Patent ID: 6636565
Filing Date: 2003-10-21
Classification: H04N

Abstract:
A method for concealing errors comprising:(a) extracting a picture coding type from among I-picture, P-picture and B-picture coding types of an input frame in which an error is generated by searching for coding modes of available neighboring blocks in a current frame to determine characteristics of a bitstream currently being decoded, and obtaining picture characteristics of the input frame, wherein said obtaining the picture characteristics by the following equation where Ct(k) for {k=1, . . . , m} represents neighboring blocks of a block with an error in the input frame at time t and m indicates a number of available neighboring blocks; DF=&Sum;k=1m&it;â€ƒ&it;&LeftBracketingBar;Ct&af;(k)-Ct-1&af;(k)&RightBracketingBar;(b) selecting an error concealing method from one of a plurality of error concealing methods depending upon the picture coding type extracted from among I-picture, P-picture and B-picture coding types and the picture characteristics wherein a temporal prediction error concealing method is selected if the value of DF is less than a first threshold value; and (c) compensating the input frame by concealing the error using a selected error concealing method.