Boots – shoes – and leggings
Patent
1981-10-30
1984-06-12
Malzahn, David H.
Boots, shoes, and leggings
G06F 1531
Patent
active
044545908
ABSTRACT:
The device performs the function ##EQU1## for image processing, where W.sub.i are fixed weights for any specific application. It uses a PROM and accumulator algorithm, in which the memory stores the values ##EQU2## in 2.sup.M words, with addresses formed from one bit of each data word in a given bit position. In operation the most significant bit of each data word is used first to address memory, and in successive clock cycles the other bit positions are used down to the least significant. The memory output words are supplied to the adder-accumulator, and in each clock cycle the adder-accumulator output is shifted left one bit and used as a second input thereof. Then if the data words have N bits designated j=0 to N-1, after N clock cycles the memory output words have each been effectively multiplied by 2.sup.j and accumulated in the sum.
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H. J. DeMan et al., "High Speed NMOS Circuits for ROM-Accumulator and Multiplier Type Digital Filter", IEEE Journal Solid State Circuits, vol. SC-13, (Oct. 1978), p. 565.
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IBM Technical Disclosure Bulletin, vol. 17, No. 9, Feb. 1975, Digital Filter, M. Tubania, pp. 2656-2658.
IEEE Proc., vol. 128, Pte., No. 3, May 1981, Speed Optimized Microprocessor Implementation of a Digital Filter, B. S. Tan & G. J. Hawkins, pp. 85-94.
Belt Ronald A.
Couturier Guy D.
Franz Bernard E.
Malzahn David H.
Schatoff Oleg
Singer Donald J.
The United States of America as represented by the Secretary of
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