Method and apparatus to improve decoding of composite video signals
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United States of America Patent
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Mar 4, 2008
Grant Date -
Apr 13, 2006
app pub date -
Oct 13, 2004
filing date -
Oct 13, 2004
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Abstract
Video decoder systems in which both the analog-to-digital converter and the composite decoder are driven by the stable sample clock, such as a crystal source. The outputs of the composite decoder are provided to a source rate converter, having an output that is provided to a digital output formatter. The digital output formatter is driven by the output clock, which may be locked to the source clock if desired. The output clock is developed by a clock generator which may be one of several different types, including a fractional N synthesizer, a direct digital synthesizer or a puncture clock.
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