Extension of ITU-T P.1203 model to Tile-based Omnidirectional Video Streaming

Abstract

Omnidirectional video (ODV) streaming has become widespread. Since the data size of ODV is extremely large, tilebased streaming has been developed to compress the data. In this coding technology, high-quality tiles encoded at a higher bitrate for the users’ viewing direction and low-quality tiles encoded at a lower bitrate for the whole environment are sent to the client, and a player decodes these tiles. As a result, quality degrades due to coding, streaming, and the client’s buffer. Therefore, to provide high-quality tile-based ODV streaming services, qualityof- experience needs to be monitored by comprehensively evaluating the quality degradations. By taking into account the quality degradation due to the low-quality tiles, the ITU-T Recommendation P.1203 model, which can be used for monitoring the quality of 2D video streaming services, is extended to tile-based ODV streaming services. Our model is demonstrated to estimate quality with sufficiently high accuracy.