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:
Aug. 21, 2012
Filed:
Dec. 14, 2007
Kaoru Sato, Kanagawa, JP;
Toshiyuki Morii, Kanagawa, JP;
Kaoru Sato, Kanagawa, JP;
Toshiyuki Morii, Kanagawa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Disclosed is an adaptive sound source vector quantization device capable of reducing deviation of the quantization accuracy of the adaptive sound source vector quantization of each sub-frame when performing an adaptive sound source vector quantization in a sub-frame unit by using a greater information amount in a first sub-frame than in a second sub-frame. In this device: when the device performs the adaptive sound source vector quantization of the first sub-frame, an adaptive sound source vector generation unit () cuts out an adaptive sound source vector of length r (r, n, m are integers satisfying the relationship: m < r=n: n is a frame length, m is a sub-frame length) from an adaptive sound source codebook (); a synthesis filter () generates an impulse response matrix of r r by using a linear prediction coefficient of the first sub-frame inputted; a search target vector generation unit () generates a search target vector by using a target vector of the sub-frame unit; and an evaluation scale calculation unit () calculates the evaluation scale of the adaptive sound source vector quantization.