상세정보
학술지
Error Concealment Using Intra-Mode Information Included in H.264/AVC-Coded Bitstream
- 발행일
- 200808
- 출처
- ETRI Journal, v.30 no.4, pp.506-515
- ISSN
- 1225-6463
- 출판사
- 한국전자통신연구원 (ETRI)
- 초록
- The H.264/AVC standard has adopted new coding tools such as ultra-prediction, variable block size, motion estimation with quarter-pixel-accuracy, loop filter, and so on. The adoption of these tools enables an H.264/AVC-coded bitstream to have more information than was possible with previous standards. In this paper, we propose an effective spatial error concealment method with low complexity in H.264/AVC intra-frame. From information included in an H.264/AVC-coded bitstream, we use prediction modes of intra-blocks to recover a damaged block. This is because the prediction direction in each prediction mode is highly correlated to the edge direction. We first estimate the edge direction of a damaged block using the prediction modes of the intra-blocks adjacent to a damaged block and classify the area inside the damaged block into edge and flat areas. Our method then recovers pixel values in the edge area using edge-directed interpolation, and recovers pixel values in the flat area using weighted interpolation. Simulation results show that the proposed method yields better video quality than conventional approaches.
- KSP 제안 키워드
- Coding Tools, Edge direction, Edge-directed interpolation, Motion estimation(ME), Pixel Value, Prediction mode, Spatial error concealment, Variable Block Size(VBS), Video quality, Weighted interpolation, intra-frame