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ITU-T P.311

Transmission characteristics for wideband digital handset and headset telephones

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Organization: ITU-T
Publication Date: 1 March 2011
Status: active
Page Count: 28
scope:

This Recommendation provides audio performance requirements and test methods for digital handset and headset telephones capable of transmitting an audio bandwidth extending beyond the conventional telephony bandwidth of 300 Hz to 3400 Hz, to a bandwidth of approximately 100 Hz to 8000 Hz. Such telephones are known as wideband audio telephones, and will make use of digital encoding schemes such as in [ITU-T G.722]. IP terminals may support other coding algorithms. Wideband audio telephones are expected to be used in new services such as high quality audio conferencing, video conferencing and multimedia applications.

The requirements listed in this Recommendation are primarily applicable to telephones using ITU-T G.722 encoding at 64 kbit/s, but should also be used as the basis of requirements for other wideband audio encoding schemes. This is still under study in ITU-T.

Conventional telephone band (300 Hz-3400 Hz) digital handset telephones using encoding according to [ITU-T G.711] and [ITU-T G.726] are covered by [ITU-T P.310].

Document History

ITU-T P.311
March 1, 2011
Transmission characteristics for wideband digital handset and headset telephones
This Recommendation provides audio performance requirements and test methods for digital handset and headset telephones capable of transmitting an audio bandwidth extending beyond the conventional...
June 1, 2005
Transmission characteristics for wideband (150-7000 Hz) digital handset telephones Subscribers' lines and sets
A description is not available for this item.
February 1, 1998
Transmission Characteristics for Wideband (150-7000 Hz) Digital Handset Telephones - Series P: Telephone Transmission Quality, Telephone Installations, Local Line Networks - Subscribers' Lines and Sets
A description is not available for this item.
January 1, 1995
Transmission Characteristics of Wideband Handset Telephones - Telephone Transmission Quality (Study Group 12) 15 pp
A description is not available for this item.

References

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