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1. |
3GPP SA4
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This working group of the standardization organization deals with codecs like enhanced aacPlus or AMR-WB+ used in mobile telecommunication.
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2. |
AES Publications
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All available articles and documents from the Journal of Audio Engineering Society with search tool including a CD about coding artifacts.
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3. |
Apple
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Overview of their implementation and contribution to the MPEG-4 standard.
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4. |
Coding Technologies
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Company that invented Spectral Band Replication (SBR) and combined it with MP3 (mp3PRO) and AAC (aacPlus or HE AAC).
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5. |
Digital Radio Mondiale
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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.
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6. |
Doom9
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Besides this forum for audio codecs there are others for container formats and video encoding in general with FAQs.
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7. |
Everwicked.com
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Comprehensive guides about DivX, XviD and MPEG4IP, a forum and other resources about digital audio/video coding and streaming.
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8. |
Faac.sourceforge.net
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The old Audiocoding.com forum is still available providing valuable content like FAAC compiling issues with its search tool.
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9. |
Fraunhofer IIS
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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.
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10. |
Hydrogen Audio
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Forum about audio coding in general with two separate boards for AAC.
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11. |
Machine Listening
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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.
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12. |
Mayah
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Hard- and software company for professional broadcasting products with AAC/MP4 support.
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13. |
Mobiledia
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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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14. |
MP4-SA Developer Tools
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John Lazarro and John Wawrzynek from the CS Division, UC Berkeley provide tutorials, downloads, manuals and links related to the Structured Audio format.
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15. |
Mp4-tech
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The web archive of the public MPEG Industry Forum mailing list with many knowledgeable participants from companies like FhG, Apple and Microsoft.
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16. |
MPEG Audio
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Official site of this MPEG subgroup with FAQs for the different standards, publicly available reference documents and software.
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17. |
MPEG LA
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Patent pool administrator for the MPEG-4 Systems part of the standard including the MP4 file format.
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18. |
MPEG-4 Structured Audio
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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.
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19. |
MPEG4.net
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Resource for news, information and products about MPEG-4, H.264, Windows Media, High-Definition, Streaming Media and related technologies.
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20. |
Nokia developer forum
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Platform to support the implementation of their software SDKs including AAC/MP4.
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21. |
QuickTime development
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Apple offers technical FAQs, knowledge base and publicly available documentation files including the MOV file format.
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22. |
Roberto's listening tests
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Provides public group comparisons of several AAC codecs and other formats at different bitrates.
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23. |
Structured Audio Open Group
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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.
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24. |
Telos Systems
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Hardware manufacturer of the Zephyr ISDN codecs for radio and television broadcasters providing articles and brochures about different AAC implementations.
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25. |
Tuner2
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List of internet radio stations using aacPlus for their low bitrate streams, among them SomaFM.com and Boomer Radio.
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26. |
Via Licensing
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Patent pool administrator for AAC with FAQs and overviews of royalty fees for commercial implementations.
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27. |
Applications of Digital Signal Processing to Audio and Acoustics
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Book by Mark Kahrs and Karlheinz Brandenburg.
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28. |
Audio Research Labs
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ARL is a commercial laboratory involved in subjective quality assessment methods like preparing and analyzing codec comparisons for 3GPP.
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29. |
Audiocoding.com
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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.
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30. |
EE Times
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"Meeting MPEG-4 advanced audio coding requirements", knowledgeable article summarizing the most important properties of AAC for hardware playback.
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31. |
Facial Animation
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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).
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32. |
IBM Composite Media Group
NEW!
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Overview of their implementation and contribution to the MPEG-4 standard, especially for the Systems part.
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33. |
Introduction to Digital Audio Coding and Standards
NEW!
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Book by Marina Bosi and Richard E. Goldberg.
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34. |
ISO/IEC
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Publicly available standards from the International Organization for Standardization including MPEG-4 with 14496-5 containing the Audio, Visual and Systems parts.
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35. |
Principles of digital audio
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Book by Ken C. Pohlmann.
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36. |
Ross Bencina Structured Audio
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The writer of AudioMulch, free soundsynthesis software, offers a SAOL/SASL reference guide and decoder resources.
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37. |
Speech Synthesis Examples
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Many TTS demos in several languages from different systems with links to their homepages.
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38. |
Text-To-Speech Synthesis
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Bell Labs' / Lucent Technologies multi-lingual TTS demos and introduction to this coding method.
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