Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 128 for “"DCT"”.
-
DCT Enabled smart consumer Grid Model
… this goal, we proposed the DC Transformer (DCT) enabled consumer grid model. The DC Transformer has been regarded as one of the most emerging technologies and it has many advantages over the convectional low frequency AC transformers such as high power density in small area, voltage …
-
Comparison of data hiding using LSB and DCT for image
… technique and hiding in frequency domain using DCT technique. Various BMP cover images with 256x256 and 512x512 resolutions for LSB and DCT techniques are used in the experimentations. For DCT technique, various BMP image is converted to JPEG image. Then data is hidden into the JPEG cover image …
-
Hybrid DWT-DCT algorithm for image and video compression applications
… for data compression. Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT) are the most commonly used transformation. DCT has high energy compaction property and requires less computational resources. On the other hand, DWT is multiresolution transformation. In this work, we …
-
Assessing the benefits of DCT compressive sensing for computational electromagnetics
… is known as the discrete cosine transform (DCT) method. Using the DCT algorithm, I have developed a compressive sensing software implementation. Through the course of my research I have tested both the accuracy and runtime efficiency of this software implementation proving its potential for …
-
A study of probability distributions of DCT coefficients in JPEG compression
The Discrete Cosine Transform (DCT) used in JPEG compression has shown excellent energy compaction properties that rival that of the ideal Karhunen-Loeve Transform. Lossy compression in JPEG is achieved by distorting 8x8 block DCT coefficients through quantization. It has been shown in literature …
-
A comparative study of DCT, LOT, and DWT-based image coders
Thesis (M.Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
-
Design and evaluation of a data-dependent low-power 8x8 DCT/IDCT
Traditional fast Discrete Cosine Transform (DCT)/ Inverse DCT (IDCT) algorithms have focused on reducing arithmetic complexity and have fixed run-time complexities regardless of the input. Recently, data-dependent signal processing has been applied to the DCT/IDCT. These algorithms have variable …
-
Digital Hardware Architectures for Exact and Approximate DCT Computation Using Number Theoretic Techniques
The discrete cosine transform (DCT) is a key tool in many image and video coding applications. Therefore significant effort is been made to realize DCT computation utilizing minimum resources in terms of hardware, at acceptable accuracy. This thesis explores the use of number theoretic techniques …
-
On the Low Power Design of DCT and IDCT for Low Bit Rate Video Codecs
… in H.263 are the Discrete Cosine Transform (DCT) and the Inverse Discrete Cosine Transform (IDCT), which perform spatial compression and decompression of the data. In an ASIC implementation of H.263, the high computational complexity of the DCT and IDCT leads to high power dissipation of the …
-
A comparison of discrete cosine transform and discrete wavelet transform algorithm in watermarking against common attacks
… done between Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT). In this report, the DCT watermarking algorithms and DWT watermarking algorithms were compared based on robustness and imperceptibility criteria. With DCT, the watermark bits were embedded into the mid-band …
-
Digital Communication Technologies in Romantic Relationships
… the use of ‘Digital Communication Technology’ (DCT) devices within committed monogamous romantic relationships through the analysis of forty-five semi-structured interviews. I argue that too often contemporary researchers are taking sides that the manner in which mobile devices and applications …
-
The disability cash transfer as a means of poverty reduction at Nqutu Local Municipality
… with disabilities: The Disability Cash Transfer (DCT). Physical and mental conditions of people with disabilities vary from one person to another, which means that the type of care they require as they grow older is also different. Therefore, people with disabilities constantly require financial …
-
2010 A Digital Odyssey: Exploring Document Camera Technology and Computer Self-Efficacy in a Digital Era
… with the advent of Document Camera Technology (DCT). This study explores the pedagogical implications of implementing DCT; to see if there is a relationship between teachers’ comfort with DCT and to the self-efficacy beliefs of teachers. The literature describes our educational system “at risk,” …
-
An experimental test of dual coding theory using various media and visual momentum in a multimedia environment
… based on a model of dual-coding theory (DCT) and on an engineering design principle named visual momentum. DCT is a general cognitive information processing theory. Under DCT, external stimuli are represented in either the verbal or nonverbal symbolic systems. The verbal system is …
-
Prediction Models for Multi-dimensional Power-Performance Optimization on Many Cores
… (DVFS) and dynamic concurrency throttling (DCT) are two software tools (or knobs) for reducing the dynamic power consumption of HPC systems. To date, few works have considered the synergistic integration of DVFS and DCT in performance-constrained systems, and, to the best of our knowledge, …
-
Method and scope in cross-cultural speech act research: A contrastive study of requests in Japanese and English
… these issues, a discourse completion test (DCT) and a multiple choice questionnaire (MCQ) were administered to speakers Japanese and English. The DCT showed Japanese to be more direct than Americans. There were also significant differences between the DCT and MCQ results for both languages. …
-
Mass Spectrometric Analysis of Tyrosine Metabolic Enzymes
… know very little about. Dopachrome tautomerase (DCT), dopachrome conversion enzyme (DCE) and α-methyldopa resistant protein (AMD) fall into the category of the less characterized enzymes. Dopachrome is a pivotal intermediate in melanogenesis. Mammalian DCT and insect DCE both use dopachrome as a …
-
Low power data-dependent transform video and still image coding
… Algorithms for the Discrete Cosine Transform (DCT) and its inverse are introduced which exploit statistical properties of the input data in both the space and spatial frequency domains in order to minimize the total number of arithmetic operations. Two VLSI chips have been built as a …
-
Estimation of channelized features in geological media using sparsity constraint
… by a subset of a discrete cosine transform (DCT) basis containing low-frequency elements. The methodology is related to compressive sensing, which is a recently introduced paradigm for estimation and perfect reconstruction of sparse signals from partial linear observations in an incoherent …
Page 1 of 7