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. 18, 2006
Filed:
Sep. 25, 2002
Chang-yong Son, Seoul, KR;
Vladimir Shin, Kyungki-do, KR;
Sang-ryong Kim, Kyungki-do, KR;
Samsung Electronics Co., Ltd., Suwon, KR;
Abstract
An apparatus and a method for computing a Speech Absence Probability (SAP), and an apparatus and a method for removing noise by using the SAP computing device and method are provided. The provided SAP computing device for computing the SAP indicating probability that speech is absent in a mframe, from a first through Ncposteriori (Nc means the total number of channels) Signal to Noise Ratios (SNR) calculated with regard to the mframe of a speech signal and a first through Ncpredicted SNRs predicted with regard to the mframe, includes: a first through Nclikelihood ratio generators for generating a first through Nclikelihood ratios from the first through Ncposterior SNRs and the first through Ncpredicted SNRs, and outputting them; a first multiplying unit for multiplying the first through Nclikelihood ratios by a predetermined a priori probability, and outputting the multiplication results; an adding unit for adding each of the multiplication results received from the first multiplying unit to a predetermined value, and outputting the added results; a second multiplying unit for multiplying the added results received from the adding unit and outputting the multiplication result; and a inverse number calculator for calculating inverse number of the multiplication result received from the second multiplying unit and outputting the calculated inverse number as the SAP. Therefore, since the accuracy of the calculated SAP is high, noise can be efficiently removed from the speech signal that may have noise and an enhanced speech signal with an enhanced quality can be provided.