Stochastic vector based network echo cancellation

摘要

An apparatus generally having a first circuit and a second circuit is disclosed. The first circuit may be configured to generate a first sample by filtering an input vector based on (a) a filter vector and (b) a stochastic vector. Each of a plurality of components in the stochastic vector generally has a respective random value. The first circuit may also be configured to generate a second sample as a difference between a third sample and the first sample. The third sample may be received from a network as an echo. The second circuit may be configured to update a subset of a plurality of taps of the filtering where a corresponding one of the components of the stochastic vector has a first value of the random values.

主权项

1. An apparatus comprising:
a first circuit configured to (i) generate a first sample by filtering an input vector through a filter based on both (a) a filter vector and (b) an intermediate vector, each of a plurality of components in said intermediate vector having a respective random value, and (ii) generate a second sample as a difference between a third sample and said first sample, said third sample being received from a network as an echo; and a second circuit configured to update a subset of a plurality of taps of said filter based on a corresponding one of said components of said intermediate vector that has a particular value, wherein a number of elements of said subset is greater than a predetermined minimum number.