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Relevant bibliographies by topics / Signal processing; Telephony; Multimedia / Dissertations / Theses

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Dissertations / Theses on the topic 'Signal processing; Telephony; Multimedia'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Oberhofer, Robert. "Pitch adaptive variable bitrate CELP speech coding." Thesis, University of Ulster, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264811.

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2

Athanasiadis, Tasso, and tas atha@bigpond net au. "Signal Processing Techniques for Mobile Multimedia Systems." RMIT University. Electrical and Computer Engineering, 2007. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080123.115457.

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Recent trends in wireless communication systems show a significant demand for the delivery of multimedia services and applications over mobile networks - mobile multimedia - like video telephony, multimedia messaging, mobile gaming, interactive and streaming video, etc. However, despite the ongoing development of key communication technologies that support these applications, the communication resources and bandwidth available to wireless/mobile radio systems are often severely limited. It is well known, that these bottlenecks are inherently due to the processing capabilities of mobile transmi

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El, Malki Karim. "A novel approach to high quality voice using echo cancellation and silence detection." Thesis, University of Sheffield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286579.

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Guo, Liwei. "Restoration and modeling for multimedia compression /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?ECED%202008%20GUOL.

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5

Houas, Heykel. "Allocation de ressources pour la transmission de données multimedia scalables." Phd thesis, Université de Cergy Pontoise, 2009. http://tel.archives-ouvertes.fr/tel-00767889.

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Cette thèse s'intéresse aux problèmes d'allocation de ressources pour la transmission de données multimédia scalables sous contraintes de qualité de service (QoS) sur les réseaux hétérogènes. Les liaisons filaires et sans fil considérées (DS-CDMA, OFDMA) sont appliquées à des services de transmission d'images et de parole sur des canaux à évanouissements lents ou rapides, avec ou sans multitrajets. La QoS de ces réseaux est exprimée en terme de qualité perçue du point de vue de l'utilisateur (couche Application) et en terme de taux d'erreurs binaires (TEB) par classe du point de vue de la tran

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Bakken, Marianne. "Signal Processing for Communicating Gravity Wave Images from the NTNU Test Satellite." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19229.

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The NTNU Test Satellite (NUTS) is planned to have a payload for observation of atmospheric gravity waves. The gravity waves will be observed by means of an infrared camera imaging the perturbations in the OH airglow layer. So far, no suitable camera has been found that complies with the restrictions that follows when building a small satellite. Uncooled InGaAs has however been concluded to be the most suitable detector type in terms of wavelength response and weight.InGaAs sensors are known to have a high dark current when not cooled, and processing must therefore be applied to remove the back

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7

DeBardelaben, James Anthony. "An optimization-based approach for cost-effective embedded DSP system design." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/15757.

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8

Shen, Ju. "Computational Multimedia for Video Self Modeling." UKnowledge, 2014. http://uknowledge.uky.edu/cs_etds/26.

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Video self modeling (VSM) is a behavioral intervention technique in which a learner models a target behavior by watching a video of oneself. This is the idea behind the psychological theory of self-efficacy - you can learn or model to perform certain tasks because you see yourself doing it, which provides the most ideal form of behavior modeling. The effectiveness of VSM has been demonstrated for many different types of disabilities and behavioral problems ranging from stuttering, inappropriate social behaviors, autism, selective mutism to sports training. However, there is an inherent difficu

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9

Sezer, Osman Gokhan. "Data-driven transform optimization for next generation multimedia applications." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42765.

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The objective of this thesis is to formulate a generic dictionary learning method with the guiding principle that states: Efficient representations lead to efficient estimations. The fundamental idea behind using transforms or dictionaries for signal representation is to exploit the regularity within data samples such that the redundancy of the representation is minimized subject to a level of fidelity. This observation translates to rate-distortion cost in compression literature, where a transform that has the lowest rate-distortion cost provides a more efficient representation than the other

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10

Borin, Rogério Guerra. "Detecção de atividade vocal empregando máquinas de Boltzmann restritas." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3142/tde-23012017-141914/.

