Method and system for reducing effects of noise producing...

Details Method and system for reducing effects of noise producing... Method and system for reducing effects of noise producing...

2006-03-20

2008-11-18

McFadden, Susan (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

Reexamination Certificate

active

07454335

ABSTRACT:
There is provided a method of reducing effect of noise producing artifacts in silence areas of a speech signal for use by a speech decoding system. The method comprises obtaining a plurality of incoming samples of a speech subframe; summing an absolute value of an energy level for each of the plurality of incoming samples to generate a total input level (gain_in); smoothing the total input level to generate a smoothed level (Level_in_sm); determining that the speech subframe is in a silence area based on the total input level, the smoothed level and a spectral tilt parameter; defining a gain using k1*(Level_in_sm/1024)+(1−k1), where K1 is a function of the spectral tilt parameter; and modifying an energy level of the speech subframe using the gain.

REFERENCES:
patent: 5544250 (1996-08-01), Urbanski
patent: 6453289 (2002-09-01), Ertem et al.
patent: 2004/0148166 (2004-07-01), Zheng
patent: 2005/0177364 (2005-08-01), Jelinek
Coding of Speech at 8 kbit/s Using Conjugate-Structure Algebraic-Code-Excited Linear-Prediction(CS-ACELP), International Telecommunication Union, ITU-T Recommendation G.729, 1-35 (Mar. 1996).

Affiliated with

Also associated with

Rating

Method and system for reducing effects of noise producing... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for reducing effects of noise producing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for reducing effects of noise producing... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4021303