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:
Apr. 06, 2010
Filed:
Dec. 20, 2004
Tomofumi Yamanashi, Osaka, JP;
Kaoru Sato, Osaka, JP;
Toshiyuki Morii, Osaka, JP;
Pansonic Corporation, Osaka, JP;
Abstract
A voice and musical tone coding apparatus is provided that can perform high-quality coding by executing vector quantization taking the characteristics of human hearing into consideration. In this voice and musical tone coding apparatus, a quadrature transformation processing section () converts a voice and musical tone signal from time components to frequency components. An auditory masking characteristic value calculation section () finds an auditory masking characteristic value from a voice and musical tone signal. A vector quantization section () performs vector quantization changing a calculation method of a distance between a code vector found from a preset codebook and a frequency component based on an auditory masking characteristic value.