An International Telecommunications Union (
ITU-T) standard for
for audio (speech)
compression and
decompression that is used in digital transmission systems, and in particular,
used for the coding of
analog signals into digital signals.
G.711 is also known as Pulse Code Modulation
(PCM). It is the ITU-T international
standard for encoding telephone audio on a 64 kbps channel. PCM
samples the
signal 8000 times a second; each sample is represented by 8
bits for a total
of 64 kbit/s. There are two versions of the this standard
codec. The µ-law
(pronounced as mew law) is generally used in North America and Japan
digital communications. The A-law is used in
European digital communications. The difference between the two standards is
the method in which the analog signal is sampled. (See also
PCM).
See G.7xx for more information on how these standards are used in telephony
networks.
