Voice encoding and voice decoding apparatus

Details Voice encoding and voice decoding apparatus Voice encoding and voice decoding apparatus

1995-08-04

1998-02-10

Chin, Stephen

Pulse or digital communications

Receivers

Interference or noise reduction

395 217, G10L 302, H04L 2706

Patent

active

057177244

ABSTRACT:
To improve the voice quality of a digital mobile communication system such as a car telephone or portable telephone when outdoor background noises are superimposed on voices. To achieve the above object, a voice decoding apparatus comprises noise superimposed part detecting means for discriminating between a noise part containing only noises and a voice part containing voices from signal encoded at a transmission side, voice decoding means for decoding an encoded signal in the voice part into a waveform signal, noise decoding means for decoding an encoded signal in the noise part into a waveform signal, and noise control means for controlling the frequency characteristic of said noise part by controlling said noise decoding means when said noise superimposed part detecting means judges the noise part.

REFERENCES:
patent: 5327461 (1994-07-01), Kushige
patent: 5448679 (1995-09-01), McKiel, Jr.

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