G - Physics – 10 – L
Patent
G - Physics
10
L
354/47
G10L 19/14 (2006.01) G10L 11/02 (2006.01) G10L 19/00 (2006.01) G10L 19/08 (2006.01) G10L 19/10 (2006.01) G10L 19/12 (2006.01)
Patent
CA 2031006
ABSTRACT There is described an improved apparatus for encoding an input speech signal into a plurality of coded signal portions (e.g., pitch, pitch gain b, Ci, G), the apparatus including a first computation circuit responsive to the input speech signal for generating at least a first (e.g., pitch and pitch gain b) of the coded signal portions, and additional means responsive to the input speech signal and to at least the first coded signal portion for generating at least a second (e.g., Ci and G) of the plurality of coded signal portions, the first computation circuit comprising iterative optimization for determining an optimum value for the first coded signal portion assuming no excitation signal, and providing a corresponding first output, determining an optimum value for the second coded signal portion based on the first output and providing a corresponding second output, determining a new optimum value for the first coded signal portion assuming the second output as an excitation signal, and providing a corresponding new first output, determining a new optimum value for the second coded value based on the new first output, and providing a corresponding new second output, and repeating the aforesaid third and fourth steps until the first and second coded signal portions are optimized.
Communications Satellite Corporation
Moffat & Co.
LandOfFree
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