Digital encoding circuitry with means to reduce quantization noi

Details Digital encoding circuitry with means to reduce quantization noi Digital encoding circuitry with means to reduce quantization noi

1979-10-29

1982-01-26

Swann, III, Glen R.

Pulse or digital communications

Repeaters

Testing

332 11D, 375 26, H03K 1322

Patent

active

043132049

ABSTRACT:
In an electrical system for generating a digitally-encoded signal from an analog signal and a reference signal, a circuit for reducing quantization noise comprises a bandpass filter which passes audible frequency components, the output of which filter is used to adjust the encode signal so as to reduce the level of audible components in a signal decoded from the encoded one.

REFERENCES:
patent: 3746990 (1973-07-01), LeDiberder et al.
patent: 3896399 (1975-07-01), McDonald
patent: 4075655 (1978-02-01), Iijima et al.
patent: 4190801 (1980-02-01), DeFreitas

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