This paper proposes an error resilient coding scheme that employs distributed video
coding tools. A bitstream, produced by any standard motion-compensated predictive
codec (MPEG-x, H.26x), is sent over an error-prone channel. In addition, a Wyner–Ziv
encoded auxiliary bitstream is sent as redundant information to serve as a forward error
correction code. At the decoder side, error concealed reconstructed frames are used as
side information by the Wyner–Ziv decoder, and the corrected frame is used as a
reference by future frames, thus reducing drift. We explicitly target the problem of rate
allocation at the encoder side, by estimating the channel induced distortion in the
transform domain. Rate adaptivity is achieved at the frame, subband and bitplane
granularity. Experimental results conducted over a simulated error-prone channel reveal
that the proposed scheme has comparable or better performance than a scheme where
forward error correction codes are used. Moreover the proposed solution shows good
performance when compared to a scheme that uses the intra-macroblock refresh
procedure.
