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Can someone please tell me what is meant by compression gain.<br />
I have compressed a text string with LZW, the efficiency before compression is 99.5% and after compression 92.3% using:<br />
(Entropy / Av Codeword Length) * 100<br />
It takes 50 bits to encode the data before compression and 60 bits after (so its not really worth compressing with this method).<br />
<br />
So is the compression gain simply a bit value (ie 10 bits) or is it related to the efficiency (ie 99.5 - 92.3)<br />
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Thanks In Advance<br />
<br />
Rick
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Can someone please tell me what is meant by compression gain.
I have compressed a text string with LZW, the efficiency before compression is 99.5% and after compression 92.3% using:
(Entropy / Av Codeword Length) * 100
It takes 50 bits to encode the data before compression and 60 bits after (so its not really worth compressing with this method).

So is the compression gain simply a bit value (ie 10 bits) or is it related to the efficiency (ie 99.5 - 92.3)

Thanks In Advance

Rick

What is Compression Gain?

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. In addition to local storage devices like CD and DVD readers, hard drives and flash drives, solid state drives can hold enormous amounts of data in a very small device. Cloud services and other new forms of remote storage also add to the capacity of devices and their ability to access more data without building additional data storage into a device.