Link Adaptation Based on Video Quality Monitoring for H.264/AVC Video Transmission over WLANs

Link adaptation algorithms employed by wireless routers traditionally use retransmission to achieve high error-free data throughput. Such methods do not take into account the delay sensitive nature of video data. In this paper, we investigate the use of reduced-reference video quality monitoring for video oriented link adaptation. Estimation of the quality degradation due to channel errors is performed at the receiver side using the No-Reference video quality Monitoring metric. The estimates are sent to the encoder side where, combined with mean squared error values for the encoded video, they form a reduced reference metric that gives information about the quality of the video at the receiver. Link adaptation is then performed using this reduced reference metric.