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:
Dec. 05, 2006
Filed:
May. 13, 2002
Hung-cheng Kuo, Hsinchu, TW;
Ming-hsien Tsai, Kaohsung, TW;
Hung-Cheng Kuo, Hsinchu, TW;
Ming-Hsien Tsai, Kaohsung, TW;
MediaTek Inc., Hsinchu, TW;
Abstract
A Viterbi decoder of a partial response maximum likelihood channel. In an optical disc drive, a system of partial response maximum likelihood has an analog/digital converter. This analog/digital converter receives an analog signal and outputs a digital signal to a Viterbi decoder. The Viterbi decoder has an adaptive level Viterbi decoder, a signal level mapping algorithm, a received signal delay chain, a hard decoder, and a multiplexer. The adaptive level Viterbi decoder and the hard decoder receive a digital signal output from the analog/digital converter to decode simultaneously. Whether the output of the multiplexer is the decision bit of the adaptive level Viterbi decoder or the hard decoder is determined by the mode selection algorithm.