Improving the Erroe Resilience of region of interest Based Video Coding Schemes

Transmission of compressed video is prone to errors due to the spatiotemporal prediction coding structure and variable length coding at the source encoder. A single incorrect recovered pixel in a reference frame can lead to more errors in the following reconstructed frames. The video has to be coded in a resilient format to combat the channel errors. There has been a lot of research to make the video coding and transmission resilient to transmission errors and various error resilient techniques have been developed for video coding. In many applications, there exist one or more regions in a video frame that have higher importance than the rest of the frame. For such applications, Region of Interest coding aims at providing better fidelity and better protection against errors in the ROI as opposed to the rest of the frame. This paper reviews the existing error resilient schemes available for making the region of interest based video coding more error resilient.