The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 29, 2007
Filed:
Sep. 27, 2002
Rolf Nöthlings, Stuttgart, DE;
Jens Wildhagen, Weinstadt, DE;
Rolf Nöthlings, Stuttgart, DE;
Jens Wildhagen, Weinstadt, DE;
Sony Deutschland GmbH, Cologne, DE;
Abstract
A digital filter realization is proposed that consists of only one multiplier, i. e. which operates with a higher clock rate and changes coefficient at the multiplier each clock cycle, but in which the clock rate of the multiplier is reduced in comparison to prior art filters by considering equal filter coefficients, e. g. based on the symmetry of FIR filter coefficients. According to the present invention preferably the samples belonging to equal filter coefficients are added in advance in order to reduce the number of multiplications, which concludes in a reduced clock rate for the filter, a reduced needed calculation power, and therefore a reduced power consumption.