Repository logo
Collections
Browse
Statistics
  • English
  • हिंदी
Log In
New user? Click here to register.Have you forgotten your password?
  1. Home
  2. Theses and Dissertations
  3. M Tech Dissertations
  4. Phase-based Technique for Signal Reconstruction and Its Applications in Speech Processing

Phase-based Technique for Signal Reconstruction and Its Applications in Speech Processing

Files

201511054.pdf (1.62 MB)

Date

2017

Authors

Tak, Rishabh

Journal Title

Journal ISSN

Volume Title

Publisher

Dhirubhai Ambani Institute of Information and Communication Technology

Abstract

The problem of retrieving the phase of the signal from the magnitude of its Fourier transform is called as phase retrieval. There are several methods for signal reconstruction that have their own merits and demerits. In this thesis, we exploit the idea of encoding of the phase in the magnitude spectrum of the signal using cepstral processing. Using the concept of phase encoding, we propose a new algorithm for signal reconstruction. In particular, we consider the odd-even decomposition. We propose the shifting of the real part of the DTFT of signal (shifting in the frequency-domain) and make it non-negative. Using the proposed method, we try to improve the quality of the reconstructed signal. In addition, another significant contribution of this thesis is, we propose novel spectral features called as phase-encoded Mel cepstral coefficients (PEMCC). These features are used for spoofed speech detection (SSD) as well as automatic speaker verification (ASV) using the I-vector-based system. When the proposed feature set is fused with state-of-the-art MFCC (Mel frequency cepstral coefficients) feature set, it significantly reduces the equal error rate (EER) compared to the MFCC alone. This indicates the proposed feature captures the complementary information than the MFCC alone for both the applications consider in this thesis work.

Description

Keywords

Phase retrieval, Signal Reconstruction technique, Automatic speaker verification

Citation

Rishabh Tak(2017).Phase-based Technique for Signal Reconstruction and Its Applications in Speech Processing.Dhirubhai Ambani Institute of Information and Communication Technology.x, 44 p.(Acc.No: T00659)

URI

http://ir.daiict.ac.in/handle/123456789/695

Collections

M Tech Dissertations

Endorsement

Review

Supplemented By

Referenced By

Full item page
 
Quick Links
  • Home
  • Search
  • Research Overview
  • About
Contact

DAU, Gandhinagar, India

library@dau.ac.in

+91 0796-8261-578

Follow Us

© 2025 Dhirubhai Ambani University
Designed by Library Team