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Peer-To-Peer Systems and Massively Multiplayer Online Games
Peer-to-Peer Systems and Massively Multiplayer Online Games Speaker: Jehn-Ruey Jiang CSIE Department National Central University P2P Systems Client/Server Architecture GET /index.html HTTP/1.0 HTTP/1.1 200 OK ... Server Clients 3/66 Peer-to-Peer Architecture Gateway Server Peers 4/66 The architectures Server-based architecture Client-Server / Server-Cluster Problems: Limited resources All loads are centered on the server Server-based architecture has low scalability. The setup and maintenance cost is high. Peer-to-Peer (P2P) architecture Advantages: Distributing loads to all users Users consume and provide resources P2P architecture has high scalability. The setup and maintenance cost is low. The Client Side Today‟s clients can perform more roles than just forwarding users requests Today‟s clients have: more computing power more storage space Thin client Fat client 6/66 Evolution at the Client Side DEC‟S VT100 IBM PC PC @ 4-core 4GHz @ 4.77MHz No storage 300GB HD 360k diskettes „70 „80 2008 7/66 What Else Has Changed? The number of home PCs is increasing rapidly Most of the PCs are “fat clients” As the Internet usage grow, more and more PCs are connecting to the global net Most of the time PCs are idle How can we use all this? Peer-to-Peer (P2P) 8/66 What is peer-to-peer (P2P)? “Peer-to-peer is a way of structuring distributed applications such that the individual nodes have symmetric roles. Rather than being divided into clients and servers each with quite distinct roles, in P2P applications a node may act as both -
Linux Sound Subsystem Documentation Release 4.13.0-Rc4+
Linux Sound Subsystem Documentation Release 4.13.0-rc4+ The kernel development community Sep 05, 2017 CONTENTS 1 ALSA Kernel API Documentation 1 1.1 The ALSA Driver API ............................................ 1 1.2 Writing an ALSA Driver ........................................... 89 2 Designs and Implementations 145 2.1 Standard ALSA Control Names ...................................... 145 2.2 ALSA PCM channel-mapping API ..................................... 147 2.3 ALSA Compress-Offload API ........................................ 149 2.4 ALSA PCM Timestamping ......................................... 152 2.5 ALSA Jack Controls ............................................. 155 2.6 Tracepoints in ALSA ............................................ 156 2.7 Proc Files of ALSA Drivers ......................................... 158 2.8 Notes on Power-Saving Mode ....................................... 161 2.9 Notes on Kernel OSS-Emulation ..................................... 161 2.10 OSS Sequencer Emulation on ALSA ................................... 165 3 ALSA SoC Layer 171 3.1 ALSA SoC Layer Overview ......................................... 171 3.2 ASoC Codec Class Driver ......................................... 172 3.3 ASoC Digital Audio Interface (DAI) .................................... 174 3.4 Dynamic Audio Power Management for Portable Devices ...................... 175 3.5 ASoC Platform Driver ............................................ 180 3.6 ASoC Machine Driver ............................................ 181 3.7 Audio Pops -
Biographies of Computer Scientists
1 Charles Babbage 26 December 1791 (London, UK) – 18 October 1871 (London, UK) Life and Times Charles Babbage was born into a wealthy family, and started his mathematics education very early. By . 