Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1981-05-21
1983-12-20
Psitos, Aristotelis M.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358326, 358 19, 360 361, 360 362, H04N 944, H04N 128, H04N 578
Patent
active
044221037
ABSTRACT:
A device for eliminating time base variations in a video disc player in which a gate pulse controlled by the latest time base information is generated for preventing faulty operation during the absence of burst signals. The gate pulse is generated after a predetermined time which is proportional to a delay control signal and which starts from a leading edge of each of the horizontal synchronizing signals. A time base information pulse is generated having a width extending from the leading edge of the gate pulse to the leading edge of the specific color burst signal appearing after the leading edge of the gate pulse when color burst signals are present and having the same width as the gate pulse when the color burst signals are absent. The delay control signal and the timing pulse are generated in turn in response to a sampling pulse and the time base information pulse when the color burst signals are present and in response only to the time base information pulse when the color burst signals are absent. The sampling pulse is produced in response to the timing pulse when the color burst signals are absent and an error signal is generated in response to a reference horizontal synchronizing pulse and the sampling pulse. A servo device operates in response to the error signal to compensate for time base variations.
REFERENCES:
patent: 3507983 (1970-04-01), Leman
patent: 4015288 (1977-03-01), Ebihara et al.
patent: 4339770 (1982-07-01), Dennison et al.
Psitos Aristotelis M.
Universal Pioneer Corporation
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