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Dissertations / Theses on the topic 'Codec2'

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Published: 4 June 2021

Last updated: 13 February 2022

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1

Sampath, Kumar Santhiya. "Implementation of Low-Bit Rate Audio Codec, Codec2, in Verilog on Modern FPGAS." Miami University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=miami158819886466373.

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2

Chiaventone, Owen, Kyle Avola, and Stetson Tuschhoff. "INEXPENSIVE UHF TRANSCEIVER LEVERAGING COTS COMPONENTS." International Foundation for Telemetering, 2017. http://hdl.handle.net/10150/626996.

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This paper describes the design of an inexpensive UHF transceiver which leverages some of the recently developed commercial off-the-shelf (COTS) components. The initial goal is to implement digital voice transmit and receive function, although the design can accommodate a wide range of digital communication and telemetry applications. The handheld transceiver transmits 5 watts of power in the 430-435 MHz UHF band. A 1.2 kHz wide GFSK modulation format is used, generated by a Silicon Labs radio chip. The recently released Raspberry Pi Zero processor implements a low bit rate audio coding which

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3

Xu, Danfeng. "Iterative coded multiuser detection using LDPC codes." Thesis, University of Ottawa (Canada), 2007. http://hdl.handle.net/10393/27939.

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Multiuser detection (MUD) has been regarded as an effective technique for combating cochannel interference (CCI) in time-division multiple access (TDMA) systems and multiple access interference (MAI) in code-division multiple access (CDMA) systems. An optimal multiuser detector for coded multiuser systems is usually practically infeasible due to the associated complexity. An iterative receiver consisting of a soft-input soft-output (SISO) multiuser detector and a bank of SISO single user decoders can provide a system performance which approaches to that of single user system after a few itera

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4

Xia, Bo. "Importance sampling for LDPC codes and turbo-coded CDMA." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/290093.

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Low-density parity-check (LDPC) codes have shown capacity-approaching performance with soft iterative decoding algorithms. Simulating LDPC codes at very low error rates normally takes an unacceptably long time. We consider importance sampling (IS) schemes for the error rate estimation of LDPC codes, with the goal of dramatically reducing the necessary simulation time. In IS simulations, the sample distribution is biased to emphasize the occurrence of error events and efficiency can be achieved with properly biased sample distributions. For LDPC codes, we propose an IS scheme that overcomes a d

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5

How, Hee Thong. "Wideband speech and audio compression for wireless communications." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342850.

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6

Britton, Eliot. "Codecs." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=116135.

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This thesis contains two volumes. The first is a written text that describes my compositional techniques in the context of an analysis of Codecs. The second volume is the score of this work. Volume one is divided into six sections: Introduction, harmony, rhythm and time, melodic materials, form, live electronics and future directions. Each section describes techniques and processes I developed throughout the compositional process.<br>Codecs was inspired by the subversive proliferation musical materials though the use of audio codecs. I developed compositional tools based on encryption and comp

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7

Kühn, Stefan. "Organic codes and their identification : is the histone code a true organic code." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86673.

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Thesis (MSc)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Codes are ubiquitous in culture|and, by implication, in nature. Code biology is the study of these codes. However, the term `code' has assumed a variety of meanings, sowing confusion and cynicism. The rst aim of this study is therefore to de ne what an organic code is. Following from this, I establish a set of criteria that a putative code has to conform to in order to be recognised as a true code. I then o er an information theoretical perspective on how organic codes present a viable method of dealing with biological i

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8

Tee, James Seng Khien. "On concatenated single parity check codes and bit interleaved coded modulation." Thesis, University of Canterbury. Electrical and Electronic Engineering, 2001. http://hdl.handle.net/10092/5463.

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In recent years, the invention of Turbo codes has spurred much interest in the coding community. Turbo codes are capable of approaching channel capacity closely at a decoding complexity much lower than previously thought possible. Although decoding complexity is relatively low, Turbo codes are still too complex to implement for many practical systems. This work is focused on low complexity channel coding schemes with Turbo-like performance. The issue of complexity is tackled by using single parity check (SPC) codes, arguably the simplest codes known. The SPC codes are used as component codes

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9

Panagos, Adam G., and Kurt Kosbar. "A METHOD FOR FINDING BETTER SPACE-TIME CODES FOR MIMO CHANNELS." International Foundation for Telemetering, 2005. http://hdl.handle.net/10150/604782.

