| タイトル | Real time pipelined system for forming the sum of products in the processing of video data |
| 本文（外部サイト） | http://hdl.handle.net/2060/19880014785 |
| 著者（英） | Wilcox, Brian |
| 著者所属（英） | NASA Pasadena Office |
| 発行日 | 1988-06-07 |
| 言語 | eng |
| 内容記述 | A 3-by-3 convolver utilizes 9 binary arithmetic units connected in cascade for multiplying 12-bit binary pixel values P sub i which are positive or two's complement binary numbers by 5-bit magnitide (plus sign) weights W sub i which may be positive or negative. The weights are stored in registers including the sign bits. For a negative weight, the one's complement of the pixel value to be multiplied is formed at each unit by a bank of 17 exclusive or gates G sub i under control of the sign of the corresponding weight W sub i, and a correction is made by adding the sum of the absolute values of all the negative weights for each 3-by-3 kernel. Since this correction value remains constant as long as the weights are constant, it can be precomputed and stored in a register as a value to be added to the product PW of the first arithmetic unit. |
| NASA分類 | COMPUTER OPERATIONS AND HARDWARE |
| レポートNO | 88N24169 |
| 権利 | No Copyright |
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