input means 406. In addition, as for the time information to be connected to the character information, the time information of the frame of the video information to which the character information is to be added may be read in advance and connected to the character information. At the time of reproduction, character information or illustration information may be superimposed on the reproduction processing means 408 and output from the video information output means 409.

It is also possible to use the additional information file for purposes other than synchronizing playback with the video information file.

For example, thumbnail information obtained by converting one screen representing video information into a thumbnail from the additional information input means 406 is input and recorded as additional information. By doing so, various video information files recorded on the disc-type recording medium can be listed by thumbnails. In addition, if character information such as a comment on a video information file and thumbnail information are recorded as an additional information file, it is possible to create a more detailed list of recorded contents of the disk-type recording medium. Also, if the time providing means 407 is used, the latest time at which the video information was reproduced can be recorded as additional information, and by confirming the recorded latest time, a person other than the one who performed the reproduction operation of the video information can obtain the video information. It is possible to manage whether or not the data has been reproduced.

[0068]

According to the present invention, in a video recording / reproducing apparatus for recording video using a disk as a recording medium, additional information for video information already recorded on the recording medium is synchronized with the video information and the additional information. Along with the time information serving as a reference to be reproduced, the reduction in the use efficiency of the recording medium is prevented by recording the file on the disc-type recording medium as a file separate from the video information, and the additional information is based on the time information. By reproducing the video information together with the video information, information can be added to the video information.

[Brief description of the drawings]

FIG. 1 is a first example of the structure of a video information file and the structure of an additional information file according to the present invention.

FIG. 2 is a second example of the structure of an additional information file according to the present invention.

FIG. 3 is a third example of the structure of an additional information file according to the present invention.

FIG. 4 is an example of an apparatus configuration for realizing the present invention.

FIG. 5 is an example of a file structure used in a conventional device.

[Explanation of symbols]

 101 ... header 102 ... frame 108 ... time information area 109 ... video information area 110 ... audio information area 110 ... additional information area 401 ... disk type recording medium 402 ... Disc recording / reproducing means 403 Recording processing means 404 Video information input means 405 Audio information input means 406 Additional information input means 407 Time information providing means 408 Reproduction processing means 409 ... video information output means 410 ... audio information output means 411 ... additional information output means 412 ... disk drive means 413 ... system control means

Continuing on the front page (72) Inventor Tamotsu Ito 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Multimedia Systems Development Headquarters, Hitachi, Ltd. Hitachi, Ltd. Multimedia System Development Division

Claims (4)

[Claims] 1. A video recording / reproducing apparatus for recording video using a disk as a recording medium, wherein additional information for video information already recorded on the recording medium is used as a reference for synchronously reproducing the video information and the additional information. After recording on the disk recording medium as a file separate from the video information together with the time information, the additional information is added to the video information by reproducing the additional information together with the video information based on the time information. Video recording and playback device. 2. The video recording / reproducing apparatus according to claim 1, wherein the additional information is audio information, and the audio information is added to the video information by reproducing the audio information together with the video information based on time information. A video recording / reproducing apparatus characterized by the above-mentioned. 3. The video recording / reproducing apparatus according to claim 1, wherein the additional information is character information, and the character information is added to the video information by reproducing the character information together with the video information based on time information. A video recording / reproducing apparatus characterized by the above-mentioned. 4. The video recording / reproducing apparatus according to claim 1, wherein the additional information is illustration information, and the illustration information is added to the video information by reproducing the illustration information together with the video information based on time information. A video recording / reproducing apparatus characterized by the above-mentioned.