Editing Vorbis (section)

===Outline of coder algorithm===
Vorbis I is a forward-adaptive monolithic transform codec based on the [[modified discrete cosine transform]] (MDCT).<ref name="vorbis-mdct">{{cite web |author=Xiph.Org Foundation |publisher=Xiph.Org Foundation |url=http://www.xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-50001.1.2 |title=Vorbis I specification - 1.1.2 Classification |date=2009-06-02 |access-date=2009-09-22}}</ref> Vorbis uses the modified discrete cosine transform for converting sound data from the [[time domain]] to the [[frequency domain]]. The resulting frequency-domain data is broken into [[noise floor]] and residue components, and then [[Quantization (signal processing)|quantized]] and [[entropy coded]] using a [[codebook]]-based [[vector quantization]] algorithm. The decompression algorithm reverses these stages. The noise-floor approach gives Vorbis its characteristic analog noise-like failure mode when the bitrate is too low to encode the audio without perceptible loss. The sound of compression artifacts at low bitrates is similar to [[Reverberation|reverberations]] in a large space.