Television – Synchronization – Sync separation
Patent
1993-05-10
1994-09-27
Powell, Mark R.
Television
Synchronization
Sync separation
348502, 348524, H04N 9465, H04N 1116
Patent
active
053510933
ABSTRACT:
Signal processing apparatus comprises a chrominance subsampler (10) for sampling the U and V components of a PAL video signal in response to an enable signal. A counter (30) responsive to the horizontal synchronization component of the PAL video signal generates the enable signal upon detection of a predetermined number of horizontal synchronization pulses. Logic (60,70,80) responsive to the vertical synchronization component of the PAL video signal resets and disables the counter (30) upon detection of a vertical synchronization pulse. Logic (50,60,70,80) restarts the counter (30) from a reset state upon detection of a predetermined polarity in the V component of the PAL video signal.
REFERENCES:
patent: 4178607 (1979-12-01), Mikado
patent: 4308550 (1981-12-01), Melwisch et al.
patent: 5119197 (1992-06-01), Kuroda
Brown David J.
Conway-Jones David C.
Kim Jong-Han
Smith Peter M.
International Business Machines - Corporation
McKinley Martin J.
Murrell Jeffrey S.
Powell Mark R.
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