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 www.compression-links.info: Find, download & compress! 
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| Tutorials content, Audio area, MP3 area, NewsgroupPosts content, AAC area, Lossless_Audio_Coding area | It is a very good site to know about audio technology and ask your questions. The site is organized as a forum, it has comprehensive FAQ. Created: 11/02/2006 by Maxim Smirnov |
| Papers content, AAC area | An overview of the Coding Technologies' aacPlus audio codec. This article describes the principles of traditional audio coders and their limitations when used for low bit-rate applications. The second part describes the basic idea of SBR technology and demonstrates the improvements achieved through the combination of SBR technology with traditional audio coders such as AAC and MP3. Created: 31/01/2006 by Maxim Smirnov |
| SourceCode content, NonCommercialProgs content, AAC area | HomeBoy was a group of programers that created the first ISO compliant publicly available AAC encoder for Windows back in 1998. Also, they were reportedly creators of the first third party plugin for Winamp (their AAC input plugin), and the first ISO-compliant AAC decoder publicly available. The encoder is just a compile of the original ISO reference sources, therefore quality is bad. But, interestingly, streams created by it can still be played in modern decoders. Created: 31/01/2006 by Maxim Smirnov |
| Links content, AAC area | List of the MPEG-4 Audio software implementations from The Open Directory Project. Created: 31/01/2006 by Maxim Smirnov |
| Audio area, MPEG area, Video area, Standards content, AAC area |
The page of TSG SA WG4 working group of 3GPP. TSG SA WG4 (Codec) deals with the specifications for speech, audio, video, and multimedia codecs, in both circuit-switched and packet-switched environments. Other topics within the mandate of SA WG4 are: quality evaluation, end-to-end performance, and interoperability aspects with existing mobile and fixed networks (from codec point of view). The 3rd Generation Partnership Project (3GPP) is a collaboration agreement which brings together a number of telecommunications standards bodies. The original scope of 3GPP was to produce globally applicable Technical Specifications and Technical Reports for a 3rd Generation Mobile System based on evolved GSM core networks. Created: 31/01/2006 by Maxim Smirnov |
| Tutorials content, MP3 area, AAC area | By Karl-Heinz Brandenburg from Fraunhofer Institute for Integrated Circuits. The paper gives an introduction to audio compression for music file exchange. Beyond the basics the focus is on quality issues and the compression ratio / audio bandwidth / artifacts tradeoffs. Created: 31/01/2006 by Maxim Smirnov |
| Tutorials content, MP3 area, Standards content, NonCommercialProgs content, AAC area | The unofficial MPEG Audio page at University of Hannover. The page has news about MPEG Audio, overviews, a set of usefull links, MPEG Audio FAQ, MPEG-4 Audio standard drafts, some reference software. Created: 31/01/2006 by Maxim Smirnov |
| Tutorials content, AAC area | A white paper of Telos Systems. The AAC description is relatively detailed. Created: 31/01/2006 by Maxim Smirnov |
| Audio area, Papers content, BenchmarksTests content, AAC area | National Software Testing Labs (NSTL), employed by Microsoft, ran a proctored double-blind test that compared 64 kilobits per second (Kbps) WMA Pro (stereo) to the High Efficiency AAC Profile (HE AAC). The 12 segments of audio were presented by a proctor in a double-blind test to 300 individual listeners of both sexes and over a wide variety of ages. The paper states that 37% of the listeners preferred WMA Pro, 34% expressed identical preferences, and 29% preferred HE AAC. Created: 31/01/2006 by Maxim Smirnov |
| Tutorials content, AAC area | Another overview of AACPlus. Created: 31/01/2006 by Maxim Smirnov |
| Papers content, AAC area | Spectral Band Replication (SBR) white paper. Created: 31/01/2006 by Maxim Smirnov |
| CommercialLibs content, AAC area | Coding Technologies has developed the AACPlus. Coding Technologies' aacPlus v1 was standardized by MPEG as MPEG-4 HE AAC, combining AAC and SBR. With the addition of Parametric Stereo, aacPlus v2 is the state-of-the-art low bit rate open standards audio codec. The company offers Software Development Kits (SDK) for various platforms as well as Fixed-point Firmware Reference ANSI-C source code (FFR) packages are available through Coding Technologies and its partners. Coding Technologies also provides custom porting services, training, and development support. See product sheets section of the site for the overviews. Created: 31/01/2006 by Maxim Smirnov |
| Tutorials content, AAC area | Yet another brief overview of AAC. Created: 31/01/2006 by Maxim Smirnov |
| Links content, AAC area | Advanced Audio Coding page at MPEG.ORG. This page contains information and resources related specifically to AAC. It is a really good starting point to know about AAC. Created: 31/01/2006 by Maxim Smirnov |
