Dd 2.0 Codec
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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 -
Dolby Atmos for the Home Theater
Dolby Atmos® for the Home Theater October 2014 Dolby Atmos®, the revolutionary cinema sound technology, has come to home theaters. With Dolby Atmos, content creators can precisely place and move sounds anywhere in your living room, including overhead, to make entertainment incredibly immersive and lifelike. This white paper is designed to explain how Dolby Atmos will work in home theaters and how you can build a Dolby Atmos enabled system or upgrade your existing system to support Dolby Atmos. This paper also explains the technological components of Dolby Atmos in home theater and the tools that content creators and broadcasters will use to create and deliver Dolby Atmos content to homes. Why replace channel-based surround sound? Dolby Atmos is a revolutionary technology that moves beyond the paradigm of channel- based audio, which has gone as far as it can in the home. Dolby has led home theater technology since the late 1980s, when we introduced four- channel Dolby® Pro Logic®. We led the development of 5.1 and then introduced 7.1 surround sound in the home and the cinema. But as home theater expanded to 9.1 and even 11.1 systems, the problems of pursuing more and more channels became clear. Home theater content often originates from theatrical content that is mixed, at best, in 7.1 sound and many times in 5.1. That meant that 9.1 or 11.1 systems reached a point of diminishing returns in parsing and upmixing that limited signal to serve more and more channels. In addition, the ability to recreate reality using channel-based audio is inherently limited. -
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. -
Centauri II Multichannel Audio Gateway Codec – a New Generation Conquers the Control-Room
Centauri II Multichannel Audio Gateway Codec conquers the Control-room.– a new generation New! D 6ms Latency D 5.1 / 7.1 Multichannel D Front-panel Hot Keys D Gateway Function D Backup Function D Twin/Quad Codec D ASI Most Audio-Codecs are specialists. The CENTAURI II simply enables you to do everything. An unbeatable range of features makes the CENTAURI II simpler, safer and more cost-effective to use than any other codec. The CENTAURI II is your universal Audio cover the entire range currently in general Considering the extensive system support Codec for every imaginable project. use. Including MPEG, AES Transparent it is clear that the CENTAURI II is an and APT – simultaneously! audio codec for all situations. Whether for There are no networks that can stop a By other manufacturers this would still be Broadcasting, for DVB-H or UMTS trans- CENTAURI II, whether ISDN or Ethernet, a legitimate question but by MAYAH this missions, to name but a few. has long been possible. X.21 or E1. There are no protocols that In light of so much technical sophistica- the CENTAURI II cannot understand. This Combinations of its many and versatile tion, it’s hardly surprising to learn that codec can be simply and easily integrated features permit a wide range of applica- the CENTAURI II is also the first audio into every imaginable IT infrastructure. tions; from Gateway, Backup Codec or codec to offer professional 5.1/7.1 multi- And its more than 15 coding algorithms Streaming-Server to Multichannel Codec. channel transmissions. -
See the Sound Philips Soundbar 2013 Our Heritage
See the sound Philips SoundBar 2013 Our heritage Our new levels of acoustic realism and authenticity date Each of our home cinema products is characterized by back to the launch of our fi rst sound product, the Philips unparalleled sound quality. All thanks to talented acoustic “Chapel” radio in 1931. Over the years, our dedication to engineering teams and special “Golden Ears” sound sonic perfection has inspired innovations that have forever specialists who are trained to detect every audio nuance and changed how the world hears and experiences sound. committed to creating an acoustic experience you will love. In addition to pioneering the fi rst ever shortwave transmitter, Today, our home cinema range runs the gamut of speaker we invented the cassette tape and CD and also introduced arrangements. The Immersive Sound has a traditional 5.1 the world’s fi rst Internet-connected micro Hi-Fi system. speaker setup for the sound purists. The 2.1 home cinema with two speakers and a subwoofer will fi ll your room with Our ingenuity continues to this day with not only the world’s a lifelike cinematic experience from fewer speakers. If space fi rst DVD/Blu-ray playback-integrated Soundbar, but also its is at a premium in your home, our sleek, unobtrusive, under- fi rst Surround on Demand system. the-TV Soundbars are your solution. Chapel Radio, 1931. This iconic radio set was nicknamed ‘The Little Chapel’. 3 Enhanced TV Sound As TVs become thinner and thinner, the sound from in-built speakers is growing steadily weaker. Keep it simple with Soundbar Choose your Soundbar Philips Soundbars give your movies, video games and music the powerful, high quality punch they deserve. -
