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windows default iconOptimFROG Publisher's description

OptimFROG is a lossless audio compression program.

OptimFROG is a lossless audio compression program. Its main goal is to reduce at maximum the size of audio files, while permitting bit identical restoration for all input. It is similar with the ZIP compression, but it is highly specialized to compress audio data.

OptimFROG obtains asymptotically the best lossless audio compression ratios. It has Windows, Linux, and Mac versions, fully featured input plug-ins for the Windows Media Player, foobar2000, Winamp2/3/5, dBpowerAMP, XMPlay, QCD, and XMMS audio players (with bitstream error resilience, ID3v1.1 and APEv2 read tagging support, ID3v2 compatible), optimal support for all integer PCM wave formats up to 32 bits and an extensible streamable (error tolerant) compressed format. It is also fast, the default mode encodes CD quality audio data at 12.4x real-time and decodes at 17.4x real-time on AMD Athlon XP 1800+ (the fastest mode encodes at 28.1x real-time and decodes at 24.7x real-time). Self-extracting (sfx) archives can also be created with a small overhead of just 54 KB.

The compression ratios which can obtained with OptimFROG are generally ranging from 25% (silent classical music) to 70% (loud rock music) of the original audio file size. This is less compared with around 13% obtained with high quality MP3 files (~176 kb), but you have the great advantage of archiving and listening at perfect copies of your original music.

OptimFROG uses a new audio compression technology, the generalized stereo decorrelation concept (together with the optimal predictor), which was first introduced with OptimFROG 4.0b in December 2001. At the time of its introduction, the new technology yielded significant better (~1.5%) compression than existing state of the art lossless audio compressors.

What's New in This Release:

В· the highnew, extranew, bestnew modes and --maximumcompression get slightly better compression (on average 0.1%)
В· added --experimental option, enabling advanced experimental compression, which is NOT backward compatible with any previous 4.5xx versions
В· use --experimental with any mode for greatly improved compression for some files (on average, 0.60% better compression for Audio CDs)
В· extranew mode speed change when using --experimental: encoding < 35% slower, decoding < 11% slower
В· --experimental can be also used together with --maximumcompression
В· [other] the foobar2000 input plug-in now supports cue sheets (thanks to Artur for suggestions and testing)
В· [other] official GUI interface using FroG is ready, it will be included in the upcoming OptimFROG installer (thanks to Daniel, the FroG author; available at http://frog.objective-view.de/ )
В· [other] parsing WAV files with invalid headers is in the works

System Requirements:

No special requirements.
Program Release Status: New Release
Program Install Support: Install and Uninstall

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