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:
Oct. 21, 2008
Filed:
Jan. 18, 2005
Yukihiko Mogi, Kanagawa, JP;
Homare Nishizaki, Tokyo, JP;
Yukihiko Mogi, Kanagawa, JP;
Homare Nishizaki, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A sampling rate converter able to obtain an amplitude characteristic that passes any frequency and able to achieve a high precision conversion without depending upon a cutoff frequency, having an up samplerfor inserting (U-) zero points between signals and raising a sampling frequency Fsi U-fold, a convolution processing unitincluding an FIR filter and interpolating a value by convolution with respect to output signals of the up sampler, and a linear interpolation blockfor selecting two points of samples from the output signal of the convolution processing unithaving a sampling frequency UFsi and finding the value at a required position from the linear interpolation, wherein the FIR filter has an impulse response becoming a filter coefficient, having a transmission function H(z) associated with a transmission function Z(z) of a pre-filter, and having a filter coefficient set by performing weighted approximation with respect to a desired characteristic associated with the frequency response of the pre-filter.