A Cross-Layer H.264/AVC Video Transmission Method Over Wireless OFDM

This paper focuses on the issue of cross-layer control for H.264/AVC video transmission over OFDM. Jointly considering the error resilient (ER) tools provided by H.264/AVC and the characteristics of OFDM channels, a cross-layer scheme is proposed, in which a cross-layer allocator is used to allocate channel resources for different priority video data transmission, and feedback transmission status information to H.264/AVC encoder for error resilient encoding. By allocation, a 3-D interleaving is implemented to improve the reliance of the communication, and a cross-layer feedback is operated to inform the encoder for a more resilient coding processing to obtain optimal transmission quality. The experimental results indicate that the proposed scheme can dramatically improve the received video quality over wireless OFDM.