Data processing: speech signal processing – linguistics – language – Speech signal processing – Recognition
Patent
1998-01-13
2000-08-15
Dorvil, Richemond
Data processing: speech signal processing, linguistics, language
Speech signal processing
Recognition
704207, G10L 914
Patent
active
061049948
ABSTRACT:
A method of coding speech under background noise conditions wherein during active voice speech segments an analysis-by-synthesis method is used. However, when a background noise segment is detected, an adaptive code book (pitch prediction) contribution is used as a source of a pseudo-random sequence in order to provide a better representation of the background noise. An improved gain quantization scheme is also employed when a background noise segment is detected, wherein an energy of the total excitation with quantized gains is matched to an energy of total excitation with unquantized gains.
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International Telecommunication Union ITU-Recommendation G.729, General Aspects of Digital Transmission Systems; Coding of Speech at 8 kbit/s Using Conjugate-Structure Algebraic-Code Excited Linear-Prediction (CS-ACELP) (Mar. 1996).
Benyassine Adil
Su Huan-Yu
Thyssen Jes
Yuen Eric Kwok Fung
Conexant Systems Inc.
Dorvil Richemond
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