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The North America standard for nonuniform quantising logarithmic compression.


A North American telephony standard for converting analog voice into a digital data stream using pulse code modulation (PCM). The "pulse code" in PCM comes from the telephone company's method of sending a pulse or no pulse down the line.

Mu-Law signals typically ride on a single 64 Kbps DS0 channel in a T1 line. Mu-Law uses a companding technique that provides more quantization steps at lower amplitude (volume) than at higher amplitude. North America and Japan use mu-Law, while Europe uses A-Law. Mu-Law comes from µ-Law, which uses the Greek letter µ, pronounced "myoo." See PCM and A-Law.
References in periodicals archive ?
The files are recorded in mu-law format for tProbe[TM] T1 and in A-law for tProbe[TM] E1.
R1, R2, and DTMF, as well as custom variants for over 80 countries, and perform mu-Law to A-Law rate conversion.
Kulkarni further added, “The enhancements introduced to Oscilloscope and Power Spectral Display applications include options for displaying all signaling formats - A-Law, Mu-Law, PCM 16 bit, PCM 13 bit, PCM 14 bit, PCM 8 bit and different byte order for INTEL (Little Endian) and MOTOROLA (Big Endian) 16 bit signals sampled at 16 KHz can also be displayed.