CN1172292C

5G,4G,3G,2G

Title

Method and device for adaptive bandwidth pitch search in coding wideband signals

Application Number:

CN1999813601

Publication Date:

20-10-2004

Current Assignee:

VOICEAGE CORPORATION

Family ID:

4162966

Application Date:

27-10-1999

Declaring Company:

Publication Country:

US

Priority Date:

27-10-1998

View on Espacenet goto-link

Title

Method and device for adaptive bandwidth pitch search in coding wideband signals

Application Number:

CN1999813601

Family ID:

4162966

Publication Country:

US

Publication Date:

20-10-2004

Application Date:

27-10-1999

Priority Date:

27-10-1998

Current Assignee:

VOICEAGE CORPORATION

Declaring Company:

View on Espacenet goto-link

Abstract  Abstract

an improved for a wideband signal in particular but not limited to a voice signal performing digital coding to transmit or store and synthetic pitch search method and device using the broadband signal. this new method can effectively establish a model the resonant structure of the speech spectrum of the device using the application to one tone code vectors several forms of low pass filter and selecting one can achieve higher prediction gain of low-pass filter (i.e. lowest pitch prediction error) and forwards the codebook related parameters.

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.

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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