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:
Jan. 30, 2018
Filed:
Nov. 19, 2014
Nec Corporation, Minato-ku, Tokyo, JP;
Atsufumi Shibayama, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
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.