Essays about: "echo canceller"

Showing result 1 - 5 of 6 essays containing the words echo canceller.

  1. 1. Subband Adaptive Filtering Technique employing APA For Stereo Echo Cancellation over Audio Signals

    University essay from Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling

    Author : BHANUDURGA SRI SATYA SIMHA EDAMAKANTI; VISHNU CHAITANYA GUNDU; [2014]
    Keywords : Stereo Echo Cancellation; NLMS; RLS; MCHA; APA; Subband Adaptive Modeling.; Master of Science Programme in Electrical Engineering with emphasis on Signal Processing Masterprogram i Elektroteknik med inriktning mot signalbehandling;

    Abstract : The world today is relying on hands free devices and teleconferencing equipments but the major problem with the use of these systems is creation of acoustic echo at the time of conversation. The quality of information to be transmitted and received is degraded due to the echo. READ MORE

  3. 2. Methods and algorithms for quality and performance evaluation of audio conferencing systems

    University essay from Institutionen för fysik

    Author : Maria Palmqvist; [2013]
    Keywords : AEC; loudspeaker performance; audio conferencing systems; PESQ; MOS; THD; ERLE; CSD;

    Abstract : In an audio conferencing system the sound from the loudspeaker is undesirably picked up by the microphone. This introduces echoes to the system. To remove the echoes an acoustic echo canceller can be built with an adaptive filter. READ MORE

  4. 3. Speech Enhancement in Hands-Free Device (Hearing Aid) with emphasis on Elko's Beamformer

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : TELAGAREDDI S N U V RAMESH; [2012]
    Keywords : Speech Enhancement; Speech intelligibility; Speech Communication and Beamforming ;

    Abstract : In general, an uncontrolled environment may contain degradation components like background noise, speech from other speakers etc. along with required speech components. It is very tough to concentrate only on speech signals in presence of background noise for normal listeners and hearing impaired persons. READ MORE

  5. 4. Performance Analysis of Adaptive Algorithms based on different parameters Implemented for Acoustic Echo Cancellation in Speech Signals

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Swathi Kotte; [2011]
    Keywords : least mean square LMS Algorithm; Leaky Least mean square LLMS Algorithm; Normalized Least Mean Square NLMS Algorithm and Recursive Least Square RLS Algorithm ; additive white Gaussian noise ; Return Loss Enhancement ERLE ; signal to noise ratio;

    Abstract : Echo cancellation in voice communication is a process of removing the echo to improve the clarity, quality of the voice signals by suppressing the silence signal which prevents echoes during transmission through networks. There are two types of echo in voice communication: Hybrid echo cancellation and Acoustic echo cancellation. READ MORE

  6. 5. Evaluation of a Floating Point Acoustic Echo Canceller Implementation

    University essay from Institutionen för systemteknik

    Author : Anders Dahlberg; [2007]
    Keywords : AEC; DSP; Floating-point format; NLMS; Quantization;

    Abstract : This master thesis consists of implementation and evaluation of an AEC, Acoustic Echo Canceller, algorithm in a floating-point architecture. The most important question this thesis will try to answer is to determine benefits or drawbacks of using a floating-point architecture, relative a fixed-point architecture, to do AEC. READ MORE