Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1990-03-07
1993-01-19
Kostak, Victor R.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358148, H04N 504
Patent
active
051811162
ABSTRACT:
In a television receiver in which scanning for an incoming video signal is performed at a frequency n times as high as the input horizontal synchronous frequency by suitably controlling writing and reading on its video memory, the signals for writing and reading on the video memory unit are generated by a horizontal synchronization/deflection circuit. The horizontal synchronization/deflection circuit is arranged by having a clock generation/synchronous deflection circuit for generating reference signals to control the writing and reading on the video memory unit provided with a phase comparator such that a horizontal drive signal to drive a horizontal deflection circuit and a flyback pulse are brought in phase.
REFERENCES:
patent: 4134082 (1979-01-01), Fernster
patent: 4591910 (1986-05-01), Lai et al.
patent: 4769705 (1988-09-01), Lendaro
patent: 4870490 (1989-09-01), Sekiya et al.
patent: 5043813 (1991-08-01), Christopher
Fujiwara Ken-ichi
Kaizaki Kazuhiro
Kamiya Masanori
Kubota Sadao
Kurita Toshiyuki
Hitachi , Ltd.
Hitachi Video Engineering Inc.
Kostak Victor R.
Murrell Jeffrey S.
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