DETECTION AND CORRECTION OF TRANSMISSION ERRORS IN DPCM IMAGES

作     者：CHANG, CH LEOU, JJ 

作者机构：NATL CHUNG CHENG UNIVINST COMP SCI & INFORMAT ENGNCHIAYI 621TAIWAN 

出 版 物：《IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY》 (IEEE Trans Circuits Syst Video Technol)

年 卷 期：1995年第5卷第2期

页      面：166-171页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：National Science Council  Republic of China  (NSC 83-0404-E194-019) 

主　　题：sliding windows differential pulse code modulation gray level Decision Trees Transmission errors 

摘      要：In this paper, a new approach to detection and correction of transmission errors in DPCM images is proposed. Here each transmission error (streak noise) is detected via a sequence of the WMW rank-sum tests performing on a sliding window using four particularly designed grouping schemes. Instead of four possible patterns used in Kundu and Wu, in the proposed approach 18 possible detection patterns represented as a decision tree are identified. And the transmission error detection procedure is equivalent to tracing the decision tree. The estimated gray level shift of a detected streak noise is used to locate the streak origin. Then instead of using previous line replacement, each streak noise can be almost deleted by compensating the corrupted pixels with the estimated gray level shift. Experimental results show the feasibility of the proposed approach.