Transmitter for forming non-linear pulse code modulated samples

Details Transmitter for forming non-linear pulse code modulated samples Transmitter for forming non-linear pulse code modulated samples

1973-10-25

1977-03-01

Safourek, Benedict V.

325 38R, H04B 104

Patent

active

040104222

ABSTRACT:
A non-linear pulse code modulator wherein input signals are coded into digital representations of amplitude range segments and amplitude in excess of the minimum amplitude within the respective range segment uses a first analog-to-digital converter having a sawtooth-shaped control characteristic to determine the amplitude range segment from an input signal sample. The output of the first analog-to-digital converter is used to effectively divide the signal sample by a factor 2.sup.n, where n corresponds to the determined range. The result of the division is then converted in a second analog-to-digital conversion to a digital signal that is combined with the digital range segment signal for transmission thereof.

REFERENCES:
patent: 3708624 (1973-01-01), Boxall
patent: 3784922 (1974-01-01), Blahut
patent: 3798637 (1974-03-01), Fruhauf
patent: 3815033 (1974-06-01), Tewksbury
patent: 3831092 (1974-08-01), Greefkes

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