<p>The effects of using limited precision floating point for intermediate storage in an embedded MP3 decoder are investigated in this thesis. The advantages of using limited precision is that the values need shorter word lengths and thus a smaller memory for storage. </p><p>The official reference decoder was modified so that the effects of different word lengths and algorithms could be examined. Finally, a software and hardware prototype was implemented that uses 16-bit wide memory for intermediate storage. The prototype is classified as a limited accuracy MP3 decoder. Only layer III is supported. The decoder could easily be extended to a full precision MP3 decoder if a corresponding increase in memory usage was accepted.</p>

<p>Denna rapport beskriver utvecklingen och skapandet av examensarbetet utfört på uppdrag av Destination Norrköping KB. Destination Norrköping KB är ett serviceföretag. Verksamheten kan sammanfattas i två huvuduppgifter - Marknadsföring och utveckling av Norrköping som besöksort samt försäljning, marknadsföring och utveckling av Louis De Geer konsert&kongress och Värmekyrkan. För att göra arbetet inom företaget effektivare skapades som examensarbete ett intranät och en cd-produktion, innehållande företagspresentation och frågesport, till företaget. Intranätet skulle användas i det vardagliga arbetet på företaget och cd- produktionen/frågesporten för att visa upp företagets bästa sida vid mässor och liknande evenemang. Frågesporten var tänkt som ett test på hur mycket betraktaren kan om staden Norrköping. Detta för att få fram företagets ständiga strävan att marknadsföra sin stad. </p><p>Intranätet är tidsenligt och följer Destination Norrköpings hemsidas struktur och uppbyggnad. På ett intresseväckande och övergripande sätt marknadsför och informerar företagspresentationen företaget, medan frågesporten roar och underhåller. </p><p>Materialet till både intranätet, cd-produktionen och frågesporten är hämtat hos Destination Norrköping KB och med hjälp av digitalkamera. Resultatet blev ett intranät som fungerar som en hjälpande hand i arbetet, och som har förenklat informationssökandet för personalen samt en cdproduktion som beskriver och visar upp företaget utåt. </p> / <p>Abstract This report describes the development and creativeness of examination result commisioned by Destination Norrköping KB. Destination Norrköping KB is a service company. Business and activities are based on two main tasks - marketing and development of Norrköping as a place to visit as well as marketing and development of Louis De Geer concert&congress and Värmekyrkan, (church). To achieve a better efficiency within the company a intranet and CD-production, including a company presentation and a quiz was created. The intranet is supposed to be used for the daily work and the CD-production to show the best from the company at exhibitions and simular events. The quiz is supposed to be a test to show how much the observer knows about the town Norrköping. </p><p>The intranet is up-to-date and are in line with "Destination Norrköpings" home- page and build-up structure. The company presentation will give a very interesting and overall wiew of the company while the quiz is more of a entertainment. </p><p>Main body of information for both the intranet, CD-production and the quiz, is based on information from "Destination Norrköping KB" as well as the use of a digital camera. The outcome is a friendly use intranet, working as a helping hand. It has even simplified the search of information for people involved as the CDproduction describes and show the company to the public.</p>

<p>Den här rapporten är en kartläggning av klustret Vetenskaplig och Medial visualiseringsteknik. Jag har på uppdrag av Näringslivskontoret i Norrköping och E.S.D.A i Linköping intervjuat ett antal företag som arbetar med visualiseringsteknik. Frågorna har bland annat rört företagens sysselsättning/produkt och framtida planer för verksamheten. De flesta företagen har vänt sig mot nöjesindustrin och då främst spelbranschen men en del har arbetat med vetenskaplig forskning med medicinsk inriktning. </p><p>Alla tror på en framtid med visualiseringstekniken även om den svenska marknaden för en del är för liten och samtliga har svarat att det finns gott om kompetent arbetskraft på området. Detta medför att de flesta ser positivt på det egna företagets möjligheter till att expandera och växa. </p><p>I slutet av rapporten finns mina egna tankar om hur jag tror att framtiden kommer att utvecklas. Jag tror att visualiseringstekniken är här för att stanna och att vi har sett långt ifrån alla möjligheter som tekniken innebär. Campus Norrköping har medfört att flera nya småföretag som sysslar med visualiseringsteknik har startats och förhoppningsvis kommer det i framtiden att medföra att stora delar av marknaden kommer att förflyttas hit till Norrköping vilket skulle vara mycket positivt för kommunens näringsliv.</p>

<p>This examination project is carried out for Waséns Traffic School in Linköping. The task was to develop a completely new windows application and a webpage that connects to the same MySQL database. The windows application (ATSV) is a program intended to carry out all the administrative tasks that a clerk at a traffic school may need: pupil management, reservations, billing and register functions. The applications was developed in C++ using Visual C++ from Microsoft. The connection to the MySQL database was made possible by using the class package MySQL++. On the webpage pupils are able to login and carry out reservations. The webpage is written in PHP. T</p><p>he result is a well functioning and versatile program that can carry out the tasks intended and a reservations system that pupil’s them selves can use from the Internet. In this essay the reader will get a detailed view of the steps that led to the end result.</p>

