| 摘要 |
A downlink activity and double talk probability detector and method for an echo canceler circuit ( 10 ) improves the stability of an echo canceler adaptive filter ( 300 ) and improves the attenuation of post-echo canceler uplink data ( 388 ). The echo canceler circuit ( 10 ) includes a downlink activity and double talk probability data generator ( 30 ) and an echo canceler stage ( 20 ). The downlink activity and double talk probability data generator ( 30 ) receives pre-echo canceler uplink data ( 40 ) and downlink data ( 50 ) and in response produces double talk probability data ( 60 ) and downlink activity data ( 70 ). The echo canceler stage ( 20 ) receives the downlink data ( 50 ), the pre-echo canceler uplink data ( 40 ), the double talk probability data ( 60 ) and the downlink activity data ( 70 ), and in response produces uplink data ( 80 ).
|
