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A-law




An a-law algorithm is a standard Companding algorithm, used in European Digital Communications systems to optimize, ''i.e.,'' modify, the Dynamic Range of an Analog Signal for digitizing.

It is similar to the μ-law Algorithm used in North America and Japan .

For a given input ''x'', the equation for A-law encoding is as follows,

:
  F^{-1}(y) \sgn(y) \begin{cases} {y (1 + \ln(A)) \over A}, & y < {1 \over 1 + \ln(A)} \