The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 2000
Filed:
Jun. 16, 1998
Applicant:
Inventor:
Hideo Sano, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G10L / ;
U.S. Cl.
CPC ...
704221 ; 704223 ;
Abstract
In a CELP system, a coder and a decoder have identical codebooks, and the amount of data to be transmitted is compressed by transmission and reception of codebook indexes. Past excitation signals are stored in a memory and used as an adaptive codebook to improve the speech quality. The coder and the decoder each comprise memory means for storing index data for at least one frame, and means for generating an adaptive codebook afresh by initialization to zero for each frame when generating an excitation signal according to stored indexes.
Sano, Hideo. (2000). Adaptive codebook (U.S. Patent No. 6052660). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6052660
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