A method and apparatus are described for reducing, in communication signals received by a local network from a remote network (FAR-IN signals), that energy content that is attributable to echoes of signals transmitted into the local network (NEAR-IN signals). This is achieved, in part, by generating...http://www.google.com/patents/US5587998?utm_source=gb-gplus-sharePatent US5587998 - Method and apparatus for reducing residual far-end echo in voice communication networks
