Jitter processing circuit for digital camera processing

Details Jitter processing circuit for digital camera processing Jitter processing circuit for digital camera processing

1991-10-29

1994-02-15

Groody, James J.

Television

Synchronization

348642, 348222, H04N 9077

Patent

active

052871711

ABSTRACT:
A video camera in which an output signal from a solid-state image sensor is converted into a corresponding digital signal at a horizontal reading cycle of the output signal, and the digital signal is digital-processed with a first predetermined clock (fs) synchronous with the reading cycle to provide a luminance signal and a color difference signal. This video camera comprises data clock converter circuit for latching the color difference signals generated in synchronism with the first clock with a data latch clock synchronous with a second clock (4 fsc) to thereby convert the clock for the color difference signal; a control circuit for detecting the phase of the changing point of the color difference signal to provide a phase detecting signal and supply said data latch clock with which color deference signal is latched synchronously with said second clock (4 fsc) at a stable point after the changing point of the color difference signal generated in synchronism with the first clock (fs); a phase correction circuit for receiving the color difference signal from said data clock converter circuit and producing a phase-corrected color difference signal; and a modulation circuit for quadrature-balance-modulating the color difference signal supplied from said phase correction circuit to provide a modulated color signal.

REFERENCES:
patent: 4620222 (1986-10-01), Baba et al.
patent: 4654708 (1987-03-01), de la Guardia et al.
patent: 4686567 (1987-08-01), Burdick
patent: 4689664 (1987-08-01), Moring et al.
patent: 4692889 (1987-09-01), McNeely
patent: 4700219 (1987-10-01), Tanaka et al.
patent: 5008740 (1991-04-01), Phillips et al.
patent: 5138320 (1992-08-01), Ngo et al.
Proceedings of the Institute of Television Engineers of Japan, vol. No. 11 (1987), pp. 983-990.

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