A robust scheme is presented for the efficient transmission of packet video over a heterogeneous channel. The channel consists of a wireless link with bit errors and a wired (e.g., Internet) channel with packet erasures. The scheme uses a source encoder that switches optimally between intra-coding and inter-coding with fixed-length packets. Different re-synchronization schemes are considered and compared. A cyclic redundancy check (CRC) outer coder concatenated with an inner rate-compatible punctured convolutional (RCPC) coder are used as Forward Error Correction (FEC). The scheme is evaluated over the simulated wireless Internet channel, and is shown to have promising performance.
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