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The paper is about the transmission, compression, detection of the video based on simulation for the various communication applications. The video and image compression overcomes the problem of reducing the amount of data required to the information that has to be transmitted and this saves the bandwidth required for transmission of data and memory which is required for storage purpose. Hence video compression reduces the volume of the video data with a small change in quality of the video. Compressed video transmission can be done over a channel by huffman coding for the source at transmitter side and then channel codes is done by technique called hamming. The data which is to be sent through channel is a BPSK modulated so the received data is demodulated followed by the channel decoding, source decoding using inverse of the techniques used in the transmitter side to obtain the original transmitted video. The above procedure is done for the input video taken by camera and this compressed video can be transmitted then detected at receiver by digital communication system(DCS) which is simulated in the MATLAB.

In modern IT world, we are returning to the problem of low storage space. May be typically users do not see this problem and still there is more data that companies collect and should store. In this work author analyzed Huffman compression algorithm it’s effectiveness, working principles and examples of usage.

RESUMEN: En este trabajo se va a realizar el estudio de un codificador de video basado en el estándar H.261. Se llevará a cabo un análisis de cada uno de los módulos necesarios para su implementación. Se realizará un código software en C/C++ de los algoritmos y se obtendrá un resultado a evaluar. ABSTRACT: For this work, a video encoder based on the H.261 standard will be studied. To do this, an analysis of each modules is necessary for its implementation. A software code will be made in C / C ++ of the algorithms and a result to be evaluated will be obtained. Grado en Ingeniería de Tecnologías de Telecomunicación

Compression can be used to reduce the size of files and speeding up the transmission time over networks. However, not all compression techniques have the same features and capabilities to improve the performance of transmission over networks. This paper shows a comparison between different compression algorithms in order to improve the performance of web-services over the Internet. Nowadays, Service Oriented Architecture (SOA) being used heavily between applications as interaction between loosely coupled services, which are function independently. Therefore, fast and efficient services offered through the web services are needed. Enhancing performance of web services, would improve overall system's performance. As a result, compressing and reducing the size of SOAP messages traveling over the network, improves the webs-service performance. This paper compares the performance of web-services by compressing SOAP messages using Tagged Sub-optimal Code (TSC) and Huffman Encoding Algorithms. Experimental results show that web-services compressed using TSC speeds up the performance of web-services compared to normal web-services and web-services compressed using Huffman encoding.

U ovom radu obradili smo najosnovnije metode za podudaranje znakovnih nizova i kompresiju teksta. Za svaki od ovih tipova analizirali smo nekoliko najbitnijih algoritama. Algoritme za podudaranje znakovnih nizova podijelili smo na one za egzaktno i aproksimativno podudaranje. Algoritmi egzaktnog podudaranja tražili su dani znakovni uzorak u tekstu, dok su algoritmi aproksimativnog podudaranja tražili riječi slične našem uzorku. Osim naivnog algoritma za egzaktno podudaranje znakovnih nizova, obradili smo i Rabin-Karpov, Knuth-Morris-Prattov, Boyer-Mooreov algoritam te strukturu podataka sufiksnog stabla koja ima veliku primjenu na ovom problemu. Za rješavanje problema aproksimativnog podudaranja koristili smo algoritam računanja edit udaljenosti. Na kraju smo obradili tri algoritma za kompresiju teksta: Shannon-Fanoov, Huffmanovi i Lempel–Ziv–Welshev. In this thesis we covered the most basic methods for string matching and text compression. For each of these two types of algorithms, we analyzed a few of the most important algorithms. We split string matching algorithms into two groups, those for exact string matching and those for approximate string matching. Exact string matching algorithms searched for a given pattern in the text, while the approximate string matching algorithms searched for words similar to our pattern. In addition to the naive string matching algorithm, we have analyzed Rabin-Karp, Knuth-Morris-Pratt and Boyer- Moore algorithm and suffix trie that has a great application on this issue. To solve the problem of approximate string matching we used algorithm for computing edit distance. At the end, we have covered three algorithms for text compression: Shannon-Fanoo, Huffman and Lempel-Ziv-Welsh algorithm.

IZVEDBA OPTIMIRANOG JPEG DEKODERA KORISTEĆI ARM NEON NAREDBE JPEG format predstavlja metodu sažimanja slike s gubitcima koji su prihvatljivi i ne utječu puno na kvalitetu slike. Vrlo je često korišten i podržan od strane različitih aplikacija za obradu i prijenos multimedijskog sadržaja. Zbog toga što je to vrlo raširen format potrebno je omogućiti što efikasnije i brže izvođenje kompresije/dekompresije. Jedna od mogućnosti optimiranja je NEON arhitektonsko proširenje na novijim ARM procesorima. Rad se temelji na optimiranju JPEG dekodera koristeći NEON proširenje. Napravljen je pregled osnovnog načina rada JPEG dekodera i funkcija koje se izvode u aplikaciji te pregled NEON instrukcijskog seta i pripadnih registara. Optimiranje je napravljeno u dvije faze: optimiranje postojećih funkcija određenim preinakama te optimiranje koristeći ugrađene funkcije NEON proširenja u programskom jeziku C. Poseban naglasak je stavljen na optimiranje i važnost članova IDCT-a te shvaćanje Huffmanovog dekodiranja i konverzije boja. IMPLEMENTATION OF OPTIMIZED JPEG DECODER USING ARM NEON INSTRUCTIONS JPEG format represents a method of lossy compression for images that has acceptable losses which don't affect the quality of the image. It is commonly used and supported by various applications used for processing and transporting multimedia data. Because it is a widely used format, it is necessary to provide highly efficient compression/decompression. One of the possibilities for optimization is the NEON architecture extension implemented in newer ARM processors. The focus of the work is the optimization of the JPEG decoder using the NEON extension. An overview of the baseline JPEG decoder and the NEON instruction set and registers was given. Optimization was done in two phases: optimizing the existing functions by making some changes in them and optimizing by using the built-in functions of the NEON extension in C programming language. Emphasis is placed on optimization and the importance of IDCT and the understanding of Huffman decoding and color conversion.

Namen diplomskega dela je bil predstaviti temeljne algoritme za brezizgubno stiskanje podatkov in jih med seboj testirati. V teoretičnem delu najprej na splošno govorimo o značilnostih kodiranja podatkov. Tukaj razjasnimo razlike med več vrstami kod in se podrobneje osredotočimo na kode VLC. Omenjena je tudi informacijska teorija, pri čemer razložimo, zakaj je pomemben element na področju kodiranja. Nato se poglobimo v razlago dejanskih algoritmov, in sicer začnemo s statističnimi algoritmi, kjer opišemo delovanje Shannon-Fanojevega kodiranja, Huffmanovega kodiranja in aritmetičnega kodiranja. Potem preidemo na algoritme, ki dosegajo stiskanje s pomočjo slovarja, in opišemo prvotna algoritma LZ77 in LZ78 ter njuni varianti LZSS in LZW. Za konec opišemo še algoritem Burrows-Wheeler, ki združuje transformaciji Burrows-Wheeler in premakni-na-začetek z entropijskim kodiranjem. V praktičnem delu začnemo z implementacijo algoritmov Huffmanovega kodiranja, aritmetičnega kodiranja, LZSS, LZW in Bzip2. Algoritme implementiramo z odprtokodnimi implementacijami v programskem jeziku Java in za testiranje uporabimo sistem ALGator. Teste izvajamo na več znanih testnih zbirkah, ki so nastale z namenom testiranja brezizgubnega stiskanja. Te zbirke so Calgary, Canterbury, Silesia in Maximum. Po končanem testiranju rezultate primerjamo med seboj in ugotovimo učinkovitost implementiranih algoritmov. The purpose of the thesis is to present the fundamental lossless data compression algorithms, test and compare them. The theoretical part outlines some of the general characteristics of data coding and explores in more detail the differences between different types of codes, particularly VLC codes. Moreover, it touches on the information theory and explains why it plays an important role in coding. It also thoroughly explains actual algorithms, starting with statistical algorithms to describe the functioning of Shannon-Fano coding, Huffman coding and arithmetic coding. Next are algorithms that achieve compression using a dictionary, i.e. algorithms LZ77 and LZ78 and their respective variants LZSS and LZW. The last algorithm presented is the Burrows-Wheeler algorithm that involves the Burrows-Wheeler transformation and move-to-front transformation with entropy coding. As for the practical part, it deals with the implementation and testing of algorithms for Huffman coding, arithmetic coding, LZSS, LZW and Bzip2. The algorithms are implemented with open source implementations in the Java programming language. The ALGator system is used for testing them. The tests are performed on several widely known test collections that were developed for testing lossless compression. Those collections are Calgary, Canterbury, Silesia and Maximum. The comparison of test results determines the effectiveness of the implemented algorithms.