1811, when he went to Trinity College, Cambridge, he found that he knew more mathematics then his professors. He moved to Peterhouse, Cambridge from where he graduated in 1814. However, rather than come second to his friend Herschel in the final examinations, Babbage decided not to compete for an honors degree. In 1815 he co-founded the Analytical Society dedicated to studying continental reforms of Newton's formulation of “The Calculus”. He was one of the founders of the Astronomical Society in 1820. In 1821 Babbage started work on his Difference Engine designed to accurately compile tables. Babbage received government funding to construct an actual machine, but they stopped the funding in 1832 when it became clear that its construction was running well over-budget George Schuetz completed a machine based on the design of the Difference Engine in 1854. On completing the design of the Difference Engine, Babbage started work on the Analytical Engine capable of more general symbolic manipulations. The design of the Analytical Engine was complete in 1856, but a complete machine would not be constructed for over a century. Babbage's interests were wide. It is claimed that he invented cow-catchers for railway engines, the uniform postal rate, a means of recognizing lighthouses. He was also interested in locks and ciphers. He was politically active and wrote many treatises. One of the more famous proposed the banning of street musicians. -
Audio Codec 120
Audio codec 120 click here to download Opus is a totally open, royalty-free, highly versatile audio codec. Opus is unmatched for interactive speech and music transmission over the Internet, but is also. Opus is a lossy audio coding format developed by the www.doorway.ru Foundation and standardized Opus supports constant and variable bitrate encoding from 6 kbit/ s to kbit/s, frame sizes from ms to ms, and five sampling rates from 8 . The RTP audio/video profile (RTP/AVP) is a profile for Real-time Transport Protocol (RTP) that specifies the technical parameters of audio and video streams. RTP specifies a general-purpose data format, but doesn't specify how. stereo audio codec (ADC and DAC) with single-ended Output Spectrum (– dB, N = ) f – Frequency – kHz. – – – – – – – 0. 0. The IETF Opus codec is a low-latency audio codec optimized for both voice and . in [RFC] can be any multiple of ms, up to a maximum of ms. IP Audio decoder with USB/Micro SD flash interface and serial port. Support of Internet Radio (AACplus, MP3, shoutcast, TCP streaming) and VoIP (SIP, RTP). V Mono Audio Codec with V Tolerant. Digital Interface . Transition Band. 5. kHz. Stop Band. kHz. Stop-Band Attenuation. dB. Group Delay. The SGTL is a low-power stereo codec is designed to provide a comprehensive audio solution for portable products that require line-in, mic-in, line-out. Opus has already been shown to out-perform other audio codecs at .. encoder now adds support for encoding packets of 80, , and Sonifex PS-PLAY IP to Audio Streaming Decoder Sonifex PS-SEND Audio to IP Streaming Encoder . -
Installation Manual
CX-20 Installation manual ENABLING BRIGHT OUTCOMES Barco NV Beneluxpark 21, 8500 Kortrijk, Belgium www.barco.com/en/support www.barco.com Registered office: Barco NV President Kennedypark 35, 8500 Kortrijk, Belgium www.barco.com/en/support www.barco.com Copyright © All rights reserved. No part of this document may be copied, reproduced or translated. It shall not otherwise be recorded, transmitted or stored in a retrieval system without the prior written consent of Barco. Trademarks Brand and product names mentioned in this manual may be trademarks, registered trademarks or copyrights of their respective holders. All brand and product names mentioned in this manual serve as comments or examples and are not to be understood as advertising for the products or their manufacturers. Trademarks USB Type-CTM and USB-CTM are trademarks of USB Implementers Forum. HDMI Trademark Notice The terms HDMI, HDMI High Definition Multimedia Interface, and the HDMI Logo are trademarks or registered trademarks of HDMI Licensing Administrator, Inc. Product Security Incident Response As a global technology leader, Barco is committed to deliver secure solutions and services to our customers, while protecting Barco’s intellectual property. When product security concerns are received, the product security incident response process will be triggered immediately. To address specific security concerns or to report security issues with Barco products, please inform us via contact details mentioned on https://www.barco.com/psirt. To protect our customers, Barco does not publically disclose or confirm security vulnerabilities until Barco has conducted an analysis of the product and issued fixes and/or mitigations. Patent protection Please refer to www.barco.com/about-barco/legal/patents Guarantee and Compensation Barco provides a guarantee relating to perfect manufacturing as part of the legally stipulated terms of guarantee. -
