Re: compressing compressed video

copx 쓴 글:
Is it possible to noticeably compress already compressed video (DivX/MPEG) even futher using a loseless compression program?

The noticeble compression is not possible in that case, since the basic principle of the loseless compression is the same as the lossy compression. Remind that the principle of the lossless compression is to allocate the less number of bits to the more common word until reaching the entropy of information as closely as possible.

However, vice versa is possible in many cases since the way of the lossy compression is to allocate more less bits to the comman words than that by the lossless one, which leads the information rate to below of the entopry rate until satisfying certain thresholds or conditions.

-James
.

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