1980-04-30
1982-07-20
Nusbaum, Mark E.
G10L 100
Patent
active
043407811
ABSTRACT:
Computation of the partial correlation coefficients (PARCOR K.sub.i) of a signal, using less cascaded hardware, is implemented by first deriving a sequence of auto-correlation coefficients (v.sub.j) which are then transformed into a sequence of K.sub.i using a single section digital filter plus recirculating circuitry for data iteration.
REFERENCES:
patent: 4052563 (1977-10-01), Noda et al.
Itakura et al., "Digital Filtering Techniques etc.", Seventh Int'l. Congress on Acoustics, Budapest, 1971, pp. 261-264.
Kolke et al., "Parcor Audio Response Unit", Review of Elect. Comm. Labs., May-Jun. 1975, pp. 490-501.
Esteban, et al., "Low Bitrate Predictive Voice Encoding", IBM Tech. Discl. Bull., Sep. 1976, pp. 1279-1280.
Roux, "A Fixed Point Computation of Parcor Coefficients", IEEE Trans. on Acoustics etc., Jun. 1977, pp. 257-259.
Ichikawa Akira
Nakajima Akira
Nakata Kazuo
Ohta Yoshihiro
Umemura Kazuhiro
Hitachi , Ltd.
Kemeny E. S.
Nusbaum Mark E.
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