| Tutorials content, AAC area | It's a nice explanation of advanced audio coding. Besides other things, it contains overview of MPEG-4 Low Delay Audio Coder (AAC-LD), comprehensible list of AAC's improvements over MP3, external links. Created: 31/01/2006 by Maxim Smirnov |
| Audio area, MP3 area, BenchmarksTests content, AAC area | The page contains comparative tables on general and technical information for a variety of audio codecs. There also links to some comparative tests. Created: 30/01/2006 by Maxim Smirnov |
| Video area, Companies content, MPEG-4_AVC_H264 area, AAC area | Ateme is a French company with a subsidiary in Canada. It is specialized in complex video and audio signal processing systems, both hardware and software. It offers MW9 and H.264 products for PC, Texas Instruments’ DSP, and FPGA. It has codecs for MPEG-4, MPEG-2, H.263, MP3, AAC, ADPCM, etc. It also offers emulators and development boards. Created: 08/11/2005 by Maxim Smirnov |
| MPEG area, Standards content, Papers content, Companies content, AAC area | An impressive set of links to papers, schedules, articles, and contacts for MPEG. Clearly the place to go for information relating to the standardization process. Created: 15/05/2004 by Mark Nelson |
| MPEG area, SourceCode content, AAC area | The MPEG-4 draft standard contains reference software from many sources for encoding and decoding audio and video. Created: 25/03/2001 by Mark Nelson |
| MPEG area, Papers content, Links content, AAC area | A big batch of pointers to various MPEG documents. Includes press releases and docs on MPEG-2, MPEG-4, MPEG-7, and AAC. Created: 14/11/1999 by Mark Nelson |
| MPEG area, SourceCode content, NonCommercialProgs content, NonCommercialLibs content, AAC area | AudioCoding.com's goal is to provide the community with free MPEG-4 audio codecs. Currently implemented are MPEG-2 and MPEG-4 AAC. The supported AAC profiles are HE, Main, LC, LTP and LD. It also supports all these profiles in their ER (Error Resilient) equivalent. Latest addition in the 2.0 version of the FAAD2 decoder library is the ability to decode HE AAC (High Efficiency) and PS AAC (Parametric Stereo) files. Created: 22/05/2004 by Mark Nelson |
| MPEG area, NonCommercialProgs content, AAC area |
The MPEG4IP project provides an MPEG and IETF standards-based system for encoding, streaming, and playing MPEG-4 encoded audio and video.
Version 1.1 is shipping as of May. 2004. Created: 22/05/2004 by Mark Nelson |
| CommercialLibs content, AAC area |
compaact! allows you to easily encode your audio files with the high quality coding algorithm MPEG-4 AAC (Advanced Audio Coding). compaact! is capable of multichannel encoding and comes with extensive audio preprocessing features to achieve even better encoding results.
Version 1.2 is shipping in April, 2004. Created: 11/04/2004 by Mark Nelson |
| Audio area, NonCommercialProgs content, AAC area | Decodes AC-3 audio from DVDs, or QuickTime audio, and spits back AIFF, MP3, or AAC files. Created: 04/04/2004 by Mark Nelson |
| Audio area, MP3 area, BenchmarksTests content, AAC area | Roberto Amorim is a familiar and friendly presence on the Hydrogen Audio board. This link points to the many audio compression listening tests he has conducted. These include evaluations of AAC and MP3 encoders at a rew different rates. Created: 14/02/2004 by Mark Nelson |
| Links content, AAC area | QuickTime 6 was an early adopter of MPEG-4 technology, and they seem to be big believers in the standard. This is in contrast to Microsoft's Windows Media 9, which uses proprietary codecs to compete with the open standards of MPEG-4. The MPEG-4 standard uses AAC for encoding audio, and Apple has a site with a few links and information about this audio encoder. Created: 23/04/2003 by Mark Nelson |
| Audio area, MP3 area, BenchmarksTests content, AAC area | This web site aims to provind blind quality testing of sound codecs. The range of tested codecs includes various MPEG-4 AAC, MPEG-1 Layer III, OggEnc, WMA, RealAudio. Created: 18/08/2002 by Mark Nelson |
| Audio area, MP3 area, Papers content, AAC area | A nice set of papers on audio coding. Includes goodies such as the ISO standards on MPEG-2 part 3 audio coding. Created: 07/08/2002 by Mark Nelson |
| Audio area, MP3 area, CommercialProgs content, AAC area, Lossless_Audio_Coding area | This conversion tool will convert between several audio formats, including MP3, WMA, WAV, OGG, APE, MPC, CUE, AAC, MP4, M4A, TTA, AC3, FLAC, OptimFROG, Speex, WavPack, ALAC. Does resampling. Supports ID3V1 and V2, plus other goodies. Created: 09/07/2002 by Mark Nelson |
| CommercialLibs content, NonCommercialLibs content, AAC area | A nice collection of AAC software, including encoders, decoders, and miscellaneous plugins. Created: 01/07/2002 by Mark Nelson |
| Tutorials content, AAC area | This article from EE Times talks about the changes made to the Advanced Audio Coding portion of the standard during the change from MPEG-2 to MPEG-4. Created: 27/12/2001 by Mark Nelson |
