Patent ID: 8396196
Filing Date: 2013-03-12
Classification: H04R

Abstract:
1. An audio communications host device, comprising: a communications network interface; digitizing circuitry having a plurality of inputs and a plurality of outputs; a headphone jack having a first pin that is to make electrical contact with a corresponding first pin of a headphone plug; a demultiplexer having an input coupled to receive a signal from the first pin of the headphone jack, and a plurality of outputs coupled to the plurality of inputs of the digitizing circuitry, respectively, wherein the demultiplexer is to switch the input, from being connected with one of said outputs to another one of said outputs, in accordance with a reference frequency; and an uplink audio processor to receive digitized microphone signals from the plurality of outputs of the digitizing circuitry, and in response produce and deliver an uplink signal to the communications network interface, wherein the uplink signal contains audio from one or more of the digitized microphone signals.