Compandor with sampling and equalization

Details Compandor with sampling and equalization Compandor with sampling and equalization

1979-07-09

1981-02-24

Gensler, Paul L.

Wave transmission lines and networks

Amplitude compression and expansion systems

179 1P, 179 1VL, 330 52, 330144, 333 16, 455 72, H04B 164

Patent

active

042530725

ABSTRACT:
A syllabic compandor using a pilot in the signal frequency band, with a compression ratio between approximately 2 and 20, including a frequency and delay equalizer in the negative-feedback loss-control circuits of the compressor and expandor, to permit high compression and expansion ratios without positive feedback at any frequency or signal level, the expansion ratio materially less than the compression ratio in some cases, and sampling at more than the Nyquist frequency for the signal band to remove any unwanted periodic wave such as the pilot wave, lying in the signal frequency band, from the output, without altering phase and amplitude of other waves in the signal frequency band.

REFERENCES:
patent: 3559068 (1971-01-01), Almering et al.
patent: 3732371 (1973-05-01), Burwen

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