Supplement 77 to ITU-T G-series Recommendations (06/2022) Influencing factors on quality of experience (QoE) for video customized alerting tone (CAT) and video customized ringing signal (CRS) services
Summary
History
FOREWORD
Table of Contents
1 Scope
2 References
3 Definitions
     3.1 Terms defined elsewhere
4 Abbreviations and acronyms
5 Conventions
6 HD video CAT overview
7 Key influencing factors of HD video CAT and CRS QoE
     7.1 Key factors of video quality
          7.1.1 Video content related
          7.1.2 Video codec related
          7.1.3 Video initial buffer time
          7.1.4 Video stall
          7.1.5 Video mosaic
          7.1.6 Frame skipping
     7.2 Key factors of audio quality
          7.2.1 Audio content related
          7.2.2 Audio codec related
          7.2.3 Audio stall
     7.3 Key factors of video display on terminal
          7.3.1 Video interface layout
          7.3.2 Dial plate display strategy
          7.3.3 Video prompt words
     7.4 Key factors of audio playback on terminal
          7.4.1 Audio output related
          7.4.2 Audio volume related
     7.5 Key factors of CAT and CRS switch
          7.5.1 Called party answered related
          7.5.2 Called party hangs up the call related
          7.5.3 Called party timeout related
          7.5.4 Calling party hangs up the call related
Bibliography
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