DocumentCode :
2684871
Title :
Blind detection of exclusive source activity periods in reverberant acoustic environments
Author :
Nickel, Robert M.
Author_Institution :
Dept. of Electr. Eng., Bucknell Univ., Lewisburg, PA
fYear :
2008
fDate :
21-23 July 2008
Firstpage :
377
Lastpage :
380
Abstract :
Blind separation and dereverberation of acoustic sources is still considered a very challenging task despite many years of research and the availability of increasingly powerful computation engines. The complexity of the task can be significantly reduced for sources that exhibit sufficiently long exclusive activity periods (EAPs). EAPs are time intervals during which only one source is active and all other sources are inactive (i.e. zero). During EAPs the estimation of the underlying system parameters simplifies from a MIMO type to a SIMO type. The existence of EAPs is not guaranteed for arbitrary signal classes. EAPs occur very frequently, however, in recordings of conversational speech. In this paper we propose a new low complexity method for EAP detection which significantly outperforms earlier approaches.
Keywords :
acoustic signal detection; blind source separation; parameter estimation; reverberation; EAP detection; MIMO type; SIMO type; acoustic sources; arbitrary signal classes; blind detection; blind separation; dereverberation; exclusive activity periods; exclusive source activity periods; low complexity method; reverberant acoustic environments; system parameter estimation; time intervals; Acoustic signal detection; Detectors; Independent component analysis; Loudspeakers; Microphone arrays; Nickel; Protection switching; Robustness; Speech; Transfer functions;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Sensor Array and Multichannel Signal Processing Workshop, 2008. SAM 2008. 5th IEEE
Conference_Location :
Darmstadt
Print_ISBN :
978-1-4244-2240-1
Electronic_ISBN :
978-1-4244-2241-8
Type :
conf
DOI :
10.1109/SAM.2008.4606894
Filename :
4606894
Link To Document :
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