Blind Beamforming Using Parallel Single-channel Speech Enhancers
Författare
Summary, in English
This paper presents an idea to extend a certain class of single channel speech enhancement algorithms to include the spatial domain. The resulting blind beamformer does not rely on a-priori knowledge of source and sensor positions and it enhances one or several speech sources based only on received data. The underlying principle in this approach is the fact that speech signals are short time stationary. Provided that the single channel speech enhancers attenuates unwanted sources and at the same time preserve the short time stationarity of speech signals, a summation of a small array of such single channel processors constitutes a coherent spatial speech enhancement. As opposed to traditional beamforming where the phase alteration is pre-specified, the phase alteration of the proposed structure is controlled by the received data. The evaluation uses a two microphone array and indicates that the signal to interference ratio is increased for a variety of source positions using the proposed method with only an insignificant decrease in speech quality
Publiceringsår
2006-06
Språk
Engelska
Sidor
123-126
Publikation/Tidskrift/Serie
Proceedings ELMAR 2006
Dokumenttyp
Konferensbidrag
Förlag
IEEE - Institute of Electrical and Electronics Engineers Inc.
Ämne
- Signal Processing
Conference name
ELMAR-2006
Conference date
2006-06-07 - 2006-06-09
Conference place
Zadar, Croatia
Status
Published
ISBN/ISSN/Övrigt
- ISBN: 953-7044-03-3