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MPEG-4
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MPEG-4 Standard (1)
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    Computers > Multimedia > Music and Audio > MIDI  (51)
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Web Pages
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  QuickTime development http://developer.apple.com/quicktime/
Apple offers technical FAQs, knowledge base and publicly available documentation files including the MOV file format.
  Fraunhofer IIS http://www.iis.fraunhofer.de/amm/techinf/mpeg4/audio.html
Information about the different parts of MPEG-4 Natural or General Audio (GA) from one of the inventors of these formats, see also their page about MPEG-2 AAC.
  Apple http://www.apple.com/quicktime/technologies/mpeg4/
Overview of their implementation and contribution to the MPEG-4 standard.
  Via Licensing http://www.vialicensing.com/
Patent pool administrator for AAC with FAQs and overviews of royalty fees for commercial implementations.
  Coding Technologies http://www.codingtechnologies.com/
Company that invented Spectral Band Replication (SBR) and combined it with MP3 (mp3PRO) and AAC (aacPlus or HE AAC).
  Digital Radio Mondiale http://www.drm.org/
DRM is a world-wide initiative to use analog AM radio for digital sound and services implementing aacPlus at very low bitrates, often mixed up with Digital Rights Management for copy protection.
  Nokia developer forum http://discussion.forum.nokia.com/forum/
Platform to support the implementation of their software SDKs including AAC/MP4.
  Hydrogen Audio http://www.hydrogenaudio.org/
Forum about audio coding in general with two separate boards for AAC.
  Tuner2 http://www.tuner2.com/
List of internet radio stations using aacPlus for their low bitrate streams, among them SomaFM.com and Boomer Radio.
  ISO/IEC http://standards.iso.org/ittf/PubliclyAvailableStandards/
Publicly available standards from the International Organization for Standardization including MPEG-4 with 14496-5 containing the Audio, Visual and Systems parts.
  3GPP SA4 http://www.3gpp.org/TB/SA/SA4/SA4.htm
This working group of the standardization organization deals with codecs like enhanced aacPlus or AMR-WB+ used in mobile telecommunication.
  Mobiledia http://www.mobiledia.com/
Reviews, articles and forum discussions about cell phones capable of AAC/MP4/3GP playback (also called "iTunes" format sometimes, use the site search).
  Roberto's listening tests http://www.rjamorim.com/test/
Provides public group comparisons of several AAC codecs and other formats at different bitrates.
  Mayah http://www.mayah.com/
Hard- and software company for professional broadcasting products with AAC/MP4 support.
  Introduction to Digital Audio Coding and Standards http://www.springer.com/east/home?SGWID=5-40109-22-33356358-0
Book by Marina Bosi and Richard E. Goldberg.
  MP4-SA Developer Tools http://www.cs.berkeley.edu/~lazzaro/sa/
John Lazarro and John Wawrzynek from the CS Division, UC Berkeley provide tutorials, downloads, manuals and links related to the Structured Audio format.
  Text-To-Speech Synthesis http://www.bell-labs.com/project/tts/
Bell Labs' / Lucent Technologies multi-lingual TTS demos and introduction to this coding method.
  MPEG4.net http://www.mpeg4.net/
Resource for news, information and products about MPEG-4, H.264, Windows Media, High-Definition, Streaming Media and related technologies.
  IBM Composite Media Group http://researchweb.watson.ibm.com/mpeg4/Projects/
Overview of their implementation and contribution to the MPEG-4 standard, especially for the Systems part.
  Principles of digital audio http://www.amazon.com/exec/obidos/ASIN/0071348190
Book by Ken C. Pohlmann.
  MPEG4.net Resources http://www.mpeg4.net/rss/mp4resource.xml
New sources of information like web sites, documentation or tests for MPEG-4 and related technologies.
  MPEG4.net Press releases http://www.mpeg4.net/rss/mp4press.xml
Announcements of new products from companies or events from organizations related to MPEG-4 and other technologies.
  MPEG4.net News http://www.mpeg4.net/rss/mp4news.xml
The latest headlines about MPEG-4, Windows Media, Streaming Media and related technologies.
  MPEG4.net Events http://www.mpeg4.net/rss/mp4events.xml
Upcoming MPEG-4 and Streaming Media related calendar of events.
  Speech Synthesis Examples http://www.ims.uni-stuttgart.de/~moehler/synthspeech/
Many TTS demos in several languages from different systems with links to their homepages.
  Applications of Digital Signal Processing to Audio and Acoustics http://www.amazon.com/exec/obidos/ASIN/0792381300
Book by Mark Kahrs and Karlheinz Brandenburg.
  Structured Audio Open Group http://lsiwww.epfl.ch/saog/
The main goal of the SAOG was to implement Structured Audio (SA) in open source applications offering a portal for their users with forum and downloads of samples and software.
  Audio Research Labs http://www.audioresearchlabs.com/
ARL is a commercial laboratory involved in subjective quality assessment methods like preparing and analyzing codec comparisons for 3GPP.
  Faac.sourceforge.net http://faac.sourceforge.net/oldsite/phorum/
The old Audiocoding.com forum is still available providing valuable content like FAAC compiling issues with its search tool.
  EE Times http://www.eet.com/story/OEG20011218S0048/
"Meeting MPEG-4 advanced audio coding requirements", knowledgeable article summarizing the most important properties of AAC for hardware playback.
  Machine Listening http://web.media.mit.edu/~tristan/Classes/MAS.945/technical.html
Reading list for an MIT seminar, most of the mentioned publications are directly available on their web server or linked to Amazon's book section.
  MPEG-4 Structured Audio http://sound.media.mit.edu/mpeg4/
Technical information and developer resources from the Machine Listening Group at the MIT Media Laboratory, the official homepage for this format maintained by Eric Scheirer.
  Doom9 http://forum.doom9.org/forumdisplay.php?forumid=11
Besides this forum for audio codecs there are others for container formats and video encoding in general with FAQs.
  Mp4-tech http://lists.mpegif.org/pipermail/mp4-tech/
The web archive of the public MPEG Industry Forum mailing list with many knowledgeable participants from companies like FhG, Apple and Microsoft.
  AES Publications http://www.aes.org/publications/
All available articles and documents from the Journal of Audio Engineering Society with search tool including a CD about coding artifacts.
  Hydrogen Audio http://www.hydrogenaudio.org/forums/ssi.php?a=out&f=13,14,44&show=20&type=rss
Active forum topics in AAC - General and AAC - Tech as well as in MPEG4 Discussion.
  Facial Animation http://www.research.att.com/projects/AnimatedHead/
AT&T Labs develops a computer human interface using 2D and 3D talking head-and-shoulder models driven by a Text-To-Speech synthesizer (TTS).
  Telos Systems http://www.telos-systems.com/techtalk/
Hardware manufacturer of the Zephyr ISDN codecs for radio and television broadcasters providing articles and brochures about different AAC implementations.
  MPEG LA http://www.mpegla.com/m4s/
Patent pool administrator for the MPEG-4 Systems part of the standard including the MP4 file format.

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