Patent US3735377A successfully refreshed from Google Patents.
Patent US3898378A successfully refreshed from Google Patents.
US3898378A
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US
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Video signal transmission system
Assignee: Fujitsu Ltd
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Filing: 1973-07-26
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Granted: 1975-08-05
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Expires: 1993-07-26
Abstract
Abstract A video signal transmission system for reduced bandwidth transmission defines each picture frame to include at least two picture element series Aij, Bij, . . . A regularly selective transmitter selects the video picture element signals of a given series, in succession for all such series, in corresponding, successive picture frame periods, the selected signals being predictively coded for transmission. In the receiver, a frame memory stores the predictively coded signals for all picture element series of an entire picture frame, the content of the memory being renewed, or updated, in each successive frame period with the picture element signals of the received, corresponding series. The frame memory is read out completely during each frame period, and the predictively coded signals are decoded and combined to produce the output video signal for a complete picture frame.
Inventors
- 👤 Shigehiko Hinoshita
- 👤 Yukihiko Minejima
- 👤 Takao Moriya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:49
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/50; H04N19/587; H04N19/59
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
313 words
A video signal transmitting and receiving system for transmitting a video signal with compressed bandwidth, wherein each picture frame comprises plural series of picture elements, each said series comprising plural, respectively corresponding ones of said picture elements, said system comprising; a transmitting station including: a regularly selective transmitter selecting for transmission in a given frame time period, from the video signal corresponding to a picture fRame, the picture element signals corresponding to a given said series of picture elements, and selecting in successive frame periods, the picture element signals corresponding to successive ones of said plural series of picture elements, and predictive coding means receiving the picture element signals of each said series thereof as selected by said regularly selective transmitter for transmission and predictively coding the said picture element signals of each said series; and a receiving station including: a frame memory for storing the predictively coded picture element signals of a complete picture frame, a data replacing circuit for replacing the predictively coded picture element signals of each series thereof as stored in said frame memory with the predictively coded picture element signals of the corresponding series thereof, as received in a given frame period, means for reading out said frame memory, including a distributor circuit for distributing the predictively coded picture element signals read out from said frame memory in a given frame period into respectively corresponding, plural series of predictively coded signals, a plurality of decoding means receiving and decoding respectively corresponding ones of said plural series of predictively coded signals distributed by said distributor circuit and producing respectively corresponding plural series of decoded picture element output signals, and a data combining circuit receiving and combining the decoded picture element signals of said plural series thereof produced by said plurality of predictive decoding means, to produce an output video signal for all picture elements in each frame time period.
Claim 2
Dependent Claim
313 words
A video signal transmitting and receiving system for transmitting a video signal with compressed bandwidth, wherein each picture frame comprises plural series of picture elements, each said series comprising plural, respectively corresponding ones of said picture elements, said system comprising; a transmitting station including: a regularly selective transmitter selecting for transmission in a given frame time period, from the video signal corresponding to a picture fRame, the picture element signals corresponding to a given said series of picture elements, and selecting in successive frame periods, the picture element signals corresponding to successive ones of said plural series of picture elements, and predictive coding means receiving the picture element signals of each said series thereof as selected by said regularly selective transmitter for transmission and predictively coding the said picture element signals of each said series; and a receiving station including: a frame memory for storing the predictively coded picture element signals of a complete picture frame, a data replacing circuit for replacing the predictively coded picture element signals of each series thereof as stored in said frame memory with the predictively coded picture element signals of the corresponding series thereof, as received in a given frame period, means for reading out said frame memory, including a distributor circuit for distributing the predictively coded picture element signals read out from said frame memory in a given frame period into respectively corresponding, plural series of predictively coded signals, a plurality of decoding means receiving and decoding respectively corresponding ones of said plural series of predictively coded signals distributed by said distributor circuit and producing respectively corresponding plural series of decoded picture element output signals, and a data combining circuit receiving and combining the decoded picture element signals of said plural series thereof produced by said plurality of predictive decoding means, to produce an output video signal for all picture elements in each frame time period.
Claim 3
Dependent Claim
22 words
A video signal transmitting and receiving system as recited in claim 1 wherein said predictive coding means is of the DPCM type.
Claim 4
Dependent Claim
40 words
A video signal transmitting and receiving system as recited in claim 1 wherein said picture frame comprises two series of picture elements and wherein said regularly selective transmitter selects the said two series of picture element signals in alternate succession.
Claim 5
Dependent Claim
105 words
A video signal transmitting and receiving system as recited in claim 3, wherein: said distributor circuit comprises plural flip-flop circuits respectively corresponding to said plural series outputs of said distributor circuit and receiving in common the picture element signals for all of said series as read from said frame memory, and said receiving station further includes means for supplying a clock signal selectively and in succession to said plural flip-flop circuits at the rate of the picture element signals as read from said frame memory, the outputs of respective ones of said plural flip-flops comprising the picture element signals of the respectively corresponding series thereof.
Claim 6
Dependent Claim
79 words
A video signal transmitting and receiving system as recited in claim 1 wherein said picture frame comprises first and second series of picture elements, and wherein: said distributor circuit distributes the picture element signal outputs from said frame memory into respective first and second series of coded picture element signals, and said plurality of predictive decoding means comprises first and second decoding means for decoding the respective first and second series of predictively coded signals from said distributor circuit.
Claim 7
Dependent Claim
112 words
A video signal transmitting and receiving system as recited in claim 5 wherein each said predictively coded picture element signal comprises an n bit parallel signal and wherein: said distributor circuit comprises first and second sets of n flip-flop circuits each, said sets respectively corresponding to said first and second series of coded picture element signals, and receiving in common the said first and second series of coded picture element signals read out from said frame memory, and wherein said receiving station further comprises means for supplying a clock signal at the rate of the picture eLement predictively coded signals alternately to the n flip-flop circuits of said first and second sets.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |