Nonuniform oversampled filter banks for audio signal processing

Details Nonuniform oversampled filter banks for audio signal processing Nonuniform oversampled filter banks for audio signal processing

2006-02-07

2006-02-07

Chin, Stephen (Department: 2634)

Pulse or digital communications

Receivers

Interference or noise reduction

C370S384000, C704S220000, C708S300000

Reexamination Certificate

active

06996198

ABSTRACT:
A non-uniform filter bank is created by joining sections of oversampled uniform filter bands that are based on complex exponential modulation (as opposed to cosine modulation). Each filter bank handles a given, non-overlapping frequency band. The bands are not of uniform bandwidth, and the filters of different banks have different bandwidths. The frequency bands of the different filter banks cover the frequency of interest with gaps in the neighborhoods of the filter band edges. A set of transition filters fills those gaps.

REFERENCES:
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patent: 5436940 (1995-07-01), Nguyen
patent: 5732189 (1998-03-01), Johnston et al.
J. Princen in “The Design of Nonuniform Filter Banks,” IEEE Transactions on Signal Processing, vol. 43 No. 11, pp. 2550-2560 Nov. 1995.
Zoran Cvetkovitc, On Discrete Shotr-Time Fourier Analysis, pp. 2628-2640, vol. 48, No. 9, Sep. 2000, IEEE Transactions on Signal Processing.

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