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Neste trabalho, uma versão de RBM (Restricted Boltzmann Machine) tendo uma camada de classificação é adaptada a fim de permitir o seu uso com dados definidos num domínio contínuo. Essa adaptação dá origem a uma variante do modelo para o qual são desenvolvidas as regras de atualização de parâmetros dos treinamentos discriminativo, generativo e híbrido. A aplicação da variante como classificador no problema de VAD (Voice Activity Detection) é então investigada. Por meio de simulações envolvendo o corpus NOIZEUS e empregando como entradas do classificador tanto MFCCs (Mel-Frequency Cepstral Coeff

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Narapareddy, Yagna Brahma Sai. "QoE Performance Evaluation by Introducing Video Freeze on Mobile Multimedia." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-18995.

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Real time video streaming through mobile Internet is increasing day by day and the video quality can be affected very badly by network performance issues. Video freezing and video jumping are one of the serious issues that affect the user experience badly. Hence service providers are interested to evaluate the performance of quality of experience. We follow the methods from the International Telecommunications Union–Telecommunication Sector(ITU-T)recommendations. In this thesis, we are studying the effect of freezing on user experience by subjective tests and obtaining the mean opinion sco

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Uzuegbunam, Nkiruka M. A. "SELF-IMAGE MULTIMEDIA TECHNOLOGIES FOR FEEDFORWARD OBSERVATIONAL LEARNING." UKnowledge, 2018. https://uknowledge.uky.edu/ece_etds/124.

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This dissertation investigates the development and use of self-images in augmented reality systems for learning and learning-based activities. This work focuses on self- modeling, a particular form of learning, actively employed in various settings for therapy or teaching. In particular, this work aims to develop novel multimedia systems to support the display and rendering of augmented self-images. It aims to use interactivity (via games) as a means of obtaining imagery for use in creating augmented self-images. Two multimedia systems are developed, discussed and analyzed. The proposed system

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13

Yang, Yimin. "Exploring Hidden Coherent Feature Groups and Temporal Semantics for Multimedia Big Data Analysis." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2254.

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Thanks to the advanced technologies and social networks that allow the data to be widely shared among the Internet, there is an explosion of pervasive multimedia data, generating high demands of multimedia services and applications in various areas for people to easily access and manage multimedia data. Towards such demands, multimedia big data analysis has become an emerging hot topic in both industry and academia, which ranges from basic infrastructure, management, search, and mining to security, privacy, and applications. Within the scope of this dissertation, a multimedia big data analysis

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Dikbas, Salih. "A low-complexity approach for motion-compensated video frame rate up-conversion." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42730.

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Video frame rate up-conversion is an important issue for multimedia systems in achieving better video quality and motion portrayal. Motion-compensated methods offer better quality interpolated frames since the interpolation is performed along the motion trajectory. In addition, computational complexity, regularity, and memory bandwidth are important for a real-time implementation. Motion-compensated frame rate up-conversion (MC-FRC) is composed of two main parts: motion estimation (ME) and motion-compensated frame interpolation (MCFI). Since ME is an essential part of MC-FRC, a new fast motion

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Irani, Ramin. "Error Detection for DMB Video Streams." Thesis, Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-5086.

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The purpose of this thesis is to detect errors in Digital Multimedia Broadcasting (DMB) transport stream. DMB uses the MPEG-4 standard for encapsulating Packetized Elementary Stream (PES), and uses the MPEG-2 standard for assembling them in the form of transport stream packets. Recently many research works have been carried out about video stream error detection. They mostly do this by focusing on some decoding parameters related to frame. Processing complexity can be a disadvantage for the proposed methods. In this thesis, we investigated syntax error occurrences due to corruption in the head

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Laurier, Cyril François. "Automatic Classification of musical mood by content-based analysis." Doctoral thesis, Universitat Pompeu Fabra, 2011. http://hdl.handle.net/10803/51582.

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In this work, we focus on automatically classifying music by mood. For this purpose, we propose computational models using information extracted from the audio signal. The foundations of such algorithms are based on techniques from signal processing, machine learning and information retrieval. First, by studying the tagging behavior of a music social network, we find a model to represent mood. Then, we propose a method for automatic music mood classification. We analyze the contributions of audio descriptors and how their values are related to the observed mood. We also propose a multimodal ve

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17

Kharbouche, Said. "Fonctions de Croyance et Indexation MultimodaleApplication à l'Identification de Personnes dans des Albums." Phd thesis, Université de Rouen, 2006. http://tel.archives-ouvertes.fr/tel-00232806.

