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:
May. 18, 1999
Filed:
Jul. 12, 1995
Applicant:
Inventors:
Assignee:
France Telecom, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G10L / ;
U.S. Cl.
CPC ...
704203 ; 704201 ;
Abstract
A process and a system for adaptive filtering of a digital telephone signal, in which the digital telephone signal is submitted to a frequency transformation and to a sub-band filtering in order to produce a plurality of sub-band signals. Each of the sub-band signals is submitted in turn to an adaptive filtering starting from a reference signal based on a long-term statistics regarding the telephone signal, equalization by blind deconvolution of the effects of the telephone transmission lines on the digital telephone signal thus being obtained.