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:
Jan. 03, 1995
Filed:
Jul. 19, 1993
Humor Hwang, Suwon, KR;
Samsung Electronics Co., Ltd., Kyungki-do, KR;
Abstract
A multilevel nonlinear filter in a HD-MAC decoder, for performing intra-frame filtering corresponding to a post processing, and for performing a progressive scan conversion using edge information includes a delay unit for delaying an input image signal and providing both 1H- and 2H-delayed signals, an edge level estimation signal generating unit for generating first and second window mask data from the input image signal and the delayed signals, and performing a high-speed bubble sort for the generated first and second window mask data, thereby providing first and second estimation signals, an absolute difference signal generating unit for generating an absolute difference signal, an edge detection unit for comparing the output absolute difference signal with a predetermined threshold value, thereby producing edge detection information on a current pixel, and a noise suppression unit for median-filtering the first and second estimation signals and the information on the current pixel in case of edge detection information, and averaging-filtering the first and second estimation signals in case of non-edge detection information, thereby providing a filtered signal.