  During transmission of video data over error-prone channels the risk of
getting severe image distortions due to transmission errors is ubiquitous. To
deal with image distortions at decoder side, error concealment is applied. This
article presents Motion Compensated Three-Dimensional Frequency Selective
Extrapolation, a novel spatio-temporal error concealment algorithm. The
algorithm uses fractional-pel motion estimation and compensation as initial
step, being followed by the generation of a model of the distorted signal. The
model generation is conducted by an enhanced version of Three-Dimensional
Frequency Selective Extrapolation, an existing error concealment algorithm.
Compared to this existent algorithm, the proposed one yields an improvement in
concealment quality of up to 1.64 dB PSNR. Altogether, the incorporation of
motion compensation and the improved model generation extends the already high
extrapolation quality of the underlying Frequency Selective Extrapolation,
resulting in a gain of more than 3 dB compared to other well-known error
concealment algorithms.
