Sample rate conversion combined with filter

Details Sample rate conversion combined with filter Sample rate conversion combined with filter

2007-07-10

2007-07-10

Young, Brian (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

Data rate conversion

Reexamination Certificate

active

11318271

ABSTRACT:
Digital filtering and sample rate conversion blocks are combined in order to reduce hardware and/or computational complexity. A novel filter design is used to perform sample rate conversion. The filter may be combined with another digital filter. Two embodiment may be used to achieve this function. In a first embodiment, the filter may be clocked at a first (i.e., input) data rate (i.e., before rate conversion). In a second embodiment, the filter may be clocked at the second (i.e., output) data rate (i.e., after rate conversion). In both cases, the filter's basic structure remains essentially the same, but some extra terms are added to handle the rate conversion. The present application is directed toward a sample-rate conversion filter using the output data rate clock as the filter clock.

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patent: 5808924 (1998-09-01), White
patent: 5815102 (1998-09-01), Melanson
patent: 6150969 (2000-11-01), Melanson
patent: 6184756 (2001-02-01), Tanaka et al.
patent: 6480129 (2002-11-01), Melanson
“Design of IIR Filters” (Samir V. Ginde & Joseph A.N. Noronha), Virginia Polytechnic and State University, (www.ee.vt.edu/˜jnoronha/dsp—proj2—report.pdf), undated.
“Infinite Impulse Response” (http://en.wikipedia.org/wiki/Infinite—impulse—response) from Wikipedia, the free encyclopedia, undated.

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