Patent ID: 8396135

Claim:
A video coding method, comprising the steps of: a) coding successive images of a video sequence to generate coding parameters; b) including the coding parameters in an output stream to be transmitted to a station including a decoder; c) receiving, from said station, back channel information on reconstruction of the images of the video sequence by the decoder; d) analyzing the back channel information in order to identify among the reconstructed images a reconstructed image that includes a portion that has been lost in the decoder, and in the event of such identification, to identify in the subsequent coded images between said reconstructed image and a current image to be coded an image portion that refers to the lost portion of said reconstructed image; and e) if at least a portion of the image has been identified as lost in the step d), coding said current image of the video sequence, excluding said identified lost portion and coded image portions identified in the step d) as referring to said lost portion, wherein said analysis step d) includes: storing an identifier associated with said reconstructed image, which has been identified, in correspondence with a state parameter that indicates either the loss or the absence of loss of a portion of the reconstructed image; and updating said correspondence stored as a function of the identification or non-identification in said subsequent coded images of an image portion that refers to the lost portion of said reconstructed image.