Ffmpeg Documentation Table of Contents
ffmpeg Documentation Table of Contents 1 Synopsis 2 Description 3 Detailed description 3.1 Filtering 3.1.1 Simple filtergraphs 3.1.2 Complex filtergraphs 3.2 Stream copy 4 Stream selection 5 Options 5.1 Stream specifiers 5.2 Generic options 5.3 AVOptions 5.4 Main options 5.5 Video Options 5.6 Advanced Video options 5.7 Audio Options 5.8 Advanced Audio options 5.9 Subtitle options 5.10 Advanced Subtitle options 5.11 Advanced options 5.12 Preset files 6 Tips 7 Examples 7.1 Preset files 7.2 Video and Audio grabbing 7.3 X11 grabbing 7.4 Video and Audio file format conversion 8 Syntax 8.1 Quoting and escaping 8.1.1 Examples 8.2 Date 8.3 Time duration 8.3.1 Examples 8.4 Video size 8.5 Video rate 8.6 Ratio 8.7 Color 8.8 Channel Layout 9 Expression Evaluation 10 OpenCL Options 11 Codec Options 12 Decoders 13 Video Decoders 13.1 rawvideo 13.1.1 Options 14 Audio Decoders 14.1 ac3 14.1.1 AC-3 Decoder Options 14.2 ffwavesynth 14.3 libcelt 14.4 libgsm 14.5 libilbc 14.5.1 Options 14.6 libopencore-amrnb 14.7 libopencore-amrwb 14.8 libopus 15 Subtitles Decoders 15.1 dvdsub 15.1.1 Options 15.2 libzvbi-teletext 15.2.1 Options 16 Encoders 17 Audio Encoders 17.1 aac 17.1.1 Options 17.2 ac3 and ac3_fixed 17.2.1 AC-3 Metadata 17.2.1.1 Metadata Control Options 17.2.1.2 Downmix Levels 17.2.1.3 Audio Production Information 17.2.1.4 Other Metadata Options 17.2.2 Extended Bitstream Information 17.2.2.1 Extended Bitstream Information - Part 1 17.2.2.2 Extended Bitstream Information - Part 2 17.2.3 Other AC-3 Encoding Options 17.2.4 Floating-Point-Only AC-3 Encoding -
Convention Program
AAEESS 112244tthh CCOONNVVEENNTTIIOONN PPRROOGGRRAAMM May 17 – 20, 2008 RAI International Exhibition & Congress Centre, Amsterdam The AES has launched a new opportunity to recognize 1University of Salford, Salford, Greater student members who author technical papers. The Stu- Manchester, UK dent Paper Award Competition is based on the preprint 2ICW, Ltd., Wrexham, Wales, UK manuscripts accepted for the AES convention. Forty-two student-authored papers were nominated. This paper gives an account of work carried out The excellent quality of the submissions has made the to assess the effects of metallized film selection process both challenging and exhilarating. polypropylene crossover capacitors on key sonic The award-winning student paper will be honored dur- attributes of reproduced sound. The capacitors ing the convention, and the student-authored manuscript under investigation were found to be mechani- will be published in a timely manner in the Journal of the cally resonant within the audio frequency band, Audio Engineering Society. and results obtained from subjective listening Nominees for the Student Paper Award were required tests have shown this to have a measurable to meet the following qualifications: effect on audio delivery. The listening test methodology employed in this study evolved (a) The paper was accepted for presentation at the from initial ABX type tests with set program AES 124th Convention. material to the final A/B tests where trained test (b) The first author was a student when the work was subjects used program material that they were conducted and the manuscript prepared. familiar with. The main findings were that (c) The student author’s affiliation listed in the manu- capacitors used in crossover circuitry can exhibit script is an accredited educational institution. -
Audio Codecs
