Error Concealment Techniques for Visual Quality Improving

화질 향상을 위한 오류 은폐 기법

  • 서재원 (충북대학교 전기전자컴퓨터공학부)
  • Published : 2006.02.01

Abstract

The MPEG-2 video compressed bitstream is very sensitive to transmission errors due to the complex coding structure of the MPEG-2 video coding standard. If one packet is lost or received with errors, not only the current frame will be corrupted, but also errors will propagate to succeeding frames within a group of pictures. Therefore, we employ various error resilient coding/decoding techniques to protect and reduce the transmission error effects. Error concealment technique is one of them. Error concealment technique exploits spatial and temporal redundancies of the correctly received video data to conceal the corrupted video data. Motion vector recovery and compensation with the estimated motion vector is good approach to conceal the corrupted data. In this paper, we propose various error concealment algorithms based on motion vector recovery, and compare their performance to those of conventional error concealment methods.

Keywords

MPEG-2 ;Video Coding;Error Concealment Technique;Motion Vector