Subcarrier mapping based on slice visibility for video transmission over OFDM channels

摘要

We address channel code rate optimization for transmission of non-scalable coded video sequences over orthogonal frequency division multiplexing networks for scenarios with arbitrary mobility. A slice loss visibility (SLV) model is used to evaluate the visual importance of each H.264 slice. In particular, taking into account both the visibility scores available from the bitstream and the channel state information, we optimize the channel code rate for each GOP and the mapping of video slices within 2-D time-frequency resource blocks, in order to better protect more visually important slices. Results demonstrate that the proposed algorithm outperforms baseline ones which do not take into account the SLV in the video transmission.