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Lossy compression
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===Compression ratio=== The [[data compression ratio|compression ratio]] (that is, the size of the compressed file compared to that of the uncompressed file) of lossy video codecs is nearly always far superior to that of the audio and still-image equivalents. * Video can be compressed immensely (e.g., 100:1) with little visible quality loss * Audio can often be compressed at 10:1 with almost imperceptible loss of quality * Still images are often lossily compressed at 10:1, as with audio, but the quality loss is more noticeable, especially on closer inspection.
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