Μ-law algorithm

The μ - law method ( often written u-law ) is a method of digitizing analog audio signal that has been standardized in Recommendation G.711 of the International Telecommunication Union ( ITU). In a manner similar to the A-law process according to the μ -law process uses a logarithmic quantization curve in order to achieve a better signal- to-noise ratio.

As well as in this method, each 8-bit values ​​are generated. However, at low levels, the quantization is steeper. In addition, the coding is designed to generate continuous sequences of 0s, but constantly changing bit states. For a specific method for clock recovery at the receiver of the digital signal is facilitated. The μ -law PCM method used by the technique in North America and Japan.

The quantization is divided into 15 segments in this process.

ITU- T recommendations

  • G.711: Pulse code modulation (PCM ) of voice frequencies
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