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. 24, 2012
Filed:
Sep. 07, 2006
Osamu Shinya, Tokyo, JP;
Takashi Yokokawa, Kanagawa, JP;
Yuji Shinohara, Tokyo, JP;
Toshiyuki Miyauchi, Tokyo, JP;
Osamu Shinya, Tokyo, JP;
Takashi Yokokawa, Kanagawa, JP;
Yuji Shinohara, Tokyo, JP;
Toshiyuki Miyauchi, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A decoding device and method for decoding an LDPC code with high accuracy while suppressing an increase of the scale of a device. A check node calculator () performs check node calculations including calculations of a nonlinear function φ(x) and its inverse function φ(x) of the nonlinear function so as to decode an LDPC code. A variable node calculator () performs variable node calculation of a variable node so as to decode the LDPC code. The check node calculator () has an LUT which receives a fixed-point quantized value expressing a numerical value with a fixed quantization width and outputs the result of the calculation of the nonlinear function φ(x) as a semi-floating point quantized value which is a bit sequence expressing a numerical value with a quantization width determined by a part of a bit sequence and an LUT which receives a semi-floating point quantized value and outputs the result of the calculation of the inverse function φ(x) as a fixed point quantized value. The invention can be applied to e.g., a tuner for receiving a satellite broadcast.