DETECTION AND CORRECTION OF TRANSMISSION ERRORS IN PYRAMID IMAGES

In this study, two detection and correction approaches to protection f rom transmission errors in pyramid images are proposed, For entropy-co ded pyramid images, a single transmission error in a codeword will not only affect the underlying codeword, but also may affect subsequent c odewords. Consequently, a single error in an entropy-coded system may result in significant degradation, In this paper, two types of variabl e-length codes with the synchronization capability are proposed to enc ode two types of pyramid images, namely, the difference pyramid and th e reduced-difference pyramid, to overcome the synchronization problem. The proposed approaches detect transmission errors by examining error checking conditions. When a transmission error is detected, a sequenc e of bit inversions and redecoding processes is performed on the corru pted part of the compressed image bitstream until a feasible redecodin g solution is found. The simulation results show significant quality i mprovement.