Speech coding apparatus and speech decoding apparatus

Details Speech coding apparatus and speech decoding apparatus Speech coding apparatus and speech decoding apparatus

Filed on

2008-07-08

Date issued

2008-07-08

Examiner

Armstrong, Angela A (Department: 2626)

Patent Class

Data processing: speech signal processing, linguistics, language

SubClass

Speech signal processing

SubSubClass

For storage or transmission

Type

Reexamination Certificate

Status

active

Patent number

07398206

Description

ABSTRACT:
First codebook and second codebook respectively have two subcodebooks, and in respective codebooks, addition sections obtain respective excitation vectors by adding sub-excitation vectors fetched from respective two subcodebooks. Addition section obtains an excitation sample by adding those excitation vectors. According to the aforementioned constitution, it is possible to store sub-excitation vectors with different characteristics in respective sub-codebooks. Therefore, it is possible to correspond to input signals with various characteristics, and achieve excellent sound qualities at the time of decoding.

REFERENCES:
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patent: 5737484 (1998-04-01), Ozawa
patent: 5963896 (1999-10-01), Ozawa
patent: 5991717 (1999-11-01), Minde et al.
patent: 7110943 (2006-09-01), Morii et al.
patent: 5-165497 (1993-07-01), None
patent: 5-232994 (1993-09-01), None
patent: 6-222797 (1994-08-01), None
patent: 91/13432 (1991-09-01), None
patent: 95/16260 (1995-06-01), None
“Code Excited Linear Prediction (CELP): High-Quality Speech At Very Low Bit Rates”, M.R. Schroeder, ICASSP'85, Proceedings, pp. 937-940 (1985).
“Adaptive Density Pulse Excitation for Low Bit Rate Speech Coding”, M. Akamine et al., IEICE Trans. on Fundamentals of Electronics, Communications and Computer Sciences, vol. E78-A, No. 2 (1995).
“CELP Coding With An Adaptive Density Pulse Excitation Model”, M. Akamine et al., ICASSP'90, Speech and Processing 1, pp. 29-32, (Apr. 3, 1990).
English Language Abstract of JP 6-222797.
English Language Translation of the Notice of Reason for Rejection.
Notice of Reason for Rejection in Japanese.
English Language Abstract of JP 5-232994.
English Language Abstract of JP 5-165497.
English Language Abstract of JP 6-222797.

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