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. 02, 1992
Filed:
Mar. 05, 1990
Koichi Shiraki, Kanagawa, JP;
Kunio Nakajima, Kanagawa, JP;
Abstract
A speech coder utilizing previously stored sound source vectors to generate synthetic speech, a distortion computing circuit for computing a distortion of synthetic speech from input speech and a selection circuit for selecting the sound source vector that provides minimum distortion. Sound source vectors are stored within a plurality of reduced size code books rather than a single larger code book. A vector adder adds the sound source vectors respectively output from each of the reduced code books thereby generating a single sound source vector for comparison with the input speech. The distortion circuit computes the distortion for this sound source vector by analyzing the sound source vectors respectively output from each of the reduced code books in addition to the sound source vector output from the vector adder. The computational complexity required to determine the distortion is greatly reduced from the complexity required if a single larger code book of sound source vectors is utilized.