In image compression, we can reduce the quantity of pixels used in image representation without excessively change image Visualization. Reducing image size enhance images sharing, transmitting and storing. This paper examines the performance of a set of lossless data compression algorithms which are RLE, Delta encoding and Huffman techniques on binary image, grey level images and RGB images.

Due to the expansion of datas, compression algorithms are now crucial algorithms. We address here the problem of finding an optimal compression algorithm with respect to a given Markovian source. To this purpose, we extend the classical Huffman algorithm. The kernels are popular methods to measure the similarity between words for classication and learning. We generalize the definition of rational kernels in order to apply kernels to the comparison of languages. We study this generalization for factor and subsequence kerneland prove that these kernels are defined for parameters chosen in an appropriate interval. We give different methods to build weighted transducers which compute these kernels, En raison de l'expansion des données, les algorithmes de compression sont désormais cruciaux. Nous abordons ici le problème de trouver des algorithmes de compression optimaux par rapport à une source de Markov donnée. A cet effet, nous étendons l'algorithme de Huffman classique. Pour se faire premièrement on applique Huffman localement à chaque état de la source Markovienne, en donnant le résultat de l'efficacité obtenue pour cet algorithme. Mais pour bien approfondir et optimiser quasiment l'efficacité de l'algorithme, on donne un autre algorithme qui est toujours appliqué localement à chaque états de la source Markovienne, mais cette fois ci en codant les facteurs partant de ces états de la source Markovienne de sorte à ce que la probabilité du facteur soit une puissance de 1/2 (sachant que l'algorithme de Huffman est optimal si et seulement si tous les symboles à coder ont une probabilité puissance de 1/2). En perspective de ce chapitre on donne un autre algorithme (restreint à la compression de l'étoile) pour coder une expression à multiplicité, en attendant dans l'avenir à coder une expression complète

International audience; PNG (Portable Network Graphics) is a lossless compression method for real-world pictures. Since its specification, it continues to attract the interest of the image processing community. Indeed, PNG is an extensible file format for portable and well-compressed storage of raster images. In addition, it supports all of Black and White (binary mask), grayscale, indexed-color, and truecolor images. Within the framework of the Demat+ project which intend to propose a complete solution for storage and retrieval of scanned documents, we address in this paper a hardware design to accelerate the PNG encoder for binary mask compression on FPGA. For this, an optimized architecture is proposed as part of an hybrid software and hardware cooperating system. For its evaluation, the new designed PNG IP has been implemented on the ALTERA " Arria II GX EP2AGX125EF35 " FPGA. The experimental results show a good match between the achieved compression ratio, the computational cost and the used hardware resources.

A través de la presente memoria se va a realizar un recorrido de cómo se ha venido desarrollando el proceso de trabajo del proyecto “Aplicación gráfica para la compresión de información multimedia”. Durante el desarrollo de los puntos que comprende la misma, se detallará los procedimientos empleados, los métodos realizados y los resultados obtenidos. Todo el proyecto queda amparado bajo la idea de lograr una aplicación eficaz cuya interfaz amigable facilite el aprendizaje al alumno que la utilice.

