Method for compensation of echo contained in reception signal for transceivers of various types, e.g. fully duplex speakerphone appliances, using adaptive filters for generating compensation signal

摘要

Dependent on transmit signal (r) is generated compensation signal (c) by adaptive filters (4). Compensation signal is combined with echo (2) containing reception signal (m,m'). With echo produced by transmit signal, combination endeavours to obtain reception signal (d) without echo. Filters are adapted in dependence on correlation between echo containing reception signal and compensation signal. Preferably adaptive filters contain at least one digital filter of specified type (FiR). Independent claims are included for echo compensating appliance and for its application.