Detecting and replacing bad speech subframes wherein the output

Details Detecting and replacing bad speech subframes wherein the output Detecting and replacing bad speech subframes wherein the output

1997-05-23

2000-11-14

Cosimano, Edward R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704226, 4552261, 714712, G10L 300, H04B 1700

Patent

active

061482811

ABSTRACT:
A receiving device comprises a demodulating section for demodulating transmission signal into a demodulated signal having a digital speech signal and a error detecting code. The demodulating section divides the digital speech signal into first through N-th subframe speech signals and detects a received field intensities of the first through the N-th subframe speech signals to produce first through N-th field detection signals representative of the received field intensities of the first through the N-th subframe speech signals, respectively, where N represents a positive integer which is greater than one. An error detecting section detects whether or not the digital speech signals has an error in accordance with the error detecting code to produce an n-th error detection signal when the digital speech signal has an error and when an n-th field detection signal has a received field intensity that is not greater than a predetermined received field intensity, where n is a variable between one and N, both inclusive. An interpolating section carries out interpolation of the digital speech signal in response to the n-th error detection signal to produce a speech signal.

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