Pitch prediction for packet loss concealment

Details Pitch prediction for packet loss concealment Pitch prediction for packet loss concealment

2006-03-20

2008-11-25

Han, Qi (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S207000, C704S208000, C704S217000

Reexamination Certificate

active

07457746

ABSTRACT:
There is provided a pitch lag predictor for use by a speech decoder to generate a predicted pitch lag parameter. The pitch lag predictor comprises a summation calculator configured to generate a first summation based on a plurality of previous pitch lag parameters, and a second summation based on a plurality of previous pitch lag parameters and a position of each of the plurality of previous pitch lag parameters with respect to the predicted pitch lag parameter; a coefficient calculator configured to generate a first coefficient using a first equation based on the first summation and the second summation, and a second coefficient using a second equation based on the first summation and the second summation, wherein the first equation is different than the second equation; and a predictor configured to generate the predicted pitch lag parameter based on the first coefficient and the second coefficient.

REFERENCES:
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patent: 5451951 (1995-09-01), Elliott et al.
patent: 5884010 (1999-03-01), Chen et al.
patent: 2002/0091523 (2002-07-01), Makinen et al.
patent: 2006/0265216 (2006-11-01), Chen
Coding of Speech at 8 kbit/s Using Conjugate-Structure Algebraic-Code-Excited Linear-Prediction(CS-ACELP), International Telecommunication Union, ITU-T Recommendation G.729, 1-35 (Mar. 1996).

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