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ITC/USA 2005 Conference Proceedings / The Forty-First Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2005 / Riviera Hotel & Convention Center, Las Vegas, Nevada<br>Multiple-input multiple output (MIMO) communication systems can have dramatically higher throughput than single-input, single-output systems. Unfortunately, it can be difficult to find the space-time codes these systems need to achieve their potential. Previously published results located good codes by minimizing the maximum correlation between transmitted signals. This paper shows how thi

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Jorge, Otávio Calegari 1988. "Codemò : escravos sem grilhões : vida operária ao redor da zona franca CODEVI em Ouanaminthe, Haiti." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/279615.

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Orientadores: Fernando Antonio Lourenço, Omar Ribeiro Thom<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Filosofia e Ciências Humanas<br>Made available in DSpace on 2018-08-25T21:10:20Z (GMT). No. of bitstreams: 1 Jorge_OtavioCalegari_M.pdf: 31947336 bytes, checksum: ffd3ef2aac1c6bc64060cb2227cdfd24 (MD5) Previous issue date: 2014<br>Resumo: Este trabalho tem como objetivo compreender, tendo como referência inicial, mas não exclusiva, a produção intelectual haitiana e dominicana, bem como uma experiência de campo de 3 meses, as relações estabelecidas entre traba

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Kim, Han Jo. "Improving turbo codes through code design and hybrid ARQ." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0012169.

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12

Rodriguez, Fernandez Carlos Gustavo. "Machine learning quantum error correction codes : learning the toric code /." São Paulo, 2018. http://hdl.handle.net/11449/180319.

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Orientador: Mario Leandro Aolita<br>Banca:Alexandre Reily Rocha<br>Banca: Juan Felipe Carrasquilla<br>Resumo: Usamos métodos de aprendizagem supervisionada para estudar a decodiﬁcação de erros em códigos tóricos de diferentes tamanhos. Estudamos múltiplos modelos de erro, e obtemos ﬁguras da eﬁcácia de decodiﬁcação como uma função da taxa de erro de um único qubit. Também comentamos como o tamanho das redes neurais decodificadoras e seu tempo de treinamento aumentam com o tamanho do código tórico.<br>Abstract: We use supervised learning methods to study the error decoding in toric codes ofdiff

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Muller, Wayne. "East City Precinct Design Code: Redevelopment through form-based codes." Master's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/12952.

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Includes bibliographical references.<br>This thesis confines itself to a consideration of urban development opportunity in the East City Precinct through the understanding of it former historical character and memory which can be implemented through Form Based Codes. It locates the design process in the sub-regional context and puts forward notional spatial proposal for the physical area of the East City Precinct and its surrounds. The application of theory is tested at precinct level and emphasis remains firmly on the public elements ordering the spatial structure. With all these consideratio

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Weng, Wen-Yen. "Universal serially concatenated trellis coded modulations and rate-compatible high-rate LDPC codes." Diss., Restricted to subscribing institutions, 2007. http://proquest.umi.com/pqdweb?did=1324381161&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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Thayananthan, V. "Design of run-length limited partial unit memory codes for digital magnetic recording and trellis coded quantisation based on PUM codes." Thesis, Lancaster University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287264.

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Klaimi, Rami. "Etude de turbocodes non binaires pour les futurs systèmes de communication et de diffusion." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2019. http://www.theses.fr/2019IMTA0141.

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Les systèmes de téléphonie mobile de 4ème et 5ème générations ont adopté comme techniques de codage de canal les turbocodes, les codes LDPC et les codes polaires binaires. Cependant, ces codes ne permettent pas de répondre aux exigences, en termes d’efficacité spectrale et de fiabilité, pour les réseaux de communications futurs (2030 et au-delà), qui devront supporter de nouvelles applications telles que les communications holographiques, les véhicules autonomes, l’internet tactile … Un premier pas a été fait il y a quelques années vers la définition de codes correcteurs d’erreurs plus puissan

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Lawson, John. "Duty specific code driven design methodology : a model for better codes." Thesis, University of Aberdeen, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274818.

