| IP语音传输质量评估模型的一致性测试 |
ITU-T P.564建议书规定了适用于客观语音质量评估模型的最小化准则，该模型用来预测所观测的IP网络减损对于在基于IP/UDP/RTP的3.1 kHz窄带电话应用中终端用户体验到的单向收听质量的影响。遵循本建议书的模型以ACR收听质量刻度来预测平均评价得分（MOS）。可以预见这些模型的主要应用是出于运行和维护的目的监测传输的质量，以及为了支持服务提供商与他们的用户之间的服务等级协定（SLA）而测量传输的质量。符合P.564的模型可以配置在端点位置和网络中部监测点。本建议书包括一个含有测试向量的电子附件。 |
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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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