Patent ID: 7944966
Filing Date: 2011-05-17
Classification: H04N

Abstract:
1. For use in a video decoder comprising processing circuitry capable of receiving from a transmitting and/or storing medium a video bitstream which itself includes base layer coded video signals and enhancement layer coded video signals and decoding said bitstream for generating decoded signals corresponding either only to the base layer signals, to be then displayed alone, or to the base layer signals and the enhancement layer signals, to be then displayed together, a method of decoding said video bitstream including said base layer and enhancement layer coded video signals, comprising the steps of: decoding the base layer coded video signals to produce decoded base layer frames; decoding the enhancement layer coded video signals to produce decoded enhancement layer frames; displaying the decoded base layer frames either alone or with the decoded enhancement layer frames to form video frames; said method being characterized in that the displaying step itself comprises: a decision sub-step, for examining on the basis of a given criterion the quality of each successive base layer frame to be displayed and selecting the poor quality frames; a replacement sub-step, for replacing each poor quality base layer frame by at least one of the two frames of the enhancement layer preceding and following said poor quality frame base layer frame.