Hi Sebastian,Thank you for the interest in the soundslimmer technology. The technology is based on principals of Sound Genome Theory (to obtain preliminary info you may simply Google phrase “Sound Genome Theory” or go directly to http://www.fidelityamplifier.com/Sound_Gen...ory_page_1.html. The theory was developed by a network of scientist which collaboration resulted in many advances in digital audio coding.If you interested in learning more about principals that SoundSlimmer is based on, we recommend you to evaluate another technology called “SX Fidelity Amplifier” we recently released, that is based on other principals of the Sound Genome Theory. It increases the quality of the decoded signal without increasing the original encoding bitrate. It operates in conjunction with any audio decoding process and provides a “restoration boost” to audio data and delivers a sound output that is similar to the one produced by a higher bitrate signal or a signal with a wider frequency spectrum. If you interested to download the evaluation version, it is located here:http://www.fidelityamplifier.com/evaluation.html As you correctly stated Huffman coding is not very efficient, so as a part of the theory advances, we have replaced it with our own proprietary method of coding. In addition to that current evaluation version of SoundSlimmer employs several other technologies including fractal based analysis for the MDCT prediction. The evaluation version supports MP3 format, and compression of MP3-Pro, AAC, HE-AAC, OGG, WMA, QMF, MPEG-4 audio can be custom built as required. The actual compression ratio depends on the bitrate of the original MP3 file and the actual sound structure of the compressed music.Both SoundSlimmer and SX Fidelity Amplifier are designed to be highly customizable and can be incorporated into any existing encoding-decoding scheme.Best Regards,SoundSlimmer support TeamQuote-----Original Message-----From: Sebastian MaresSent: Sunday, April 30, 2006 3:38 AMSubject: Technology UsedHello!I am just wondering how exactly you are achieving this additional compression. Is it something similar to that what lossless JPEG compressors use, i.e. replacing huffman coding with arithmetic coding and using prediction on MDCT data?Regards,Sebastian Mares
-----Original Message-----From: Sebastian MaresSent: Sunday, April 30, 2006 3:38 AMSubject: Technology UsedHello!I am just wondering how exactly you are achieving this additional compression. Is it something similar to that what lossless JPEG compressors use, i.e. replacing huffman coding with arithmetic coding and using prediction on MDCT data?Regards,Sebastian Mares
Lossless encoding already uses some of the techniques described here.
That's what you get when the marketing department answers your technical questions
Company has finished development of the first generation of its Sound Restoration Engine called "Radiant SoundT" that rebuilds fidelity of the digital audio. Now any stream that lost its original sound quality can be automatically processed via Radiant SoundT Engine and receive substantial sound quality improvement.
Look what for example WinRK, StuffIt, or PAQ can do with JPEGs.I wonder if soundslimer replaces noisless techniques used in MP3 encoding with its own ones (optimized more for compression ratio than speed) as Garf said, or maybe it is just optimized for squeezing the last bits from huffman-encoded bitstreams. Can someone try to rename some OggVorbis or AAC file to .mp3 and try to feed soundslimer with it?