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:
Jan. 25, 2005
Filed:
Nov. 12, 1999
Shingo Kiuchi, Iwaki, JP;
Kouichi Nakata, Iwaki, JP;
Nozomu Saito, Iwaki, JP;
Alpine Electronics, Inc., Tokyo, JP;
Abstract
The present invention provides a voice input apparatus which can extract an input voice without interrupting a generated background sound. When a talk switchis pushed down, a LMS algorithm processing partstops an update operation of a filter coefficient of an adaptive filterand stores filter coefficient W1 at this moment in a portion for storing filter coefficients. A portion for calculating filter coefficientscalculates a filter coefficient W2 of a filterto simulate a sound-transmittal line of an audio sound which is produced from a speakerand is input into microphonesby means of these stored filter coefficient W1 and various transmittal characteristics CS1, CS2 and the like. By extracting an output signal Yof the filterfrom an output signal Yof a portion for eliminating surrounding noiseby means of a computing part, audio sound components included with an operating voice collected by the microphonesare removed.