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:
Jun. 01, 1993
Filed:
Mar. 21, 1991
Charles C Alleyne, West Haven, CT (US);
Kevin J Bruemmer, Southington, CT (US);
Dictaphone Corporation, Stratford, CT (US);
Abstract
For speech signals that represent a wave form and include a sequence of samples, a method is provided for modifying the time scale of the speech signals. The method includes estimating the number of the samples that constitutes a pitch period. The estimate is made by a plurality of pitch estimators that operate in parallel and process peak and/or valley measurements of the wave form. The method also includes combining a first group of samples with a second group of samples to form a combined group. Each group consists of the same number of sequential samples from the sequence of samples. The number of samples in each group is equal to the estimated number of samples that constitutes a pitch period. The second group of samples immediately follows the first group in the sequence of samples. According to another feature of the invention, the method includes determininq whether the time scale of the speech signals is to be compressed or expanded. If the time scale is to be compressed a combined group is periodically reproduced instead of the first and second groups. If the time scale is to be expanded, a combined group is periodically reproduced after reproducing the first group and before reproducing the second group.