Patent ID: 8363733

Claim:
A video decoder apparatus, using distributed video coding (DVC), wherein an encoded key frame and at least partially an error correction code of an encoded non-key frame are acquired, and a decoded key frame is used to form a predictive image of the non-key frame to perform an error correction on the predictive image with the error correction code, said apparatus comprising: a non-key frame decoder operative in response to information indicating that no error is detected being acquired instead of the error correction code for the non-key frame for outputting the predictive image as a decoded image of the key frame; and a key frame decoder for decoding the encoded key frame to thereby derive the decoded image, said non-key frame decoder comprising: a predictive image generator for forming the predictive image of the non-key frame on the basis of the decoded image of the key frame decoded by said key frame decoder, transforming the predictive image to a transform coefficient, and quantizing the transform coefficient for each band to resolve the transform coefficient into bit planes; an error correcting decoder for using the acquired error correction code to perform the error correction on the bit planes of the predictive image formed by said predictive image generator; and a decoded image generator for reconstructing the bit planes fed from said error correcting decoder into a frame, and carrying out inverse transform and dequantization on the reconstructed frame to obtain the decoded image, said error correcting decoder being responsive to information on a detection of no error, which is acquired instead of the error correction code for the non-key frame, to refrain from the error correction to supply the bit planes of the predictive image formed by said predictive image generator to said decoded image generator.