Sampling frequency conversion apparatus

Details Sampling frequency conversion apparatus Sampling frequency conversion apparatus

2008-01-22

2009-10-27

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

Data rate conversion

C708S313000

Reexamination Certificate

active

07609181

ABSTRACT:
In a sampling frequency conversion apparatus, an input sample register stores a predetermined number of input samples as an original sequence of input samples for an interpolative operation. A coefficient generating part prepares a first sequence of interpolative coefficients corresponding to an oversampled sequence of input samples which are obtained by inserting nominal input samples of zero values to the input samples stored in the input sample register, and generates a second sequence of interpolative coefficients which are extracted from the first sequence of the interpolative coefficients and which correspond to the original sequence of the input samples. A convolutional operation part convolutes the second sequence of the interpolative coefficients with the original sequence of the input samples so as to output an interpolated sample.

REFERENCES:
patent: 6636165 (2003-10-01), Freidhof
patent: 6889239 (2005-05-01), Akahori
patent: 7061409 (2006-06-01), Jantti et al.
patent: 2006/0188052 (2006-08-01), Mochizuki et al.
patent: 2002-158561 (2002-05-01), None
patent: 2006238044 (2006-09-01), None
patent: 2006261812 (2006-09-01), None
Japanese Patent Office: Office Action, “Notice of Reasons for Refusal” for Patent Application No. 2007-012076, dated Mar. 3, 2009, (4 pgs.).

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