Implementing Object-Based Audio in Radio Broadcasting
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An Introduction to Mpeg-4 Audio Lossless Coding
« ¬ AN INTRODUCTION TO MPEG-4 AUDIO LOSSLESS CODING Tilman Liebchen Technical University of Berlin ABSTRACT encoding process has to be perfectly reversible without loss of in- formation, several parts of both encoder and decoder have to be Lossless coding will become the latest extension of the MPEG-4 implemented in a deterministic way. audio standard. In response to a call for proposals, many com- The MPEG-4 ALS codec uses forward-adaptive Linear Pre- panies have submitted lossless audio codecs for evaluation. The dictive Coding (LPC) to reduce bit rates compared to PCM, leav- codec of the Technical University of Berlin was chosen as refer- ing the optimization entirely to the encoder. Thus, various encoder ence model for MPEG-4 Audio Lossless Coding (ALS), attaining implementations are possible, offering a certain range in terms of working draft status in July 2003. The encoder is based on linear efficiency and complexity. This section gives an overview of the prediction, which enables high compression even with moderate basic encoder and decoder functionality. complexity, while the corresponding decoder is straightforward. The paper describes the basic elements of the codec, points out 2.1. Encoder Overview envisaged applications, and gives an outline of the standardization process. The MPEG-4 ALS encoder (Figure 1) typically consists of these main building blocks: • 1. INTRODUCTION Buffer: Stores one audio frame. A frame is divided into blocks of samples, typically one for each channel. Lossless audio coding enables the compression of digital audio • Coefficients Estimation and Quantization: Estimates (and data without any loss in quality due to a perfect reconstruction quantizes) the optimum predictor coefficients for each of the original signal. -
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. -
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 -
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. -
Comprehensive Video/Audio Analysis to Reduce Debug Cycle
VEGA H264 Content Readiness - From Creation to Distribution Comprehensive Video/Audio Analysis to Reduce Debug Cycle New Addressing the needs of media professionals to debug and optimize digital video products, Interra’s Vega H264 provides detailed analysis of video and audio streams. • Multicore support for video Reducing development time and costs, and increasing productivity, Vega H264 enables media professionals to quickly bring to market high quality, standard-compliant digital video products. stream analysis Vega H264 is an ideal tool for media professionals who need to: • Hierarchial view of SVC Layers • Verify a stream’s compliance with the defined standard • Audio Video synchronization • Debug an encoded stream, or optimize a stream's buffer requirements check • Evaluate and compare the performance and quality of video compression/decompression • Additional standard support: tools - H.264 SVC, AVS, ISDB-T, Teletext, • Optimize and refine video compression CODEC Subtitles, Close Captions, PCAP, HDV, • Check interoperability issues MJPEG 2000, and more... Standards Supported Video H.264, H.264 SVC, H.263, H.263+, MPEG-4, MPEG-2, MPEG-1, AVS Key Product Benefits Audio AAC, Dolby AC-3, Dolby Digital Plus, AMR, MP3, PCM, LPCM, • Extensible architecture to support MPEG-1/MPEG-2 Audio other audio, video, and system System Streams MPEG-2 Transport, MPEG-2 Program/DVD VOB, QuickTime, formats MPEG-1 Systems, MP4, 3GPP/3GPP2, AVC, AVI, HDV • Powerful debug capabilities to Broadcast Standards ATSC, DVB, DVB-T/DVB-H, TR 101 290 Priority 1,2 -
Lossless Audio Coding Using Adaptive Linear Prediction
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by ScholarBank@NUS LOSSLESS AUDIO CODING USING ADAPTIVE LINEAR PREDICTION SU XIN RONG (B.Eng., SJTU, PRC) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING NATIONAL UNIVERSITY OF SINGAPORE 2005 ACKNOWLEDGEMENTS First of all, I would like to take this opportunity to express my deepest gratitude to my supervisor Dr. Huang Dong Yan from Institute for Infocomm Research for her continuous guidance and help, without which this thesis would not have been possible. I would also like to specially thank my supervisor Assistant Professor Nallanathan Arumugam from NUS for his continuous support and help. Finally, I would like to thank all the people who might help me during the project. ii TABLE OF CONTENTS ACKNOWLEDGEMENTS .............................................................................................. ii TABLE OF CONTENTS ................................................................................................. iii SUMMARY ........................................................................................................................vi LIST OF TABLES .......................................................................................................... viii LIST OF FIGURES ...........................................................................................................ix CHAPTER 1 INTRODUCTION......................................................................................................... -
HTS3450/77 Philips DVD Home Theater System with Video
Philips DVD home theater system with Video Upscaling up to 1080i DivX Ultra HTS3450 Turn up your experience with HDMI and video upscaling This stylish High Definition digital home entertainment system plays practically any disc in high quality Dolby and DTS multi-channel surround sound. So just relax and fully immerse yourself in movies and music at home. Great audio and video performance • HDMI digital output for easy connection with only one cable • Video Upscaling for improved resolution of up to 1080i • High definition JPEG playback for images in true resolution • DTS, Dolby Digital and Pro Logic II surround sound • Progressive Scan component video for optimized image quality Play it all • Movies: DVD, DVD+R/RW, DVD-R/RW, (S)VCD, DivX • Music: CD, MP3-CD, CD-R/RW & Windows Media™ Audio • DivX Ultra Certified for enhanced playback of DivX videos • Picture CD (JPEG) with music (MP3) playback Quick and easy set-up • Easy-fit™ connectors with color-coding for a simple set-up DVD home theater system with Video Upscaling up to 1080i HTS3450/77 DivX Ultra Highlights HDMI for simple AV connection High definition JPEG playback Progressive Scan HDMI stands for High Definition Multimedia High definition JPEG playback lets you view Progressive Scan doubles the vertical Interface. It is a direct digital connection that your pictures on your television in resolutions resolution of the image resulting in a noticeably can carry digital HD video as well as digital as high as two megapixels. Now you can view sharper picture. Instead of sending a field multichannel audio. By eliminating the your digital pictures in absolute clarity, without comprising the odd lines to the screen first, conversion to analog signals it delivers perfect loss of quality or detail - and share them with followed by the field with the even lines, both picture and sound quality, completely free friends and family in the comfort of your living fields are written at one time. -
Preview - Click Here to Buy the Full Publication
This is a preview - click here to buy the full publication IEC 62481-2 ® Edition 2.0 2013-09 INTERNATIONAL STANDARD colour inside Digital living network alliance (DLNA) home networked device interoperability guidelines – Part 2: DLNA media formats INTERNATIONAL ELECTROTECHNICAL COMMISSION PRICE CODE XH ICS 35.100.05; 35.110; 33.160 ISBN 978-2-8322-0937-0 Warning! Make sure that you obtained this publication from an authorized distributor. ® Registered trademark of the International Electrotechnical Commission This is a preview - click here to buy the full publication – 2 – 62481-2 © IEC:2013(E) CONTENTS FOREWORD ......................................................................................................................... 20 INTRODUCTION ................................................................................................................... 22 1 Scope ............................................................................................................................. 23 2 Normative references ..................................................................................................... 23 3 Terms, definitions and abbreviated terms ....................................................................... 30 3.1 Terms and definitions ............................................................................................ 30 3.2 Abbreviated terms ................................................................................................. 34 3.4 Conventions ......................................................................................................... -
Codifica Audio Lossless
UNIVERSITA` DEGLI STUDI DI PADOVA DIPARTIMENTO DI INGEGNERIA DELL’INFORMAZIONE Tesi di Laurea in INGEGNERIA DELL’INFORMAZIONE Codifica audio lossless Relatore Candidato Prof. Giancarlo Calvagno Mattia Bonomo Anno Accademico 2009/2010 UNIVERSITA` DEGLI STUDI DI PADOVA DIPARTIMENTO DI INGEGNERIA DELL’INFORMAZIONE Tesi di Laurea in INGEGNERIA DELL’INFORMAZIONE Codifica audio lossless Relatore Candidato Prof. Giancarlo Calvagno Mattia Bonomo Anno Accademico 2009/2010 Ai miei nonni. Indice Ringraziamenti 7 1 Introduzione 9 2 Principi della compressione lossless 13 2.1 Blocking e Framing ......................... 14 2.2 Interchannel decorrelation ..................... 17 2.3 Intrachannel decorrelation ..................... 19 2.4 Entropy Coding ........................... 