Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1989-07-11
1992-03-17
Richardson, Robert L.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358310, 358342, H04N 576
Patent
active
050973460
ABSTRACT:
In a video signal reproducing apparatus having a field memory for still picture reproduction, the period Ti of reading a still picture signal from the field memory is altered to different lengths of time to repeat the reading operation for the different periods as one cycle. The sum of the reading periods Ti within one cycle is equal to the vertical synchronizing signal period Tv times an integer. Each of the reading periods Ti is set to a value equal to the period Tc of color subcarrier times an integer, approximate to the horizontal synchronizing signal period Th times an integer to the greatest possible extent and approximate to the vertical synchronizing signal period Tv to the greatest possible extent. Accordingly, there is no disturbance in the color subcarrier period at the function between fields, while the disturbance in the horizontal synchronizing signal period at the field junction can be greatly diminished.
REFERENCES:
patent: 4635134 (1987-01-01), Sasamura et al.
patent: 4858030 (1989-08-01), Oru et al.
patent: 4882633 (1989-11-01), Nakatami et al.
"A-66D VHS Loading Digital Memory", Ikusawa et al., TV Technique, Nov. 1985, pp. 35-39.
Chevalier Robert
Richardson Robert L.
Sanyo Electric Co,. Ltd.
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