Statkraft är helägt av Norska staten och är Sveriges fjärde största elproducent. Detta examensarbete syftar till att ta fram en metod för att lösa hur Statkraft Sverige AB ska lagra mjukvarubackuper av sina lokalkontrollssystem. För närvarande finns det ingen homogen lagringsmetod för backuper på företaget och problemet som ska lösas i examensarbetet är hur man kan lagra backuper från ett flertal heterogena system på en gemensam lagringsplattform. I och med att de allra flesta hjälpsystem för konfigurering av styrdatorer (PLC) bygger på Microsoft DOS/Windows så är det relativt enkelt att överföra backuper till en gemensam plattform. För äldre hjälpmedel kan man dock tänka sig att virtualisera hjälpmedlen på en nyare PC-dator med exempelvis VMware för att undvika problem som kan uppstå med äldre hårdvara. Därefter kan man arkivera backuperna i ZIP-format som man kan lagra på en server. Fördelen med att använda sig av ZIP för arkivering är att man får en inbyggd integritetskontroll av backuperna då ZIP har inbyggd cyclic redundancy check (CRC) som använder sig av kontrollsummor för att kontrollera så att filerna är korrekta. Dessutom så får man endast en fil i jämförelse med många filer per backup om man inte använder sig av arkivering. Backuperna ska sedan lagras på en server som ligger inom företagets intranät/kontorsnät som endast behörig personal har tillgång till. Uppladdningen av filerna kan gå till på flera olika sätt, större backupfiler från PC-system kan laddas upp direkt via nätverket och dokumentationen uppdateras manuellt. Mindre backupfiler skulle dock kunna laddas upp genom en webbsida på intranätet där dokumentationen uppdateras automatiskt i samband med uppladdning. Lagringsutrymmet för båda dessa lösningar är dock detsamma så det går även att ladda upp mindre backuper manuellt genom nätverket. Med dessa lösningar har berörda tekniker tillgång till backuperna vart de än befinner sig så länge internetuppkoppling finns genom ett virtuellt privat nätverk (VPN) till företagets intranät/kontorsnät. Statkraft is the fourth largest electricity producer in Sweden and is fully owned by the Norwegian state. This thesis aims to develop a method for solving how Statkraft Sweden AB will store software backups of their local control systems. Currently there is no uniform method of storage for backups in the company and the problem to be solved in the thesis is how to store backups from multiple heterogeneous systems on a single storage platform. Based on the fact that the vast majority of help systems for configuring Programmable Logic Controllers (PLC) is based on Microsoft DOS / Windows, it is relatively simple to transfer the backups to a common platform. With older help systems it is also possible to virtualize these help systems on newer PC-based computers with for example VMware instances to avoid issues that can arise with older hardware. You can then archive the backups in ZIP-format that can be stored on a server, the advantage of using ZIP-archiving is to get a built-in integrity check of backups as ZIP has built in cyclic redundancy check (CRC) that uses checksums to check that the files are correct. Additionally, you get only one file in comparison to many files per backup if you do not archive in for example ZIP-format. The backups are then stored on a server within the company intranet / office network that is restricted to authorized personnel. The upload of the files can be done in several different ways; large backup files from PC-systems can be uploaded directly via the network, and the documentation is updated manually. Smaller and incremental backup files could however be uploaded through a web page on the Intranet, where documentation is automatically updated during upload. The storage space for both of these solutions is the same so that it is also possible to upload smaller backups manually through the network. With these solutions, the technicians can access the backups wherever they are as long as an Internet connection is available thru a virtual private network (VPN) Connection to the company’s intranet/office network.

Statkraft är helägt av Norska staten och är Sveriges fjärde största elproducent. Detta examensarbete syftar till att ta fram en metod för att lösa hur Statkraft Sverige AB ska lagra mjukvarubackuper av sina lokalkontrollssystem. För närvarande finns det ingen homogen lagringsmetod för backuper på företaget och problemet som ska lösas i examensarbetet är hur man kan lagra backuper från ett flertal heterogena system på en gemensam lagringsplattform. I och med att de allra flesta hjälpsystem för konfigurering av styrdatorer (PLC) bygger på Microsoft DOS/Windows så är det relativt enkelt att överföra backuper till en gemensam plattform. För äldre hjälpmedel kan man dock tänka sig att virtualisera hjälpmedlen på en nyare PC-dator med exempelvis VMware för att undvika problem som kan uppstå med äldre hårdvara. Därefter kan man arkivera backuperna i ZIP-format som man kan lagra på en server. Fördelen med att använda sig av ZIP för arkivering är att man får en inbyggd integritetskontroll av backuperna då ZIP har inbyggd cyclic redundancy check (CRC) som använder sig av kontrollsummor för att kontrollera så att filerna är korrekta. Dessutom så får man endast en fil i jämförelse med många filer per backup om man inte använder sig av arkivering. Backuperna ska sedan lagras på en server som ligger inom företagets intranät/kontorsnät som endast behörig personal har tillgång till. Uppladdningen av filerna kan gå till på flera olika sätt, större backupfiler från PC-system kan laddas upp direkt via nätverket och dokumentationen uppdateras manuellt. Mindre backupfiler skulle dock kunna laddas upp genom en webbsida på intranätet där dokumentationen uppdateras automatiskt i samband med uppladdning. Lagringsutrymmet för båda dessa lösningar är dock detsamma så det går även att ladda upp mindre backuper manuellt genom nätverket. Med dessa lösningar har berörda tekniker tillgång till backuperna vart de än befinner sig så länge internetuppkoppling finns genom ett virtuellt privat nätverk (VPN) till företagets intranät/kontorsnät. Statkraft is the fourth largest electricity producer in Sweden and is fully owned by the Norwegian state. This thesis aims to develop a method for solving how Statkraft Sweden AB will store software backups of their local control systems. Currently there is no uniform method of storage for backups in the company and the problem to be solved in the thesis is how to store backups from multiple heterogeneous systems on a single storage platform. Based on the fact that the vast majority of help systems for configuring Programmable Logic Controllers (PLC) is based on Microsoft DOS / Windows, it is relatively simple to transfer the backups to a common platform. With older help systems it is also possible to virtualize these help systems on newer PC-based computers with for example VMware instances to avoid issues that can arise with older hardware. You can then archive the backups in ZIP-format that can be stored on a server, the advantage of using ZIP-archiving is to get a built-in integrity check of backups as ZIP has built in cyclic redundancy check (CRC) that uses checksums to check that the files are correct. Additionally, you get only one file in comparison to many files per backup if you do not archive in for example ZIP-format. The backups are then stored on a server within the company intranet / office network that is restricted to authorized personnel. The upload of the files can be done in several different ways; large backup files from PC-systems can be uploaded directly via the network, and the documentation is updated manually. Smaller and incremental backup files could however be uploaded through a web page on the Intranet, where documentation is automatically updated during upload. The storage space for both of these solutions is the same so that it is also possible to upload smaller backups manually through the network. With these solutions, the technicians can access the backups wherever they are as long as an Internet connection is available thru a virtual private network (VPN) Connection to the company’s intranet/office network.

