For externally clocked digital audio input, determining a valid clock and muting audio during synchronization
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United States of America Patent
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May 4, 2010
Grant Date -
Jun 19, 2008
app pub date -
Oct 19, 2006
filing date -
Oct 19, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Methods and apparatus for determining the existence of an external clock over a digital input port on a computer. In one embodiment, the external clock is validated, and a lock is performed when the clock is valid. Whenever a loss of the lock is detected, and, if a re-lock is likely, the apparatus is muted so that audio artifacts that would otherwise be heard are minimized. The methods and apparatus also provide automatic re-locking to the external clock when a sampling rate change is detected.
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