Method and system for a waveform attenuation technique for...

Details Method and system for a waveform attenuation technique for... Method and system for a waveform attenuation technique for...

Filed on

2007-12-11

Date issued

2007-12-11

Examiner

{hacek over (S)}mits, Tálivaldis Ivars (Department: 2626)

Patent Class

Data processing: speech signal processing, linguistics, language

SubClass

Speech signal processing

SubSubClass

Synthesis

Other Related Categories

C704S219000, C704S228000

Type

Reexamination Certificate

Status

active

Patent number

10183451

Description

ABSTRACT:
A method and system are provided for processing an extrapolated signal including a number of consecutive replacement frames. The method comprises attenuating a portion of the extrapolated signal when the extrapolated signal reaches a predetermined duration. The attenuating produces an output signal having an attenuated portion, wherein the output signal includes the number of consecutive replacement frames. Each of the consecutive frames within the attenuated portion is attenuated by applying an attenuation window with a starting magnitude value of approximately 1 and including a unique ending magnitude. The unique ending magnitudes decrease over time.

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European Search Report issued Jun. 28, 2004 for Appln. No. EP 02 25 5673, 3 pages.
Watkins, Craig R. et al., “Improving 16KB/s G.728 LD-CELP Speech Coder for Frame Erasure Channels,” Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on Detroit, MI, USA May 9-12, 1995, New York, NY, USA, IEEE, US, May 9, 1995, pp. 241-244.
ITU-T Study Group 16: “Frame or Packet Loss Concealment for the LD-CELP Decoder,” ITU-T Recommendation G. 728 Annex 1, May 27, 1999, pp. 1-19.

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