A Perspective on Stereophonic Acoustic Echo Cancellation: [Electronic resource] / by Jacob Benesty, Constantin Paleologu, Tomas Gansler, Silviu Ciochina
Tipo de material: TextoSeries Springer Topics in Signal Processing; -4Descripción: VI, 142 p.: 62 illus. in colorISBN: 9783642225741 99783642225741Tema(s): ENGINEERING | USER INTERFACES AND HUMAN COMPUTER INTERACTION | SIGNAL, IMAGE AND SPEECH PROCESSING | FOURIER ANALYSIS | FOURIER ANALYSIS | COMPUTER SCIENCEClasificación CDD: 621.382 Recursos en línea: ir a documentoTipo de ítem | Ubicación actual | Colección | Signatura | Info Vol | Copia número | Estado | Fecha de vencimiento | Código de barras | Reserva de ítems |
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DOCUMENTOS DIGITALES | Biblioteca Jorge Álvarez Lleras | Digital | 621.382 223 (Navegar estantería) | Ej. 1 | 1 | Disponible | D000799 |
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621.382 223 Robust Speech Recognition of Uncertain or Missing Data | 621.382 223 Synchronization Techniques for Chaotic Communication Systems | 621.382 223 Network Reliability and Resilience | 621.382 223 A Perspective on Stereophonic Acoustic Echo Cancellation: | 621.382 223 Trustworthy Internet | 621.382 223 Architecture and Design for the Future Internet | 621.382 223 Algorithm-Architecture Matching for Signal and Image Processing |
Introduction -- Problem Formulation -- System Identification with the Wiener Filter -- A Class of Stochastic Adaptive Filters -- A Class of Affine Projection Algorithms -- Recursive Least-Squares Algorithms -- Double-Talk Detection -- Echo and Noise Suppression as a Binaural Noise Reduction Problem -- Experimental Study.
Single-channel hands-free teleconferencing systems are becoming popular. In order to enhance the communication quality of these systems, more and more stereophonic sound devices with two loudspeakers and two microphones are deployed. Because of the coupling between loudspeakers and microphones, there may be strong echoes, which make real-time communication very difficult. The best way we know to cancel these echoes is via a stereo acoustic echo canceller (SAEC), which can be modelled as a two-input/two-output system with real random variables. In this work, the authors recast this problem into a single-input/single-output system with complex random variables thanks to the widely linear model. From this new convenient formulation, they re-derive the most important aspects of a SAEC, including identification of the echo paths with adaptive filters, double-talk detection, and suppression.
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