Power-distortion optimization and delay constraint scheme for layered video transmission

In this paper, by jointly considering power and delay constraints, we present an unequal error protection (UEP) approach for minimization of the receiver power consumption subject to a given quality of service, by exploiting data partition and selective hybrid automatic repeat request (HARQ). The proposed scheme assigns different error resilient tools to different priority data partitions with UEP and delay-constrained ARQ. Simulations are conducted to H.264 video over fading channels, and achieve excellent tradeoff between video delivery quality and power consumption. Simulation results demonstrate that the proposed scheme yields obvious better video quality compared with the classical unequal error protection approach and significant power saving compared with hybrid UEP (HUEP) scheme which adopts different HARQ mechanisms to different priority data in wireless video transmission.