상세정보
학술지
Efficient MPEG-4 to H.264/AVC Transcoding with Spatial Downscaling
- 발행일
- 200712
- 출처
- ETRI Journal, v.29 no.6, pp.826-828
- ISSN
- 1225-6463
- 출판사
- 한국전자통신연구원 (ETRI)
- 협약과제
- 07MB2800, 온칩 네트워크 기반 SoC Platform 개발, 조한진
- 초록
- Efficient downscaling in a transcoder is important when the output should be converted to a lower resolution video. In this letter, we suggest an efficient algorithm for transcoding from MPEG-4 SP (with simple profile) to H.264/AVC with spatial downscaling. First, target image blocks are classified into monotonous, complex, and very complex regions for fast mode decision. Second, adaptive search ranges are applied to these image classes for fast motion estimation in an H.264/AVC encoder with predicted motion vectors. Simulation results show that our transcoder considerably reduces transcoding time while video quality is kept almost optimal.
- KSP 제안 키워드
- Adaptive Search, Efficient algorithms, Fast Mode Decision, Fast motion estimation, H.264/AVC encoder, Motion Vector(MV), Motion estimation(ME), Mpeg-4, Video quality, simulation results, spatial downscaling