Peer-reviewed Artículos técnicos con código fuente para ilustrar esencialmente el funcionamiento y las ideas que hacer funcionar los sistemas de compresión basados en estadística (Huffman) y combinatoria (Lempev-Ziv) sin entrar en detalles divulgativos, sólo tecnológicos. Articles tècnics amb codi font per il.lustrar essencialment el funcionament i les idees per fer funcionar els sistemes de compressió basats en estadística (Huffman) i combinatòria (Lempev-Ziv) sense entrar en detalls divulgatius, només tecnològics. Whitepaper with source code to illustrate the functionality and the ideas which make work the compression systems based on statistic (Huffman) and combinatory (Lempev-Ziv) without going into informative details, just technological.

Data compression is a vast subject with a lot of different algorithms. All algorithms are not good at every task and this thesis takes a closer look on compression of small files in the range of 100-300 bytes having in mind that the compressed output are to be sent over the Short Messaging System (SMS). Some well-known algorithms are tested for compression ratio and two of them, the Algorithm Λ, and the Adaptive Arithmetic Coding, are chosen to get a closer understanding of and then implement in the Java language. Those implementations are tested alongside the first tested implementations and one of the algorithms are chosen to answer the question ”Which compression algorithm is best suited for compression of data for use in Short Messaging System messages?”. Datakompression är ett brett område med ett stort antal olika algoritmer. Alla algoritmer är inte bra för alla tillfällen och denna rapport tittar i huvudsak på kompression av små filer i intervallet 100-300 byte tänkta att skickas komprimerade över SMS. Ett antal välkända algoritmers kompressionsgrad är testade och två av dem, Algorithm Λ och Adaptiv Aritmetisk Kodning, väljs ut och studeras närmre samt implementeras i Java. Dessa implementationer är sedan testade tillsammans med tidigare testade implementationer och en av algoritmerna väljs ut för att besvara frågan "Vilken kompressionsalgoritm är best lämpad för att komprimerad data för användning i SMS-meddelanden?".

Dans cette note, nous analysons l’entropie de mélange d’un système physique à l’équilibre par la théorie algorithmique de l’information. Nous montrons l’existence d’un isomorphisme entre cette entropie et la taille du programme informatique qui simule ce système physique. Cet isomorphisme doit être construit en respectant certaines règles, et le meilleur résultat est obtenu en combinant les algorithmes de compression RLE « run length encoding » et Huffman. Si le système physique est codé par la composition de ces deux isomorphismes basés sur le dénombrement des séquences identiques puis de leur codage en dictionnaire, nous pouvons quantifier l’entropie de systèmes binaires ou ternaires à l’état d’équilibre. De plus, il existe une relation affine entre l’énergie de simulation du système physique et l’énergie libre du système. It is shown that an isomorphism exists between the mixing entropy and the size of a computer program that simulates the physical system. This isomorphism must be constructed with respect to some theorems, and it is shown that the composition of two isomorphisms, one based on a run length encoding and another by encoding sequences in a dictionary allows us to quantify the entropy of binary and ternary systems at the equilibrium. Finally, it is shown that the energy consumed by a physical system encoded by this system and executed on a Turing machine is proportional to the free energy of the thermodynamic system.

