Data compression techniques in Computer network
If the typical data distribution skews away from the data that was sampled when the dictionary was created, compression ratios can decrease.
The maximum compression ratio is 90 percent..
Text compression techniques
Data compression can reduce a text file to 50% or a significantly higher percentage of its original size.
For data transmission, compression can be performed on the data content or on the entire transmission unit, including header data..
What is a good compression ratio for files?
You cannot always accurately estimate the compression ratio by simply examining the data.
On average, you can expect to achieve between 2:1 and 15:1 compression for AFP documents and up to 30:1 compression for line data reports..
What is a good compression ratio?
The compression ratio is defined as the ratio between the volume of the cylinder with the piston in the bottom position, Vbottom (largest volume), and in the top position, Vtop (smallest volume).
The higher this ratio, the greater will be the power output from a given engine.
It is generally in the 6–10 range..
- The compression ratio determines how much gain reduction the compressor applies when the signal passes a threshold level.
For example, a ratio of 4:1 means that for every 4 dB the signal rises above the threshold, the compressor will increase the output by 1 dB.