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The thesis examines Engineering Design and its methodology in general before examining and comparing the principal differences between Inventive Design and Development Design. This latter branch of design is described in detail, recognising that it is executed in accordance with recognised specifications, design codes and standards. Design Codes and Standards are analysed in terms of the service they provide to the professional design engineer who will normally work under the procedures and accepted standards of a Professional Design House. Professional design is an important part of all di

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18

Firmanto, Welly T. (Welly Teguh) Carleton University Dissertation Engineering Systems and Computer. "Code combining of Reed-Muller codes in an indoor wireless environment." Ottawa, 1995.

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19

Veluri, Subrahmanya Pavan Kumar. "Code Verification and Numerical Accuracy Assessment for Finite Volume CFD Codes." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/28715.

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A detailed code verification study of an unstructured finite volume Computational Fluid Dynamics (CFD) code is performed. The Method of Manufactured Solutions is used to generate exact solutions for the Euler and Navier-Stokes equations to verify the correctness of the code through order of accuracy testing. The verification testing is performed on different mesh types which include triangular and quadrilateral elements in 2D and tetrahedral, prismatic, and hexahedral elements in 3D. The requirements of systematic mesh refinement are discussed, particularly in regards to unstructured meshes. D

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20

Rinaldi, Luca. "Codici ciclici e basi di Gröbner." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8714/.

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Richiamo di elementi di algebra, tra cui: polinomi, ordini monomiali e base di Gröbner per ideali e sottomoduli con anche algoritmo FGLM. Descrizione dei codici, dei codici lineari, codifica e decodifica, matrice generatrice, matrice forma standard, matrice di controllo parità, codici ciclici con corrispondenza con ideali e polinomi generatori. Codice Reed-Solomon caso particolare di codice ciclico. Codici ciclici m-dimensionali e codifica sistematica con basi di Gröbner. Algoritmo di decodifica per Reed-Solomon con soluzione chiave e utilizzando basi di Gröbner sui sottomoduli.

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21

Elsabrouty, Maha. "Receiver-based packet loss concealment for pulse code modulation (PCM G.711) coders." Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6306.

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Voice-over-IP (VoIP), the transmission of packetized voice over IP networks, is gaining much attention as a possible alternative to conventional Public Switched Telephone Networks (PSTN). However, impairments present on IP networks, namely jitter, delay and channel errors can lead to the loss of packets at the receiving end. This packet loss degrades the speech quality. Model-based coders, especially G.729-A and G.723.1 International Telecommunication Union (ITU-T) Standards, have been extensively used for speech coding over IP networks because of their inherent ability to recover from erasure

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22

Želtuchin, Alexander. "Orthographic codes and code-switching : a study in 16th century Swedish ortography." Doctoral thesis, Stockholms universitet, Institutionen för nordiska språk, 1996. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-82682.

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Zheltukhin, Alexander. "Orthographic codes and code-switching : a study in 16th century Swedish orthography /." Stockholm : Almqvist & Wiksell, 1996. http://catalogue.bnf.fr/ark:/12148/cb37164838m.

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24

Parttimaa, T. (Tuomas). "Test suite optimisation based on response status codes and measured code coverage." Master's thesis, University of Oulu, 2013. http://urn.fi/URN:NBN:fi:oulu-201305201293.

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A software test suite often comprises of thousands of distinct test cases. Therefore, the execution of an unoptimised test suite might waste valuable time and resources. In order to avoid the unnecessary execution of redundant test cases, the test suite should be optimised to contain fewer test cases. This thesis focuses on the optimisation efforts of a commercially available Hypertext Transfer Protocol (HTTP) fuzzing test suite. A test setup was created for the optimisation purposes. The test setup consisted of the given fuzzing test suite, five different HTTP server implementations used as t

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Ward, Richard Peter. "Evolution of loosely synchronized spreading codes in code-division multiple-access systems." Thesis, University of South Wales, 2008. https://pure.southwales.ac.uk/en/studentthesis/evolution-of-loosely-synchronized-spreading-codes-in-codedivision-multipleaccess-systems(2bf79128-319c-49c1-8246-91ee0d3533c4).html.

