Channel Coding Optimization Based on Slice Visibility for Transmission of Compressed Video Over OFDM Channels

Optimization of multimedia transmissions over wireless channels should be aimed at maximizing the video quality perceived by the final user. For transmission of video sequences over an Orthogonal Frequency Division Multiplexing (OFDM) system in a slowly varying Rayleigh faded environment, the authors develop a cross-layer technique, based on a Slice Loss Visibility (SLV) model used to evaluate the visual importance of each slice. In particular, taking into account the visibility scores available from the bit-stream, depending on the scenario, they optimize the mapping of video slices within a 2-D time-frequency resource block and/or the channel code rates, in order to better protect more visually important slices.

Provided by: Institute of Electrical & Electronic Engineers Topic: Mobility Date Added: Aug 2012 Format: PDF

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