Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1979-12-19
1981-05-19
Bookbinder, Marc E.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 18, H04N 944
Patent
active
042688531
ABSTRACT:
A synchronizing signal generator for a PAL television signal processing system includes a frequency divider which divides a reference signal from a reference oscillator to produce a color sub-carrier signal. A pulse subtracting circuit subtracts a predetermined number of pulses per line to remove an offset in the reference oscillator frequency relative to a frequency required for producing synchronizing signals. The resulting offset-removed signal is frequency divided to provide television horizontal and vertical synchronizing frequency signals. The synchronizing frequency signals are used to produce a color framing signal which can be used by external circuits to identify a particular one of each of the sequential sets of eight fields which make up a PAL television signal. The color framing signal also resets or presets the frequency divider for establishing a predetermined phase relationship between the color sub-carrier signal and the color framing signal.
REFERENCES:
patent: 4024572 (1977-05-01), Derenbecher
patent: 4162508 (1979-07-01), Tatami
Nakamura Takashi
Taki Akira
Bookbinder Marc E.
Eslinger Lewis H.
Masinick Michael A.
Sinderbrand Alvin
Sony Corporation
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