IMGAE DECODER HAVING FUNCTIONS FOR RECONSTRUCTING BITS ERROR

摘要

The present invention relates to an image decoding apparatus having a bit error recovery function suitable for recovering a bit error occurring in a motion compensated prediction error (MCPE), wherein the bit error for detecting a motion compensated prediction error in a bitstream including parit bits A candidate generator configured to generate candidate motion compensation prediction data for the motion compensation prediction error in which the error occurs, when an error is detected by the detector and the bit error detector, based on candidate motion compensation prediction data of the candidate generator; A candidate MCPE generator for generating a candidate block, an adder for outputting candidate blocks reconstructed based on the candidate blocks and motion vector information of the candidate MCPE generator, a higher frequency than the low frequency component in the candidate block reconstructed by the adder The different weights to allow greater weighting of the components A weight generator for outputting the candidate block to which the generated weight is applied, and a candidate block having the least correlation among the candidate blocks based on the correlation between the candidate blocks weighted by the weight generator and a neighboring block; If a bit error (error) is generated due to a transport channel environment by providing a candidate decision unit for selecting a candidate block and a candidate block compensation unit for restoring the motion compensation prediction in which the error is generated as the candidate block determined by the candidate decision unit, By replacing the candidate block having the smallest correlation with the neighboring block among the candidate motion compensation prediction errors, the error-prone data can be restored.