JP2004048685A - Video recording and reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a file structure of a recording medium for adding novel information to video information already recorded in the recording medium and a method of utilizing the file structure without lowering the utilization efficiency of the recording medium in a video recording and reproducing device for recording video by using a disk as the recording medium. <P>SOLUTION: Additional information to be added to the video information already recorded on the recording medium is recorded on the disk-like recording medium as a file different from the video information together with time information to reproduce the additional information synchronously with the video information so as to eliminate necessity to secure a region for recording the additional information in advance within a file where the video information is to be recorded. Besides, by reading the additional information, the time information and the video information recorded in the different files, the additional information is added to the video information by reproducing the additional information and the video information recorded in the file different from that of the additional information on the basis of the time information. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL 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]
[Prior 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, and further recording video information. Thereafter, an additional information area for additionally recording new audio information was previously secured. 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 96-97 pages)
As described above, in the conventional apparatus using a tape as a recording medium, the additional information area is secured when recording video information regardless of whether new information is added or not. 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 that records a video using a disk as a recording medium, if a file structure that previously secures an area for recording additional information employed in a video recording / reproducing apparatus that uses a tape as a recording medium is adopted, As in the video recording / reproducing apparatus using a tape as a recording medium, the use efficiency of the recording medium cannot be reduced.
[0004]
[Problems to be solved by the invention]
The present invention relates to a video recording / reproducing apparatus that uses a disc as a recording medium and records video, and adds new information to video information already recorded on the recording medium without reducing the use efficiency of the recording medium. It is an object of the present invention to provide a file structure that can be used and a method of using the file structure.
[0005]
[Means for Solving the Problems]
By recording additional information to be added to the video information already recorded on the disc-type recording medium, together with time information for synchronous reproduction with the video information, as a file separate from the video information on the disc-type recording medium, This eliminates the need to previously secure an area for recording additional information in a file in which the video information is recorded. Also, the additional information and the time information and the video information recorded in separate files are read out, 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]
BEST MODE FOR CARRYING OUT THE INVENTION
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.
[0007]
Hereinafter, FIG. 1 will be described.
[0008]
Reference numerals 101, 102, 103, 104, 105, 106, and 107 are elements constituting a file for recording video information and audio information input to the apparatus. Hereinafter, a file composed of 101, 102, 103, 104, 105, 106, and 107 is referred to as a “video information file”.
[0009]
Reference numeral 101 denotes a header indicating the attribute, size, configuration, and the like of the video information file.
[0010]
Reference numerals 102, 103, 104, 105, 106, and 107 have the same structure, and are frames composed of 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 set to six for ease of explanation, but the number of frames actually increases or decreases according to the video recording time.
[0011]
Reference numerals 108, 109, and 110 are elements constituting frames in the video information file.
[0012]
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.
[0013]
Reference numeral 109 denotes a video information area in which video information input to the device is recorded.
[0014]
Reference numeral 110 denotes an audio information area in which audio information input to the device is recorded.
[0015]
Reference numerals 111, 112, 113, 114, 115, 116 and 117 are elements constituting a file for adding new information to the video information file. Hereinafter, a file composed of 111, 112, 113, 114, 115, 116, and 117 is referred to as an “additional information file”.
[0016]
Reference numeral 111 denotes a header indicating the attribute, size, configuration, and the like of the additional information file.
[0017]
Reference numerals 112, 113, 114, 115, 116 and 117 have the same structure, and are frames constituted by a time information area and an additional information area. Each of the frames 112 to 117 plays a role of adding information to a corresponding frame in the video information file.
[0018]
Reference numerals 118 and 119 denote elements constituting frames in the additional information file.
[0019]
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, when the information of the frame 112 of the additional information file is to be added to the information of the frame 102 of the video information file, the time information recorded in the time information area in the frame 102 is recorded in the time information area in the frame 112. do it.
[0020]
Reference numeral 119 denotes an additional information area in which additional information is recorded in the device. The additional information is a voice, a character, an illustration, or the like.
[0021]
Next, FIG. 5 shows the structure of a file used in a conventional device to explain the effect of the present invention.
[0022]
Reference numerals 501, 502, 503, 504, 505, 506, and 507 are elements constituting a file for recording video information, audio information, and additional information input to the apparatus. Hereinafter, a file composed of 501, 502, 503, 504, 505, 506, and 507 is referred to as an "old video information file".
[0023]
Reference numeral 501 denotes a header indicating the attribute, size, configuration, and the like of the old video information file.
[0024]
Reference numerals 502, 503, 504, 505, 506, and 507 have the same structure, and are frames composed of a time information area, a video information area, an audio information area, and an additional information area. A frame is a 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.
[0025]
Reference numerals 508, 509, 510, and 511 are elements constituting frames in the old video information file.
[0026]
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.
[0027]
Reference numeral 509 denotes a video information area in which video information input to the device is recorded.
[0028]
Reference numeral 510 denotes an audio information area in which audio information input to the device is recorded.
[0029]
Reference numeral 511 denotes an additional information area for adding new information to the video information 509.
[0030]
As described above, the file used in the conventional device 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 if the device user has determined that additional information will be recorded later, but if the user does not intend to record the additional information, or if it is undecided, the secured additional information area will be 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.
[0031]
On the other hand, in the present invention shown in FIG. 1, video information / audio information and additional information are recorded in different files. Thus, an additional information file may be created when new information is added, and the additional information recording area secured since the additional information generated in the conventional device is not recorded is not wasted. Since the additional information file is created when adding new information, the file size can be arbitrarily determined.
[0032]