Low Bit-Rate Speech Coding with Vq-Vae and a Wavenet Decoder
ICASSP 2019-2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 735-739. IEEE, 2019. DOI: 10.1109/ICASSP.2019.8683277. c 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. LOW BIT-RATE SPEECH CODING WITH VQ-VAE AND A WAVENET DECODER Cristina Garbaceaˆ 1,Aaron¨ van den Oord2, Yazhe Li2, Felicia S C Lim3, Alejandro Luebs3, Oriol Vinyals2, Thomas C Walters2 1University of Michigan, Ann Arbor, USA 2DeepMind, London, UK 3Google, San Francisco, USA ABSTRACT compute the true information rate of speech to be less than In order to efficiently transmit and store speech signals, 100 bps, yet current systems typically require a rate roughly speech codecs create a minimally redundant representation two orders of magnitude higher than this to produce good of the input signal which is then decoded at the receiver quality speech, suggesting that there is significant room for with the best possible perceptual quality. In this work we improvement in speech coding. demonstrate that a neural network architecture based on VQ- The WaveNet [8] text-to-speech model shows the power VAE with a WaveNet decoder can be used to perform very of learning from raw data to generate speech. Kleijn et al. [9] low bit-rate speech coding with high reconstruction qual- use a learned WaveNet decoder to produce audio comparable ity. -
Optimizing the Implementation of Dolby Digital Plus in Soc Designs
White Paper Optimizing the Implementation of Dolby Digital Plus in SoC Designs Chris Cavigioli and Brett Miller, MIPS Technologies Roger Dressler and Rob Hislop, Dolby Laboratories January 2007 MIPS Technologies and Dolby Laboratories have collaborated to provide a rapid and low-risk methodology for deploying Dolby Digital Plus technology to the set-top box and HD DVD/Blu-ray Disc markets. Introduction Dolby® Digital Plus, the newest generation of Dolby Digital, the standard-setting audio technology from Dolby Laboratories, is making its way into next-generation home entertainment applications, bringing superior sound quality, more efficient audio compression, and an improved user experience to the home. Dolby Digital Plus, also known as Enhanced AC-3 (E-AC-3), was developed to address the changing requirements of two burgeoning consumer markets. For the emerging HD DVD and Blu-ray Disc optical disc players, the data compression capabilities of Dolby Digital Plus allow movie studios to combine a superior audio experience with high-definition video. The technology also enhances the latest digital TV set-top boxes (STBs), enabling broadcasters to deploy offerings with lower bit rates, reducing costs and adding flexibility and value for consumers. While there are tremendous advantages to using Dolby Digital Plus, there are also design considerations that system-on-a-chip (SoC) teams need to understand. The rigorous approval testing that is required at Dolby Laboratories before a chip or a system can use the Dolby Digital Plus logo is substantial. Working with Dolby Laboratories, MIPS Technologies has developed an optimized, tested version of Dolby Digital Plus that will run on any of its 32-bit synthesizable processor cores—significantly slashing audio subsystem development time. -
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. -
Divx Plus HD Blu-Ray Disc/DVD Player
Pre-sales leaflet for United Kingdom (2016, August 4) Philips Blu-ray Disc/DVD player • DivX Plus HD • USB2.0 Media Link • DVD video upscaling BDP2930/05 Enjoy super-sharp movies in HD with RealMedia Video playback With BDP2930, movies never looked better. Incredibly sharp images in full HD 1080p are delivered from Blu-ray discs, while DVD upscaling offers near-HD video quality. Benefits See more Engage more • Blu-ray Disc playback for sharp images in full HD 1080p • EasyLink to control all HDMI CEC devices via a single remote • DVD video upscaling to 1080p via HDMI for near-HD images • BD-Live (Profile 2.0) to enjoy online Blu-ray bonus content • DivX Plus HD Certified for high-definition DivX playback • Enjoy all your movies and