| 通话质量的主观评价 |
ITU-T P.805建议书阐述有关评估通信质量的通话测试方法和程序。该方法使用情形示例、分级量表（rating scales）和分析程序估算电信业务的主观质量。通话测试有利于更真实地模拟接近电话用户实际得到服务的情况。此外，通话测试旨在评估可造成通话困难的缺陷效应（如迟延、数据包丢失、回声、中断、噪声、削波（clipping）等），并可用于研究整体系统效应及具体劣化情况。 |
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| Citation: |
https://handle.itu.int/11.1002/1000/9066 |
| Series title: |
P series: Telephone transmission quality, telephone installations, local line networks
P.800-P.899: Methods for objective and subjective assessment of speech and video quality |
| Approval date: |
2007-04-22 |
| Provisional name: | P.conv |
| Approval process: | AAP |
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Status: |
In force |
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Maintenance responsibility: |
ITU-T Study Group 12 |
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Further details: |
Patent statement(s)
Development history
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| Ed. |
ITU-T Recommendation |
Status |
Summary |
Table of Contents |
Download |
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1
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P.805 (04/2007)
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In force
|
here
|
here
|
here
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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
|
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
|
-
|
here
|
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
|
In force
|
-
|
here
|
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
|
here
|
here
|
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
|
here
|
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
|
here
|
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
|
here
|
here
|
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
|
here
|
here
|
here
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P Suppl. 29 (01/2023)
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ITU-T P.800 – Use cases
|
In force
|
here
|
here
|
here
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| Title |
Approved on |
Download |
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Practical procedures for subjective testing
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2011
|
here
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Addition to Section 2.3 of the Handbook on Telephonometry
|
2000
|
here
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Addition to Section 3 of the Handbook on Telephonometry
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2000
|
here
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Additions to the Handbook on Telephonometry
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1999
|
here
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Telephonometry
|
1992
|
here
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