Global Patent Index - EP 1103956 A3

EP 1103956 A3 2001-12-05 - Exponential reduction of echo and noise during speech pauses

Title (en)

Exponential reduction of echo and noise during speech pauses

Title (de)

Exponentielle Echo- und Geräuschabsenkung in Sprachpausen

Title (fr)

Réduction exponentielle de bruit et d'écho pendant les pauses de la parole

Publication

EP 1103956 A3 (DE)

Application

EP 00124577 A

Priority

DE 19957221 A

Abstract (en)

[origin: EP1103956A2] The exponential echo (E) and noise (N) reduction system samples the received signal regularly and has a speech pause detector (SPD) to scale down the cancellation constant (a0(k)) used to weight the stored best estimate of noise power spectral density (g(S/N)) during pauses.

IPC 1-7 (main, further and additional classification)

G10L 21/02; H03G 3/34

IPC 8 full level (invention and additional information)

H04R 3/02 (2006.01); G10L 21/0208 (2013.01); H04B 3/20 (2006.01); G10L 21/0216 (2013.01)

CPC (invention and additional information)

G10L 21/0208 (2013.01); G10L 2021/02082 (2013.01); G10L 2021/02168 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

EP 1103956 A2 20010530; EP 1103956 A3 20011205; EP 1103956 B1 20050608; AT 297590 T 20050615; DE 19957221 A1 20010531; JP 2001202100 A 20010727; KR 20010051980 A 20010625; US 6999920 B1 20060214

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