FRAME ERROR CONCEALMENT

摘要

A frame error concealment method based on frames including transform coefficient vectors including the following steps: It tracks (S11) sign changes be- tween corresponding transform coefficients of predetermined sub-vectors of consecutive good stationary frames. It accumulates (S12) the number of sign changes in corresponding sub-vectors of a predetermined number of consecutive good stationary frames. It reconstructs (S13) an erroneous frame with the latest good stationary frame, but with reversed signs of transform coefficients in sub-vectors having an accumulated number of sign changes that exceeds a predetermined threshold.