Echo canceler far end energy discriminator

Details Echo canceler far end energy discriminator Echo canceler far end energy discriminator

H - Electricity

04

L

33/51, 379/64, 3

H04L 1/00 (2006.01) H04B 3/23 (2006.01)

Patent

CA 1168330

- 13 - ECHO CANCELER FAR END ENERGY DISCRIMINATOR Abstract Energy in a received signal is distinguished as being whole band energy or partial band energy by comparing an average value of the received signal to a modified magnitude value of the received signal. When the modified magnitude value exceeds the average value, the received signal includes whole band energy, otherwise the received signal includes only partial band energy. This technique is employed in an echo canceler to enable updating an echo path estimate during intervals that the received signal includes whole band energy and to inhibit updating of the echo estimate being generated when the received signal includes only partial band energy.

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