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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 analogsignals into digital signals.

G.727 is a specialized version of the ITU-T G.726 protocol that is intended for packet-based systems using the Packetized Voice Protocol (PVP). G.727 uses 5, 4, 3 and 2-bit/sample embedded Adaptive Differential Pulse Code Modulation (ADPCM). (See also ADPCM).

See G.7xx for more information on how these standards are used in telephony networks.
See also ADPCM.

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