EP 1190417 A1 20020327 - CANCELLATION OF NON-STATIONARY INTERFERING SIGNALS FOR SPEECH RECOGNITION
Title (en)
CANCELLATION OF NON-STATIONARY INTERFERING SIGNALS FOR SPEECH RECOGNITION
Title (de)
AUSLÖSCHUNG NICHT-STATIONÄRER INTERFERENZSIGNALE FÜR DIE SPRACHERKENNUNG
Title (fr)
ANNULATION DE SIGNAUX BROUILLEURS NON FIXES POUR LA RECONNAISSANCE VOCALE
Publication
Application
Priority
- GB 0001715 W 20000505
- GB 9910448 A 19990507
Abstract (en)
[origin: WO0068936A1] System for cancellation of non-stationary interfering signals, particularly for use for mitigating effects of such interferers produced by in-car entertainment (ECAD) devices for speech recognition applications. The system spectrally analyses signals output by the ECAD before and after they are passed through an in-car acoustic channel. A model of the acoustic channel is built by the system's algorithm. For speech recognition the model is spectrally subtracted from a signal received at a microphone in order to recover a wanted speech signal. The acoustic channel model is built by estimating frequency domain acoustic transfer functions between each loudspeaker used by the ECAD and the microphone.
IPC 1-7
IPC 8 full level
G10L 15/00 (2006.01); G10L 15/20 (2006.01); G10L 21/02 (2006.01); G10L 21/0208 (2013.01); H04R 3/02 (2006.01)
CPC (source: EP US)
G10K 11/175 (2013.01 - EP US); G10L 15/20 (2013.01 - EP); G10L 21/0208 (2013.01 - EP)
Citation (search report)
See references of WO 0068936A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 0068936 A1 20001116; AU 4590400 A 20001121; EP 1190417 A1 20020327; GB 9910448 D0 19990707; JP 2002544552 A 20021224
DOCDB simple family (application)
GB 0001715 W 20000505; AU 4590400 A 20000505; EP 00927504 A 20000505; GB 9910448 A 19990507; JP 2000617442 A 20000505