Inlämning av Examensarbete / Submission of Thesis

Muhammad Awais MEE10:116, pp. 58. ING/School of Engineering, 2011.

The work

Författare / Author: Muhammad Awais
Titel / Title: Multichannel Wiener Filtering for Speech Enhancement in Modulation Domain
Abstrakt Abstract:

Normally speech signals are contaminated with noise and interference that reduces the intelligibility of speech during communication. In order to make speech signals e ective and useful, they need to be enhanced from the noisy speech signal.
In speech processing eld many speech enhancement techniques are developed and are providing very good results.
Multichannel microphone array is also one of the techniques used for speech enhancement, that provides better results than the single channel speech enhancement. Moreover, Wiener filtering is the most commonly used technique for multichannel microphone array for speech enhancement. The main focus of this thesis is to implement multichannel microphone array using Wiener filtering in the modulation domain system and also in the time domain system to enhance the speech.
Both are implemented successfully and validated e ectively by considering diff erent parameters, i,e; Signal to Noise Ratio (SNR), Signal to Noise Ratio Improvement (SNRI) and Mean Opinion Score (MOS). Both the systems are tested with one female and one male speech distorted with diff erent types of
noise at -5dB,0dB,5dB,10dB,15dB and 20dB SNR. The values are calculated for the diff erent number of subbands, as the main focus is on modulation domain system. It provided efficient results in terms of SNRI and MOS score.

Ämnesord / Subject: Signalbehandling - Signal Processing

Nyckelord / Keywords: Filterbank, Coherent Envelope Detection, Incoherent Envelope Detection, Modulation Domain, Multichannel Wiener Filtering

Publication info

Dokument id / Document id:
Program:/ Programme Magisterprogram i Elektroteknik / Master of Science in Electrical Engineering
Registreringsdatum / Date of registration: 01/24/2011
Uppsatstyp / Type of thesis: Masterarbete/Master's Thesis (120 credits)

Context

Handledare / Supervisor: Dr. Benny Sällberg
benny.sallberg@bth.se
Examinator / Examiner: Dr. Benny Sällberg
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: ING/School of Engineering

+46 455 38 50 00

Files & Access

Bifogad uppsats fil(er) / Files attached: thesis.pdf (1206 kB, öppnas i nytt fönster)