networking - Non uniform quantization -


when (for type of input) quantization non-uniform spacing of levels yield better signal-to-noise ratio quantization uniform spacing?

non-uniform quantization used when channel capacity (bits per second) limited , input has large dynamic range. best examples know a-law , mu-law compression methods used in digital phone systems.

the basic assumption makes them work relative dynamic levels within voice signal quite limited while absolute level can vary lot, covering range whispering shouting.


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