Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
381 38, G10L 500
A low-overhead method of protecting multi-pulse speech coders from the effects of severe random or fading pattern bit errors combines a standard error correcting code (convolutional rate 1/2 coding and Viterbi trellis decoding) for protection in random errors with cyclic redundancy code (CRC) error detection for fading errors. Compensation for detected fading errors takes place within the speech coder. Protection is applied only to the perceptually significant bits in the transmitted frame.
patent: 4688224 (1987-08-01), Degan
patent: 4710960 (1987-12-01), Sato
patent: 4747104 (1988-05-01), Piret
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Koch Steven R.
Toy Raymond L.
Zinser Richard L.
Davis Jr. James C.
General Electric Company
Kemeny Emanuel S.
Zale Lawrence P.
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