Patent ID: 6052462
Filing Date: 2000-04-18
Classification: H04M

Abstract:
An apparatus for detecting Near-End audio activity in a two-way telecommunication system connected between a Near-End and a Far-End, the apparatus comprising:a first input terminal for receiving a first telecommunication signal from the Far-End;a removal filter connected with the first input terminal for removing a selected signal component from the first telecommunication signal and thereby preventing audio reproduction of the selected signal component at the Near-End;a second input terminal for receiving a second telecommunication signal from the Near-End;a detection filter connected with the second input terminal and configured for detecting the presence of a component of the second telecommunication signal that corresponds with the component removed from the first telecommunication signal; anda decision stage connected with the detection filter and responsive thereto for generating a control signal indicating the presence of audio signals generated at the Near-End when the signal component is detected.