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. 07, 2009
Filed:
Apr. 30, 2004
Gene Ho Sonu, San Jose, CA (US);
Gene Ho Sonu, San Jose, CA (US);
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abstract
A method and apparatus in an optical disk system employing a look-ahead data detection technique is described where an optimum detection is achieved with a minimum hardware complexity. In one embodiment, the boundary functions and the corresponding boundary decisions are derived for next state determination using only the minimum distance event pair for each state over the look-ahead samples, thereby reducing the detector hardware significantly relative to the Viterbi counterpart where the most likely occurring path is searched at every state. Depending on the sample quality, the limits for the boundary decisions can be programmable to combat the channel impairments like misequalzation, signal asymmetry, etc.