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:
Jul. 22, 2008
Filed:
Jun. 18, 2003
Monique Auvray, Lannion, FR;
Grégoire Le Tourneur, St Quay-Perros, FR;
Jean-philippe Thomas, Trevou Treguignec, FR;
Monique Auvray, Lannion, FR;
Grégoire Le Tourneur, St Quay-Perros, FR;
Jean-Philippe Thomas, Trevou Treguignec, FR;
France Telecom, Paris, FR;
Abstract
An echo processing technique for attenuating echo components of a direct signal Xin a return signal Y. A receive gain Grand a send gain Geare calculated. The receive gain Gris applied to the direct signal and an input signal Xis produced and emitted into an echo generator system. The send gain Geis applied to an output signal Yfrom the echo generator system and the return signal Yis produced. A coupling variable COR is calculated which is characteristic of the acoustic coupling between the direct signal Xor the input signal Xand the output signal Y. The receive gain Grand the send gain Geare calculated on the basis of the coupling variable.