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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 ?
711 codec also supports A-law, Mu-law, and passes all ITU verification tests.
The files are recorded in mu-law format for tProbe[TM] T1 and in A-law for tProbe[TM] E1.
With channel individual selectable A-Law coding and mu-Law coding on the near end as well as on the far end side the SIDEC can be used for law conversion purposes.
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.