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:
Oct. 01, 1991
Filed:
Dec. 19, 1989
Applicant:
Inventor:
Takashi Yazu, Tokyo, JP;
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G10L / ;
U.S. Cl.
CPC ...
381 37 ; 381 30 ; 381 31 ; 381 36 ;
Abstract
In a method and apparatus for the analysis and synthesis of voice signals wherein frequency bands of voice signals are divided into several sub-bands with subsequent separate coding and synthesis of each subdivision channel signals, the amplitude level of each subdivision channel signal in a predetermined interval of time (frame length) is evaluated and only those subdivision channel signals for which the above-mentioned amplitude level exceeds a predetermined reference level established for each subdivision channel is coded.