Method and device for adaptive bandwidth pitch search in...

Details Method and device for adaptive bandwidth pitch search in... Method and device for adaptive bandwidth pitch search in...

2007-08-21

2007-08-21

Armstrong, Angela (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S223000

Reexamination Certificate

active

09830114

ABSTRACT:
An improved pitch search method and device for digitally encoding a wideband signal, in particular but not exclusively a speech signal, in view of transmitting, or storing, and synthesizing this wideband sound signal. The new method and device which achieve efficient modeling of the harmonic structure of the speech spectrum uses several forms of low pass filters applied to a pitch codevector, the one yielding higher prediction gain (i.e. the lowest pitch prediction error) is selected and the associated pitch codebook parameters are forwarded.

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M. V. Nazarov et al., “Techniques of Digital Processing and Transmission of Voice Signals”; Moscow, Radio i Svyaz′ publishers 1985, pp. 10-12.
“Predictive Coding of Speech Signals and Subjective Error Criteria” by Bishnus S. Atal et al., IEEE Transaction ASSP, vol. 27, No. 3, pp. 247-254 Jun. 1979.

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