Encoding law

In signal processing, an encoding law defines the relationship between input amplitude and its digital representation, determining the effective quantization step size across the signal.[1] It's not a law, but an algorithm, implementation is typically non-uniform across possible analog signal levels in an analog-to-digital converter system, and can be viewed as a simple form of instantaneous companding.

The best-known encoding laws are the μ-law and A-law encoding laws defined in the ITU-T standard G.711 for use in digital telephony, and still used to the present day.

References

  1. ^ Delozier, John F. (2001). Digital Transmission of Analog Signals (PDF) (Revised and reprinted 2001 ed.). San Jose, CA, USA: WJ Communications, Inc.
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