TRANSMISSION SYSTEM, TERMINAL UNIT, ENCODER, DECODER AND ADAPTIVE FILTER Russian patent published in 1998 - IPC

FIELD: communications. SUBSTANCE: device has encoder, which performs signal encoding, transmitter, receiver and decoder. Decoder is equipped with prediction adaptive filter which is used for encoding of voice or sound signals in order to decrease bit transmission rate. Filter weights for prediction filter (10A, 10B) are determined by recursive calculation using Levinson-Derbin recursion for fixed-point arithmetic operations. EFFECT: simplified design, decreased cost of calculations without loss in precision. 10 cl, 4 dwg