Wideband adaptive prediction

Details Wideband adaptive prediction Wideband adaptive prediction

1985-05-23

1987-03-31

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

332 11D, H04B 1406

Patent

active

046548637

ABSTRACT:
Superior performance, better tracking, and stability of an adaptive predictor are realized by employing a so-called high order (eighth) prediction filter and by updating the filter coefficients in accordance with an algorithm based on the sign of a reconstructed signal sample (s.sub.q (k)) multiplied by a quantized version (e.sub.q (k)) of a differential error signal normalized by an expected magnitude of the reconstructed signal sample.

REFERENCES:
patent: 4179710 (1979-12-01), Ishigura et al.
patent: 4317208 (1982-02-01), Araseki et al.
patent: 4319360 (1982-03-01), Cointot
patent: 4470146 (1984-09-01), Yatsuzuka et al.
patent: 4475227 (1984-10-01), Belfield
patent: 4538234 (1985-08-01), Honda et al.
"Adaptive Quantization with a One-Word Memory", Bell System Technical Journal, vol. 52, No. 7, Sep. 1973, N. S. Jayant, pp. 1119-1144.
"32 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM)", CCITT Study Group XVIII.

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