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. 17, 2012
Filed:
Mar. 10, 2005
Applicant:
Mitsugi Fukushima, Tokyo, JP;
Inventor:
Mitsugi Fukushima, Tokyo, JP;
Assignee:
D&M Holdings, Inc., Kawasaki-shi, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10L 21/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
Digital audio sample data are adaptively processed for interpolation based on whether the frequency at which the digital audio signal samples reverse polarity is at least equal to a predetermined threshold, the threshold being determined by their sampling frequency. If so, the digital audio signal samples are subjected to zero-order interpolation, with zero-inserting between the samples followed by lowpass filtering; if not, the samples are subjected to Lagrange (spline) interpolation processing.