Optimal Rendering Format for Online Compressed Video Sequences
In recent years, online video websites such as YouTube developed rapidly and became more and more popular. Nowadays, a huge variety of video sequences is available on these websites, but they have a limited resolution and are typically highly compressed, due to limitations in the bandwidth and storage capacity. In addition, it has become common practice to display these online videos on a TV, while scaling the video to full screen. The implication of this, in terms of perceived quality, is the main topic of this paper. Sequences with different resolutions were first uploaded to an online video website, on which they were encoded. The downloaded sequences were then used in our experiment. They were displayed on a TV screen at different sizes by means of format scaling, and their quality was evaluated by the viewers. Next to the video quality, also the viewers preference for a certain size was investigated. The experimental results show that scaling to a larger format degrades the perceived image quality. Despite the lower quality, people prefer to upscale the video to some extent in order to obtain a better viewing experience. The optimal viewing size is mainly related to the resolution of the uploaded video; other factors, as e.g. the video content, seem to play a secondary role.
online video resolution video compression video quality video size scaling
Xiaodan Tang Kees Teunissen Xuefei Zhong Ingrid Heynderickx
School of Electronic Science and Engineering, Southeast University,Nanjing, China, 210096 Philips Co Philips Consumer Lifestyle, BG-TV Innovation Site Eindhoven, the Netherlands School of Electronic Science and Engineering, Southeast University,Nanjing, China, 210096 Philips Research Laboratories, Eindhoven, and Delft University of Technology, the Netherlands
国际会议
China Display/Asia Display 2011(2011年中国显示/亚洲显示会议)
江苏昆山
英文
733-736
2011-11-07（万方平台首次上网日期，不代表论文的发表时间）