Direct synthesis of a digital audio sample clock
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United States of America Patent
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Jun 18, 1996
Grant Date -
N/A
app pub date -
May 31, 1994
filing date -
May 31, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Direct synthesis of a digital audio sample clock from a digital video sample clock is achieved by using a numerically controlled oscillator driven by the digital video sample clock. A phase accumulator increments a phase increment at the frequency of the digital video sample clock, the phase increment being a function of a desired frequency for the digital audio sample clock, the frequency of the digital video sample clock and the bit precision of the accumulator. The accumulated phase output from the accumulator is converted into a sine wave signal at the desired audio frequency from which the digital audio sample clock is derived.
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