Title:
ECHO ELIMINATION METHOD, ECHO CANCELER AND VOICE SWITCH
Document Type and Number:
WIPO Patent Application WO/1999/014868
Kind Code:
A1
Abstract:
Digitized input signals are sampled to obtain a reference input signal. The reference input signal is whitened in a pseudo way, to obtain a pseudo-whitened signal. A pseudo-echo signal is generated in accordance with the pseudo-whitened signal and an adaptive filter coefficient. An elimination error signal is generated in accordance with an echo signal and the pseudo-echo signal. The applicable filter coefficient is updated in accordance with the elimination error signal, the adaptive filter coefficient and the pseudo-whitened signal.
Inventors:
OKUDA KOZO (JP)
Application Number:
PCT/JP1998/004107
Publication Date:
March 25, 1999
Filing Date:
September 10, 1998
Export Citation:
Assignee:
SANYO ELECTRIC CO (JP)
OKUDA KOZO (JP)
OKUDA KOZO (JP)
International Classes:
H04B3/20; H04B3/23; H04M1/00; H04M9/00; H04M9/08; (IPC1-7): H04B3/23; H04M1/60
Foreign References:
| JPS642424A | 1989-01-06 | |||
| JPH08321795A | 1996-12-03 | |||
| JPH0678046A | 1994-03-18 |
Other References:
INOUE A., MAEDA Y., NISHIGUCHI M.: "SHORT TAIL ECHO CANCELLER USING WHITENING FILTER.", PROCEEDINGS OF THE SONY RESEARCH FORUM, XX, XX, 1 February 1996 (1996-02-01), XX, pages 323 - 326., XP002917627
See also references of EP 1022866A4
See also references of EP 1022866A4
Attorney, Agent or Firm:
Kayama, Hideyuki (9F 18-27, Higashinakajima 1-chome Higashiyodogawa-ku
Osaka-shi Osaka, JP)
Download PDF: