Coding and Compression
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Nova College-Wide Course Content Summary Ite 170 - Multimedia Software (3 Cr.)
Revised 8/2012 NOVA COLLEGE-WIDE COURSE CONTENT SUMMARY ITE 170 - MULTIMEDIA SOFTWARE (3 CR.) Course Description Explores technical fundamentals of creating multimedia projects with related hardware and software. Students will learn to manage resources required for multimedia production and evaluation and techniques for selection of graphics and multimedia software. Lecture 3 hours per week. General Purpose In this course students will learn the concepts, design and implementation of multimedia for the web. Students will create professional websites which incorporate images, sound, video and animation. The materials created will correspond to standards for Web accessibility and copyright issues. Course Prerequisites/Corequisites Prerequisite: ITE 115 Course Objectives Upon completion of this course, the student will be able to: a) Plan and organize a multimedia web site b) Understand the design concepts for creating a multimedia website c) Use a web authoring tool to create a multimedia web site d) Understand the design concepts related to creating and using graphics for the web e) Use graphics software to create and edit images for the web f) Understand the design concepts related to creating and using animation, audio and video for the web g) Use animation software to create and edit animations for the web h) Use software tools to publish and maintain a multimedia web site Major Topics to be Included Plan and organize a multimedia web site User characteristics and their effect upon design considerations Principles of good design -
Music 422 Project Report
Music 422 Project Report Jatin Chowdhury, Arda Sahiner, and Abhipray Sahoo October 10, 2020 1 Introduction We present an audio coder that seeks to improve upon traditional coding methods by implementing block switching, spectral band replication, and gain-shape quantization. Block switching improves on coding of transient sounds. Spectral band replication exploits low sensitivity of human hearing towards high frequencies. It fills in any missing coded high frequency content with information from the low frequencies. We chose to do gain-shape quantization in order to explicitly code the energy of each band, preserving the perceptually important spectral envelope more accurately. 2 Implementation 2.1 Block Switching Block switching, as introduced by Edler [1], allows the audio coder to adaptively change the size of the block being coded. Modern audio coders typically encode frequency lines obtained using the Modified Discrete Cosine Transform (MDCT). Using longer blocks for the MDCT allows forbet- ter spectral resolution, while shorter blocks have better time resolution, due to the time-frequency trade-off known as the Fourier uncertainty principle [2]. Due to their poor time resolution, using long MDCT blocks for an audio coder can result in “pre-echo” when the coder encodes transient sounds. Block switching allows the coder to use long MDCT blocks for normal signals being encoded and use shorter blocks for transient parts of the signal. In our coder, we implement the block switching algorithm introduced in [1]. This algorithm consists of four types of block windows: long, short, start, and stop. Long and short block windows are simple sine windows, as defined in [3]: (( ) ) 1 π w[n] = sin n + (1) 2 N where N is the length of the block. -
Free Lossless Image Format
FREE LOSSLESS IMAGE FORMAT Jon Sneyers and Pieter Wuille [email protected] [email protected] Cloudinary Blockstream ICIP 2016, September 26th DON’T WE HAVE ENOUGH IMAGE FORMATS ALREADY? • JPEG, PNG, GIF, WebP, JPEG 2000, JPEG XR, JPEG-LS, JBIG(2), APNG, MNG, BPG, TIFF, BMP, TGA, PCX, PBM/PGM/PPM, PAM, … • Obligatory XKCD comic: YES, BUT… • There are many kinds of images: photographs, medical images, diagrams, plots, maps, line art, paintings, comics, logos, game graphics, textures, rendered scenes, scanned documents, screenshots, … EVERYTHING SUCKS AT SOMETHING • None of the existing formats works well on all kinds of images. • JPEG / JP2 / JXR is great for photographs, but… • PNG / GIF is great for line art, but… • WebP: basically two totally different formats • Lossy WebP: somewhat better than (moz)JPEG • Lossless WebP: somewhat better than PNG • They are both .webp, but you still have to pick the format GOAL: ONE FORMAT THAT COMPRESSES ALL IMAGES WELL EXPERIMENTAL RESULTS Corpus Lossless formats JPEG* (bit depth) FLIF FLIF* WebP BPG PNG PNG* JP2* JXR JLS 100% 90% interlaced PNGs, we used OptiPNG [21]. For BPG we used [4] 8 1.002 1.000 1.234 1.318 1.480 2.108 1.253 1.676 1.242 1.054 0.302 the options -m 9 -e jctvc; for WebP we used -m 6 -q [4] 16 1.017 1.000 / / 1.414 1.502 1.012 2.011 1.111 / / 100. For the other formats we used default lossless options. [5] 8 1.032 1.000 1.099 1.163 1.429 1.664 1.097 1.248 1.500 1.017 0.302� [6] 8 1.003 1.000 1.040 1.081 1.282 1.441 1.074 1.168 1.225 0.980 0.263 Figure 4 shows the results; see [22] for more details. -
Image Compression, Comparison Between Discrete Cosine Transform and Fast Fourier Transform and the Problems Associated with DCT
Image Compression, Comparison between Discrete Cosine Transform and Fast Fourier Transform and the problems associated with DCT Imdad Ali Ismaili 1, Sander Ali Khowaja 2, Waseem Javed Soomro 3 1Institute of Information and Communication Technology, University of Sindh, Jamshoro, Sindh, Pakistan 2Institute of Information and Communication Technology, University of Sindh, Jamshoro, Sindh, Pakistan Abstract - The research article focuses on the Image much higher than the calculations mentioned above; this Compression techniques such as. Discrete Cosine Transform increases the bandwidth requirement of the channel which is (DCT) and Fast Fourier Transform (FFT). These techniques very costly. This is the challenging part for the researchers to are chosen because of their vast use in image processing field, transmit theses digital signals through limited bandwidth JPEG (Joint Photographic Experts Group) is one of the communication channel, most of the times the way is found to examples of compression technique which uses DCT. The overcome this obstacle but sometimes it is impossible to send Research compares the two compression techniques based on these digital signals in its raw form. Though there has been a DCT and FFT and compare their results using MATLAB revolution in the increased capacity and decreased cost of software, Graphical User Interface (GUI). These results are storage over the past years but the requirement of data storage based on two compression techniques with different rates of and data processing applications is growing explosively to out compression i.e. Compression rates are 90%, 60%, 30% and space this achievement.[8] 5%. The technique allows compressing any picture format to JPG format. -
Virtualization of Audio-Visual Services
Software Defined Media: Virtualization of Audio-Visual Services Manabu Tsukada∗, Keiko, Ogaway, Masahiro Ikedaz, Takuro Sonez, Kenta Niwax, Shoichiro Saitox, Takashi Kasuya{, Hideki Sunaharay, and Hiroshi Esaki∗ ∗ Graduate School of Information Science and Technology, The University of Tokyo Email: [email protected], [email protected] yGraduate School of Media Design, Keio University / Email: [email protected], [email protected] zYamaha Corporation / Email: fmasahiro.ikeda, [email protected] xNTT Media Intelligence Laboratories / Email: fniwa.kenta, [email protected] {Takenaka Corporation / Email: [email protected] Abstract—Internet-native audio-visual services are witnessing We believe that innovative applications will emerge from rapid development. Among these services, object-based audio- the fusion of object-based audio and video systems, including visual services are gaining importance. In 2014, we established new interactive education systems and public viewing systems. the Software Defined Media (SDM) consortium to target new research areas and markets involving object-based digital media In 2014, we established the Software Defined Media (SDM) 1 and Internet-by-design audio-visual environments. In this paper, consortium to target new research areas and markets involving we introduce the SDM architecture that virtualizes networked object-based digital media and Internet-by-design audio-visual audio-visual services along with the development of smart build- environments. We design SDM along with the development ings and smart cities using Internet of Things (IoT) devices of smart buildings and smart cities using Internet of Things and smart building facilities. Moreover, we design the SDM architecture as a layered architecture to promote the development (IoT) devices and smart building facilities. -
Network Requirements for High-Speed Real-Time Multimedia
NETWORK REQUIREMENTS FOR HIGH-SPEED REAL-TIME MULTIMEDIA DATA STREAMS Andrei Sukhov1), Prasad Calyam2), Warren Daly3), Alexander Iliin4) 1) Laboratory of Network Technologies, Samara Academy of Transport Engineering, Samara, Russia 2) Department of Electrical and Computer Engineering, Ohio State University, Ohio USA 4) HEANet Ltd, Dublin, Ireland 4) Russian Institute for Public Network, Moscow, Russia Abstract High-speed real-time multimedia applications such as Videoconferencing and HDTV have already become popular in many end-user communities. Developing better network protocols and systems that support such applications requires a sound understanding of the voice and video traffic characteristics and factors that ultimately affect end-user perception of audiovisual quality. In this paper we attempt to propose an analytical model for the various network factors whose interdependencies need to be modeled for characterizing end- user perception of audiovisual quality for high-speed real-time multimedia data streams. Towards validating our theory presented in this paper, we describe our initial results and future plans that consist of conducting a series of experiments and potential modifications to our proposed model. As the portion of middle and high-speed RTP (Real-Time Protocols) applications in the total communication over the Internet grows, it is important to understand the behavior of such traffic over the TCP/IP networks. The impetuous growth of traffic volumes and the rapid advances in the technologies of new-generation networks like IPv6 have made it possible for use of such high-speed applications, but with new demands on the network to deliver superior Quality of Service (QoS) to these applications. Our research focuses on the area of quality criteria for middle and high-speed network applications like • Video Conferencing / Streaming • Grid applications • P2P applications Audio- and Videoconferencing are two major multimedia communications that are defined by various international standards such as H.320, H.323 and SIP. -
Multimedia in Teacher Education: Perceptions & Uses
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by International Institute for Science, Technology and Education (IISTE): E-Journals Journal of Education and Practice www.iiste.org ISSN 2222-1735 (Paper) ISSN 2222-288X (Online) Vol 3, No 1, 2012 Multimedia in Teacher Education: Perceptions & Uses Gourav Mahajan* Sri Sai College of Education, Badhani, Pathankot,Punjab, India * E-mail of the corresponding author: [email protected] Abstract Educational systems around the world are under increasing pressure to use the new technologies to teach students the knowledge and skills they need in the 21st century. Education is at the confluence of powerful and rapidly shifting educational, technological and political forces that will shape the structure of educational systems across the globe for the remainder of this century. Many countries are engaged in a number of efforts to effect changes in the teaching/learning process to prepare students for an information and technology based society. Multimedia provide an array of powerful tools that may help in transforming the present isolated, teacher-centred and text-bound classrooms into rich, student-focused, interactive knowledge environments. The schools must embrace the new technologies and appropriate multimedia approach for learning. They must also move toward the goal of transforming the traditional paradigm of learning. Teacher education institutions may either assume a leadership role in the transformation of education or be left behind in the swirl of rapid technological change. For education to reap the full benefits of multimedia in learning, it is essential that pre-service and in-service teachers have basic skills and competencies required for using multimedia. -
DVD850 DVD Video Player with Jog/Shuttle Remote
DVD Video Player DVD850 DVD Video Player with Jog/Shuttle Remote • DVD-Video,Video CD, and Audio CD Compatible • Advanced DVD-Video technology, including 10-bit video DAC and 24-bit audio DAC • Dual-lens optical pickup for optimum signal readout from both CD and DVD • Built-in Dolby Digital™ audio decoder with delay and balance controls • Digital output for Dolby Digital™ (AC-3), DTS, and PCM • 6-channel analog output for Dolby Digital™, Dolby Pro Logic™, and stereo • Choice of up to 8 audio languages • Choice of up to 32 subtitle languages • 3-dimensional virtual surround sound • Multiangle • Digital zoom (play & still) DVD850RC Remote Control • Graphic bit rate display • Remote Locator™ DVD Video Player Feature Highlights: DVD850 Component Video Out In addition to supporting traditional TV formats, Philips Magnavox DVD Technical Specifications: supports the latest high resolution TVs. Component video output offers superb color purity, crisp color detail, and reduced color noise– Playback System surpassing even that of S-Video! Today’s DVD is already prepared to DVD Video work with tomorrow’s technology. Video CD CD Gold-Plated Digital Coaxial Cables DVD-R These gold-plated cables provide the clearest connection possible with TV Standard high data capacity delivering maximum transmission efficiency. Number of Lines : 525 Playback : NTSC/60Hz Digital Optical Video Format For optimum flexibility, DVD offers digital optical connection which deliv- Signal : Digital er better, more dynamic sound reproduction. Signal Handling : Components Digital Compression : MPEG2 for DVD Analog 6-Channel Built-in AC3 Decoder : MPEG1 for VCD Dolby® Digital Sound (AC3) gives you dynamic theater-quality sound DVD while sharply filtering coding noise and reducing data consumption. -
An Introduction to MPEG Transport Streams
An introduction to MPEG-TS all you should know before using TSDuck Version 8 Topics 2 • MPEG transport streams • packets, sections, tables, PES, demux • DVB SimulCrypt • architecture, synchronization, ECM, EMM, scrambling • Standards • MPEG, DVB, others Transport streams packets and packetization Standard key terms 4 • Service / Program • DVB term : service • MPEG term : program • TV channel (video and / or audio) • data service (software download, application data) • Transport stream • aka. « TS », « multiplex », « transponder » • continuous bitstream • modulated and transmitted using one given frequency • aggregate several services • Signalization • set of data structures in a transport stream • describes the structure of transport streams and services MPEG-2 transport stream 5 • Structure of MPEG-2 TS defined in ISO/IEC 13818-1 • One operator uses several TS • TS = synchronous stream of 188-byte TS packets • 4-byte header • optional « adaptation field », a kind of extended header • payload, up to 184 bytes • Multiplex of up to 8192 independent elementary streams (ES) • each ES is identified by a Packet Identifier (PID) • each TS packet belongs to a PID, 13-bit PID in packet header • smooth muxing is complex, demuxing is trivial • Two types of ES content • PES, Packetized Elementary Stream : audio, video, subtitles, teletext • sections : data structures Multiplex of elementary streams 6 • A transport stream is a multiplex of elementary streams • elementary stream = sequence of TS packets with same PID value in header • one set of elementary -
Implementing Object-Based Audio in Radio Broadcasting
Object-based Audio in Radio Broadcast Implementing Object-based audio in radio broadcasting Diplomarbeit Ausgeführt zum Zweck der Erlangung des akademischen Grades Dipl.-Ing. für technisch-wissenschaftliche Berufe am Masterstudiengang Digitale Medientechnologien and der Fachhochschule St. Pölten, Masterkalsse Audio Design von: Baran Vlad DM161567 Betreuer/in und Erstbegutachter/in: FH-Prof. Dipl.-Ing Franz Zotlöterer Zweitbegutacher/in:FH Lektor. Dipl.