Patent ID: 7050637

Claim:
An image decoding apparatus in which, for nonnegative integers i and j, data of an i-th key frame and a j-th key frame are defined as KF i and KF j , respectively, a correspondence data file between the i-th key frame and the j-th key frame is defined as C i,j , and data of an intermediate frame between the i-th key frame and the j-th key frame is defined as IF i,j , the apparatus comprising: an error detector which receives a data stream that includes KF i , KF i+1 and C i,i+1 , and detects whether or nor there is an error in the data stream; an intermediate image generator which generates IF i,i+1 from the data stream; and an error controller which, when an error occurs in the data stream, controls said intermediate image generator in a manner such that an error avoidance processing is performed in said intermediate image generator.