Video camera apparatus including programmable timing generation

Details Video camera apparatus including programmable timing generation Video camera apparatus including programmable timing generation

1993-10-06

1996-01-09

Groody, James J.

Television

Synchronization

Locking of video or audio to reference timebase

348522, 348524, 348517, H04N 506, H04N 9475

Patent

active

054832900

ABSTRACT:
A video camera in which an output signal from a solid-state image sensor is converted into the corresponding digital signal at the 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 for latching the color signals; control circuit for detecting the phase of the changing point of the color signal generated; phase correction circuit for receiving the color signal after data clock conversion from said data clock converter, and producing a phase-corrected color difference signal by selecting, in accordance with said phase detecting signal from the control circuit, either one of the color difference signal having an intermediate phase obtained by interpolating the signals before and after the changing point of the received color signal and said color difference signal after data clock conversion; and modulation circuit for quadrature-balanced-modulating the color difference signal supplied from said phase correction circuit to provide a modulated color signal.

REFERENCES:
patent: 4038683 (1977-07-01), Thorpe et al.
patent: 4222074 (1980-09-01), Breithaupt
patent: 5045942 (1991-09-01), Tsugane et al.
patent: 5287171 (1994-02-01), Ohtsubo et al.

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