Transmission system implementing different coding principles

Details Transmission system implementing different coding principles Transmission system implementing different coding principles

H - Electricity

04

B

H04B 14/02 (2006.01) H03M 7/30 (2006.01) H04B 1/66 (2006.01) H04L 5/02 (2006.01)

Patent

CA 2150926

In a transmission system for transmitting speech and music signals, an input signal is split up into two spectral portions in a coder. These spectral portions are coded each by its own sub-coder. The transmission quality may be improved considerably by coding according to the inventive idea a spectral portion by a time-domain coder and coding a further spectral portion by a transform domain coder.

Système de transmission de signaux vocaux et musicaux dans lequel un signal d'entrée est divisé dans un codeur en deux régions spectrales qui sont ensuite codées l'une et l'autre par leur propre sous-codeur. La qualité de la transmission peut être améliorée considérablement en codant, et c'est là l'objet de l'invention, l'une des régions spectrales à l'aide d'un codeur à domaine temporel, et l'autre région spectrale à l'aide d'un codeur à codage par transformée.

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