Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1982-08-19
1985-03-26
Psitos, Aristotelis M.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358142, H04N 591
Patent
active
045076871
ABSTRACT:
A horizontal sync pulse control circuit for a video tape recorder of the type utilizing pulse code modulation in a standard format, where there is a fixed time interval between each horizontal sync pulse and the beginning of the data pulse train for the corresponding video line. Delay circuitry and associated signal process circuitry is used to monitor this time interval. When the monitored time interval between the horizontal sync pulse and the first data pulse for the corresponding line differs from the correct time interval by one bit or less, the position of the horizontal sync pulse is re-synchronized utilizing a clock locked to the video signal. When the interval between the horizontal sync pulse and the first data pulse of the corresponding line exceeds one bit, the horizontal sync pulse is blanked, so that noise which would otherwise be produced by an incorrect horizontal sync pulse is eliminated.
REFERENCES:
patent: 3449717 (1969-06-01), Smith et al.
patent: 3978284 (1976-08-01), Yoshino et al.
patent: 4409627 (1983-10-01), Eto et al.
patent: 4417283 (1983-11-01), Hoshimi et al.
Eguchi Takashi
Hirota Yutaka
Matsushita Electric - Industrial Co., Ltd.
Psitos Aristotelis M.
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