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Mother guilty over Shannon kidnap

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Nasa delays its next Mars mission

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Bank cuts UK rates to 57-year low

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Send your video, pictures and story ideas

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news.bbc.co.uk

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No decision over Shields pardon

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Keane resigns as Sunderland boss

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 World Catalog > Computers > Multimedia > Music and Audio > Audio Formats > MPEG-4

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World Catalog > Computers > Multimedia > Music and Audio > Audio Formats > MPEG-4

MPEG-4:

AES Publications

All available articles and documents from the Journal of Audio Engineering Society with search tool including a CD about coding artifacts.

http://www.aes.org/publications/

Apple

Overview of their implementation and contribution to the MPEG-4 standard.

http://www.apple.com/quicktime/technologies/mpeg4/

Graand

Free Classified Ads Portal

www.graand.com

Applications of Digital Signal Processing to Audio and Acoustics

Book by Mark Kahrs and Karlheinz Brandenburg.

http://www.amazon.com/exec/obidos/ASIN/0792381300

Audio Research Labs

ARL is a commercial laboratory involved in subjective quality assessment methods like preparing and analyzing codec comparisons for 3GPP.

http://www.audioresearchlabs.com/

Coding Technologies

Company that invented Spectral Band Replication (SBR) and combined it with MP3 (mp3PRO) and AAC (aacPlus or HE AAC).

http://www.codingtechnologies.com/

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.

http://www.drm.org/

Doom9

Besides this forum for audio codecs there are others for container formats and video encoding in general with FAQs.

http://forum.doom9.org/forumdisplay.php?forumid=11

EE Times

"Meeting MPEG-4 advanced audio coding requirements", knowledgeable article summarizing the most important properties of AAC for hardware playback.

http://www.eet.com/story/OEG20011218S0048/

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).

http://www.research.att.com/projects/AnimatedHead/

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.

http://www.iis.fraunhofer.de/amm/techinf/mpeg4/audio.html

3GPP SA4

This working group of the standardization organization deals with codecs like enhanced aacPlus or AMR-WB+ used in mobile telecommunication.

http://www.3gpp.org/TB/SA/SA4/SA4.htm

Hydrogen Audio

Forum about audio coding in general with two separate boards for AAC.

http://www.hydrogenaudio.org/

IBM Composite Media Group

Overview of their implementation and contribution to the MPEG-4 standard, especially for the Systems part.

http://researchweb.watson.ibm.com/mpeg4/Projects/

Introduction to Digital Audio Coding and Standards

Book by Marina Bosi and Richard E. Goldberg.

http://www.springer.com/east/home?SGWID=5-40109-22-33356358-0

ISO/IEC

Publicly available standards from the International Organization for Standardization including MPEG-4 with 14496-5 containing the Audio, Visual and Systems parts.

http://standards.iso.org/ittf/PubliclyAvailableStandards/

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.

http://web.media.mit.edu/~tristan/Classes/MAS.945/technical.html

Mayah

Hard- and software company for professional broadcasting products with AAC/MP4 support.

http://www.mayah.com/

Mobiledia

Reviews, articles and forum discussions about cell phones capable of AAC/MP4/3GP playback (also called "iTunes" format sometimes, use the site search).

http://www.mobiledia.com/

MPEG LA

Patent pool administrator for the MPEG-4 Systems part of the standard including the MP4 file format.

http://www.mpegla.com/m4s/

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.

http://sound.media.mit.edu/mpeg4/

MPEG4.net

Resource for news, information and products about MPEG-4, H.264, Windows Media, High-Definition, Streaming Media and related technologies.

http://www.mpeg4.net/

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.

http://www.cs.berkeley.edu/~lazzaro/sa/

Mp4-tech

The web archive of the public MPEG Industry Forum mailing list with many knowledgeable participants from companies like FhG, Apple and Microsoft.

http://lists.mpegif.org/pipermail/mp4-tech/

Nokia developer forum

Platform to support the implementation of their software SDKs including AAC/MP4.

http://discussion.forum.nokia.com/forum/

Principles of digital audio

Book by Ken C. Pohlmann.

http://www.amazon.com/exec/obidos/ASIN/0071348190

QuickTime development

Apple offers technical FAQs, knowledge base and publicly available documentation files including the MOV file format.

http://developer.apple.com/quicktime/

Roberto's listening tests

Provides public group comparisons of several AAC codecs and other formats at different bitrates.

http://www.rjamorim.com/test/

Speech Synthesis Examples

Many TTS demos in several languages from different systems with links to their homepages.

http://www.ims.uni-stuttgart.de/~moehler/synthspeech/

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.

http://lsiwww.epfl.ch/saog/

Telos Systems

Hardware manufacturer of the Zephyr ISDN codecs for radio and television broadcasters providing articles and brochures about different AAC implementations.

http://www.telos-systems.com/techtalk/

Text-To-Speech Synthesis

Bell Labs' / Lucent Technologies multi-lingual TTS demos and introduction to this coding method.