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Loosely Synchronized (LS) codes can be used as spreading codes in quasi synchronous code-division multiple-access (QS-CDMA) systems. In such CDMA systems, close control of synchronization is achieved at the chip level, interme diate between that in synchronous CDMA and that in asynchronous CDMA. The LS code can then capitalize on zero correlation in a limited synchronization window to reduce code correlations and so reduce interference. LS codes are {O, +1, -1} codes constructed using Hadamard matrices and Golay pairs. A variation of LS codes inserts short strings of zeros between the compon

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Zhou, Biyun. "Non-binary cyclic codes and its applications in decoding of high dimensional trellis-coded modulation." Ohio : Ohio University, 2000. http://www.ohiolink.edu/etd/view.cgi?ohiou1173380815.

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27

Maurice, Denise. "Codes correcteurs quantiques pouvant se décoder itérativement." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066361/document.

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On sait depuis vingt ans maintenant qu'un ordinateur quantique permettrait de résoudre en temps polynomial plusieurs problèmes considérés comme difficiles dans le modèle classique de calcul, comme la factorisation ou le logarithme discret. Entre autres, un tel ordinateur mettrait à mal tous les systèmes de chiffrement à clé publique actuellement utilisés en pratique, mais sa réalisation se heurte, entre autres, aux phénomènes de décohérence qui viennent entacher l'état des qubits qui le constituent. Pour protéger ces qubits, on utilise des codes correcteurs quantiques, qui doivent non seulemen

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Li, Chao. "Semidefinite programming, binary codes and a graph coloring problem." Digital WPI, 2015. https://digitalcommons.wpi.edu/etd-theses/863.

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"Experts in information theory have long been interested in the maximal size, A(n, d), of a binary error-correcting code of length n and minimum distance d, The problem of determining A(n, d) involves both the construction of good codes and the search for good upper bounds. For quite some time now, Delsarte's linear programming approach has been the dominant approach to obtaining the strongest general purpose upper bounds on the efficiency of error-correcting codes. From 1973 forward, the linear programming bound found many applications, but there were few significant theoretical advances unti

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Madour, Lila. "A low-delay code excited linear prediction speech coder at 8 kbit/s /." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=68042.

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The goal of this thesis is to design a high quality low-delay 8 kb/s speech coder. This research is motivated by the need of the telecommunication industries to standardize a high quality, low-delay and low rate speech coder. To meet these requirements, we use a coder based on code-existed linear prediction. To meet the demands of high quality and low bit rate, a vector quantizer is used to code the excitation signal. To meet the low-delay requirement, a backward adaptation technique of the synthesis filters is used. The focus of the research is on comparing different pitch synthesis filters i

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Diallo, Amadou Tidiane. "Caractérisation analytique et optimisation de codes source-canal conjoints." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00748545.

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Les codes source-canal conjoints sont des codes réalisant simultanément une compression de données et une protection du train binaire généré par rapport à d'éventuelles erreurs de transmission. Ces codes sont non-linéaires, comme la plupart des codes de source. Leur intérêt potentiel est d'offrir de bonnes performances en termes de compression et de correction d'erreur pour des longueurs de codes réduites.La performance d'un code de source se mesure par la différence entre l'entropie de la source à compresser et le nombre moyen de bits nécessaire pour coder un symbole de cette source. La perfo

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Jie, Cao, and Xie Qiu-cheng. "THE SEARCHING METHOD OF QUASI-OPTIMUM GROUP SYNC CODES ON THE SUBSET OF PN SEQUENCES." International Foundation for Telemetering, 1990. http://hdl.handle.net/10150/613438.

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International Telemetering Conference Proceedings / October 29-November 02, 1990 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>As the code length is increasing, the search of optimum group sync codes will be more and more difficult, even impossible. This paper gives the searching method of quasi-optimum group sync codes on the small subset of PN sequences -- CVT-TAIL SEARCHING METHOD and PREFIX-SUFFIX SEARCHING METHOD. We have searched out quasi-optimum group sync codes for their lengths N=32-63 by this method and compared them with corresponding optimum group sync codes for thei

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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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Karafolas, Nikos. "Fiber optic CDMA (Code Division Multiple Access) networks using serial correlation of bipolar codes." Thesis, University of Strathclyde, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284667.

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Arthur, Rangel 1977. "Avaliação objetiva de codecs de video." [s.n.], 2002. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259817.

