Title:
Huawei U-VMOS: Benchmarking Video Experience
+ Language: Turkish
We all know, video has become a basic service for operators and video has been applied in more and more scenarios, from the entertainment video to communication video, and then extended to the remote education, health care and other industry applications, video has become an indispensable part of people’s life. Video communication service can realize the real-time communication of people, and enjoy the warm feeling of face to face. In the era of large bandwidth, with the rapid development of mobile smart terminals, video communication services are becoming the core business after the voice communication service for operators. Video communication business can radiate family first screen (TV screen) and the first person screen (mobile phone, pad), high quality video call experience will help operators to provide differentiated services, enhance user stickiness, gradually occupy both “first screen”.
After introducing U-vMOS as a user experience grading system for entertainment videos, Huawei has continued its efforts in this area and innovatively brought U-vMOS into video communications, which provides objective measurement standard for communication video quality. Using U-vMOS in video communication scenario allows real-time monitoring of degradation in user experience and provides carriers with an end-to-end diagnostic tool for determining and locating video experience issues from end-user to access networks, to transmission networks, and to core networks. It recognizes weaknesses in end-to-end video calls and creates a detection infrastructure for them, aiding service providers in network planning and optimization and enhancing end-user experience for video calls.
Using their knowledge of ergonomics, the Video Experience Research Team at Huawei carried out sample surveys and in-depth research to determine the top three factors affecting video communications; namely, audiovisual quality, interactive experience, and viewing experience. In essence, audiovisual quality was reflected in the clarity and smoothness of the video call; interactive experience was a factor of the loading time for video calls; and viewing experience was determined by the occurrence of blurring or buffering. Based on these three factors, Huawei performed a subjective test with a large sample size, constructed a user experience data model, and fit it into a mathematical formula, thereby creating an objective evaluation standard for overall real-time video experience as well as an analytical system for key performance indicators.
According to the feature of the communication video, the evaluation model of video experience has been extended accordingly. Compared to the entertainment video, communication video will be extended from one-way to two-way, so does the evaluation criteria model. And, in the communication scenario, users are more sensitive for network delay, including the call through delay. Therefore, U-vMOS standard correspondingly increases the delay proportion in video communication experience assessment. In addition, users pays more attention to audio quality and audio video coordination, such as lip and voice synchronization. The detection of related issues is also the technical difficulties in the assessment of communication video experience.
Looking back, Huawei has often demonstrated its commitment to the continuous improvement of video experience standards and the promotion of development in the video services industry. At the Ultra-Broadband Forum in September 2015, Huawei released U-vMOS, providing the industry with a unified video experience evaluation system for different types of screens, networks, and services. This unified system has led to more rapid and stable development in the video industry.