music from CDs and DVDs • 1080p at 24 fps for cinema-like images • USB 2.0 plays video/music from USB flash/hard disk drive • Subtitle Shift for widescreen without any missing subtitles Hear more • Dolby TrueHD for high fidelity sound Features Blu-ray Disc playback 1080p at 24 fps Blu-ray Discs have the capacity to carry high definition data, along with Bring a true cinema experience into your living room, with 24 frames-per- pictures in the 1920 x 1080 resolution that defines full high definition images. second video. Original films are all recorded at this frame rate, providing an Scenes come to life as details leap at you, movements smoothen and images ambience and image texture that is so unique. Philips Blu-ray Disc players are turn crystal clear. -
UMTS); LTE; Performance Characterization of the Adaptive Multi-Rate Wideband (AMR-WB) Speech Codec (3GPP TR 26.976 Version 10.0.0 Release 10)
ETSI TR 126 976 V10.0.0 (2011-04) Technical Report Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Performance characterization of the Adaptive Multi-Rate Wideband (AMR-WB) speech codec (3GPP TR 26.976 version 10.0.0 Release 10) 3GPP TR 26.976 version 10.0.0 Release 10 1 ETSI TR 126 976 V10.0.0 (2011-04) Reference RTR/TSGS-0426976va00 Keywords GSM, LTE, UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. -
3D Playback Divx Plus HD Blu-Ray Disc/DVD Player
Pre-sales leaflet for United Kingdom (2016, November 16) Blu-ray Disc/DVD player • 3D playback • DivX Plus HD • BD-Live BDP3480/05 Explore 3D cinematic experience Bring the magic of movies home in full High Definition with Blu-ray 3D and DivX Plus HD on this sleek player. Conveniently enjoy your favourite video and music files directly from USB flash drives or portable hard disks with USB 2.0. Benefits See more Engage more • Blu-ray 3D Disc playback for a full HD 3D experience at home • Turn your Smartphone into a remote for Philips AV products • DivX Plus HD Certified for high-definition DivX playback • USB 2.0 plays video/music from USB flash/hard disk drive • Access your favourite YouTube videos and Picasa photos easily • SimplyShare to connect and stream all entertainment wirelessly Hear more • Dolby TrueHD for high fidelity sound • Dolby Digital DTS2.0 for the ultimate movie experience Features Blu-ray 3D Disc playback MyRemote app Full HD 3D provides the illusion of depth for a heightened, realistic cinema The Philips MyRemote app lets you use your iPhone or iPod Touch or viewing experience at home. Separate images for the left and right eyes are Android Smartphone as a remote to control your Philips networked AV recorded in 1920 x 1080 full HD quality and alternately played on screen at a products. The app automatically recognises your* Philips Blu-ray player, Home high speed. By watching these images through special glasses that are timed to theatre or Streamium audio system connected to your home Wi-Fi network, open and close the left and right lenses in synchronisation with the alternating and gives you instant control over the devices from anywhere in your home. -
MP3 the MP3 Audio Format Lossy Data Compression. Audio Quality
Voice Data Voice data is something which is comprised of different wavelengths of sound. A simple exam can be found in an E.C.G Report of Heart. It has different wavelengths showing the Heartbeat. If you observe you will find that these wavelengths are of different height, which is basically indicating the Pitch of Sound Wave. Video Data Video data is a compilation of some Pixel or Vector based Images. A simple digital camera has an option of Multi Shot Mode. What happens in this mode is that a Picture is taken 10 to 15 times in a Sec. These images are then converted into a video. 1 Picture in this compilation will serve as 1 Frame. Now for a standard, Human Eye is capable of considering 30 Frames per second as a video. that means if 30 pictures are moved accross in front of human eye within a Second, it will turn into a video. A Simple example is an OLD Cinema House. In old days pictures, were used to entertain people in Cinema. Those pictures were moved across a projector with a speed of 30 FPS. Audio MP3 The MP3 audio format lossy data compression. Audio quality improves with increasing bitrate. 32 kbit/s - generally acceptable only for speech 96 kbit/s - generally used for speech or low-quality streaming 128 or 160 kbit/s – mid-range bitrate quality 192 kbit/s - a commonly used high-quality bitrate 320 kbit/s - highest level supported by MP3 standard Other audio 800 bit/s – minimum necessary for recognizable speech, using the special-purpose FS- 1015 speech codecs.