High efficient adaptive block based error concealment for digital images with data hiding

Data hiding has become important since the rising of internet and multimedia services. Issues about authentication and error concealment of digital images get considerable attention in applications of military, tele-medical, and surveillance systems without local storage device. Due to the crucial time and space restriction under these circumstances, images of a specific time are usually non-reproducible. Furthermore, images using in each of these applications are highly content-sensitive. Consequently, error concealment with data hiding has been designed for specific applications. However, the common defect of these algorithms is the time consuming at either encoding or decoding end. This paper proposes a high efficient adaptive block based error concealment with data hiding. The information of recovery for each block is embedded to other blocks adaptively by its content. Each block is classified to be an interblock or an intrablock according to the sum of absolute values of the AC DCT coefficients of the block. If it is an interblock it takes advantage the redundant information for its adjacent blocks and its bit rate for recovery is determined to be small. If it is an intrablock it is further classified to be in one of three groups. A block recovery bit rate assignment algorithm is used to assign the block of each group the bit rate it needs for recovery according to the complexity of the block. The simulation shows the effectiveness of the proposed error concealment method to recovery the image in good quality when certain blocks are not available.