Further, 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 recorded in a time information recording area of each frame between the additional information files is combined. Otherwise, multiplexing of additional information is possible. In addition, by preparing a plurality of additional information files, it is possible to use information to be actually added properly depending on the case.
[0033]
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.
[0034]
For example, when it is not necessary to add information to the frames 104 and 106 of the video information file, 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 apparatus, the additional information area is secured in each frame regardless of whether the file is used or not used as shown in FIG. If used, such a problem can be solved.
[0035]
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 is reproduced by the time information recorded in each frame. Since the time can be managed, information is not added to a frame other than the corresponding frame in the video information file.
[0036]
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. When the frame 113 of the additional information file is added to the frame 107, the additional information file shown in FIG. By repeatedly using the additional information file having two frames 112 and 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.
[0037]
FIG. 4 shows a video recording / reproducing apparatus using a file according to the present invention.
[0038]
Reference numeral 401 denotes a disk-type recording medium that records information input to video, audio, text, and other devices.
[0039]
Reference numeral 402 denotes a disk recording / reproducing unit that performs a recording operation and a reproduction operation on the disk-type recording medium 401.
[0040]
Reference numeral 403 denotes a recording processing unit that performs processing such as connection of information, addition of time information, addition of an error correction code, and modulation to various types of information input to the apparatus.
[0041]
Reference numeral 404 denotes a video information input unit that compresses video information input to the apparatus, temporarily stores the information after adding time information.
[0042]
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 audio compression ratio so that more audio information can be recorded.
[0043]
Reference numeral 406 denotes character information input means for compressing additional information such as characters, illustrations, and thumbnails input to the apparatus and temporarily storing the compressed information.
[0044]
Reference numeral 407 denotes time information providing means for providing time.
[0045]
A reproduction processing unit 408 performs demodulation processing, error correction processing, information separation processing, and the like on information reproduced from the disk-type recording medium.
[0046]
Reference numeral 409 denotes a video information output unit that temporarily stores and decompresses the video information sent from the reproduction processing unit 408, and outputs the video information.
[0047]
Reference numeral 410 denotes an audio information output unit that temporarily stores and decompresses the audio information sent from the reproduction processing unit 408, and outputs the audio information.
[0048]
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 the information.
[0049]
Reference numeral 412 denotes a disk driving unit that fixes and rotates the disk-type recording medium.
[0050]
A system control unit 413 manages and controls each processing unit in the apparatus.
[0051]
Hereinafter, it is assumed that a video information file including 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.
[0052]
(1) The video information file reproduced from the disk type recording medium 401 by the disk recording / reproduction means 402 is sent to the video information output means 409 via the reproduction processing means 408, and the video is output.
[0053]
(2) The device user inputs audio from the audio input unit 405 in synchronization with the video information output from the video information output unit 409. The sound input to the sound input means 405 is compressed and sent to the recording processing means 408 in frame units.
[0054]
(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.
[0055]
(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.
[0056]
(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 reproduced synchronously is recorded on the disk-type recording medium by the system control means 413. You.
[0057]
The input of the voice as the additional information is completed by the above operations (1) to (5).
[0058]
Next, reproduction of the video information file and the additional information file will be described.
[0059]
(6) After reading the management file recorded by the operation (5) from the disk-type recording medium 401 and confirming that the video information file and the additional information file are files to be synchronously reproduced,
The video information file and the additional information file are reproduced from the disc type recording medium 401.
[0060]
(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. Thereafter, the video information is sent to the video output means 409 and the audio information is sent to the audio output means 410 in frame units according to the time information.
[0061]
(8) In the video information output means 409, the frames of the video information sent are arranged according to the time information and are temporarily stored. Also in the audio information output means 410, the frames of the transmitted audio information are arranged according to the time information and are temporarily stored.
[0062]
(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.
[0063]
(10) In the additional information output unit 411, the frames of the transmitted audio information are arranged according to time information and temporarily stored.
[0064]
(11) The video 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, respectively, so that video information, audio information, and additional information can be obtained. It is possible to realize that certain audio information is reproduced synchronously and new audio information is added to the video information.
[0065]
In the above description, the case where voice 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 unit 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 in the reproduction processing means 408 and output from the video information output means 409.
[0066]
Further, the additional information file can be used for purposes other than the synchronous reproduction with the video information file.
[0067]
For example, thumbnail information obtained by converting one screen representing video information into a thumbnail from the additional information input unit 406 is input and recorded as additional information. By doing so, various video information files recorded on the disk-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. In addition, 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]
【The invention's effect】
According to the present invention, in a video recording / reproducing apparatus that records a video using a disk as a recording medium, additional information for video information already recorded on a recording medium is a reference for synchronously reproducing the video information and the additional information. By recording on the disk-type recording medium as a file separate from the video information together with the time information, it is possible to prevent a decrease in the use efficiency of the recording medium, and at the same time, play back the additional information together with the video information based on the time information. By doing so, 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

Claims (4)

A disc as a recording medium, in a video recording and reproducing apparatus for recording video, additional information for video information already recorded on the recording medium, along with time information as a reference for synchronously reproducing the video information and the additional information, Video recording / reproducing, wherein after recording on the disc recording medium as a file separate from the video information, the additional information is reproduced together with the video information based on the time information to add information to the video information. apparatus. 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. Video recording and playback device. 2. 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. Video recording and playback device. 2. 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. Video recording and playback device.

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