Search
Now showing items 11-20 of 20
Phonetic segmentation: unsupervised approach
(Dhirubhai Ambani Institute of Information and Communication Technology, 2013)
Phonetic segmentation can find its potential application for Automatic Speech Recognition (ASR) and Text-to-Speech (TTS) Synthesis systems. In this thesis, we propose use of different spectral features viz., Mel Frequency ...
Representation theory in signal processing: some connections through gap
(Dhirubhai Ambani Institute of Information and Communication Technology, 2005)
This thesis is concerned with the study of some of the recent developments in the area of signal processing that arise from the connections of discrete transforms and their inherent symmetries with the representation theory ...
Vocal tract length normalization for automatic speech recognition
(Dhirubhai Ambani Institute of Information and Communication Technology, 2014)
Various factors affect the performance of Automatic Speech Recognition (ASR) systems. In this thesis, speaker differences due to variations in vocal tract length (VTL) are taken into account. Vocal Tract Length Normalization ...
Learn Graph Laplacian for Sparse Frequency Domain Representation
(Dhirubhai Ambani Institute of Information and Communication Technology, 2017)
"Learning of graph topology plays an important role in processing structure and unstructured data which can be represented as graph signals. Graph topology for a given graph signal is not always readily available from the ...
Architecture design for preliminary ECG analysis system using new DFT based analysis technique
(Dhirubhai Ambani Institute of Information and Communication Technology, 2007)
This thesis proposes a hardware architecture of an ASIC for a portable ECG analysis system. The device is meant to record and analyze ECG signals in real time so as to detect the presence of abnormalities. In order to ...
Multirate signal processing in digital communications
(Dhirubhai Ambani Institute of Information and Communication Technology, 2008)
Fundamentals of multirate signal processing and perfect reconstruction filter banks are revisited. An attempt is made to develop a good understanding of concepts by connecting the filter bank design issues to the concepts ...
High-speed 512-point FFT single-chip processor architecture
(Dhirubhai Ambani Institute of Information and Communication Technology, 2008)
This thesis present a fully parallel novel fixed point 16-bit word width 512 point FFT processor architecture. The 512 point FFT is realized by decomposing it into three 8 point FFT units. This approach reduces the number ...
Transmultiplexer design using different filters
(Dhirubhai Ambani Institute of Information and Communication Technology, 2010)
Transmultiplexer is one of the applications of Filter banks, which is used to transmit many signals simultaneously through a single channel and so that to separate at receiving end. Design of transmultiplexer using prototype ...
Oblique projection operator
(Dhirubhai Ambani Institute of Information and Communication Technology, 2010)
This thesis presents the understanding usefulness of Oblique Projector in signal processing like signal recovery, signal representation and reconstruction. This thesis also presents the different recursive oblique projector ...
Hardware implementation of multiband and multimode modem for software defined radio/ cognitive radio
(Dhirubhai Ambani Institute of Information and Communication Technology, 2011)
Present day programmable hardware and SDR (Software Defined Radio) have enabled radio processing to switch from analog to digital. The work presented here describes a method of designing a multiband & multimode modulator ...