Phase-based speech enhancement

العناوين الأخرى

التحسين على الصوت باستخدام الطور

مقدم أطروحة جامعية

Shihadah, Bilal Abd al-Rauf Muhammad

مشرف أطروحة جامعية

al-Hanjuri, Muhammad Ahmad Muhammad

الجامعة

الجامعة الإسلامية

الكلية

كلية الهندسة

القسم الأكاديمي

قسم هندسة الحاسوب

دولة الجامعة

فلسطين (قطاع غزة)

الدرجة العلمية

ماجستير

الملخص الإنجليزي

Speech is a fundamental means of human communication.

Speech enhancement has been a challenge for many researchers for almost three decades.

The problem involves improving the performance of speech communication systems and improve the quality and intelligibility of degraded speech in noisy environments.

The majority of speech enhancement methods perform noise removal in spectral domain and construct the enhanced speech signal from the estimated magnitude of clean speech discarding the phase side of the noisy speech.

In this thesis,the researcher aims to show the effect of modifying the complex spectrum of enhancement process in the quality of the signal in term of perceptual evaluation of speech quality (PESQ).

The main job of this study is to show the importance of the complex value of wave atoms transform for enhancing the degraded signalswith minimum speech distortion.

The researcher use NOIZEUS dataset and PESQ measurement in comparison between techniques.This study use wave atoms transform as main enhancement technique combining it with other transformation techniques like Karhunen–Loeve transform and use different statistical probability model like maximum a posteriori, prior probability and posteriori probability with speech presence probability.

The result of the thesis shows that best enhancement achieved when use multi transformation technique with wave atoms.

This thesis reach 17.5% PESQ enhancement with combining wave atoms with KLT and prior probability uncertainty.

The proposed algorithms are implemented using MATLAB environment.

The results indicate that the proposed system improves the classical methods performance in terms of speech quality.

Keywords: PESQ, KLT, Wave Atoms, MAP, Prior probability, Posteriori probability, speech presence probability

التخصصات الرئيسية

الهندسة الكهربائية

عدد الصفحات

112

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-531455