Speech coding and decoding system with background sound reproduc

Details Speech coding and decoding system with background sound reproduc Speech coding and decoding system with background sound reproduc

1990-04-20

1992-08-25

Shaw, Dale M.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 51, G10L 500

Patent

active

051425823

ABSTRACT:
In speech decoding, a transmission code, which includes an error correcting code added to a speech code, is received and whether or not there is a code error is detected on the basis of the error correcting code. At this time, when there is no code error or when the detected code error has been corrected, a normal speech decoding processing is executed. On the other hand, when there is a code error which is impossible to be corrected, artificially background sound corresponding to the decoded speech is generated from characteristic parameters indicating unvoiced sound in the decoded speech. The parameters are continuously extracted from the decoded speech, stored in a memory and are used to replace an erroneous portion of the speech code.

REFERENCES:
patent: 4301329 (1981-11-01), Taguchi
patent: 4654853 (1987-03-01), Moriyama et al.
patent: 4754483 (1988-06-01), Weaver
patent: 4918729 (1990-04-01), Kudoh
patent: 4972484 (1990-11-01), Theile et al.
patent: 4979174 (1990-12-01), Cheng et al.

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