Highly Oversampled Subband Adap Cancellation on a Low-reso

Highly oversampled subband adaptive filters for noise cancellation on a low-resource DSP system

A real-time subband adaptive noise cancellation system on an ultra low-power miniature DSP system is implemented. The system is targeted at personal communication devices where the speaker may be in a noisy environment. The system is implemented on an ultra low-power DSP system that incorporates a DSP core and an oversampled WOLA filterbank. Pre-emphasis filters are used to increase the converg...

A Filterbank Design for Oversampled Filter Banks without Aliasing in the Subbands

In this paper we propose a new strategy for the design of real-valued lterbanks which avoids aliasing in the subbands (\inband aliasing") such that applications where two subband signals have to be compared become possible. One example for such an application is subband adap-tive ltering, where, with the proposed lter-bank structure, the traditionally required cross-term adaptive lters between ...

SYSC5603/ELG6163 Project Report: Implementation of an Oversampled Subband Acoustic Echo Canceler

Convergence improvement for oversampled subband adaptive noise and echo cancellation

The convergence rate of the Least Mean Square (LMS) algorithm is dependent on the eigenvalue distribution of the reference input correlation matrix. When adaptive filters are employed in low-delay over-sampled subband structures, colored subband signals considerably decelerate the convergence speed. Here, we propose and implement two promising techniques for improving the convergence rate based...

NORSIG2000 Sample Paper

This paper propose the non-uniform subband scheme with combine acoustic echo canceller and noise reduction system. Bands of the presented multirate systems are spread according to the cochlear model by the all-pass transformation of polyphase filter bank. Oversampled approach was assumed for solution because of downsampling used, which reduce complexity with relation to full-band schemes, also ...