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. 02, 1997
Filed:
May. 01, 1995
Sang-Ho Kim, Seoul, KR;
Daewoo Electronics Co., Ltd, Seoul, KR;
Abstract
A post-processing method and apparatus is capable of improving the image quality of a decoded image signal by effectively reducing or removing a blocking effect in the decoded image signal. Decoded image data is first stored in a memory and target pixel data is filtered. Thereafter, an absolute difference value between original target pixel data and the filtered target pixel data is calculated and compared with a predetermined threshold value. The stored target pixel data is updated with the filtered target pixel data if the absolute difference value is smaller than the predetermined threshold value and is updated with compensated target pixel data if otherwise, wherein the compensated target pixel data is provided by adding the original target pixel data and the predetermined threshold value if the original target pixel data is smaller than the filtered target pixel data and by subtracting the predetermined threshold value from the original target pixel data if the original target pixel data is greater than the filtered target pixel data. The filtering process is repeated up to N times as long as the absolute difference value is smaller than the predetermined threshold value.