Updated: 12/13/2011 Digital Compression In More Detail
Other camcorders use a 4:1:1 format, which depends on a greater level of compression, resulting in some minimal compromises in video quality. Although an initial side-by-side comparison of the 4:2:2 and 4:1:1 may reveal little or no difference, the quality advantage of 4:2:2 becomes apparent when editing, copying, and complex visual effects are required.
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All commonly used digital
video formats use some level of compression. Top-of-the-line digital camcorders
use a "no compromise" digital 4:2:2 format, which
has minimal compression, with the luma and chrominance recorded
separately. This format also has a much higher digital sampling rate and
requires considerable bandwidth to record.
