Switched filterbank for use in audio signal coding

Details Switched filterbank for use in audio signal coding Switched filterbank for use in audio signal coding

1996-10-01

1998-12-22

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Audio signal bandwidth compression or expansion

704230, G10L 900, H04H 500

Patent

active

058528067

ABSTRACT:
An audio coding technique which utilizes a signal adaptive switched filterbank having a first filterbank and a wavelet filterbank. The filterbank switches between the first filterbank and the wavelet filterbank to filter an input signal as a function of the stationarity of the input signal. The first filterbank is utilized to filter stationary signal components. The wavelet filterbank is utilized to filter non-stationary signal components (e.g., attacks).

REFERENCES:
patent: 5381143 (1995-01-01), Shimoyoshi et al.
patent: 5481614 (1996-01-01), Johnston

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