Systems and methods for controlling audio volume in the processor of a high definition audio codec
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United States of America Patent
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Jul 17, 2012
Grant Date -
Mar 5, 2009
app pub date -
Sep 1, 2008
filing date -
Sep 1, 2007
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Expired
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Abstract
Systems and methods for controlling the audio volume of an audio signal in an HDA codec having a programmable processor such as a DSP, wherein the codec receives digital audio signals and audio volume control verbs over an HDA bus, and the audio volume levels associated with the audio volume control verbs are used by the processor in the generation pulse width modulated (PWM) output signals, thereby controlling the audio volume levels of the output signals. The processor may be configured to adjust non-volume parameters such as PWM deadtime, in addition to adjusting audio volume, based on the audio volume levels. The codec may be implemented in a PC or other system that implements an HDA system that includes the HDA bus and HDA codec.
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