感知客观收听质量预测 |
ITU-T P.863建议书阐述了预测窄带(NB)(300至3 400 Hz)至全频带(FB)(20至20 000 Hz)电信方案中总体语音收听质量的客观方法,其依据是来自用户从ITU-T P.800或ITU-T P.830绝对类别评级(ACR)专项听力测试得出的结果。ITU-T P.863建议书支持两种操作模式,一种是针对窄带,另一种是针对全频带。超宽带(50至14 000 Hz)实验可通过限制参考带宽并降低信号质量来模拟。本建议书介绍了该方法的高层描述、使用建议以及2006-2010年间开展的基准试验结果。该模式的所有基本部分均有详细说明,并用单独的PDF文件提供(请参见附件B)。这些文件均是本建议书不可分割的组成部分,如果建议书主体中的高层描述与相应的详细说明部分出现矛盾,本部分应具体优先级。附件A中还阐述了一致性测试程序,使用户能够验证此模式的替代实施是否正确。本建议书包括一个使用PDF格式的电子附件(见附件B)和一致性测试数据(见附件A)。P.863的Ed. 3不再应用最初的14 kHz低通滤波器,因此现在可以考虑14 kHz以上的频谱。这扩大了全频带语音编解码的应用范围,例如OPUS或EVS。此外,‘平移抖动’有所下降,可通过稍微延迟的重复测量进行观测。现已充分考虑到自动增益控制和慢时变线性频率扭曲造成的增益变化。此外,下述实施者指南中记录的P.863 Ed. 2问题已经处理并解决: – 关于评估以ITU-T P.863 (2016)建议书进行EVS编码语音的原实施者指南– 关于关于利用ITU-T P.863 (2016)建议书在语音中插入空隙的非证实测试条件原实施者指南 – 关于通过ITU-T P.863 (2016)建议书区别宽带和超宽带语音的原实施者指南– 关于纠正ITU-T P.863 (2016)建议书中混响内容的原实施者指南 |
|
Citation: |
https://handle.itu.int/11.1002/1000/13570 |
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: |
2018-03-16 |
Provisional name: | P.OLQA |
Approval process: | AAP |
Status: |
In force |
Maintenance responsibility: |
ITU-T Study Group 12 |
Further details: |
Patent statement(s)
Development history
|
|
|
|
ITU-T Supplement
|
Title
|
Status
|
Summary
|
Table of contents
|
Download
|
P Suppl. 10 (11/1988)
|
Considerations relating to transmission characteristics for analogue handset telephones
|
In force
|
-
|
here
|
here
|
P Suppl. 16 (11/1988)
|
Guidelines for placement of microphones and loudspeakers in telephone conference rooms and for group audio terminals (GATs)
|
In force
|
-
|
here
|
here
|
P Suppl. 20 (03/1993)
|
Examples of measurements of handset receive-frequency responses: dependence on earcap leakage losses
|
In force
|
-
|
here
|
here
|
P Suppl. 23 (02/1998)
|
ITU-T coded-speech database
|
In force
|
here
|
here
|
here
|
P Suppl. 24 (10/2005)
|
Parameters describing the interaction with spoken dialogue systems
|
In force
|
here
|
here
|
here
|
P Suppl. 25 (01/2011)
|
Parameters describing the interaction with multimodal dialogue systems
|
In force
|
here
|
here
|
here
|
P Suppl. 26 (09/2017)
|
Scenarios for the subjective evaluation of audio and audiovisual multiparty telemeeting quality
|
In force
|
here
|
here
|
here
|
P Suppl. 27 (01/2017)
|
Application of ITU-T P.863 and ITU-T P.863.1 for speech processed by blind bandwidth extension approaches
|
In force
|
here
|
here
|
here
|
P Suppl. 28 (09/2020)
|
Considerations for the development of new QoS and QoE related objective models to be embedded in Recommendations prepared by ITU-T Study Group 12
|
In force
|
here
|
here
|
here
|
P Suppl. 29 (01/2023)
|
ITU-T P.800 – Use cases
|
In force
|
here
|
here
|
here
|
Title |
Approved on |
Download |
Implementer's Guide 2 for Recommendation ITU-T P.863
|
2019-12-05
|
here
|
Implementers' Guide for Recommendation ITU-T P.863
|
2018-05-10
|
here
|
Title |
Approved on |
Download |
Practical procedures for subjective testing
|
2011
|
here
|
Addition to Section 2.3 of the Handbook on Telephonometry
|
2000
|
here
|
Addition to Section 3 of the Handbook on Telephonometry
|
2000
|
here
|
Additions to the Handbook on Telephonometry
|
1999
|
here
|
Telephonometry
|
1992
|
here
|
|