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Orientador : Roberto de Alencar Lotufo<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-08-01T18:12:02Z (GMT). No. of bitstreams: 1 Arthur_Rangel_M.pdf: 1367399 bytes, checksum: 31930be64350ffcfccd269ee9ffa22a8 (MD5) Previous issue date: 2002<br>Mestrado

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Dernaika, Ghina, and Sophia Khavtasi. "Multimedia Codec Evaluation and Overview." Thesis, Blekinge Tekniska Högskola, Avdelningen för telekommunikationssystem, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1359.

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Movies, songs, conferences, video streams and other multimedia services are spreading in everybody’s life, needs and work. Different types of audio and video codecs of various qualities appear to be used for different purposes. However, each codec can be suitable for a special usage, as for example a codec that can be use for high quality film may not be suitable for streaming it into network. The main purpose of this thesis is to compare the performance of different codecs in one particular scenario and indicate which codec performance is the best. The thesis work includes the investigation o

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Tong, Yanhui. "VHDL implementation of turbo codec." Thesis, University of Ottawa (Canada), 2003. http://hdl.handle.net/10393/26405.

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Turbo coding is one of the most significant achievements in coding theory during the last decade. It has been shown in the literature that transmission systems employing turbo codes could achieve a performance close to the Shannon limit. Turbo decoding is the major contributor to the overall complexity of turbo coding. Therefore, the challenge is to implement turbo coding in various communications systems at affordable decoding complexity using current VLSI technology. Four different turbo decoding algorithms were investigated in this thesis. Comparisons on both their performances and implemen

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Tixier, Audrey. "Reconnaissance de codes correcteurs." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066554/document.

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Dans cette thèse, nous nous intéressons au problème de la reconnaissance de code. Ce problème se produit principalement lorsqu'une communication est observée dans un milieu non-coopératif. Une liste de mots bruités issus d'un code inconnu est obtenue, l'objectif est alors de retrouver l'information contenue dans ces mots bruités. Pour cela, le code utilisé est reconstruit afin de décoder les mots observés. Nous considérons ici trois instances de ce problème et proposons pour chacune d'elle une nouvelle méthode. Dans la première, nous supposons que le code utilisé est un turbo-code et nous prop

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Bouraoui, Mustapha. "Elaboration et implantation sur DSP d'un codeur bas débit de la parole de faible complexité : apport des codes correcteurs parfaits." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0077.

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Cette etude a pour objet l'elaboration et l'implantation d'un codeur de parole de type celp. L'application visee concerne le stockage des messages telephoniques dans un repondeur numerique. Etant donnee le contexte industriel de cette etude, une attention particuliere a ete portee a la complexite du codeur a elaborer. C'est ainsi qu'un quantificateur vectoriel algebrique spherique a ete mis au point pour coder le signal de parole residuel. Ce quantificateur est base sur des codes correcteurs d'erreurs parfaits et presente une tres faible complexite de mise en uvre ainsi que de bonnes performan

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Rowitch, Douglas Neal. "Convolutional and turbo coded multicarrier direct sequence CDMA, and applications of turbo codes to hybrid ARQ communication systems /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1998. http://wwwlib.umi.com/cr/ucsd/fullcit?p9835385.

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Miller, John. "High code rate, low-density parity-check codes with guaranteed minimum distance and stopping weight /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2003. http://wwwlib.umi.com/cr/ucsd/fullcit?p3090443.

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Merensky, Alexander Mark. "A multi-dimensional code-division-multiplexed OFDMA modem using cyclic rotated orthogonal complete complementary codes." Diss., University of Pretoria, 2012. http://hdl.handle.net/2263/31146.

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COMEAU, CHARLES, and JOSEPH FISHER. "MEASURING THE PERFORMANCE OF TELEMETRY VIDEO CODECS." International Foundation for Telemetering, 1989. http://hdl.handle.net/10150/614493.

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International Telemetering Conference Proceedings / October 30-November 02, 1989 / Town & Country Hotel & Convention Center, San Diego, California<br>The Range Commanders Council has recently approved standard RCC 209-88 which defines the compression algorithms and communications frame structure for telemetry video coders. The compression algorithm is very flexible permitting the TV image to be encoded using either 2 bit or 3 bit DPCM, sub-sampled or not, coarse of fine quantizations. Any combination of these modes of operation can be selected and changed on a line-to-line basis. Each manufac

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Isik, Cem Vedat. "Implementation Of A Distributed Video Codec." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/2/12609240/index.pdf.

