Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
2000-07-12
2002-01-22
Nguyen, Huy (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000
Reexamination Certificate
active
06341194
ABSTRACT:
TECHNICAL FIELD
This invention relates to a video signal transmission apparatus adapted for allowing digital video signals to undergo transmission through a data recorder, etc. to thereby have ability of transmitting/receiving video material (data) of the synchronous transfer system through a transmission path by ATM (Asynchronous Transfer Mode) such as B-ISDN (Broad band aspect of Integrated Services Digital Network), etc.
BACKGROUND ART
Hitherto, in transmission of news material (data) of the broadcasting station, etc., because emergency is required, from a viewpoint such that adherence to high picture quality (mainly in the case of analog transmission; picture compression is used by the requirements based on the transmission band in the case of the digital transmission) is not particularly made, video materials photographed or image-picked up at the photographing field (site) are transmitted directly or after undergone editing, through channels of SNG (Satellite News Gathering). By employing such a transmission system, times required for delivery (transfer) of video materials of this kind are shortened, so improvement in the working efficiency has been made.
On the contrary, digital video materials such as (video) materials collected (gathered) in the drama, etc., which require high picture quality, require high transfer rate. In the case of production house, etc. which cannot ensure channels of SNG, as shown in
FIG. 8
, these digital video materials are recorded onto a magnetic tape to carry convey this magnetic tape to thereby carry out delivery (transfer) of video material.
Meanwhile, also in such production house, etc., if delivery of video materials can be made by using communication line, the time required for delivery is shortened accordingly. Thus, the working efficiency can be improved.
As one method thereof, a method in which B-ISDN which is one of public lines which can be easily utilized even in the production house of this kind is used to carry out transmission of video materials of this kind is conceivable.
However, the transmission system of the video material applied to (transmission equipment within) the production house, etc. is the synchronous transfer system in which video signals are caused to undergo transmission (transmitted) without break on real time basis, whereas in the case of the transmission system by B-ISDN, data are caused to undergo transmission (transmitted) by the asynchronous transfer mode for intermittently transmitting data with respective cells being as unit. There is great difference therebetween in respect of the above-mentioned point. Accordingly, in the case of the transmission system by B-ISDN, there was the problem that it is impossible to easily carry out transmission of video materials of this kind.
Further problem is that the fact that the transfer rate of video materials of this kind is greatly different from the transfer rate of B-ISDN also makes it difficult or impossible to easily carry out transmission of video materials of this kind.
This invention has been made in view of the above-mentioned problems, and its object is to provide a video signal transmission apparatus capable of transmitting/receiving video materials by the synchronous transfer system by using the transmission path by the asynchronous transfer mode.
DISCLOSURE OF THE INVENTION
A video signal transmitting/receiving apparatus is directed to a video signal transmitting/receiving apparatus adapted for converting a series of video signals into picture data in predetermined block units to send out it to a transmission path in the asynchronous transfer mode to thereby transmit a first video material formed by the series of video signals to transmission object (object which is subject to transmission), and adapted for receiving picture data inputted in the predetermined block units by the asynchronous transfer mode through the transmission path to convert it into a series of video signals to receive a second video material formed by the series of video signals transmitted from transmission object, the apparatus comprising: recording/reproduction means for recording or reproducing the first or second video material with respect to (i.e., onto or from) a recording medium; memory means for storing the first video material outputted from the recording/reproduction means or the second video material inputted through the transmission path; and control means for monitoring memory (storage) speed when the first or second video material to be stored into the memory means is (actually) stored thereinto, and for monitoring remaining capacity of the memory means, whereby in the case where the remaining capacity of the memory means is less than a predetermined value when the first video material is transmitted from the memory means to the transmission path, the control means outputs, to the recording/reproduction means, a control signal in which reproduction speed of the recording/reproduction means is designated along with a control signal for controlling the recording/reproduction means to allow it to reproduce the first video material recorded on the recording medium, and in the case where the remaining capacity of the memory means is less than the predetermined value when the second video material is stored into the memory means from the transmission path, the control means outputs, to the recording/reproduction means, a control signal in which recording speed of the recording/reproducing means is designated along with a control signal for allowing the memory means to output therefrom the second video material stored therein to allow the recording/reproduction means to record it.
Moreover, a video signal transmitting apparatus according to this invention is directed to a video signal transmitting apparatus adapted for converting a series of video signals into picture data in predetermined block units to send out it to a transmission path in the asynchronous transfer mode to thereby transmit a video material formed by the series of video signals to transmission object, the apparatus comprising: recording/reproduction means for recording or reproducing the video material with respect to (i.e., onto or from) a recording medium; memory means for storing the video material outputted from the recording/reproduction means; and control means for monitoring memory (storage) speed of the video material stored in the memory means, and for monitoring remaining capacity of the memory means, whereby in the case where the remaining capacity of the memory means is less than a predetermined value when the video material is transmitted from the memory means to the transmission path, the control means outputs, to the recording/reproduction means, a control signal in which reproduction speed of the recording/reproduction means is designated along with a control signal for controlling the recording/reproduction means to allow it to reproduce the video material recorded on the recording medium.
Further, a video signal receiving apparatus according to this invention is directed to a video signal receiving apparatus adapted for receiving picture data inputted in predetermined block units by the asynchronous transfer mode through a transmission path to convert it into a series of video signals to thereby receive a video material formed by the series of video signals transmitted from transmission object, the apparatus comprising: recording/reproduction means for recording or reproducing the video material with respect to (i.e., onto or from) a recording medium; memory means for storing the video material inputted through the transmission path; and control means for monitoring memory (storage) speed of the video material stored in the memory means, and for monitoring remaining capacity of the memory means, whereby in the case where the remaining capacity of the memory means is less than a predetermined value when the video material is stored into the memory means from the transmission path, the control means outputs, to the recording/reproduction means, a control signal in which recording speed
Tanaka Shosuke
Yoshida Teruyuki
Frommer William S.
Frommer & Lawrence & Haug LLP
Nguyen Huy
Smid Dennis M.
Sony Corporation
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