Real time pipelined system for forming the sum of products in the processing of video data

摘要: A 3-by-3 convolver utilizes 9 binary arithmetic units (10) connected in cascade for multiplying 12-bit pixel values p i which are positive or two's complement numbers by 5-bit magnitude (plus sign) weights w may be negative. The stored registers (13, 14 and 15) including the sign bits (shown separately convenience). For a negative weight, one's of value to multiplied is formed at each unit bank exclusive OR gates under control corresponding weight , correction made adding sum absolute all 3×3 kernel. Since this remains constant as long constant, it can precomputed register (16) added product PW first unit.