Title:
標本化レート変換装置
Document Type and Number:
Japanese Patent JP5573926
Kind Code:
B2
Abstract:
A position coordinate difference computing unit (5a to 5c) calculates position coordinate differences between position coordinates of the output digital signals and position coordinates of the input digital signals adjacent to the position coordinates. An FIR coefficient memory (13a to 13c) stores FIR coefficients of an FIR-LPF and outputs FIR coefficients corresponding to position coordinate differences between a fixed number of the output digital signals adjacent to the position coordinates of the output digital signals and the output digital signals. A control unit (11) supplies a group of the FIR coefficients and a group of the input digital signals corresponding to the respective position coordinate differences to the parallel FIR calculator (4) in predetermined order when the position coordinate differences corresponding to two or more different output digital signals are concurrently computed. The parallel FIR calculator (4) performs an FIR-LPF interpolating calculation by using those to obtain the output digital signals.
Inventors:
Yuichiro Koike
Yasuhiro Yamada
Yasuhiro Yamada
Application Number:
JP2012256368A
Publication Date:
August 20, 2014
Filing Date:
November 22, 2012
Export Citation:
Assignee:
NTT Electronics, Inc.
International Classes:
H03H17/00; H03H17/06
Attorney, Agent or Firm:
Takada 守
Hideki Takahashi
Kuno 淑己
Hideki Takahashi
Kuno 淑己