Noise and bit rate reduction arrangements

Details Noise and bit rate reduction arrangements Noise and bit rate reduction arrangements

1981-06-04

1983-11-22

Kemeny, Emanuel S.

Boots, shoes, and leggings

364900, G10L 100

Patent

active

044171021

ABSTRACT:
Improved digital encoding of an input speech signal for transmission uses an adaptive low-pass filter and adaptive coder responsive to the total spectral energy of the input signal, thereby providing reduced coder bit rate at constant coder noise, or conversely reduced coder noise at constant bit rate.

REFERENCES:
patent: 3341659 (1967-09-01), Stern
patent: 3448216 (1969-06-01), Kelley
patent: 3742395 (1973-06-01), Yoneyama
patent: 4058676 (1977-10-01), Wilkes
patent: 4142071 (1979-02-01), Croisier et al.
patent: 4216354 (1980-08-01), Esteban et al.
patent: 4227046 (1980-10-01), Nakajima et al.
patent: 4229622 (1980-10-01), Cochrane

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