DCT Coefficient-Based Error Detection Technique for Compressed Video Stream

: In the process of transmission of digital encoded video bit streams over physical network, the data is corrupted by random bit errors, which has a several effect on the decoded video quality. The success of an error concealment algorithm depends heavily on the detection of the corrupted regions. In this paper we proposes a new error detection algorithm for discrete cosine transfom based video coding. Our algorithm detects so far undetectable erroneous regions with a very little increase in computational complexity. We show that erroneous blocks in the decoded frames can be detected monitoring the variation of average energy from block to block. To avoid false detection due to the presence of strong edges we employed a very fast DCT coefficient based edge detection algorithm. Computersimulation shows that the quality of the recovered image is significantly improved in comparison to the well-knownmethods.

• Type: Conference
• Year: 2000
• Where: ICMCS
• Authors: K. Bhattacharyya, H. S. Jamadagni
• Keywords: Detection Algorithm, Error Concealment Algorithm, Error Detection Algorithm, ICMCS 2000, Multimedia