Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1997-10-31
2003-08-26
Nguyen, Huy (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000
Reexamination Certificate
active
06611652
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a video data recording and reproducing system, an audio and/or video data recording and reproducing apparatus and a system for the same, and a data reproducing means for recording audio and video data, or one of the same (audio and/or video data), of digital format and reproducing the recorded audio and/or video data.
BACKGROUND ART
For example, in a television broadcasting station, a video to be telecast in a news program etc. is usually produced by recording the videos (source video or stock videos) and sound serving as the basis of the video to be telecast by a TV camera etc. with a built in video tape recorder (VTR apparatus) on video tapes, individually managing these, then having an editor, if necessary, use a VTR apparatus in an editing room to reproduce one or more sets of the audio and/or video data (AV data) recorded on the video tapes, combine the reproduced stock videos, and record the video to be actually broadcast on another tape.
However, when managing stock video signal in a state recorded on video tapes, the work efficiency for selecting the necessary video from among a large number of stock video signals becomes bad and there also exists a need for conveying the tape on which the stock video signal is recorded from the storage place to the editing room. Further, it is hard for a number of editors to share stock video signal. Such a disadvantage is particularly conspicuous where a large number of stock video signals are used for the production of one news video.
Further, a news video signal produced on a VTR tape is generally manually carried to and loaded in a VTR apparatus for transmitting the program or a cart machine wit a built-in VTR apparatus for transmitting the program. However, it is also necessary to perform operations such as management of the news video at the stage of transmitting the program or a change of the order transmission by hand, so the efficiency is poor and mistakes due to human error may occur, so there is insufficient reliability.
In order to overcome such a disadvantage, use is made of a so-called server system used in a computing system enabling centralized management and use of the stock video or the video for broadcasts and common use of stock video.
However, a conventional server system of the same configuration as a computer is not always suitable for recording and reproducing high quality audio and/or video data in a television broadcasting station. The reason for this will be explained below. The data transfer capability of the bus is insufficient and the system size or expandability of the system is limited, copying (dubbing) of the audio and/or video data takes a relatively long time, synchronous connection with existing broadcasting equipment is difficult, the absolute amount of the system delay time is large and not constant, there is a possibility that audio and/or video data compressed and coded with a high compression rate will end up deteriorating to an extent where it cannot be used for television broadcasting, and other numerous disadvantages will arise.
The present invention was made in consideration with the above disadvantages of the prior art and has as its object to provide a video data recording and reproducing system and an audio and/or video data recording and reproducing apparatus and its system which enable dubbing of audio and/or video data from a VTR or other audio and/or video data reproducing apparatus to a recording and reproducing apparatus in a server system in a relatively short time.
Another object of the present invention is to provide a video data recording and reproducing system and an audio and/or video data recording and reproducing apparatus and its system which enable audio and/or video data to be reproduced at a high speed so as to enable dubbing of audio and/or video data in a recording and reproducing apparatus in a server system in a relatively short time.
Still another object of the present invention is to provide a video data recording and reproducing system and an audio and/or video data recording and reproducing apparatus and its system which, in a broadcast system of a television broadcasting station, enable the size and function of the server system for the audio and/or video data to be changed corresponding to the size of operations of each television broadcasting station or the type of operations to which the broadcast system is applied in the same television broadcasting station, which can be easily changed in function and structure, and which are low in cost.
Yet another object of the present invention is to provide a video data recording and reproducing system and an audio and/or video data recording and reproducing apparatus and its system which can handle audio and/or video data in slave synchronization with a reference synchronization signal etc. input from an external unit by taking into account the fact that the sending and transmission of the audio and/or video data is usually performed in strict synchronization with the reference synchronization signal or the time code in a broadcast system in a television broadcasting station and taking into account the ease of connection to the already existing broadcasting equipment.
Further, still another object of the present invention is to provide a video data recording and reproducing system and an audio and/or video data recording and reproducing apparatus and its system which can eliminate as many of the parts causing the system delay time in the audio and/or video data handled and thereby reduce the system delay time and, when operating under the control of an external control device, which can quickly adapt to control from the external control device by having the control commands from the external control device directly supplied to the portion performing the processing.
Further, another object of the present invention is to provide a video data recording and reproducing system and an audio and/or video data recording and reproducing apparatus and its system wherein the audio and/or video data are transferred and exchanged in synchronization with the reference synchronization signal as much as possible in the broadcast system and the portions requiring the synchronous/asynchronous conversion processing can be reduced.
Further, still another object of the present invention is to provide an audio a video data recording and reproducing system and an audio and/or video data recording and reproducing apparatus and its system enabling the transfer and exchange of base band digital audio and/or video data.
Still another object of the present invention is to provide a non-tracking type magnetic tape data reproducing apparatus (VTR apparatus) with which multiple speed reproduction is possible while using mechanical parts having a precision equivalent to that of a VTR apparatus performing normal speed reproduction.
Also, another object of the present invention is to provide a non-tracking type magnetic tape data reproducing apparatus with which multiple speed reproduction is possible without use of special high speed operating parts in an equalizing processing circuit or an error correction processing circuit etc.
Further, still another object of the present invention is to provide a magnetic tape data reproducing apparatus wherein the performances of other special reproduction processing facilities, for example, the jog shuttle reproduction facility, are enhanced by actively using the components used for realizing the multiple speed reproduction.
DISCLOSURE OF THE INVENTION
To attain the above object, the video recording and reproducing system according to the present invention is a video data recording and reproducing system provided with a recording and reproducing apparatus having a recording and reproducing means for recording and reproducing video data and an input/output controlling means for supplying to the recording and reproducing means the video data supplied from the outside and a reproducing apparatus having a reproducing means for reproducing the video data from a reco
Fujita Hiroyuki
Inamura Hiroshi
Ito Nirokazu
Iwamoto Tetsuya
Kojima Yuichi
Frommer William S.
Frommer & Lawrence & Haug LLP
Nguyen Huy
Sony Corporation
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