<p>Beacon AB has been producing Gobos for some time. A Gobo is a small round sheet used in projectors almost like a slide. It is used mostly in the commercial and entertainment business. Today these Gobos are created by using a film (also called mask). A digital exposure machine called LIOS has been developed to make it possible to create Gobos using direct exposure. This means a film will no longer be necessary and it will also make the process faster and cheaper. </p><p>To be able to use LIOS in the industry a lot of work still has to be done. An image is sent to the display in LIOS. This image comes from a computer connected to LIOS and at the end of the process it will be reproduced on the Gobo. This image can be modified before it is sent to LIOS so that a better result can be achieved in the end. The problem is that once the process is complete the image will be binary, which means halftoning is going to be used. The goal of the research described in this paper is first to test the properties of LIOS, second to create a halftoning method especially designed for those properties. </p><p>The resultof this thesis is an AM (Amplitude Modulated) method that uses a modified threshold matrix. Using this method would not give a satisfying result unless some of the distortions could be corrected somehow. This can however be done using a property available for the display in LIOS. The display can handle grayscales but since etching is used later in the process the final result will be a binary image (only black and white). This means that even though the image will be binary in the end, these grayscales can still be used to improve the result. The equipment that was available when this thesis was done was not fully developed why the grayscales are used to correct distortions. </p><p>The resulting method will most likely be good enough to produce Gobos with a satisfying quality. The method has never been used before and it introduces a new way of making corrections for halftoning. There are still some practical problems left to solve before LIOS can be used to reliably produce Gobos. Using better equipment can solve several of these problems but not all of them.</p>

<p>In the rapidly progressing evolution of technology, more and more emphasize is put on developing proper tools for the task of designing new and revolutionary systems. These tools are required in order to allow for a designer to fully utilize the power of new architectures and techniques. This thesis examines the current state of available scheduling tools for embedded systems, by evaluating and analyzing a number of di erent tools. An attempt is made to provide an overview of how the tools are constructed, and what types of methodology have been used.</p>

<p>This master thesis is as a final project in the Division of Computer Engineering at the Department of Electrical Engineering, Linköpings University, Sweden. </p><p>The purpose of the project is to design a wide frequency range programmable frequency divider used in a PLL circuit for ultra wide band system. 0.18 um tsmc CMOS technology is used in this project. </p><p>A brief introduction of PLL circuits and UWB specifications are given in the report and the circuit design issue is presented. Post-layout simulation results are shown in the later part of the report. </p><p>The focus of this project is to make the frequency divider work well in wide range and high speed. Therefore, how to shorten feedback circuits’ latency and how to reduce complexity of the circuits are the main problems. Logic gate merged technique is used to reduce transistor number and carefully drawing layout makes the circuit work well in post-layout simulation.</p>

<p>This thesis investigates the IEEE 802.11b standard that describes radio communication for networks. The standard is carefully explained and the limitations of the standard are presented. To put the system in its context and to study the effects from the frequency translation, surrounding areas such as radio propagation and networks in general are presented. For radio communications the carrier frequency gives the basic properties for the application, long distance communication uses low frequencies and the opposite for short-range communication. The report investigates the possibilities to translate the frequency for an IEEE 802.11b system to move the limits of IEEE 802.11b Three alternative solutions are compared. A final solution evolves from one of them. The resulting solution is based on existing hardware and is ready for testing. One major conclusion is that 802.11b is a well developed standard where the development of the hardware is focussed on the physical size. This miniaturization makes alteration more complex. Finally other interesting wireless techniques that could give the desired properties and other possible further work are presented.</p>

<p>As the volumes are entering the world of computer graphics the pure volume visualisation becomes a more important tool in for example research and medical applications. But the advance in haptics --- force feedback from the computer --- is behind. In volume haptics no equal to the proxy method so popular in surface haptics has yet emerged. Some implementations of volume haptics even use surfaces as intermediate representations so that surface haptics can be used.</p><p>The intention of this work was to create natural feeling haptic feedback from volumetric density data using pure volume haptics. The haptic algorithm would be implemented in Reachin API for the Reachin Desktop Display, together with other parts to build up a usable volume visualisation environment.</p><p>To achieve the feeling of stiffness and friction dependent on tissue type, a proxy based method was developed. In the volume the proxy is constrained by virtual surfaces defined by the local gradient. This algorithm was implemented in a volume haptics node and for visualisation a volume renderer node was implemented. These nodes can be used to setup different volume visualisation environments using VRML.</p>

<p>This thesis describes the design of a domain specific DSP processor. The thesis is divided into two parts. The first part gives some theoretical background, describes the different steps of the design process (both for DSP processors in general and for this project) and motivates the design decisions made for this processor. </p><p>The second part is a nearly complete design specification. </p><p>The intended use of the processor is as a platform for hardware acceleration units. Support for this has however not yet been implemented.</p>