Method and apparatus for filtering an electronic environment wit

Details Method and apparatus for filtering an electronic environment wit Method and apparatus for filtering an electronic environment wit

1993-07-07

1996-03-26

Chin, Stephen

Pulse or digital communications

Receivers

Interference or noise reduction

375232, 36472419, H04B 110

Patent

active

055027474

ABSTRACT:
An improved method and apparatus for filtering an electronic environment with relatively high accuracy and efficiency and relatively short flow-through delay ("latency") is disclosed. Embodiments of the invention may be applied to digital filters implemented in software, hardware or a combination of both for applications such as audio filtering or electronic modelling of acoustic system characteristics. The method disclosed is broadly applicable in the field of signal processing and may be used to advantage, for example, in adaptive filtering; audio reverberation processing; adaptive echo cancellation; spatial processing; virtual reality audio; correlation, radar; radar pulse compression; deconvolution; seismic analysis; telecommunications; pattern recognition; robotics; 3D acoustic modelling; audio post production (including auralization and auto reverberant matching); audio equalization; compression; sonar; ultrasonics; secure communication systems; digital audio broadcast, acoustic analysis, surveillance; noise cancellation; and echo cancellation.

REFERENCES:
patent: 4623980 (1986-11-01), Vary
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patent: 4951269 (1990-08-01), Amano et al.
patent: 4992967 (1991-02-01), Auvray
patent: 5005185 (1991-04-01), Mizoquchi et al.
patent: 5159565 (1992-10-01), Bune/ 364724.2
Agarwal, R. C. and Cooley, J. W., "Vectorized Mixed Radix Discrete Fourier Transform Algorithms", Proceedings of the IEEE, vol. 75, No. 9, (Sep. 1987) pp. 1283-1292.

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