Transparency (data compression): Difference between revisions

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In [[data compression]] and [[psychoacoustics]], '''transparency''' is the result of [[lossy data compression]] accurate enough that the compressed result is [[perception|perceptually]] indistinguishable from the uncompressed input, i.e. '''perceptually lossless'''. In other words, transparent compression has no perceptible [[compression artifact]]s.

A '''transparency threshold''' is a given value at which transparency is reached. It is commonly used to describe compressed data bitrates. For example, the transparency threshold for MP3 to [[linear PCM]] audio is said to be between 175 and 245&nbsp;kbit/s, at [[44.1 kHz|44.1&nbsp;kHz]], when encoded as [[Variable_bitrate|VBR]] MP3 (corresponding to the -V3 and -V0 settings of the highly popular [[LAME]] MP3 encoder).<ref name="LAME Recommended Encoder Settings">{{citation