Interpolation filter selection circuit for sample rate conversio

Coded data generation or conversion – Digital code to digital code converters – Tree structure

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341 61, 348720, G06F 1200

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active

056130848

ABSTRACT:
A filter selector generates a filter address value to select one of a number of frequency characteristics of a filter to resample a first data signal from a first segment of data in order to generate second sampled data signal in a second segment of data. The filter selector includes an adder which adds a resampling factor to a previous address value to generate a current address value if the previous address value is less than a comparator value and which subtracts the comparator value from the previous address value to generate the current address value if the previous address value is greater than or equal to the comparator value. The current address value is shifted by n bits, where n is an integer, to generate the filter address value.

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patent: 5057911 (1991-10-01), Stec et al.
patent: 5274372 (1993-12-01), Luthra et al.
patent: 5331346 (1994-07-01), Shields et al.
patent: 5481568 (1996-01-01), Yada

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