Method and apparatus for echo removal in a communication system

摘要: A signal processor for, e.g., a telephonic communication system interconnecting near location and at least one far includes an echo canceller for suppressing the re-transmission of received signals. The operation is controlled according to whether transmitting or receiving, receiving. means detecting doubletalk, controlling in response detection such that doubletalk permitted. In method operation, delay applied inputs from ends, each these signals used determining operating state before being operate adaptive filter canceller. another carried out, part, by evaluating performance auxiliary filter. pair statistics respectively indicate near-end input contains more energy than expected generated far-end input, effectively removed. According method, declared only satisfy predetermined conditions.