The filter for use in an acoustic echo canceller, acoustic echo canceller, methods of processing a digital acoustic signal in an acoustic echo canceller.And an error signal is digitised acoustic, and Realization of echo cancellation.

摘要

"Bank of filter for use in an acoustic echo canceller, acoustic echo canceller, methods of processing a digital acoustic signal in an acoustic echo canceller.And an error signal is digitised acoustic, and implementation of acoustic echo cancellation.The complexity of processing in an acoustic echo canceller can be reduced through the division of the signs of terminal next and terminal away from entry into respective plurality ofSigns of sub - band of frequ00b3u00eancia.Also, due to the symmetry of the conjugated complex of conventional discrete Fourier transformed matrices.Not all the signs of a sub band of each plurality used need to be subject to the processing of echo cancellation.The signals of sub band, which would otherwise have been produced by processing of echo cancellation are, in contrast,Provided through the production of the conjugated complex signals of the sub band signals which have been subjected to processing of echo cancellation.