Title :
Frequency-domain steering for negative beamformers in speech enhancement and directional source separation
Author :
Gómez, P. ; Álvarez, A. ; Martinez, R. ; Nieto, V. ; Rodellar, K.
Author_Institution :
Fac. de Inf., Univ. Politecnica de Madrid, Spain
Abstract :
Negative beamformers are well known for their high angular selectivity, which makes them suitable for speech enhancement and directional source separation. A limitation to the applicability of negative beamformers is the steering problem. A new technique for scanning the whole frequency range of interest is shown based on a nonlinear mapping function from angular positions to steering factors. The effects of this technique in treating narrow- and broad-band sources are studied
Keywords :
array signal processing; speech enhancement; tracking; broadband sources; directional source separation; frequency range scanning; frequency-domain steering; high angular selectivity; narrowband sources; negative beamformers; nonlinear mapping function; speech enhancement; wideband signal tracking; Electronic mail; Frequency; Loudspeakers; Microphone arrays; Source separation; Speech enhancement; Speech processing; Speech recognition; Transfer functions; User interfaces;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921064
