EP 1211671 A3 20030910 - Automatic gain control with noise suppression
Title (en)
Automatic gain control with noise suppression
Title (de)
Automatische Verstärkungsregelung mit Rauschunterdrückung
Title (fr)
Commande automatique de gain avec suppression de bruit
Publication
Application
Priority
US 24938800 P 20001116
Abstract (en)
[origin: EP1211671A2] Audio processing apparatus (40) includes a a noise suppression stage (42), which applids a variable level of noise suppression to an input audio signal, so as to generate a noise-suppressed signal, and an automatic gain control (AGC) stage (44), coupled to apply a variable gain to the noise-suppressed signal, responsive to a level of the signal. A noise controller (46) receives an indication of the gain from the AGC stage and determines the level of noise suppression to be applied by the noise suppression stage responsive to the gain. <IMAGE>
IPC 1-7
IPC 8 full level
G10L 21/0208 (2013.01)
CPC (source: EP)
G10L 21/0208 (2013.01)
Citation (search report)
- [A] US 4630305 A 19861216 - BORTH DAVID E [US], et al
- [A] US 4658426 A 19870414 - CHABRIES DOUGLAS M [US], et al
- [DA] BOLL S F: "SUPPRESSION OF ACOUSTIC NOISE IN SPEECH USING SPECTRAL SUBTRACTION", IEEE TRANSACTIONS ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING, IEEE INC. NEW YORK, US, vol. ASSP-27, no. 2, 1 April 1979 (1979-04-01), pages 113 - 120, XP002072967, ISSN: 0096-3518
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)
DOCDB simple family (application)
EP 01309636 A 20011115