US 7,321,627 B2
Method and system for providing zero detect and auto-mute
Kevin L Miller, Lawrenceville, Ga. (US); and Keith L Klingler, San Diego, Calif. (US)
Assigned to Broadcom Corporation, Irvine, Calif. (US)
Filed on Jan. 28, 2004, as Appl. No. 10/765,479.
Claims priority of provisional application 60/505022, filed on Sep. 24, 2003.
Prior Publication US 2005/0063476 A1, Mar. 24, 2005
Int. Cl. H04B 14/04 (2006.01)
U.S. Cl. 375—242  [341/110; 341/114] 12 Claims
OG exemplary drawing
 
1. A method for muting zero level pulse code modulated (PCM) samples received as inputs to a digital to analog converter (DAC) including a PCM input module and a mapping module, the method comprising:
monitoring a level of the PCM samples received as inputs to the PCM input module;
sensing consecutive zero level PCM samples from among the monitored input PCM samples; and
muting a PCM input to the mapper when only a single parameter has been sensed, the single parameter being a predetermined number of consecutive zero level PCM samples.