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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 analog signals into digital signals.
G.722 is an ITU-T standard codec that uses sub-band adaptive
differential pulse code modulation (SB-ADPCM) within a bit rate of 64
kbit/s. The system is referred to as 64
Kbps (7 kHz) audio coding.
SB-ADPCM splits the frequency band into two sub-bands (higher and lower) and
the signals in each sub-band are encoded using ADPCM. Extensions to the
G.722 standard include the following;
- G.722.1 - Is the ITU-T standard for low-complexity coding at
24 and 32 kbit/s for hands-free operation in systems with low frame
loss.
- G.722.2 - Is the ITU-T standard for coding at 24 and 32
kbit/s for hands-free operation in systems with low frame loss.
See G.7xx for more information on how these standards are used in telephony
networks.
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 Enterprise VoIP Planet
The IT Manager's Guide to Voice over IP
ITU Recommendation G.722
7 kHz audio-coding within 64 kbit/s
Six Steps to Getting Your Network Ready for Voice over IP
Using low bandwidth CODECs helps reduce bandwidth requirements however due to the overhead of IP, UDP and RTP protocols, such reduction is limited.
The International Telecommunication Union
The International Telecommunication Union is an international organization within which governments and the private sector coordinate global telecom networks and services. This home page offers numerous links to highlights and current topics, standardization, radiocommunication, telecommunication, and general secretariat sectors.
Webopedia's Quick Reference Section
Use this Webopedia reference section for information on common Internet and computer facts and occurrences.
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| Related Terms |
analogcompression G.711 G.721 G.723 G.726 G.727 G.728 G.729 G.7xx Internet telephony ITU SB-ADPCM telecommunications VoIP
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