Cook Codec
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Thecook codecis alossyaudio compressioncodecdeveloped byRealNetworks.It is also known as Cooker, Gecko, RealAudio G2, and RealAudio 8 low bitrate (RA8LBR).
Introduced in 1998, the cook codec was the first audio codec developed by RealNetworks in-house, and was named after its author, Ken Cooke. It is a pure transform codec based on themodified discrete cosine transformwith a single block size.
In 2003, RealNetworks introduced asurround soundversion of cook, called RealAudio Multichannel. This was initially designated by the four-character code 'whrl', but is now identified as 'cook', as mono/stereo files are.
Although RealNetworks never published a technical description of the cook codec, others havereverse engineeredthe format, and as of December 2005,FFmpeglibavcodeccontains a decoder capable of playing cook-encoded files. As of July 2009,Rockboxis capable of playing cook-encoded files as well.