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Current interframe video compression standards such as the MPEG4 and H.264, require a high-complexity encoder for predictive coding to exploit the similarities among successive video frames. This requirement is acceptable for cases where the video sequence to be transmitted is encoded once and decoded many times. However, some emerging applications such as video-based sensor networks, power-aware surveillance and mobile video communication systems require computational complexity to be shifted from encoder to decoder. Distributed Video Coding (

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Su, Yeping. "Advanced techniques for video codec optimization /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/5933.

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Ross, Johan, and Hans Engström. "Voice Codec for Floating Point Processor." Thesis, Linköping University, Department of Electrical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15763.

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<p>As part of an ongoing project at the department of electrical engineering, ISY, at Linköping University, a voice decoder using floating point formats has been the focus of this master thesis. Previous work has been done developing an mp3-decoder using the floating point formats. All is expected to be implemented on a single DSP.The ever present desire to make things smaller, more efficient and less power consuming are the main reasons for this master thesis regarding the use of a floating point format instead of the traditional integer format in a GSM codec. The idea with the low precision

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Chen, Jia-Ping, and 陳佳蘋. "A Codec Architecture for Hermitian Codes." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/51604953682407474076.

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博士<br>國立清華大學<br>電機工程學系<br>92<br>In this thesis, a codec architecture of Hermitian codes which is able to target a low hardware complexity of implementation is presented. By exploiting the theory of Grobner bases for modules, we develop a serial-in-serial-out hardware architecture, similar to a classical cyclic encoder, for the systematic encoding scheme of Hermitian codes. By deriving the upper bounds of the numbers of memory elements and constant multipliers in the proposed architecture, we show that the complexity of our architecture is much less than that of the brute-force systematic encod

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Li, Chang-Hong, and 李昌鴻. "Product Coded Multilevel Codes." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/53uu97.

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碩士<br>國立臺北科技大學<br>電機工程系<br>106<br>Product codes and Multilevel Coset codes are powerful coding techniques for constructing long codes from existing short codes. In this thesis, we proposed a Multilevel Coset coding scheme. The multilevel component codes which are constructed from Reed-Solomon codes and short block codes. Since we use a multistage decoding algorithm, the decoding complexity is reasonable. The simulation results show that our proposed schemes have significant coding gains.

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Tseng, Da-Wen, and 曾大文. "Using MMX code within MPEG Audio Codec." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/05116004993667118681.

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碩士<br>國立臺灣大學<br>電機工程學研究所<br>90<br>The Moving Picture Experts Group (MPEG) is a working group of ISO/IEC in charge of the development of standards for coded representation of digital audio and video. In the audio part, we always use CD to store WAVE file, but it takes lots of hard disk space. So the MPEG Audio Encoder compresses wav. to mp2. or mp3. files. It just throws the voice that humans can’t hear and makes the file smaller so as to store more ones. In the codec, at bit rates from 64kb/s up to 192kb/s per channel, MPEG Audio Layer II can provide a sound quality that is competit

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Liao, Jimmy J. M., and 廖俊閔. "Design and Implementation of Block Turbo Code Codec." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/pnsada.

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碩士<br>國立交通大學<br>電子工程系所<br>96<br>In this thesis, a block turbo code of 802.16e is proposed. Unlike the conventional decoding algorithm requiring empirically derived parameters, the proposed geometric-like algorithm uses hamming distance to compensate the information. Not only improving the error performance, the proposed algorithm also facilitates hardware implementation. Moreover, a design methodology for parallel architecture is presented to meet various throughputs. The memory accessing hazard in parallel architecture can be overcome by the proposed multi-bank-array algorithm. The proposed a

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蔡錫欣. "Low Power Bus Codec Scheme with Gray Code." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/88486942264081638468.

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碩士<br>國立彰化師範大學<br>資訊工程學系<br>101<br>As technology advances, interconnect delay has become a significant element for circuit performance in deep sub-micrometers system on-chip designs. The data pattern dependent signal switching of crosstalk caused delays compels bus cycle time for the worst case in many digital processors. Because of on-chip bus power is dominated by the switching activities. So this method correlated switching and the proposed codec can effectively solve the above-mentioned problem. The paper are performed on 4-bits and 8-bits bus line based on TSMC 0.18μm, the experiment resu

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