Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1987-06-19
1989-09-05
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 21R, 358 31, 358 36, 358167, 358337, H04N 514
Patent
active
048644021
ABSTRACT:
A video memory, for use with a video tape recorder, a television receiver of the like to process a picture, is simplified and can achieve the functions of a time base corrector, a noise reducer and a comb filter, so as to considerably improve the quality of a video picture. A frequency converting circuit for use with the video memory includes a comparator for comparing first and second address signals and an address correction circuit connected to receive an output signal from the comparator. When a crossing occurs between the first and second address signals, the sequential order in which an address signal is supplied to the memory is switched by the address correcting circuit, to thereby derive a continuous output signal from the memory.
REFERENCES:
patent: 4240106 (1980-12-01), Michael et al.
patent: 4646151 (1987-02-01), Welles, II et al.
patent: 4677470 (1987-06-01), Cooper et al.
patent: 4746980 (1988-05-01), Petersen
Ebihara Norio
Kita Hiroyuki
Ohsawa Yoshihito
Sasaki Takayuki
Groody James J.
Parker Michael D.
Sony Corporation
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