International audience; It is shown that an isomorphism exists between the mixing entropy and the size of a computer program that simulates the physical system. This isomorphism must be constructed with respect to some theorems, and it is shown that the composition of two isomorphisms, one based on a run length encoding and another by encoding sequences in a dictionary allows us to quantify the entropy of binary and ternary systems at the equilibrium. Finally, it is shown that the energy consumed by a physical system encoded by this system and executed on a Turing machine is proportional to the free energy of the thermodynamic system.; Dans cette note, nous analysons l'entropie de mélange d'un système physique à l'équilibre par la théorie algorithmique de l'information. Nous montrons l'existence d'un isomorphisme entre cette entropie et la taille du programme informatique qui simule ce système physique. Cet isomorphisme doit être construit en respectant certaines règles, et le meilleur résultat est obtenu en combinant les algorithmes de compression RLE et Huffman. Si le système physique est codé par la composition de ces deux isomorphismes basés sur le dénombrement des séquences identiques puis de leur codage en dictionnaire, nous pouvons quantifier l’entropie de systèmes binaires ou ternaires à l’état d’équilibre. De plus, il existe une relation affine entre l’énergie de simulation du système physique et l’énergie libre du système.

As integrated circuits get smaller, faster and can fit more functionality, more problems arise with wire delays and cross-talk. Especially when using global clock signals distributed over a large chip area. This thesis will briefly discuss a solution to this problem using the Globally Asynchronous Locally Synchronous (GALS) design path. The goal of this thesis was to test the solution by modelling and partially implementing an MPEG-2 video decoder connected as a GALS system, using synchronous design tools. This includes design of the system in Simulink, implementing selected parts in VHDL and finally testing the connected parts on an FPGA. Presented in this thesis is the design and implementation of the system as well as theory on the MPEG-2 video decoding standard and a short analysis of the result.

International audience; Du point de vue informatique, un texte est formé par une suite de caractères alphanumériques ou séparateurs appartenant à un ensemble qui constitue l'alphabet du texte dont chaque élément est l'une des plus petites unités de base du texte. Les algorithmes de compression de textes les plus usuels sont fondés sur cette représentation du texte et son traitement caractère par caractère de type statistique.Une autre approche consiste à considérer le texte comme une suite alternée de mots appartenant à une langue naturelle donnée appelés mots linguistiques et de mots séparateurs constitués de la plus longue suite de caractères de ponctuation ou séparateurs situés entre deux mots linguistiques. Dans cette approche, on est amené à considérer deux alphabets (appelés lexiques ou dictionnaires) celui des mots linguistiques et celui des mots séparateurs. Le texte est alors vu comme suite alternée d'indices faisant référence à l'un ou l'autre de ces lexiques. Le texte comprimé est alors formé de trois formes comprimées, celles de chacun des lexiques et celle constituée par la suite d'indices des mots du texte représentés par le codage de Huffman.

This thesis describes the design of fast JPEG processing accelerators for a DSP processor. Certain computation tasks are moved from the DSP processor to hardware accelerators. The accelerators are slave co processing machines and are controlled via a new instruction set. The clock cycle and power consumption is reduced by utilizing the custom built hardware. The hardware can perform the tasks in fewer clock cycles and several tasks can run in parallel. This will reduce the total number of clock cycles needed. First a decoder and an encoder were implemented in DSP assembler. The cycle consumption of the parts was measured and from this the hardware/software partitioning was done. Behavioral models of the accelerators were then written in C++ and the assembly code was modified to work with the new hardware. Finally, the accelerators were implemented using Verilog. Extension of the accelerator instructions was given following a custom design flow.

This thesis describes the design of fast JPEG processing accelerators for a DSP processor. Certain computation tasks are moved from the DSP processor to hardware accelerators. The accelerators are slave co processing machines and are controlled via a new instruction set. The clock cycle and power consumption is reduced by utilizing the custom built hardware. The hardware can perform the tasks in fewer clock cycles and several tasks can run in parallel. This will reduce the total number of clock cycles needed. First a decoder and an encoder were implemented in DSP assembler. The cycle consumption of the parts was measured and from this the hardware/software partitioning was done. Behavioral models of the accelerators were then written in C++ and the assembly code was modified to work with the new hardware. Finally, the accelerators were implemented using Verilog. Extension of the accelerator instructions was given following a custom design flow.