Title:
DISTORTION ADDING DEVICE
Document Type and Number:
Japanese Patent JP2775570
Kind Code:
B2
Abstract:
PURPOSE: To provide a non-linear converter into which aliasing noise is not mixed so much, in a distortion adder of digital processing type.
CONSTITUTION: In a digital processing type distortion adder in which a digital signal converted by A/D converter is inputted to a non-linear converter 4 through a digital filter, nonlinear distortion is given by the non-linear converter 4, desired frequency component is taken out by a filter of a digital filter group from a digital signal to which this nonlinear distortion is given and outputted, this device has such a structure that an up-sampler 8 is arranged at a prestage side of the non-linear converter, a down-sampler 9 is arranged on a poststage side of the non-linear converter 4, while Ny-quist frequency in the non-linear converter is increased by increasing sampling frequency by N times in the up-sampler 8, and a level so aliasing noise at Nyquist frequency is reduced.
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Inventors:
ADACHI MASAHITO
Application Number:
JP12300793A
Publication Date:
July 16, 1998
Filing Date:
May 26, 1993
Export Citation:
Assignee:
KORUGU KK
International Classes:
G10H1/16; H03H17/00; H03H17/02; H03H21/00; (IPC1-7): G10H1/16
Domestic Patent References:
| JP642100A |
Attorney, Agent or Firm:
Kusano Taku (1 person outside)