http://www.bell-labs.com/project/tts/

Tuner2

List of internet radio stations using aacPlus for their low bitrate streams, among them SomaFM.com and Boomer Radio.

http://www.tuner2.com/

Via Licensing

Patent pool administrator for AAC with FAQs and overviews of royalty fees for commercial implementations.

http://www.vialicensing.com/

Hydrogen Audio

Active forum topics in AAC - General and AAC - Tech as well as in MPEG4 Discussion. [RSS]

http://www.hydrogenaudio.org/forums/ssi.php?a=out&f=13,14,44&show=20&type=rss

MPEG4.net Events

Upcoming MPEG-4 and Streaming Media related calendar of events. [RSS]

http://www.mpeg4.net/rss/mp4events.xml

MPEG4.net News

The latest headlines about MPEG-4, Windows Media, Streaming Media and related technologies. [RSS]

http://www.mpeg4.net/rss/mp4news.xml

MPEG4.net Press releases

Announcements of new products from companies or events from organizations related to MPEG-4 and other technologies. [RSS]

http://www.mpeg4.net/rss/mp4press.xml

MPEG4.net Resources

New sources of information like web sites, documentation or tests for MPEG-4 and related technologies. [RSS]

http://www.mpeg4.net/rss/mp4resource.xml

Send your video, pictures and story ideas

Have you got a good story? BBC News wants to hear from you.

news.bbc.co.uk

US Congresswoman hangs up on Obama

A US Congresswoman hangs up the phone on President-elect Barack Obama, thinking the call is a hoax.

news.bbc.co.uk

DNA database 'breached rights'

Keeping the DNA of two Britons with no convictions was a breach of their human rights, a European court rules.

news.bbc.co.uk

Nice smell...

But why else would anyone buy a new car these days?

news.bbc.co.uk

Smith accused of raid 'ignorance'

Jacqui Smith is attacked for not knowing a Tory MP was to be arrested, as her predecessor says she should have been told.

news.bbc.co.uk

Live text - Uefa Cup

Aston Villa target the last 32 of the Uefa Cup at home to Zilina as Portsmouth attempt to keep their qualification hopes alive at Wolfsburg.

news.bbc.co.uk

Jobs go at Troubles murder team

The special police team set up to investigate murders during the troubles is to make 75 staff redundant.

news.bbc.co.uk

Bank cuts UK rates to 57-year low

The Bank of England has cut interest rates by one percentage point from 3% to 2%, their lowest level since 1951.

news.bbc.co.uk

Mother guilty over Shannon kidnap

Shannon Matthews's mother and co-accused Michael Donovan are convicted of kidnapping the nine-year-old in a plot to claim a £50,000 reward.

news.bbc.co.uk

Kenya PM calls for Mugabe removal

Power-sharing in Zimbabwe is dead and Africa must unite to oust President Mugabe, says Kenya's prime minister.

news.bbc.co.uk

Nigeria 'child witch killer' held

A self-proclaimed "bishop" who claimed to have killed 110 child 'witches' is arrested in Nigeria.

news.bbc.co.uk

Lie detectors for benefit claims

Voice-recognition lie detectors are used by two Welsh councils in a bid to clamp down on people making false benefits claims.

news.bbc.co.uk

Keane resigns as Sunderland boss

Roy Keane stands down as Sunderland manager after 27 months in charge at the Stadium of Light.

news.bbc.co.uk

Interest rates

Which lenders are passing on the rate cuts to customers?

news.bbc.co.uk

Canada halts parliament amid row

Canadian PM Stephen Harper secures a suspension of parliament, saving him from defeat in a confidence vote.

news.bbc.co.uk

No decision over Shields pardon

The High Court reserves judgement in the case of jailed Liverpool fan Michael Shields, who has started a pardon bid.

news.bbc.co.uk

Pakistan dilemma

Relations with India strained in wake of the Mumbai attacks

news.bbc.co.uk

DNA dilemma

Will European ruling result in more unsolved crimes?

news.bbc.co.uk

Cash glow

How much does a street light cost for one night?

news.bbc.co.uk

Carmakers 'affect entire US economy'

The chairman of the Senate committee deciding whether to rescue the Detroit Three carmakers says the health of the entire US economy is at stake.

news.bbc.co.uk

Child protection review announced

The Scottish Government announces a wide-ranging review of guidance on child protection practices.

news.bbc.co.uk

Controversial Lapland theme park closes down

The firm running a Lapland-style theme park in the New Forest criticised by visitors as "hell" and a "scam" close it down.

news.bbc.co.uk

Menezes family's inquest protest

The family of Jean Charles de Menezes have walked out of the inquest into his death at the Oval Cricket Ground in London in protest.

news.bbc.co.uk

Nasa delays its next Mars mission

The US space agency (Nasa) has delayed the launch of its Mars Science Laboratory rover mission from 2009 to 2011.

news.bbc.co.uk

Your pictures

Readers' images of snowfalls across the UK

news.bbc.co.uk