Patent Number: 8,879,721

Title: Audio communication system

Abstract: An audio communication system includes a first analog/digital convertor, a second analog/digital convertor, and an echo canceller. The first analog/digital convertor converts an audio signal, which is input from a microphone, to a data signal. The second analog/digital convertor that converts an audio signal, which is input from an auxiliary input terminal, to a data signal. When an audio signal transmitted from the outside is received and output from a speaker, the echo canceller prevents an output of the speaker from being input through the microphone and echoed back to a recipient or remote device. An operating frequency of the echo canceller is relatively lower than a sampling frequency of the second analog/digital convertor.

Inventors: Matsui; Takeshi (Kanagawa, JP)

Assignee: Sony Corporation

International Classification: H04M 9/08 (20060101)

Expiration Date: 2019-11-04 0:00:00