AES Publications
All available articles and documents from the Journal of Audio Engineering Society with search tool including a CD about coding artifacts.
Apple
Overview of their implementation and contribution to the MPEG-4 standard.
Audio Research Labs
ARL is a commercial laboratory involved in subjective quality assessment methods like preparing and analyzing codec comparisons for 3GPP.
Audiocoding.com
The open source project FAAC includes an AAC encoder and decoder (FAAD2) with source code packages, developer mailing list, knowledge base, news section and user forum.
Coding Technologies
Company that invented Spectral Band Replication (SBR) and combined it with MP3 (mp3PRO) and AAC (aacPlus or HE AAC).
Digital Radio Mondiale
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.
Dissertation of Dr. Ye Wang
"Selected advances in audio compression and compressed domain processing", comprehensive overview of internet and mobile communication codecs and new methods for improvement. [PDF]
Doom9
Besides this forum for audio codecs there are others for container formats and video encoding in general with FAQs.
EE Times
"Meeting MPEG-4 advanced audio coding requirements", knowledgeable article summarizing the most important properties of AAC for hardware playback.
Everwicked.com
Comprehensive guides about DivX, XviD and MPEG4IP, a forum and other resources about digital audio/video coding and streaming.
Faac.sourceforge.net
The old Audiocoding.com forum is still available providing valuable content like FAAC compiling issues with its search tool.
Facial Animation
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).
Fraunhofer IIS
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.
3GPP SA4
This working group of the standardization organization deals with codecs like enhanced aacPlus or AMR-WB+ used in mobile telecommunication.
Hydrogen Audio
Forum about audio coding in general with two separate boards for AAC.
IBM Composite Media Group
Overview of their implementation and contribution to the MPEG-4 standard, especially for the Systems part.
ISO/IEC
Publicly available standards from the International Organization for Standardization including MPEG-4 with 14496-5 containing the Audio, Visual and Systems parts.
Machine Listening
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.
Mayah
Hard- and software company for professional broadcasting products with AAC/MP4 support.
Mobiledia
Reviews, articles and forum discussions about cell phones capable of AAC/MP4/3GP playback (also called "iTunes" format sometimes, use the site search).
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