Method and apparatus for coding pulse-amplitude modulated signal

Details Method and apparatus for coding pulse-amplitude modulated signal Method and apparatus for coding pulse-amplitude modulated signal

1982-06-01

1985-01-08

Sloyan, T. J.

Communications: electrical

Audible indication

Percussion-type sound producer

340347M, 375 25, H03K 1302

Patent

active

044929536

ABSTRACT:
A process, and a device for carrying out the process, is provided for coding pulse-amplitude modulated signals into PCM signals in accordance with an approximated logarithmic characteristic curve. In the process, a partial coding characteristic curve which possesses a substantially reduced dynamic scope is first produced in a known manner. In accordance with the invention, a second pre-decision is carried out which subdivides the dynamic region of the partial coding characteristic curve into two sub-regions in such a manner that the coding of the lower and upper sub-regions is effected with the same number of weighting steps. This saves one weighting step with respect to prior processes.

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