Title:
BACKGROUND NOISE CANCELLING DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/2011/129421
Kind Code:
A1
Abstract:
Disclosed is a background noise-canceling device that removes the background noise from an input signal which is an audio signal having background noise mixed therein and outputs an output signal, comprising: a storage means for preliminarily storing as the stored background noise background noise that is predictable as background noise in a state wherein a signal for synchronization is superimposed onto the predictable background noise; an estimation means for reading out from the storage means the stored background noise , acquiring a correlation between the background noise that was read out and the input signal, establishing synchronization using the signal for synchronization, and outputting the predicted noise; and a subtracting means for removing the predicted noise from the input signal and outputting an audio signal from which noise was removed.
Inventors:
MURAKAMI, Masahide (7-1 Shiba 5-chome, Minato-k, Tokyo 01, 〒1088001, JP)
Application Number:
JP2011/059326
Publication Date:
October 20, 2011
Filing Date:
April 08, 2011
Export Citation:
Assignee:
NEC Corporation (7-1 Shiba 5-chome, Minato-ku Tokyo, 01, 〒1088001, JP)
日本電気株式会社 (〒01 東京都港区芝五丁目７番１号 Tokyo, 〒1088001, JP)
日本電気株式会社 (〒01 東京都港区芝五丁目７番１号 Tokyo, 〒1088001, JP)
International Classes:
G10L21/02; H04M3/00
Attorney, Agent or Firm:
IKEDA, Noriyasu et al. (Hibiya Daibiru Bldg, 2-2 Uchisaiwaicho 1-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
Claims: