![]() ![]() The lossy compression algorithms vary based on the medium (still photos, audio, video, etc.), and even by the sub-category a photo from a camera might be best compressed with JPEG, whereas a computer graphic might be best compressed with a different codec. If you have pictures, audio, or video files, they may be able to be dramatically compressed while still remaining reasonable fidelity to the original if you can accept lossy compression. Text files are often dramatically compressible. One rule of thumb is that arbitrary computer files are typically around 50% compressible using a decent lossless algorithm. For a file to be losslessly compressible, its data must be repetitive or predictable. This is something of a basic tenet of a field of study known as Information Theory (closely related to Computer Science). ![]() ![]() Truly random data is not losslessly compressible at all. Some basic background information on compression: ![]()
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