Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
2007-05-01
2007-05-01
Boccio, Vincent F. (Department: 2621)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000, C348S497000, C348S498000
Reexamination Certificate
active
10874073
ABSTRACT:
A jitter correcting apparatus and method for a video signal in a video signal reproduction system includes a digital video decoder for demodulating an externally-applied video signal and a phase-locked loop for generating a first clock signal synchronized with the video signal. The system includes an address generator, a comparator and a dual port memory device. The address generator generates a write address for writing the video signal in response to the first clock signal, generates a read address for reading the video signal in response to a second clock signal having a fixed frequency, and corrects the write and read addresses in response to a head switching signal and first and second comparison signals. The comparator compares the write address with the read address and generates the first comparison signal and the second comparison signal according to a result of the comparison. The dual port memory device stores the video signal at a location corresponding to the write address in response to the first clock signal and outputs a video signal stored at a location corresponding to the read address in response to the second clock signal. Accordingly, the jitter of a video signal, which may occur while processing an analog video signal in a digital mode, is corrected using a memory device having a small capacity, thereby allowing a video image to be stably output.
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Boccio Vincent F.
Mills & Onello LLP
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