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Algorithm of a Single Chip Acoustic Echo Canceller Using Cascaded Cross Spectral Estimation
Citation key 0802Liem2003
Author Marco Liem and Hyoung-Gook Kim and Otto Manck
Title of Book IWAENC 2003
Year 2003
Address Kyoto, Japan
Month sep
Abstract This paper details the algorithm used by a low cost, single chip acoustic echo canceller. The algorithm is based on classical cross spectral estimation. It is employed in a cascaded filter structure where a short, fast filter operates on the output of a longer but slower filter to optimize the tracking performance of changes in the echo path without affecting the steady state performance. This combination allows the use of a fixed configuration for a wide range of acoustic environments. This contrasts to the predominately employed LMS type of algorithms which are much more sensitive to noise and often require an extensive parameterization specific to the operating environment.
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