| Conformance testing for voice over IP transmission quality assessment models |
ITU-T Recommendation P.564 specifies the minimum criteria for objective speech quality assessment models that predict the impact of observed IP network impairments on the one-way listening quality experienced by the end-user in IP/UDP/RTP-based telephony applications (3.1-kHz narrow-band in the main body, 7 kHz wideband in Annex B). Models compliant with this Recommendation predict mean opinion scores (MOS) on the ACR listening quality scale. It is expected that the primary applications for such models are monitoring of transmission quality for operations and maintenance purposes, and measurements in support of service level agreements (SLAs) between service providers and their customers. P.564-conformant models may be deployed both in endpoint locations and at mid-network monitoring points.This Recommendation includes an electronic attachment containing the test vectors. |
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| Citation: |
https://handle.itu.int/11.1002/1000/9266 |
| Series title: |
P series: Telephone transmission quality, telephone installations, local line networks
P.500-P.599: Objective measuring apparatus |
| Approval date: |
2007-11-13 |
| Provisional name: | P.VTQ |
| Approval process: | AAP |
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Status: |
In force |
| Observation: | This Recommendation includes an electronic attachment containing the test vectors for conformance testing of voice over IP transmission quality assessment models |
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Maintenance responsibility: |
ITU-T Study Group 12 |
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Further details: |
Patent statement(s)
Associated test signals
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ITU-T Supplement
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Title
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Status
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Summary
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Table of contents
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Download
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P Suppl. 10 (11/1988)
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Considerations relating to transmission characteristics for analogue handset telephones
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In force
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-
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here
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here
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P Suppl. 16 (11/1988)
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Guidelines for placement of microphones and loudspeakers in telephone conference rooms and for group audio terminals (GATs)
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In force
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-
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here
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here
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P Suppl. 20 (03/1993)
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Examples of measurements of handset receive-frequency responses: dependence on earcap leakage losses
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In force
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-
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here
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here
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P Suppl. 23 (02/1998)
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ITU-T coded-speech database
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In force
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here
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here
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here
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P Suppl. 24 (10/2005)
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Parameters describing the interaction with spoken dialogue systems
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In force
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here
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here
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here
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P Suppl. 25 (01/2011)
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Parameters describing the interaction with multimodal dialogue systems
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In force
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here
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here
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here
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P Suppl. 26 (09/2017)
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Scenarios for the subjective evaluation of audio and audiovisual multiparty telemeeting quality
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In force
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here
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here
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here
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P Suppl. 28 (09/2020)
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Considerations for the development of new QoS and QoE related objective models to be embedded in Recommendations prepared by ITU-T Study Group 12
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In force
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here
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here
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here
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P Suppl. 31 (01/2025)
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Subjective quality evaluation of audiovisual communication in videotelephony services
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In force
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here
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here
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here
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| Title |
Approved on |
Download |
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Addition to Section 2.3 of the Handbook on Telephonometry
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2000
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here
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Addition to Section 3 of the Handbook on Telephonometry
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2000
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here
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Additions to the Handbook on Telephonometry
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1999
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here
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Telephonometry
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1992
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here
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