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Cette thèse se situe dans la cadre de l'organisation semi-automatique d'albums photo et s'intègre dans un cadre applicatif particulier d'un prototype de service développé par la division recherche et développement de France Telecom. Dans ce cadre applicatif, les photos peuvent être partagées entre plusieurs personnes et peuvent êtres commentées vocalement et/ou textuellement par ces déférents utilisateurs. Le processus d'indexation développé dans cette thèse ne se limite pas seulement à l'indexation d'une collection d'images mais traite également leurs commentaires associés ce qui rend ces con

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18

Karaman, Svebor. "Indexation de la Vidéo Portée : Application à l'Étude Épidémiologique des Maladies Liées à l'Âge." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2011. http://tel.archives-ouvertes.fr/tel-00689855.

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Le travail de recherche de cette thèse de doctorat s'inscrit dans le cadre du suivi médical des patients atteints de démences liées à l'âge à l'aide des caméras videos portées par les patients. L'idée est de fournir aux médecins un nouvel outil pour le diagnostic précoce de démences liées à l'âge telles que la maladie d'Alzheimer. Plus précisément, les Activités Instrumentales du Quotidien (IADL : Instrumental Activities of Daily Living en anglais) doivent être indexées automatiquement dans les vidéos enregistrées par un dispositif d'enregistrement portable. Ces vidéos présentent des caractéri

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PALLONE, Grégory. "DILATATION ET TRANSPOSITION SOUS CONTRAINTES PERCEPTIVES DES SIGNAUX AUDIO : APPLICATION AU TRANSFERT CINEMA-VIDEO." Phd thesis, Université de la Méditerranée - Aix-Marseille II, 2003. http://tel.archives-ouvertes.fr/tel-00003363.

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La coexistence de deux formats : cinéma à 24 images/s et vidéo à<br />25 images/s, implique l'accélération ou le ralentissement de la<br />bande-son lors du transfert d'un format vers l'autre. Ceci<br />provoque une modification temporelle du signal sonore, et par<br />conséquent une modification spectrale avec altération du timbre.<br />Les studios de post-production audiovisuelle souhaitent compenser<br />cet effet par l'application d'une transformation sonore adéquate.<br /><br />L'objectif de ce travail est de fournir à l'industrie<br />audiovisuelle un système permettant de pallier la mod

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20

Liu, Ming. "Analyse et optimisation du système asiatique de diffusion terrestre et mobile de la télévision numérique." Phd thesis, INSA de Rennes, 2011. http://tel.archives-ouvertes.fr/tel-00662247.

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Cette thèse a pour objectif l'analyse du système de télévision numérique chinois (DTMB) et l'optimisation de sa fonction d'estimation de canal. Tout d'abord, une analyse approfondie de ce système est effectuée en comparaison du système DVB-T en termes de spécifications, d'efficacité spectrale et de performances. Ensuite, la fonction d'estimation de canal basée sur la séquence pseudo-aléatoire du système est étudiée dans les domaines temporel et fréquentiel, et plusieurs améliorations sont apportées aux méthodes typiques afin de notamment gérer les canaux très dispersifs en temps. Enfin, de nou

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21

Oliver, Gil José Salvador. "On the design of fast and efficient wavelet image coders with reduced memory usage." Doctoral thesis, Universitat Politècnica de València, 2008. http://hdl.handle.net/10251/1826.

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Image compression is of great importance in multimedia systems and applications because it drastically reduces bandwidth requirements for transmission and memory requirements for storage. Although earlier standards for image compression were based on the Discrete Cosine Transform (DCT), a recently developed mathematical technique, called Discrete Wavelet Transform (DWT), has been found to be more efficient for image coding. Despite improvements in compression efficiency, wavelet image coders significantly increase memory usage and complexity when compared with DCT-based coders. A majo

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22

"Energy and Quality-Aware Multimedia Signal Processing." Doctoral diss., 2012. http://hdl.handle.net/2286/R.I.15781.

