Abstract: A novel three-dimension data interleaving method is proposed for video data transmission over wireless OFDM channels, where the three-dimensional interleaving includes interleavings in the spatial domain, frequency domain and temporal domain. The interleaving in the spatial domain is to uniformly disperse the burst bit-errors over the picture area. The frequency domain interleaving is to transmit adjacent slices over spaced sub-channels, which facilitates temporal or spatial error concealment. Temporal interleaving is to transport different slices in one OFDM sub-carrier in changed time intervals. It can provide credible reference picture for inter-frame prediction coding, and thus the error propagation over frames can be avoided, and the error concealment can be exploited too. System integrating the three-dimension data interleaving method with the multi-reference picture selection (RPS) and error concealment can efficiently improve the quality of the reconstructed video transmitted over wireless OFDM channels. Simulation results show that the proposed method can increase the PSNR of reconstructed video transmitted over OFDM wireless channels by over 4dB under different channel conditions.

Key words: video transmission, three-dimension interleaving, prevent error propagation, wireless OFDM channels, error concealment