Advanced Audio Coding isused for its popular iTunes and iPod products

Tag : Audio
Lossless compression means that none of the audio data is removedduring compression. Lossy compression means that audio data ispermanently removed from the audio file. Lossy compression resultsin smaller files, but there is no way to rebuild the audio data toits original format. MP3 is an example of lossy compression.

Lossy Compression Formats

There are many alternatives to MP3 when it comes to encoding audiofiles. Microsoft reportedly developed the WMA format to avoid thelicensing costs associated with MP3. WMA files can be played withthe Windows Media Player that is included with the Windowsoperating system as well as many other audio players. It featuressimilar encoding rates to MP3 and similar file sizes.

AAC (Advanced Audio Coding) is the format preferred by Apple and isused for its popular iTunes and iPod products. AAC files can besmaller than MP3 files because it uses more efficient encodingtechnology. A 96 kpbs AAC file is similar in sound quality to a 128kbps MP3 file.

Ogg Vorbis is another type of lossy compression and uses .OGG asthe file extension. It is an open-source product and unlike MP3,there are no patent restrictions on its use.

Lossless Compression

For the audio purist who insists on the best quality soundpossible, lossless compression offers CD quality sound. Thetradeoff is larger files sizes  while MP3 can compress audio inthe range of 80% - 90%, lossless compression typically compressesthe file by half.

Popular lossless formats include FLAC, Monkeys Audio, and SHN(Shorten). These formats are supported by many audio players andare popular for archiving CD collections as well as for tradingmusic.
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