Pcm encoder-decoder apparatus

Details Pcm encoder-decoder apparatus Pcm encoder-decoder apparatus

H - Electricity

03

M

363/15, 354/68

H03M 1/00 (2006.01)

Patent

CA 1052470

ABSTRACT OF THE DISCLOSURE PCM encoder-decoder having a digital code generator which counts through a digital count during comparison period. An analog voltage wave- form generator sweeps In a non-linear manner from a maximum negative to a max- imum positive voltage during the same period. The digital code generator and analog voltage waveform generator are synchronized so that during each instant of each comparison period they have corresponding values. At the start of each comparison period a sample of an audio voice signal to be encoded Is trapped in a capacitor. During comparison period the sample is compared with the output of the waveform generator. Then equality is detected the count of the digital count generator at that instant is stored as a PCM digital signal for transmission with other PCM signals in accordance with known TDM techniques.

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