EP 1287521 A4 20051116 - PERCEPTUAL SPECTRAL WEIGHTING OF FREQUENCY BANDS FOR ADAPTIVE NOISE CANCELLATION
Title (en)
PERCEPTUAL SPECTRAL WEIGHTING OF FREQUENCY BANDS FOR ADAPTIVE NOISE CANCELLATION
Title (de)
WAHRNEHMUNGSBEZOGENE SPEKTRALE GEWICHTUNG VON FREQUENZBÄNDERN FÜR DIE ADAPTIVE RAUSCHLÖSCHUNG
Title (fr)
PONDERATION SPECTRALE PERCEPTIVE DE BANDES DE FREQUENCE POUR UNE SUPPRESSION ADAPTATIVE DU BRUIT
Publication
Application
Priority
- US 0106888 W 20010302
- US 53781400 A 20000328
Abstract (en)
[origin: WO0173759A1] A communication system for processing a communication signal derived from speech and noise enhances the quality of the communication signal by providing a filter (50) dividing the communication signal into a plurality of frequency band signals representing the communication signal in a plurality of frequency bands. A calculator generates a likelihood signal having values representing the likelihoods that the communication signal is derived from speech (70). The calculator assigns weighting values (120) to the frequency band signals in response to the values of the likelihood signal. The calculator also alters the frequency band signals in response to the weighting values to generate weighted frequency band signals, and combines (160) the weighted frequency bands signals to generate a communication signal with enhanced quality (170).
IPC 1-7
IPC 8 full level
G10L 21/02 (2006.01); G10L 21/0208 (2013.01); G10L 19/02 (2006.01); G10L 21/0232 (2013.01); G10L 21/0264 (2013.01)
CPC (source: EP)
G10L 21/0208 (2013.01); G10L 19/0204 (2013.01); G10L 21/0232 (2013.01); G10L 21/0264 (2013.01)
Citation (search report)
- [Y] US 5806025 A 19980908 - VIS MARVIN L [US], et al
- [Y] US 5812970 A 19980922 - CHAN JOSEPH [JP], et al
- [Y] US 5757937 A 19980526 - ITOH KENZO [JP], et al
- [Y] US 4630305 A 19861216 - BORTH DAVID E [US], et al
- [A] US 5768473 A 19980616 - EATWELL GRAHAM P [CA], et al
- [XY] YANG J ED - INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS: "Frequency domain noise suppression approaches in mobile telephone systems", STATISTICAL SIGNAL AND ARRAY PROCESSING. MINNEAPOLIS, APR. 27 - 30, 1993, PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING (ICASSP), NEW YORK, IEEE, US, vol. VOL. 4, 27 April 1993 (1993-04-27), pages 363 - 366, XP010110469, ISBN: 0-7803-0946-4
- [DA] MCAULAY R J ET AL: "SPEECH ENHANCEMENT USING A SOFT-DECISION NOISE SUPPRESSION FILTER", IEEE TRANSACTIONS ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING, IEEE INC. NEW YORK, US, vol. ASSP-28, no. 2, 1 April 1980 (1980-04-01), pages 137 - 145, XP000647165, ISSN: 0096-3518
- See references of WO 0173759A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0173759 A1 20011004; AU 4541801 A 20011008; CA 2401672 A1 20011004; EP 1287521 A1 20030305; EP 1287521 A4 20051116
DOCDB simple family (application)
US 0106888 W 20010302; AU 4541801 A 20010302; CA 2401672 A 20010302; EP 01918328 A 20010302