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:
Jun. 06, 2000
Filed:
May. 21, 1997
Applicant:
Inventors:
Akira Inoue, Tokyo, JP;
Yuji Maeda, Tokyo, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10L / ;
U.S. Cl.
CPC ...
375345 ; 375349 ; 375350 ; 704225 ; 4552351 ;
Abstract
A second post filter having characteristics similar to those of a first post filter used in the signal path is prepared and a gain of the first post filter is preliminarily presumed from an input and an output of the second post filter. An optimum scaling value when performing a filtering operation in the first post filter is set by using the gain obtained from the input and output of the second post filter, so that an optimum gain when controlling a gain fluctuation caused by the first post filter is set.