Boots – shoes – and leggings
Patent
1987-06-05
1989-06-27
Malzahn, David H.
Boots, shoes, and leggings
G06F 1531
Patent
active
048435821
ABSTRACT:
A digital filter having K coefficients h(k) processes code words x(n-k), represented in the binary codes, of an input signal bit-parallel and uses filter coefficients h(k) represented in the CSD code. Substituting in the filter equation ##EQU1## the representation of the coefficients in the CSD code and the representation of the input code words in the binary code, the problem of converting a linear combination of powers of two, having arbitrary integral coefficients, into a binary number will occur repeatedly. Carrying out this conversion by means of cascades of Wallace Trees terminated by adders for two binary numbers results in a digital filter that is suitable for sampling rates up to 20 MHz and that can also be realized without any difficulty when an excess of 25 coefficients is needed for adhering to the required filter characteristic.
REFERENCES:
patent: 4484299 (1984-11-01), Lambourn et al.
Ulbrich et al, "MOS-VLSI Pipelined Digital Filters for Video Applications", Proceedings ICASSP 84, San Diego, Ca. Mar. 19-21, 1984, pp. 44.7.1-44.7.4.
Tewksbury, et al, "FIR Digital Filters for High Sample Rate Application", IEEE Communications Magazine vol. 25, No. 7 Jul. 1987, pp. 62-72.
Heck Berthold
Speidel Joachim
Briody Thomas A.
Haken Jack E.
Malzahn David H.
Slobod Jack D.
U.S. Philips Corporation
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