The Standard

ITU-T G.711 is a standard to represent 8 bit compressed pulse code modulation (PCM) samples for signals of voice frequencies, sampled at the rate of 8000 samples/second. G.711 encoder will create a 64 Kbps bitstream. This standard has two forms, viz., A-Law and µ-Law. A-Law G.711 PCM encoder converts 13 bit linear PCM samples into 8 bit compressed PCM (logarithmic form) samples, and the decoder does the conversion vice versa. µ-Law G.711 PCM encoder converts 14 bit linear PCM samples into 8 bit compressed PCM samples.

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