Television – Synchronization – Sync generation
Patent
1993-01-21
1994-05-24
Groody, James J.
Television
Synchronization
Sync generation
348522, 348536, H04N 506, H04N 512
Patent
active
053153871
ABSTRACT:
A horizontal synchronization circuit uses a standard decoder to generate a stable first signal locked in frequency and phase to horizontal synchronizing pulses in a composite video signal. A waveshaping circuit reshapes the first signal to generate a second signal for input to a synchronizing circuit. The synchronizing circuit generates a higher-frequency third signal. A timing generator divides the frequency of the third signal to generate a fourth signal having the same frequency as the first and second signals, and a fifth signal having a higher frequency. The fourth signal is fed back to the synchronizing circuit, and can also be used for synchronization of video signal processing. The fifth signal can be used for horizontal scanning at a rate higher than the standard horizontal frequency.
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"Video Overlay Synchronizer/Sync Generator", IBM Technical Disclosure Bulletin, vol. 29, No. 1, Jun. 1986, pp. 332-333.
Groody James J.
Lee Michael H.
Mitsubishi Denki & Kabushiki Kaisha
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