What is the difference between compression ratio and compression rate

What is the difference between compression ratio and compression rate?

[Guillaume]

Can you write more than one sentence in your question?

For a start, which field does this apply to. There's the compression ratio of an image, of a spring, of an engine, of an audio file, etc.

[Walter Roberson]

duplicates http://uk.mathworks.com/matlabcentral/answers/271939-can-be-a-compression-rate-100-200-1000-also-send-me-a-equation-to-calculate-compression-rate