Video Quality Analysis in 3G Mobile Networks |
Most studies in the literature for video quality analysis have focussed on areas that involve improvement of metrics and standards with less occurrence of evaluation for factors that influence the quality of video delivered over real time network especially 3G mobile networks, that has evolved since its inception and is today widely accepted and delivered as a value added service. This research paper aims at evaluating and analysing the impact on video quality over live 3G mobile networks using objective prediction models. In particular it is an attempt to assess and understand the activities involved in video calls placed and the extent to which application parameters play a role in maintaining consistency in the overall quality at the end point. Extensive objective analysis was conducted with three base types of video with five distinctive dimensions: frame rate, bit rate, frame size, video encoder type and content. The sample sets were classified into two test cases one consisting of varied frame rates with variable bit rates selected automatically by the encoder and the second test case where sample sets were tested with fixed frame rates and low to high range of bit rates. Based on the results got using the objective metric analysis that was used to predict perceived viewing quality the it showed that the video sequences displayed good resilience in negotiating key parameters such as frame and bit rates and it was also found that the video sequences with slight and rapid movements demonstrated good viewing quality and the sequence with rapid movement displayed fair quality. It is believed that this study will help promote further initiatives to investigate real time networks with a transparent approach and help improve service provision.
Imran M, Sun L