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Search Home : Computers : Multimedia : Music and Audio : Audio Formats : MPEG-4
See Also:
- 3GPP SA4: This working `group` of the standardization organization deals with codecs like enhanced aacPlus or AMR-WB+ used in mobile telecommunication.
- 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.
- 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.
- Hydrogen Audio: Active forum topics in AAC - General and AAC - Tech as well as in MPEG4 Discussion.
- 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.
- MP4-SA Developer Tools: John Lazarro and John Wawrzynek from the CS Division, UC Berkeley provide tutorials, downloads, manuals and links related to the Structured Audio format.
- MPEG Audio: Official site of this MPEG subgroup with FAQs for the different standards, publicly available reference documents and software.
- MPEG LA: Patent pool administrator for the MPEG-4 Systems part of the standard including the MP4 file format.
- MPEG-4 Structured Audio: 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.
- MPEG4.net: Resource for news, information and products about MPEG-4, H.264, Windows Media, High-Definition, Streaming Media and related technologies.
- MPEG4.net Events: Upcoming MPEG-4 and Streaming Media related calendar of events.
- MPEG4.net News: The latest headlines about MPEG-4, Windows Media, Streaming Media and related technologies.
- MPEG4.net Press releases: Announcements of new products from companies or events from organizations related to MPEG-4 and other technologies.
- MPEG4.net Resources: New sources of information like web sites, documentation or tests for MPEG-4 and related technologies.
- 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.
- Mp4-tech: The web archive of the public MPEG Industry Forum mailing list with many knowledgeable participants from companies like FhG, Apple and Microsoft.
- Nokia developer forum: Platform to support the implementation of their software SDKs including AAC/MP4.
- QuickTime development: Apple offers technical FAQs, knowledge base and publicly available documentation files including the MOV file format.
- Roberto's listening tests: Provides public `group` comparisons of several AAC codecs and other formats at different bitrates.
- Ross Bencina Structured Audio: The writer of AudioMulch, free soundsynthesis software, offers a SAOL/SASL reference guide and decoder resources.
- Speech Synthesis Examples: Many TTS demos in several languages from different systems with links to their homepages.
- Structured Audio Open Group: 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.
- Telos Systems: Hardware manufacturer of the Zephyr ISDN codecs for radio and television broadcasters providing articles and brochures about different AAC implementations.
- Text-To-Speech Synthesis: Bell Labs' / Lucent Technologies multi-lingual TTS demos and introduction to this coding method.
- Tuner2: List of internet radio stations using aacPlus for their low bitrate streams, among them SomaFM.com and Boomer Radio.
- Via Licensing: Patent pool administrator for AAC with FAQs and overviews of royalty fees for commercial implementations.
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