CMOS Implementation of an Adaptive Noise Canceller into a Subband Filter

TitleCMOS Implementation of an Adaptive Noise Canceller into a Subband Filter
Publication TypeConference Paper
Year of Publication2005
AuthorsJohn, M, Schwarzbacher, ATh., Timoney, J
Conference Name8th International Conference on Digital Audio Effects (DAFx'05)
Pagination61-64
Conference Start Date20/09/2005
Conference LocationMadrid, Spain
Abstract

In recent years the demand for mobile communication has increased
rapidly. While in the early years of mobile phones battery life was
one of the main concerns for developers speech quality is now becoming
one of the most important factors in the development of
the next generation of mobile phones.
This paper describes the CMOS implementation of an adaptive
noise canceller (ANC) into a subband filter. The ANC-Subband filter
is able to reduce noise components of real speech without prior
knowledge of the noise properties. It is predestined to be used
in mobile devices and therefore, uses a very low clock frequency
resulting in a small power consumption. This low power consumption
combined with its small physical size enables the circuit also
be used in hearing aids to efficiently reduce noise contained in the
speech signal.

URLhttp://dafx05.ssr.upm.es/Proc_DAFx05/P_061.pdf
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