Digital filter device, digital filter processing method, and storage medium having digital filter program stored thereon
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United States of America Patent
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Jan 30, 2018
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N/A
app pub date -
Nov 19, 2014
filing date -
Dec 13, 2013
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Abstract
Provided is a digital filter device that causes the last data of an immediately precedent input block to overlap with the input block of a time domain and generates an overlap block. The overlap block and the immediately precedent input block are each converted into a frequency domain block, subjected to filter processing, and converted into first and second time domain blocks. Among the overlap section of the first time domain block and the second time domain block, the front-end data of the first time domain block and the rear-end data of the temporal axis of the second time domain block are removed as a section of data that is to be removed, and output data is generated. An overlap amount is controlled on the basis of a distortion amount that is determined by comparing the removed section of the data of the first time region domain with the output section of the data of the overlap section of the second time domain block other than the removed section of said overlap section.
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