-Ing Stefan Lainer [Wien, 09.09.2019] I Ehrenwörtliche Erklärung Ich versichere, dass - ich diese Arbeit selbständig verfasst, andere als die angegebenen Quellen und Hilfsmittel nicht benutzt und mich auch sonst keiner unerlaubten Hilfe bedient habe. - ich dieses Thema bisher weder im Inland noch im Ausland einem Begutachter/einer Begutachterin zur Beurteilung oder in irgendeiner Form als Prüfungsarbeit vorgelegt habe. Diese Arbeit stimmt mit der vom Begutachter bzw. der Begutachterin beurteilten Arbeit überein. .................................................. ................................................ Ort, Datum Unterschrift II Kurzfassung Die Wissenschaft der objektbasierten Tonherstellung befasst sich mit einer neuen Art der Übermittlung von räumlichen Informationen, die sich von kanalbasierten Systemen wegbewegen, hin zu einem Ansatz, der Ton unabhängig von dem Gerät verarbeitet, auf dem es gerendert wird. Diese objektbasierten Systeme behandeln Tonelemente als Objekte, die mit Metadaten verknüpft sind, welche ihr Verhalten beschreiben. Bisher wurde diese Forschungen vorwiegend -
Quadtree Based JBIG Compression
Quadtree Based JBIG Compression B. Fowler R. Arps A. El Gamal D. Yang ISL, Stanford University, Stanford, CA 94305-4055 ffowler,arps,abbas,[email protected] Abstract A JBIG compliant, quadtree based, lossless image compression algorithm is describ ed. In terms of the numb er of arithmetic co ding op erations required to co de an image, this algorithm is signi cantly faster than previous JBIG algorithm variations. Based on this criterion, our algorithm achieves an average sp eed increase of more than 9 times with only a 5 decrease in compression when tested on the eight CCITT bi-level test images and compared against the basic non-progressive JBIG algorithm. The fastest JBIG variation that we know of, using \PRES" resolution reduction and progressive buildup, achieved an average sp eed increase of less than 6 times with a 7 decrease in compression, under the same conditions. 1 Intro duction In facsimile applications it is desirable to integrate a bilevel image sensor with loss- less compression on the same chip. Suchintegration would lower p ower consumption, improve reliability, and reduce system cost. To reap these b ene ts, however, the se- lection of the compression algorithm must takeinto consideration the implementation tradeo s intro duced byintegration. On the one hand, integration enhances the p os- sibility of parallelism which, if prop erly exploited, can sp eed up compression. On the other hand, the compression circuitry cannot b e to o complex b ecause of limitations on the available chip area. Moreover, most of the chip area on a bilevel image sensor must b e o ccupied by photo detectors, leaving only the edges for digital logic. -
BDP9100/05 Philips Blu-Ray Disc Player
Philips Blu-ray Disc player BDP9100 True cinema experience in 21:9 ultra-widescreen The perfect companion for the Cinema 21:9 TV. Unlike normal Blu-ray players, the BDP9100 is the only Blu-ray player allowing you to shift subtitles in the 21:9 screen aspect ratio, to retain the subtitles without the black bars. See more • 21:9 movie aspect ratio, no black bars bottom and top • Blu-ray Disc playback for sharp images in full HD 1080p • 1080p at 24 fps for cinema-like images • DVD video upscaling to 1080p via HDMI for near-HD images • DivX® Ultra for enhanced playback of DivX® media files • x.v.Colour brings more natural colours to HD camcorder videos Hear more • Dolby TrueHD and DTS-HD MA for HD 7.1 surround sound Engage more • BD-Live (Profile 2.0) to enjoy online Blu-ray bonus content • AVC HD to enjoy high definition camcorder recordings on DVD • Hi-Speed USB 2.0 Link plays video/music from USB flash drives • Enjoy all your movies and music from CDs and DVDs • EasyLink controls all EasyLink products with a single remote Blu-ray Disc player BDP9100/05 Highlights 21:9 movie aspect ratio BD-Live (Profile 2.0) resolution - ensuring more details and more true-to-life pictures. Progressive Scan (represented by "p" in "1080p') eliminates the line structure prevalent on TV screens, again ensuring relentlessly sharp images. To top it off, HDMI makes a direct digital connection that can carry uncompressed digital HD video as well as digital multi-channel audio, without conversions to analogue - delivering perfect picture and sound quality, completely free Be blown away by movies the way they are BD-Live opens up your world of high definition from noise.