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:
Feb. 14, 1978
Filed:
Jun. 01, 1976
Yoichi Tokura, Kodaira, JA;
Shinichiro Hashimoto, Koganei, JA;
Abstract
The voiced and unvoiced conditions of a speech signal are judged by combining a ratio (defined as the parcor coefficient k.sub.1) .phi.(.tau.s)/.phi.(o) between the value .phi.(o) of the autocorrelation function of the speech signal at a zero delay time, and the value .phi.(.tau.s) of the autocorrelation function at a delay time .tau.s of the sampling period with a parameter extracted from the speech signal by a correlation technique and representing the degree of periodicity (P.sub.m) of the speech signal. By comparing the result of the combination against a predetermined threshold it can be determined whether the speech signal is in a voiced condition or in an unvoiced condition.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile