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Dissertations / Theses on the topic 'Optimal coding'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Newton, David Ellis. "Optimal ternary linear codes." Thesis, University of Salford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292863.

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2

Jones, Christopher Martin. "Optimal ternary linear codes." Thesis, University of Salford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366000.

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3

McColl, Roderick William. "Colour image quantisation and coding for optimal perception." Thesis, University of Warwick, 1991. http://wrap.warwick.ac.uk/73515/.

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Once a digital image is processed in some way and the reconstruction is compared to the original, the final arbiter of reconstruction quality is the human to whom the images are presented. The research presented here is concerned with the development of schemes for the quantisation of colour images and for the encoding of colour images for transmission, with the goal of minimising the perceived image distortion rather than minimising a traditional error signal statistic. In order to quantise colour images with minimum perceived distortion, a colour space is sought in which Euclidean distances

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4

Abdulwahid, Khalid. "Optimal decoding for line codes." Thesis, University of Essex, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253980.

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5

Ni, Pengpeng. "Towards Optimal Quality of Experience via Scalable Video Coding." Licentiate thesis, Västerås : School of Innovation, Design and Engineering, Mälardalen University, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-7421.

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6

Greenough, Philip Peter. "Optimal linear codes over GF(3) and GF(4)." Thesis, University of Salford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238848.

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7

Kim, Hyungjoon. "Low-Complexity Mode Selection for Rate-Distortion Optimal Video Coding." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14513.

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The primary objective of this thesis is to provide a low-complexity rate-distortion optimal coding mode selection method in digital video encoding. To achieve optimal compression efficiency in the rate-distortion framework with low computational complexity, we first propose a rate-distortion model and then apply it to the coding mode selection problem. The computational complexity of the proposed method is very low compared to overall encoder complexity because the proposed method uses simple image properties such as variance that can be obtained easily. Also, the proposed method gives signifi

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8

Борисенко, Олексій Андрійович, Алексей Андреевич Борисенко, Oleksii Andriiovych Borysenko, Світлана Михайлівна Маценко, Светлана Михайловна Маценко та Svitlana Mykhailivna Matsenko. "Оптимальное кодирование информации на основе неравномерных биноминальных кодов". Thesis, Сумський державний університет, 2011. http://essuir.sumdu.edu.ua/handle/123456789/14570.

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9

Gangammanavar, Harshavardhana J. "OPTIMAL CODING AND SCHEDULING TECHNIQUES FOR BROADCASTING DEADLINE CONSTRAINT TRAFFIC OVER UNRELIABLE WIRELESS CHANNELS." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1262111942.

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10

Li, Hongxing, and 李宏兴. "Optimal data dissemination in stochastic and arbitrary wireless networks." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B4832971X.

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Data dissemination among wireless devices is an essential application in wireless networks. In contrast to its wired counterparts which have more stable network settings, wireless networks are subject to network dynamics, such as variable network topology, channel availability and capacity, which are due to user mobility, signal collision, random channel fading and scattering, etc. Network dynamics complicate the protocol design for optimal data disseminations. Although the topic has been intensively discussed for many years, existing solutions are still not completely satisfactory, especiall

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11

Bao, Lei. "Source-channel coding for closed-loop control." Licentiate thesis, Stockholm, Communication Theory Lab, School of Electrical Engineering, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3980.

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12

Kunze, Susemihl Alex [Verfasser], Manfred [Akademischer Betreuer] Opper, Klaus [Akademischer Betreuer] Obermayer, Ron [Akademischer Betreuer] Meir, and Jakob [Akademischer Betreuer] Macke. "Optimal population coding of dynamic stimuli / Alex Kunze Susemihl. Gutachter: Klaus Obermayer ; Ron Meir ; Jakob Macke ; Manfred Opper. Betreuer: Manfred Opper." Berlin : Technische Universität Berlin, 2015. http://d-nb.info/1071889893/34.

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13

Cai, Jianfei. "Robust error control and optimal bit allocation for image and video transmission over wireless channels /." free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3052158.

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14

Thie, Johnson Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Optimal erasure protection assignment for scalably compressed data over packet-based networks." Awarded by:University of New South Wales. Electrical Engineering and Telecommunications, 2004. http://handle.unsw.edu.au/1959.4/19373.

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This research is concerned with the reliable delivery of scalable compressed data over lossy communication channels. Recent works proposed several strategies for assigning optimal code redundancies to elements of scalable data, which form a linear structure of dependency, under the assumption that all source elements are encoded onto a common group of network packets. Given large data and small network packets, such schemes require very long channel codes with high computational complexity. In networks with high loss, small packets are more desirable than long packets. The first contributio

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15

Ozadam, Hakan. "Repeated-root Cyclic Codes And Matrix Product Codes." Phd thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615304/index.pdf.

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We study the Hamming distance and the structure of repeated-root cyclic codes, and their generalizations to constacyclic and polycyclic codes, over finite fields and Galois rings. We develop a method to compute the Hamming distance of these codes. Our computation gives the Hamming distance of constacyclic codes of length $np^s$ in many cases. In particular, we determine the Hamming distance of all constacyclic, and therefore cyclic and negacyclic, codes of lengths p^s and 2p^s over a finite field of characteristic $p$. It turns out that the generating sets for the ambient space obtained by tor

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16

Mansouri, Rad Mohammad. "Passive Optical Network (POM) Monitoring using Optical Coding Technology." Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/26923/26923.pdf.

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17

Rad, Mohammad M. "Passive optical network (PON) monitoring using optical coding technology." Doctoral thesis, Université Laval, 2010. http://hdl.handle.net/20.500.11794/21923.

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Les réseaux optiques passifs (PON) semblent être la technologie gagnante et ultime du futur pour les "fibres jusqu'au domicile" ayant une haute capacité. L'écoute de contrôle de ce genre de système est nécessaire pour s'assurer un niveau de qualité de service prédéterminé pour chaque client. En outre, l'écoute de contrôle réduit considérablement les dépenses en capital et de fonctionnement (CAPEX et OPEX), tant pour le fournisseur du réseau que les clients. Alors que la capacité des PON est croissante, les gestionnaires de réseau ne disposent pas encore d'une technologie efficace et appropriée

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18

Lundqvist, Henrik. "Error Correction Coding for Optical CDMA." Licentiate thesis, KTH, Microelectronics and Information Technology, IMIT, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1637.

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<p>The optical fiber is a very attractive communication mediumsince it offers a large bandwidth and low attenuation and cantherefore facilitate demanding services such as high-qualityvideo transmission. As the reach of optical fiber is beingextended to the access network it is economically attractive toshare fibers between different users without adding activecomponents in the network. The most common multiple accessmethod for such passive optical networks is time divisionmultiple access (TDMA), but lately there has been an increasedinterest in using wavelength division multiple access (WDMA)a

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19

Roberts, Guy Frank. "Wavelength coding for SOA switched optical interconnects." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613348.

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20

Anane, Rajoua. "Contribution à l'optimisation conjointe PHY/MAC dans les réseaux de capteurs sans fil." Thesis, Le Mans, 2016. http://www.theses.fr/2016LEMA1015/document.

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Les recherches sur ce sujet se base sur la prise de conscience qu’il est possible de réaliser des équipements de très petite taille pouvant être exploité dans des différents domaines comme : l’habitat intelligent, surveillance et sécurité, les applications médicales, gestion d’une exploitation agricole, etc.Contrairement aux réseaux traditionnels qui se concentrent essentiellement à fournir une meilleure qualité de service (QoS), les RCSFs doivent, en plus, se préoccuper à conserver au mieux l’énergie dans le réseau.En effet, ils doivent adopter des techniques qui permettent aux utilisateurs d

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21

Vu, Xuan Thang. "Joint Network / Channel Decoding over Noisy Wireless Networks." Phd thesis, Université Paris Sud - Paris XI, 2014. http://tel.archives-ouvertes.fr/tel-01060330.

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Network coding (NC) has gained much research attention as a potential candidate to solve the demand for higher spectral e ciency of modern wireless communications. Many research papers have investigated the performance of NC-aided networks such as throughput and outage capacity. However, the analysis of NC in practical systems where NC is combined with other techniques such as channel coding is still immature to fully understand its potential performance. In this thesis, we aim to design high performance receivers and analyze its performance for network-coded cooperative networks in practical

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22

Kuo, Eric Heng-Shiang 1978. "Assist channel coding for improving optical character recognition." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/86453.

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Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.<br>Includes bibliographical references (p. 50).<br>by Eric Heng-Shiang Kuo.<br>S.B.and M.Eng.

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23

Leong, Miu Yoong. "Coherent Optical Transmission Systems : Performance and Coding Aspects." Doctoral thesis, KTH, Optik och Fotonik, OFO, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-176637.

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Since the invention of fiber-optic systems in the 1970s, user demand has driven innovation forward, and each new generation of products has achieved higher data rates than its predecessor. Today, the most promising approach for further increasing data rates is coherent transmission with multi-level modulation and digital signal processing (DSP). By using multi-level modulation, data rates can be increased without increasing the spectral bandwidth of the signal. Digital signal processing has a highly-predictable design flow, and solutions are likely to become more attractive in the future as te

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24

Davison, Alan Stephen. "All-optical signal processing devices." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316729.

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25

Moinian, Abdolhosein. "Signal processing and coding for two-dimensional optical storage." Thesis, Lancaster University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440397.

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26

Amhoud, El Mehdi. "Coding techniques for space-division multiplexed optical fiber systems." Electronic Thesis or Diss., Paris, ENST, 2017. http://www.theses.fr/2017ENST0067.

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Les deux dernières décennies ont connu une croissance exponentielle de la demande pour plus de capacité dans les réseaux optiques. Cette croissance a été principalement causée par le développement d'Internet et le trafic croissant généré par le nombre croissant des utilisateurs. La fibre optique offre plusieurs degrés de liberté pour augmenter la capacité. La fréquence, le temps, la phase, la polarisation ont déjà été utilisés pour satisfaire la demande de bande passante, ainsi le multiplexage spatial (SDM) reste le seul degré de liberté disponible pouvant être utilisé dans les systèmes optiqu

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27

Hwang, Eui-Sik. "Direct detection and coherent optical systems employing error-correcting coding." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA284350.

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Thesis (M.S. in Engineering Acoustics) Naval Postgraduate School, June 1994.<br>Thesis advisor(s): Tri T. Ha ; Randy L. Borchardt. "June 1994." Includes bibliographical references. Also available online.

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28

Auli, Øystein Ødegaard. "Wavelet based Video coding with optical flow for motion compensation." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-14175.

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In broadcasting environments intra-only video coding with JPEG 2000 has shownto provide many desired features along with high picture quality. However, thereis no exploitation of temporal redundancy, which can reduce the bit rate whilemaintaining the quality.Optical flow algorithms are designed to find the apparent movement of brightness inan image, and can be used to estimate the motion of each pixel between consecutiveimages. This thesis explores the performance of a hybrid video codec that uses theClassic+NL optical flow algorithm for motion compensation and JPEG 2000for encodin

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29

Supnithi, Pornchai. "Coding and signal processing in M-ary optical recording systems." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/13440.

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30

McPheters, Laura L. "Concatenated coding and iterative decoding for magnetic and optical recording." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/16018.

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31

Leong, Miu Yoong. "DSP-based Coherent Optical Systems : Receiver Sensitivity and Coding Aspects." Licentiate thesis, KTH, Material- och nanofysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-166400.

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User demand for faster access to more data is at a historic high and rising. One of the enabling technologies that makes the information age possible is fiber-optic communications, where light is used to carry information from one place to another over optical fiber. Since the technology was first shown to be feasible in the 1970s, it has been constantly evolving with each new generation of fiber-optic systems achieving higher data rates than its predecessor. Today, the most promising approach for further increasing data rates is digital signal processing (DSP)-based coherent optical transmiss

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32

Haas, Shane M. (Shane Martin) 1975. "Capacity of and coding for multiple-aperture, wireless, optical communications." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/16946.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.<br>Includes bibliographical references (p. 243-249).<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Refractive index turbulence causes random power fluctuations in optical communication systems, making communication through the atmosphere difficult. This same phenomenon makes the stars twinkle at night, and pavement shimmer on a hot summer day. True to the old adage, "don't p

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33

Abu, Almaalie Zina. "Free space optical wireless communication with physical layer network coding." Thesis, Northumbria University, 2016. http://nrl.northumbria.ac.uk/32546/.

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Terrestrial free-space optical (FSO) communications is an emerging low-cost, licensefree and high-bandwidth access solution for a number of applications including the “last mile” access network. However, for a transmission range from a few meter to longer than 1 km, a number of atmospheric phenomena, such as rain, haze, fog, snow, scintillation and pointing errors become a major performance limiting factors in FSO systems resulting in link deterioration and ultimately complete link failure. Relay-assisted technique is capable of mitigating the signal fading and maintain acceptable performance

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34

Ivkovic, Milos. "Characterization and Coding Techniques for Long-Haul Optical Telecommunication Systems." Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/196150.

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This dissertation is a study of error in long haul optical fiber systems and how to coupe with them. First we characterize error events occurring during transmission, then we determine lower bounds on information capacity (achievable information rates) and at the end we propose coding schemes for these systems.Existing approaches for obtaining probability density functions (PDFs) for pulse energy in long-haul optical fiber transmission systems rely on numerical simulations or analytical approximations. Numerical simulations make far tails of the PDFs difficult to obtain, while existing ana

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35

Yee, Tze-Sung. "A hardware based optical digital code scanning system." Ohio : Ohio University, 1988. http://www.ohiolink.edu/etd/view.cgi?ohiou1182536210.

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36

Chaudhry, Mohammed Sabih. "Microwave I.F signal processing strategies for coherent optical communications." Thesis, Bangor University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357247.

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37

Quist, Stig Nygaard. "MPLS controlled deflection routing for packet switched optical networks." Thesis, University of Strathclyde, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273344.

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38

Irman, Martin. "Rapid system prototyping for error-control coding in optical CDMA networks." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=98972.

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With increasing bandwidth requirements of individual users, fibre-to-the-home systems are promising candidates for last mile communication. In case of local area networks, optical CDMA with nonorthogonal spreading sequences has emerged as an attractive technology that can manage quickly varying user requirements, while enabling total bandwidth utilization, avoiding network congestion and preventing denial of service. However, powerful error-control codes have to be utilized within optical CDMA systems to prevent errors caused by multiuser interference. Due to data rates common in optical commu

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39

Wang, Wei. "Alignement pratique de structure-séquence d'ARN avec pseudonœuds." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS563/document.

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Aligner des macromolécules telles que des protéines, des ADN et des ARN afin de révéler ou exploiter, leur homologie fonctionnelle est un défi classique en bioinformatique, qui offre de nombreuses applications, notamment dans la modélisation de structures et l'annotation des génomes. Un certain nombre d'algorithmes et d'outils ont été proposés pour le problème d'alignement structure-séquence d'ARN. Cependant, en ce qui concerne les ARN complexes, comportant des pseudo-noeuds, des interactions multiples et des paires de bases non canoniques, de tels outils sont rarement utilisés dans la pratiqu

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40

Chih, Samuel C. M. "Error detection capability and coding schemes for fiber optic communication." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/14854.

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41

Gong, Yun. "On semidefinite programming and vector quantization with application to image coding." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/14876.

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42

Datta, Suparna. "New results on coding for M-ary runlength-limited channels." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/33426.

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Licona-Nunez, Jorge Estuardo. "M-ary Runlength Limited Coding and Signal Processing for Optical Data Storage." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5195.

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Recent attempts to increase the capacity of the compact disc (CD) and digital versatile disc (DVD) have explored the use of multilevel recording instead of binary recording. Systems that achieve an increase in capacity of about three times that of conventional CD have been proposed for production. Marks in these systems are multilevel and fixed-length as opposed to binary and variable length in CD and DVD. The main objective of this work is to evaluate the performance of multilevel ($M$-ary) runlength-limited (RLL) coded sequences in optical data storage. First, the waterfilling capacity of

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Legg, Peter Jonathon. "The impact of interferometric noise on the performance of optical communication networks." Thesis, University of Strathclyde, 1995. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21336.

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Interferometric noise, arising on the interference of data and parasitic crosstalk and common to many current and proposed fibre optic communication networks, may induce unacceptable power penalties and bit-error-rate floors. This work addresses key aspects of this problem via experiment and theoretical analysis: the origin and characteristics of the noise, the resultant performance degradation of optical networks, and solution paths. The study of a single crosstalk interferer generates a classification of all interferometric noise forms and reveals the key properties of probability density fu

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Peden, John F. "Analysis of codon usage." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311834.

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46

Ghosna, Fadi Jawdat. "Pulse position modulation coding schemes for optical inter-satellite links in free space." Thesis, University of Huddersfield, 2010. http://eprints.hud.ac.uk/id/eprint/8766/.

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The rapid and significant development of communications links between satellites has made it possible to use various applications such as relay voice, video, multimedia, etc. As a result, a great deal of research has been done in this field during the last few years to reduce power consumption and increase transmission reliability. This thesis is concerned with an analysis of intersatellite links in free space, with optical links using laser sources being considered in particular. It includes a literature survey and a thorough theoretical investigation into designing the model of the link in f

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47

Despins, Charles L. B. (Charles Louis Bertrand) Carleton University Dissertation Engineering Electrical. "Coding and optimum baseband combining for wideband TDMA indoor wireless channels." Ottawa, 1991.

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48

Higashino, Satoru. "Study on signal processing and coding techniques for high density optical information storage channels." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/135949.

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Peng, Guan-Ju, and 彭冠舉. "Optimal Rate Allocation for Scalable Video Coding." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/30742692758923581680.

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博士<br>國立臺灣大學<br>電機工程學研究所<br>100<br>The scalable video coding problem is investigated, and based on the preferred resolution, the bit allocation problems of wavelet-based scalable video coding and H.264/SVC are formulated and solved. For the wavelet-based video encoder, three methods are proposed. The first is an efficient Lagrangian-based method that solves the upper bound of the problem optimally, and the second is a less efficient dynamic programming method that solves the problem optimally. Both methods require knowledge of the user preference on resolution. For the case where the user pref

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Haung, Cheng-wei, and 黃正維. "Optimal Tiling Algorithms for Intra-frame Video Coding." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/9wzh8u.

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碩士<br>國立臺灣科技大學<br>資訊工程系<br>99<br>Algorithms for best basis search in tree-structured dictionaries have been effectively used for many signal processing problems, including noise removal, image compression, audio compression, and image segmentation. An important class of best basis algorithms are methods that search for an optimal rectangular tiling of an image. Such methods can significantly improve the performance of image coding strategies based on block or lapped transforms through adapting the sizes and shapes of transform blocks to the structure of an image. H.264/AVC employs variable-blo

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