Behavior of Quality Assessment Metrics Under Packet Losses on Wireless Networks
Source: Polytechnic University
PSNR does not always rank quality of an image or video sequence in the same way that a human being. When evaluating coding proposals under specific distortion like compression or packet losses, the use of the PSNR as quality assessment metric does not guaranty the correct interpretation of the performance of the proposed encoders measured in terms of perceived quality. Searching for a better perceptual quality metric for these comparisons, the authors analyze the behaviour of some of the most relevant objective quality metrics when they are applied to video com-pressed by a H264/AVC codec at different bit-rates and with error resilience options enabled. Video data is transmitted in a wireless MANET environment and packet losses are modeled for different scenarios of congestion and mobility states.