The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2012
Filed:
Sep. 01, 2008
Daniel L. Chieng, Austin, TX (US);
Douglas D. Gephardt, Dripping Springs, TX (US);
Larry E. Hand, Meridian, MS (US);
Jeffrey M. Klaas, Lakeway, TX (US);
Adam Zaharias, Austin, TX (US);
Daniel L. Chieng, Austin, TX (US);
Douglas D. Gephardt, Dripping Springs, TX (US);
Larry E. Hand, Meridian, MS (US);
Jeffrey M. Klaas, Lakeway, TX (US);
Adam Zaharias, Austin, TX (US);
D2Audio Corporation, Milpitas, CA (US);
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.