Spectrally interdependent gain adjustment techniques

Details Spectrally interdependent gain adjustment techniques Spectrally interdependent gain adjustment techniques

Filed on

2005-01-04

Date issued

2005-01-04

Examiner

Abebe, Daniel (Department: 2655)

Patent Class

Data processing: speech signal processing, linguistics, language

SubClass

Speech signal processing

SubSubClass

For storage or transmission

Other Related Categories

C704S225000

Type

Reexamination Certificate

Status

active

Patent number

06839666

Description

ABSTRACT:
The spectral shape of a communication signal is preserved by filtering it into a selected number of frequency band signals representing a selected number of the frequency bands. A calculator generates a plurality of initial gain signals having initial gain values for altering the gain of the frequency band signals. Each initial gain signal corresponds to one of the frequency band signals. Each initial gain value is derived from a measurement of the power of at least a portion of one of the frequency band signals. The calculator also generates a plurality of modified gain signals having modified gain values. Each modified gain signal corresponds to at least one of the frequency band signals and each modified gain value is derived from one or more functions of at least two of the initial gain values. The frequency band signals are altered in response to the modified gain signals to generate weighted frequency band signals which are combined to generate an improved communication signal.

REFERENCES:
patent: 4351983 (1982-09-01), Crouse et al.
patent: 4630305 (1986-12-01), Borth et al.
patent: 5544250 (1996-08-01), Urbanski
patent: 5666429 (1997-09-01), Urbanski
patent: 6097824 (2000-08-01), Lindemann et al.
IEEE Transactions on Acoustics, Speech and Signal Processing, vol. 28, No. 2, Apr. 1980, pp. 137-145, “Speech Enhancement Using a Soft-Decision Noise Suppression Filter,” Robert J. McAulay and Marilyn L. Malpass.
IEEE Conference on Acoustics, Speech and Signal Processing, Apr. 1979, pp. 208-211, “Enhancement of Speech Corrupted by Acoustic Noise,” M. Berouti, R. Schwartz and J. Makhoul.
Advanced Signal Processing and Digital Noise Reduction, 1996, Chapter 9, pp. 242-260, Saeed V. Vaseghi (ISBN Wiley 0471958751).
Proceedings of the IEEE, vol. 67, No. 12, Dec. 1979, pp. 1586-1604, “Enhancement and Bandwidth Compression of Noisy Speech,” Jake S. Lim and Alan V. Oppenheim.

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