Artifact: Difference between revisions
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* '''[[pre echo]]''': pre-echo consists in a small amount of noise used to appear just before a contrasted sound events (like percussive instruments). The original transients are therefore smeared: "___shhhTak" instead of "____Tak". | * '''[[pre echo]]''': pre-echo consists in a small amount of noise used to appear just before a contrasted sound events (like percussive instruments). The original transients are therefore smeared: "___shhhTak" instead of "____Tak". | ||
''Illustrative sample'': castanets.wav | ''Illustrative sample'': [[http://www-ccrma.stanford.edu/~bosse/ castanets.wav]] | ||
* '''ringing''': | * '''ringing''': | ||
Revision as of 21:01, 10 June 2006
An artifact is a noticeable difference between an uncompressed signal and a lossily-compressed copy. Lossy encoding can result in very different kind of artifacts/distortions. Sometimes it's not easy to define why the encoding is non-transparent. There are however many typical encoding artifacts.
Different kind of artifacts
- pre echo: pre-echo consists in a small amount of noise used to appear just before a contrasted sound events (like percussive instruments). The original transients are therefore smeared: "___shhhTak" instead of "____Tak".
Illustrative sample: [castanets.wav]
- ringing:
- warbling:
- coarseness:
- stereo collapse:
External links
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