H.264 Video Transmission Over IEEE 802.16 Through A Cross-Layer Architecture

The emerging video coding standard H.264/AVC, which is jointly developed by ITUT and MPEG, can provide high compression efficiency without loss of video quality and good network adaptive trait. Meanwhile, the demand for fast and location-independent access to multimedia services offered on today's Internet is steadily increasing. Hence, most current and future cellular networks, like GSM-GPRS, UMTS, or CDMA-2000, and IEEE 802.16 contain a variety of packet-oriented transmission modes allowing transport of practically any type of IP-based traffic to and from mobile terminals. H.264 video transmission on IEEE 802.16 will be a widely used scenario in the future. So that recerch on how to guarantee the QoS for H.264 video transmission on IEEE 802.16 it's necessary and important.This paper proposes an improved intra mode decision algorithm and video transition detection algorithm to optimaize the IDR technique in H.264. A cross-layer architecture is also proposed in this paper. We give a new bandwidth allocation algorithm in 802.16 MAC and a new link-adaptive algorithm in 802.16 RLC based on the priority of the H.264 data packet. Simulation results show that our proposed intra mode decision algorithm can save the time by up to 40% with negligible loss of PSNR and increment of bit rate. And our cross-layer architecture can effectively gurantee the H.264 transmission QoS.