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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 ...
All-digital delay-line based ultra wide band transmitter architecture in 0.18m CMOS
(Dhirubhai Ambani Institute of Information and Communication Technology, 2014)
Ultra-Wide Band (UWB) technology has recently become a viable option for commercial wireless applications that require high data-rate and ultra low power demand. UWB technology operates between the frequency range of 3.1 ...
Estimating depth from monocular video under varying illumination
(Dhirubhai Ambani Institute of Information and Communication Technology, 2014)
Ability to perceive depth and reconstruct 3D surface of an image is a basic function of many areas of computer vision. Since 2D image is the projection of 3D scene in two dimension, the information about depth is lost. ...
Estimating depth in a single image by learning through neural networks
(Dhirubhai Ambani Institute of Information and Communication Technology, 2014)
Depth information extraction from images is a vibrant problem in computer vision. Features from the image like: haze, texture gradient and texture variation could give depth-related knowledge. Typically, input features are ...
Image compression using DCT and compressive sensing (CS) theory
(Dhirubhai Ambani Institute of Information and Communication Technology, 2014)
Data compression is a method of storing the same information with less data or space. There are many techniques available for compressing the image data resulting in reduced storage space. Minimizing storage space minimizes ...
Novel approaches for spectral unmixing of hyperspectral data
(Dhirubhai Ambani Institute of Information and Communication Technology, 2014)
This thesis addresses the problem of spectral unmixing of remotely sensed hyperspectral data. The spectral unmixing has the objective of quantifying the reectance properties of di_erent materials on the earth. Complete ...
Design and analysis of novel receiver front-end sub-systems in Ku-band for satellite applications
(Dhirubhai Ambani Institute of Information and Communication Technology, 2014)
A novel receiver front-end; Low Noise Amplifier (LNA), mixer and Local Oscillator (LO); is designed and analyzed in Ku-band. Different design aspects of the subsystems along with the trade-offs and improvements are presented. ...
Detection of tampering in digital images using feature based hash generation
(Dhirubhai Ambani Institute of Information and Communication Technology, 2014)
Recent years have witnessed an exponential growth in the use of digital images due to development of high quality digital cameras and multimedia technology. Easy availability of user-friendly image editing software has ...
Physical layer security: secrecy capacity analysis for multiuser networks using joint SVD-GSVD precoding technique
(Dhirubhai Ambani Institute of Information and Communication Technology, 2014)
In this thesis, the problem of Physical Layer (PHY) Security is considered. This problem deals with secure signal transmission for a Multiple-Input Multiple-Output (MIMO) system using a relay i.e. the signal is transmitted ...
Ontology development and query execution for an agro-advisory system
(Dhirubhai Ambani Institute of Information and Communication Technology, 2014)
In agriculture domain, farmers have queries regarding crop, soil, climate, cultivation process, disease, and pest. They express their queries in a natural language which are usually answered by agriculture experts. Due to ...