26 3 Comparativa codec lossless 33 3.1 Standard MPEG .......................... 34 4 MPEG-4ALS 35 4.1 Blocking ............................... 36 4.2 Accesso casuale ........................... 36 4.3 Predizione .............................. 37 4.3.1 Predizione LPC ....................... 37 4.3.2 RLS-LMS .......................... 37 4.3.3 Predizione a lungo termine (LTP) ............. 41 4.4 Codifica Entropica ......................... 41 5 MPEG4-SLS 43 5.1 IntMCDT .............................. 44 5.1.1 Finestramento ........................ 45 5.1.2 DCT-IV ........................... 45 5.1.3 Modellazione del rumore .................. 46 5.2 Error Mapping ........................... 46 5 5.3 Codifica Entropica ......................... 48 5.3.1 Codifica Bit-Plane ..................... 48 5.3.2 Codifica a bassa energia .................. 51 6 Analisi sulle prestazioni di MPEG4-ALS 53 6.1 MPEG4-ALS ............................ 53 7 Parte sperimentale 57 7.1 Descrizione del progetto ...................... 57 7.1.1 Divisione in blocchi .................... 58 7.1.2 Inter-channel coding .................... 58 7.1.3 Algoritmo MEQP ...................... 59 7.1.4 Codifica entropica ..................... 60 7.1.5 Multiplexing ........................ 60 7.2 Simulazioni ............................ -
Lossless Compression of Audio Data
CHAPTER 12 Lossless Compression of Audio Data ROBERT C. MAHER OVERVIEW Lossless data compression of digital audio signals is useful when it is necessary to minimize the storage space or transmission bandwidth of audio data while still maintaining archival quality. Available techniques for lossless audio compression, or lossless audio packing, generally employ an adaptive waveform predictor with a variable-rate entropy coding of the residual, such as Huffman or Golomb-Rice coding. The amount of data compression can vary considerably from one audio waveform to another, but ratios of less than 3 are typical. Several freeware, shareware, and proprietary commercial lossless audio packing programs are available. 12.1 INTRODUCTION The Internet is increasingly being used as a means to deliver audio content to end-users for en tertainment, education, and commerce. It is clearly advantageous to minimize the time required to download an audio data file and the storage capacity required to hold it. Moreover, the expec tations of end-users with regard to signal quality, number of audio channels, meta-data such as song lyrics, and similar additional features provide incentives to compress the audio data. 12.1.1 Background In the past decade there have been significant breakthroughs in audio data compression using lossy perceptual coding [1]. These techniques lower the bit rate required to represent the signal by establishing perceptual error criteria, meaning that a model of human hearing perception is Copyright 2003. Elsevier Science (USA). 255 AU rights reserved. 256 PART III / APPLICATIONS used to guide the elimination of excess bits that can be either reconstructed (redundancy in the signal) orignored (inaudible components in the signal). -
Frequently Asked Questions Dolby Digital Plus
Frequently Asked Questions Dolby® Digital Plus redefines the home theater surround experience for new formats like high-definition video discs. What is Dolby Digital Plus? Dolby® Digital Plus is Dolby’s new-generation multichannel audio technology developed to enhance the premium experience of high-definition media. Built on industry-standard Dolby Digital technology, Dolby Digital Plus as implemented in Blu-ray Disc™ features more channels, less compression, and higher data rates for a warmer, richer, more compelling audio experience than you get from standard-definition DVDs. What other applications are there for Dolby Digital Plus? The advanced spectral coding efficiencies of Dolby Digital Plus enable content producers to deliver high-resolution multichannel soundtracks at lower bit rates than with Dolby Digital. This makes it ideal for emerging bandwidth-critical applications including cable, IPTV, IP streaming, and satellite (DBS) and terrestrial broadcast. Dolby Digital Plus is also a preferred medium for delivering BonusView (Profile 1.1) and BD-Live™ (Profile 2.0) interactive audio content on Blu-ray Disc. Delivering higher quality and more channels at higher bit rates, plus greater efficiency at lower bit rates, Dolby Digital Plus has the flexibility to fulfill the needs of new content delivery formats for years to come. Is Dolby Digital Plus content backward-compatible? Because Dolby Digital Plus is built on core Dolby Digital technologies, content that is encoded with Dolby Digital Plus is fully compatible with the millions of existing home theaters and playback systems worldwide equipped for Dolby Digital playback. Dolby Digital Plus soundtracks are easily converted to a 640 kbps Dolby Digital signal without decoding and reencoding, for output via S/PDIF.