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. 22, 2013
Filed:
Sep. 22, 2011
Fang-ming Yang, Hsinchu, TW;
Fang-Ming Yang, Hsinchu, TW;
Sunplus Technology Co., Ltd., Hsinchu, TW;
Abstract
A horizontal synchronization signal detection system includes a coarse period estimator and a fine period time estimator. The coarse period estimator estimates a minimum value and corresponding position of each period of a CVBS signal to calculate a coarse period of a horizontal synchronization signal. The fine period time estimator divides the horizontal synchronization signal into a first part and a second part so as to generate a first sum and a second sum by adding signals of the first part and the second part, and detects a middle point of the horizontal synchronization signal when the first sum equals the second sum. The steps of fine-tuning the coarse period to generate a fine-tuned coarse period, extracting the horizontal synchronization signal according to the fine-tuned coarse period, and determining whether the first sum is equal to the second sum are repeatedly executed until the first sum equals the second sum.