CN1229775C

5G,4G,3G,2G

Title

Gain-smoothing in wideband speech and audio signal decoder

Application Number:

CN2000815854

Publication Date:

30-11-2005

Current Assignee:

Family ID:

Application Date:

17-11-2000

Declaring Company:

Publication Country:

US

Priority Date:

18-11-1999

Title

Gain-smoothing in wideband speech and audio signal decoder

Application Number:

CN2000815854

Family ID:

Publication Country:

US

Publication Date:

30-11-2005

Application Date:

17-11-2000

Priority Date:

18-11-1999

Current Assignee:

Declaring Company:

Abstract  Abstract

for correcting the innovation code vector amplitude gain smoothing method and device with the background noise previously sampled wideband signal. gain smoothing calculator and calculating a smoothed gain of gain smoothing device comprises a response represents a sampling factor wideband signal of sounding representing a set of stability of linear prediction filter coefficient factor and the innovation codebook gain. The gain smoothing device further comprises one of a smooth gain to amplify the innovation code vector so as to produce amplifier gain smoothing of the innovation code vector. the function of gain smoothing device improves the quality of the perceived background noise under the condition of synthesizing signal exists in sampling the broadband signal.

The gain smoothing method and device modify the amplitude of an innovative codevector in relation to background noise present in a previously sampled wideband signal. The gain smoothing device comprises a gain smoothing calculator for calculating a smoothing gain in response to a factor representative of voicing in the sampled wideband signal a factor representative of the stability of a set of linear prediction filter coefficients and an innovative codebook gain. The gain smoothing device also comprises an amplifier for amplifying the innovative codevector with the smoothing gain to thereby produce a gain-smoothed innovative codevector. The function of the gain-smoothing device improves the perceived synthesized signal when background noise is present in the sampled wideband signal.

The gain smoothing method and device modify the amplitude of an innovative codevector in relation to background noise present in a previously sampled wideband signal. The gain smoothing device comprises a gain smoothing calculator for calculating a smoothing gain in response to a factor representative of voicing in the sampled wideband signal a factor representative of the stability of a set of linear prediction filter coefficients and an innovative codebook gain. The gain smoothing device also comprises an amplifier for amplifying the innovative codevector with the smoothing gain to thereby produce a gain-smoothed innovative codevector. The function of the gain-smoothing device improves the perceived synthesized signal when background noise is present in the sampled wideband signal.

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.