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:
Nov. 21, 2006
Filed:
May. 22, 2003
Tomoyuki Hiura, Kanagawa, JP;
Hiroyuki Ino, Tokyo, JP;
Tomoyuki Hiura, Kanagawa, JP;
Hiroyuki Ino, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A replay signal, obtained on reproducing a recording medium, on which has been recorded a digital signal, is supplied to an input terminal (), and quantized by an A/D converter (). The so quantized signal is processed by an integrator (), formed by a first order IIR filter, so as to be adjusted in gain by an amplifier (). The quantized replay signal is also processed by a differentiator formed by a combination of a first order FIR filter () and a first order IIR filter () so as to be then adjusted in gain by an amplifier (). The resulting signal is then supplied to an adder () where it is subtracted from an output signal of the amplifier (). In this manner, the differentiation/integration equalizer, formed by an analog circuit, is constructed by a digital circuit of a simplified configuration without raising the number of orders of the filters. The replay signal is processed by differentiation/integration such as to satisfy the equalization standard.