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:
Nov. 03, 2009
Filed:
Oct. 22, 2008
Tetsuichi Nakae, Ome, JP;
Tetsuichi Nakae, Ome, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
A reverberation effect adding device comprising a first convolution circuit which in turn comprises FIR filters (-to-) and an adder (accumulator) () which adds outputs from the FIR filters, a moving average circuit () which receives musical sound waveform data delayed by a predetermined number of stages in the first convolution circuit and which outputs averaged second musical sound waveform data obtained by sampling at a second sampling frequency lower than the first sampling frequency, a second convolution circuit which in turn comprises FIR filters (-to-) which sequentially receive the second musical sound waveform data obtained by sampling at the second sampling frequency and an adder (accumulator) (), an interpolator () which receives an output from the adder () of the second convolution circuit, calculates an interpolated value of the output value from the adder (), and provides the output from the adder () and the interpolated value from the interpolator () sequentially at the first sampling frequency, and an adder () which adds the outputs from the adder () and the interpolator () and outputs a result of the addition as reverberation data.