System for embedded coding of speech signals

Details System for embedded coding of speech signals System for embedded coding of speech signals

1991-12-04

1994-10-04

Fleming, Michael R.

Electrical audio signal processing systems and devices

Hearing aids, electrical

Specified casing or housing

381 36, G10L 914

Patent

active

053533739

ABSTRACT:
The set of possible excitation signals is subdivided into a plurality of subsets, the first of which provides the contribution to the coded signal necessary to set up a transmission at a minimum rate guaranteed by the network, while the others supply a contribution which, when added to that of the first subset, causes a rate increase by successive steps. At the receiving side, a decoded signal is generated by using the excitation contribution of the first subset alone if the coded signals are received at the minimum rate, while for rates higher than the minimum rate the contributions of the subsets which have allowed such rate increase are also used.

REFERENCES:
patent: 4817157 (1989-03-01), Gerson
patent: 4852179 (1989-07-01), Fette
patent: 4868867 (1989-09-01), Davidson et al.
patent: 5185796 (1993-02-01), Wilson
GLOBECOM '90 IEEE Global Telecommunications Conferrence & Exhibition, Dec. , 1990, M. Johnson et al.
ICASSP 88, Apr. 11, 1988, G. Davidson et al.
ICAASP '90 Apr. 3, 1990, Albuquerque, N. Mex.
W. Y. Chan et al. pp. 1109-1112.

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