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:
May. 28, 1996
Filed:
Mar. 08, 1994
Chun-Kai Huang, Taichung, TW;
Wei-Kuo Chia, Hsinchu, TW;
Chun-Chieh Hsiao, Taichung, TW;
Jiun-Ming Chu, Iainan, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A pixel block transfer system has a shifter, at least two registers, an extractor and a mask. Parameter evaluation logic is used to generate most of the parameters needed in the pixel block transfer. The start address of the source block, the start address of the destination block, the number of pixels in the source block and the number of rows in the source block are input to the parameter evaluation logic. The parameter evaluation logic then determines the left shift number, the number of read data, the number of write data, the two write flag, the two read flag, the left mask number and the right mask number. The start addresses, the flags and the read and write numbers are sent to a state machine. These are used to control the pixel block transfer. The left shift number is sent to the shifter and the extractor. It signifies the number of pixels to be shifted left. The left and right mask numbers are sent to the mask to control which pixels are masked and, therefore, not modifiable. The state machine also sends left and right enable signals to the mask.