Tuesday, August 12, 2008

GPL Violations

httP://www.gpl-violations.org

The gpl-violations.org project tries to raise public awareness about past and present infringing use(r)s of GPL licensed software.

MAD (MPEG Audio Decoder)

http://www.underbit.com/products/mad/

MAD is a high-quality MPEG audio decoder. It currently supports MPEG-1 and the MPEG-2 extension to lower sampling frequencies, as well as the de facto MPEG 2.5 format. All three audio layers — Layer I, Layer II, and Layer III (i.e. MP3) — are fully implemented.

MAD does not yet support MPEG-2 multichannel audio (although it should be backward compatible with such streams) nor does it currently support AAC.

ID3 v2

http://www.id3.org/

ID3 is a very popular audio file data tagging format in active use by software and hardware developers around the world. ID3 tags are supported in software such as iTunes, Windows Media Player, Winamp, YME, MusicMatch and hardware players like the iPod, Creative Zen, Toshiba Gigabeat and Sony Walkman.

An ID3 tag is a data container within an MP3 audio file stored in a prescribed format. This data commonly contains the Artist name, Song title, Year and Genre of the current audio file. This website contains the format standards information for the ID3 tagging data container. If you've read this far and are confused, check the ID3v2Easy page for a short, low-tech introduction.

HowStuffWorks.

http://www.howstuffworks.com/

Document Formats

Open Office XML format
- http://www.openxmlcommunity.org

Open Document format
- Implemented By OpenOffice.org office suite