다수 참조 프레임 기반의 H.264/AVC 에러 리질리언스 성능 개선 연구

Abstract

H.264/AVC is a video coding standard widely used in many multimedia services because of its higher coding efficiency and various application possibilities. In order to increase the compression rate, H.264/AVC standard encodes video data by the motion estimation using multiple reference frames and decides the optimal encoding mode by Rate-Distortion Optimization (RDO). Basically, motion estimation using multiple reference frames can reduce more redundancy in a video data than single reference frame. However, when multiple reference frames are used for the motion estimation, the error can propagate into adjacent frames if error occurs in a frame. In this paper, analysis of error resilience algorithms with respect to the multiple reference frames is shown and a new error resilience algorithm that is more robust to errors is introduced. The experimental results illustrate that the proposed error resilience algorithm improves efficiency by choosing blocks satisfying both coding efficiency and error robustness at the cost of bit rate overhead.