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:
May. 09, 2000
Filed:
Feb. 26, 1998
Akitoshi Saito, Hamamatsu, JP;
Yamaha Corporation, Shizuoka-ken, JP;
Abstract
In a speech coding apparatus, an input device inputs a mixed speech signal of a plurality of speakers. A separating device analyzes period characteristics of the input mixed speech signal, and separates the same signal into a plurality of single speech signals each associated with a corresponding one of the speakers, based on a result of the analysis. A first extracting device extracts source speech characteristic parameters included in each of the single speech signals. A second extracting device extracts a generic vocal-tract characteristic parameter from the input mixed speech signal. In a speech decoding apparatus, a first input device inputs the source speech characteristic parameters for each of the speakers. A second input device inputs the vocal-tract characteristic parameter. A source speech decoder decodes source speech signals of the respective speakers, based on the source speech characteristic parameters for the speakers and forms a source speech signal for the speakers by synthesizing the decoded source speech signals of the respective speakers. A vocal-tract filter filters the source speech signal for the speakers, based on the generic vocal-tract characteristic parameter, so as to decode a mixed speech signal indicative of mixed speech of the speakers.