Voice signal communication with burst error reduction

Details Voice signal communication with burst error reduction Voice signal communication with burst error reduction

H - Electricity

03

M

H03M 1/00 (2006.01) H03M 13/00 (2006.01) H03M 13/09 (2006.01) H03M 13/23 (2006.01) H04L 1/00 (2006.01)

Patent

CA 2087585

ABSTRACT OF THE DISCLOSURE In order to reduce adverse effects introduced by burst errors to a reproduction signal representative of a voice signal, a voice signal encoding device (11) comprises a cyclic encoder (35), between a digitizer (17) for digitizing an input voice signal and a convolution encoder (19) for encoding an encoder input signal into an encoded signal, to preliminarily encode the digital signal into the encoder input signal. A voice signal decoding device (13) comprises a detector (37), between a maximum likelihood decoder (17), such as a Viterbi decoder, and a voice signal decoder (19) for decoding a decoder input signal into the reproduced signal, to detect the burst errors remaining in a maximum likelihood code sequence. An interpolator (39) interpolates correct codes in the maximum likelihood code sequence to produce the decoder input signal in accordance with the burst errors detected by the detector.

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