Analysis and detection of MPEG-4 visual transmission errors over error-prone channels

摘要

Transmission of compressed video over error-prone channels requires techniques that are efficient in compressing the video and robust against the channel errors. The application of MPEG-4 in video communication can conform to the bandwidth limitation, but on the other hand the highly compressed bits is more susceptible to noise errors. Therefore many researchers have been working on error resilient and concealment techniques to recover errors caused by noises. However, the errors are always assumed to have been correctly located, which is the precondition for error concealment. In this paper, we propose a novel error detection technique. This scheme can detect some errors effectively and efficiently, which cannot be detected traditionally. Experimental results show that the error detection ratio (EDR) for this type of errors is more than 90%, even 100% sometimes.