US 6,983,012 B1 | ||
Implementation of digital filter with reduced hardware | ||
Jiang Shen, Anhui (China) | ||
Assigned to Golden Bridge Technology Incorporated, Long Branch, N.J. (US) | ||
Filed on Jul. 26, 2001, as Appl. No. 9/912,452. | ||
Claims priority of provisional application 60/222666, filed on Aug. 03, 2000. | ||
Int. Cl. H03H 7/30 (2006.01); H04B 1/10 (2006.01); G06F 17/10 (2006.01) |
U.S. Cl. 375—229 | 12 Claims |
1. A method of digital filtering of a digitized input stream in accordance with a predetermined filter function approximating
a sum of products of a series of one or more first coefficient values and a series of one or more delayed samples from a digital
output stream added together with a sum of products of a series of one or more second coefficient values and a series comprising
one or more samples from the digital input stream, the digital filtering method comprising the steps of:
combining predetermined sets of one or more samples from the digital input stream and one or more samples from the digital
output stream, to form a plurality of respective numeric input values;
scaling each of the plurality of respective numeric input values by a different power of a base numeric value for the digital
filtering, to form a respective one of a plurality of scaled values; and
adding the scaled values together to form the digital output stream in accordance with the predetermined filter function.
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