Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-06-28
1991-01-08
Shepperd, John W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 22, H04N 545
Patent
active
049840835
ABSTRACT:
An image processing system comprising a first and second video signal sources providing a main-field video signal and sub-field video signal, respectively, means for compressing the sub-field video signal on the time axis, and a signal merging unit which merges the compressed sub-field video signal into the main-field video signal and delivers the resulting signal to a television receiver set, wherein the signal compressing means comprising a dual-port memory having a first and second ports and operating to compress the sub-field video signal on the time axis and store the compressed signal, and control means for controlling the reading and writing of the memory for the sub-field video signal, the control means comprising a first control section for writing the sub-field video signal into the first port of said memory, a second control section for transferring a signal from the first port to the second port, and a third control section for reading out a signal from the second port, said memory implementing the reading operation and writing operation in asynchronous manner.
REFERENCES:
patent: 4134131 (1979-01-01), Hopkins, Jr.
patent: 4163248 (1979-07-01), Heitmann
patent: 4220965 (1980-09-01), Heitmann et al.
patent: 4231063 (1980-10-01), Ito et al.
patent: 4249213 (1981-02-01), Imaide et al.
patent: 4267560 (1981-05-01), Ishikawa et al.
patent: 4562435 (1985-12-01), McDonough et al.
patent: 4656515 (1987-04-01), Christopher
patent: 4665438 (1987-05-01), Miron et al.
Masuda, Fully Digitalized Color Picture in Picture Television System, IEEE Transactions on Consumer Electronics, vol. CE-25, Feb. 1979.
Masuda Michio
Nishijima Hideo
Ohtsubo Hiroyasu
Okamoto Kaneyuki
Ono Koichi
Hitachi , Ltd.
Shepperd John W.
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