Patent ID: 6285715
Filing Date: 2001-09-04
Classification: H04N

Abstract:
A method of concealing errors while decoding a coded video bit stream, where a current macroblock is represented by data of reference frame and at least one motion vector, comprising the steps of:detecting the presence of an error in data representing the current macroblock; andif a macroblock for a frame preceding a current frame positioned by a vector is available, estimating the current macroblock positioned by the vector to be equal to the macroblock for the frame preceding the current frame positioned by the vector; otherwiseif a macroblock for the current frame positioned by the vector p but indexed by minus 1 row and in the same column is available, estimating the current macroblock to be equal to the macroblock for the current frame positioned by the vector p but indexed by minus 1 row and in the same column; otherwise,if a decoded macroblock for the macroblock located immediately above the current macroblock is available, estimating the current macroblock for the current frame to be equal to such decoded macroblock for the macroblock located immediately above the macroblock to be estimated.