Audio Codecs [ AoIP | Leased Line | E1 ] Release date: July 2019 All rights reserved. Permission to reprint or electronically reproduce any document or graphic in whole or in part for any reason is prohibited unless prior written consent is obtained from AVT Audio Video Technolo- gies GmbH. This catalogue has been put together with the utmost digilence. However, no guar- antee for correctness can be given. AVT Audio Video Technologies GmbH cannot be held responsible for any misleading or incorrect information provided throughout this catalogue. AVT Audio Video Technologies GmbH re- serves the right to change specifications at any time without notice. CONTENT General 5 Features & Symbols 6 Overview 8 ISDN + VoIP ● MAGIC D7 XIP & MAGIC DC7 XIP RM Audio Codecs 10 ○ Application: Audio contribution 12 ISDN + AoIP ● MAGIC AC1 XIP & MAGIC AC1 XIP RM Audio Codecs 14 ○ Application: Audio contribution 16 E1 + AoIP ● MAGIC ACip3 & MAGIC ACip3 2M Audio Codecs 18 ○ Application: Audio contribution 20 ○ Application: AoIP distribution 22 ● MAGIC ACip3 (2M) ModNet System 24 ○ Application: Studio-Transmitter-Links 26 Audio Codec Integration ● MAGIC THipPro ACconnect 28 System Manager Upgrade 30 General Audio Codecs are needed for high-quality bitrate, the desired quality and the accept- Audio transmissions over different networks able delay. The EBU names the following Au- like IP, ISDN, 2-Mbit/s (E1) and X.21. Over IP dio algorithms as mandatory to comply with and ISDN, both Leased Line connections as the AoIP standard. G.711, G.722, ISO/MPEG well as temporary dial-up connections can Layer 2 and PCM (for stationary Audio Co- be used. -
The Book of Audacity
THE BOOK OF AUDACITY Record, Edit, Mix, and Master with the Free Audio Editor by Carla Schroder San Francisco THE BOOK OF AUDACITY. Copyright © 2011 by Carla Schroder. All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage or retrieval system, without the prior written permission of the copyright owner and the publisher. 15 14 13 12 11 1 2 3 4 5 6 7 8 9 ISBN-10: 1-59327-270-7 ISBN-13: 978-1-59327-270-8 Publisher: William Pollock Production Editor: Serena Yang Cover and Interior Design: Octopod Studios Developmental Editor: Tyler Ortman Technical Reviewer: Alvin Goats Copyeditor: Kim Wimpsett Compositor: Serena Yang Proofreader: Paula L. Fleming Indexer: Nancy Guenther For information on book distributors or translations, please contact No Starch Press, Inc. directly: No Starch Press, Inc. 38 Ringold Street, San Francisco, CA 94103 phone: 415.863.9900; fax: 415.863.9950; [email protected]; www.nostarch.com Library of Congress Cataloging-in-Publication Data Schroder, Carla. The book of Audacity : record, edit, mix, and master with the free audio editor / by Carla Schroder. p. cm. Includes bibliographical references. ISBN-13: 978-1-59327-270-8 ISBN-10: 1-59327-270-7 1. Audacity (Computer file) 2. Digital audio editors. I. Title. ML74.4.A84S37 2010 781.3’4536-dc22 2010037594 No Starch Press and the No Starch Press logo are registered trademarks of No Starch Press, Inc. Other product and company names mentioned herein may be the trademarks of their respective owners. -
Zvukový Formát Mp3
UNIVERZITA PARDUBICE DOPRAVNÍ FAKULTA JANA PERNERA KATEDRA ELEKTROTECHNIKY, ELEKTRONIKY A ZABEZPEČOVACÍ TECHNIKY V DOPRAVĚ ZVUKOVÝ FORMÁT MP3 BAKALÁŘSKÁ PRÁCE AUTOR PRÁCE: Petr Gregar VEDOUCÍ PRÁCE: RNDr. Jan Hula 2007 UNIVERZITY OF PARDUBICE JAN PERNER TRAFFIC FACULTY DEPARTMENT OF ELECTRICAL AND ELECTRONICAL ENGINEERING AND SIGNALLING IN TRANSPORT SOUND FORMAT MP3 BACHELOR WORK AUTOR: Petr Gregar SUPERVIZOR: RNDr. Jan Hula 2007 PROHLÁŠENÍ Tuto práci jsem vypracoval samostatně. Veškeré literární prameny a informace, které jsem v práci využil, jsou uvedeny v seznamu použité literatury. Byl jsem seznámen s tím, že se na moji práci vztahují práva a povinnosti vyplývající ze zákona č. 121/2000 Sb., autorský zákon, zejména se skutečností, že Univerzita Pardubice má právo na uzavření licenční smlouvy o užití této práce jako školního díla podle § 60 odst. 1 autorského zákona, a s tím, že pokud dojde k užití této práce mnou nebo bude poskytnuta licence o užití jinému subjektu, je Univerzita Pardubice oprávněna ode mne požadovat přiměřený příspěvek na úhradu nákladů, které na vytvoření díla vynaložila, a to podle okolností až do jejich skutečné výše. Souhlasím s prezenčním zpřístupněním své práce v Univerzitní knihovně Univerzity Pardubice. V Pardubicích dne 8. 