Title:
INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND PROGRAM
Document Type and Number:
Japanese Patent JP2015082762
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To solve such a problem that prediction accuracy of an adaptive filter based on sign algorithm may be reduced.SOLUTION: An information processing device includes: a prediction value calculation part which calculates a prediction value of a second signal from a first inputted signal vale and a prediction coefficient as a signal prediction value; a prediction residue calculation part which calculates the difference between a second inputted signal value and the signal prediction value calculated by the prediction value calculation part as a predictive residual; a prediction coefficient calculation part which calculates a prediction coefficient updating value based on sign algorithm using the prediction coefficient, the first signal value, and the prediction residue as variables; and a prediction coefficient change part which determines whether or not the prediction coefficient is changed to the prediction coefficient updating value based on the prediction residue and an updated prediction residue newly calculated using the prediction coefficient updating value.
Inventors:
HATAO ATSUSHI
Application Number:
JP2013220369A
Publication Date:
April 27, 2015
Filing Date:
October 23, 2013
Export Citation:
Assignee:
NEC CORP
International Classes:
H03H21/00; G10L19/00; G10L21/0208; H03H17/02
Domestic Patent References:
| JPS59139732A | 1984-08-10 | |||
| JP2000278186A | 2000-10-06 | |||
| JPH09312581A | 1997-12-02 | |||
| JPH08213880A | 1996-08-20 |
Attorney, Agent or Firm:
Baba Shiba
Sakai Hiromi
Sakai Hiromi