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abstract: Today's mobile devices have to support computation-intensive multimedia applications with a limited energy budget. In this dissertation, we present architecture level and algorithm-level techniques that reduce energy consumption of these devices with minimal impact on system quality. First, we present novel techniques to mitigate the effects of SRAM memory failures in JPEG2000 implementations operating in scaled voltages. We investigate error control coding schemes and propose an unequal error protection scheme tailored for JPEG2000 that reduces overhead without affecting the perform

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23

Wires, Kent Eugene. "Arithmetic units for digital signal processing and multimedia /." Diss., 2000. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:9995545.

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24

Cheng, Le-Tien, and 鄭樂天. "Implementation of Multimedia Digital Signal Processing Module Using Partial Reconfiguration Architecture." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/13047088512639675017.

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碩士<br>元智大學<br>資訊工程學系<br>97<br>In this thesis, we propose the implement of multimedia digital image processing module using partial reconfiguration method, we choose discrete cosine transform (DCT) and inverse discrete cosine transform (IDCT) as the example, the use characteristic of the matrix transpose to build a architecture easier using partial reconfiguration implement discrete cosine transform and inverse discrete cosine transform. we use the Verilog HDL within Xilinx ISE 9.2i design tool to complete this architecture. After that, we use FPGA for function simulation and verify computation

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Chao, Wei-Min, and 趙維民. "Design and Implementation of Pyramid Architecture for Image Signal Processing in Multimedia Applications." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/48940862255957534055.

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博士<br>國立臺灣大學<br>電子工程學研究所<br>99<br>Image-processing algorithms have played an essential role in our daily life for entertainment, video communication, and computer vision. Various kinds of algorithms are linked together to carry out a super filtering to retrieve meaningful information from 2-D images. To carry out these algorithms in the real-time performance with the modern VLSI design, parallelism is a major architecture design skill to seek for a way to a framework with many computing units and separated memory modules. Larger problems can be divided into several tasks with pieces of the int

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Wang, Mei-Rong, and 王美蓉. "Implementation of an Integrated Signal Processing Board for a Versatile Multimedia System Based on TMS320C80." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/06309175934824831413.

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Meei-Rong, Wang, and 王美蓉. "Implementation of an Integrated Signal Processing Board for a Versatile Multimedia System Based on TMS320C80." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/97266196783399958732.

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碩士<br>國立雲林科技大學<br>電子與資訊工程技術研究所<br>86<br>This thesis presents the design and implementation of a DSP board based on the TMS320C80 multimedia video processor (MVP).We integrate various multi-media IC components to establish a PC-based versatile multimedia codec (VMMC)system.The architecture of this VM C board comprises a high-performance C80 parel-le programmable processor, memory ( SRAM, DRAM, VRAM, EPROM ), and peipheral devices ( video capture/display, PCI interface, etc. ).In this thesis, we concentrate on the design tasks of the C80 processor, and the associated cont-rol circuits for memory

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Zhu, Jihai. "Low-complexity block dividing coding method for image compression using wavelets : a thesis presented in partial fulfillment of the requirements for the degree of Master of Engineering in Computer Systems Engineering at Massey University, Palmerston North, New Zealand." 2007. http://hdl.handle.net/10179/704.

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Image coding plays a key role in multimedia signal processing and communications. JPEG2000 is the latest image coding standard, it uses the EBCOT (Embedded Block Coding with Optimal Truncation) algorithm. The EBCOT exhibits excellent compression performance, but with high complexity. The need to reduce this complexity but maintain similar performance to EBCOT has inspired a significant amount of research activity in the image coding community. Within the development of image compression techniques based on wavelet transforms, the EZW (Embedded Zerotree Wavelet) and the SPIHT (Set Partitioning

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Grégory, Païs. "Analyse conjointe texte et image pour la caractérisation de films d'animation." Phd thesis, 2010. http://tel.archives-ouvertes.fr/tel-00750619.

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Le développement rapide des nouvelles technologies de l'information a provoqué ces dernières années une augmentation considérable de la masse de données à disposition de l'utilisateur. Afin d'exploiter de manière rationnelle et efficace l'ensemble de ces données la solution passe par l'indexation de ces documents multimédia. C'est dans ce contexte que ce situe cette thèse et plus spécifiquement dans celui de l'indexation d'une base numérique de films d'animation, telle que celle mise en place par la CITIA (Cité de l'image en mouvement). L'objectif principal de cette thèse est de proposer une m

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