5. 2007 …..…………………………… Petr Grgear SOUHRN Bakalářská práce se zabývá popisem kódování digitálně uložených zvukových dat podle standardu MPEG – 1 Layer III (MP3) a strukturou takto vytvořeného souboru. V úvodní části jsou popsány základní pojmy jako zvuk, vnímání zvuků lidským uchem, způsob záznamu zvuku v číslicové formě či princip reprodukce zvuku. Druhá část se věnuje historii formátu od počátků jeho vývoje až do současnosti. Následuje vlastní popis standardu MP3. Významnou výhodou formátu MP3 jsou i tzv. -
Downloads PC Christophe Fantoni Downloads PC Tous Les Fichiers
Downloads PC Christophe Fantoni Downloads PC Tous les fichiers DirectX 8.1 pour Windows 9X/Me Indispensable au bon fonctionnement de certain programme. Il vaut mieux que DirectX soit installé sur votre machine. Voici la version française destinée au Windows 95, 98 et Millenium. Existe aussi pour Windows NT et Windows 2000. http://www.christophefantoni.com/fichier_pc.php?id=46 DirectX 8.1 pour Windows NT/2000 Indispensable au bon fonctionnement de certain programme. Il vaut mieux que DirectX soit installé sur votre machine. Voici la version française destinée à Windows Nt et Windows 2000. Existe aussi pour Windows 95, 98 et Millenium. http://www.christophefantoni.com/fichier_pc.php?id=47 Aspi Check Permet de connaitre la présence d'unc couche ASPI ainsi que le numéro de version de cette couche éventuellement présente sur votre système. Indispensable. http://www.christophefantoni.com/fichier_pc.php?id=49 Aspi 4.60 Ce logiciel freeware permet d'installer une couche ASPI (la 4.60) sur votre système d'exploitation. Attention, en cas de problème d'installation de cette version originale, une autre version de cette couche logiciel est également présente sur le site. De plus, Windows XP possede sa propre version de cette couche Aspi, version que vous trouverez également en télécharegement sur le site. Absolument indispensable. http://www.christophefantoni.com/fichier_pc.php?id=50 DVD2AVI 1.76 Fr Voici la toute première version du meilleur serveur d'image existant sur PC. Version auto-installable, en français, livré avec son manuel, également en français. Le tout à été traduit ou rédigé par mes soins.. -
Isma Internet Streaming Media Alliance
ISMA INTERNET STREAMING MEDIA ALLIANCE Output Document Number TD00105 November 2007 TITLE: ISMA Ultravox Part 2: Ultravox 3.0 Protocol Specification Status: Provisional Specification © 2007 ISMA12/14/2007ISMA Ultravox Part 2: Ultravox 3 Protocol Provisional Specification 1 Table of Contents Abstract...........................................................................................................................3 1 Ultravox Protocol.........................................................................................................4 1.1 Overview...............................................................................................................4 1.2 Ultravox Frames....................................................................................................4 1.3 Encrypted Messages (Payload for any classes 3-15)...............................................5 2 Ultravox Broadcaster Protocol......................................................................................6 2.1 POST Headers.......................................................................................................6 2.1.1 Required Headers............................................................................................7 2.1.2 Optional Arguments........................................................................................7 2.2 Response Codes.....................................................................................................7 2.3 Response Headers..................................................................................................8