저속 영상부호화를 위한 최적 프레임 율과 공간 양자화 결정

An Optimal Selection of Frame Skip and Spatial Quantization for Low Bit Rate Video Coding

  • Bu, So-Young (Image Processing Lab, Dept.of Information Communication, Ewah Wonan's University) ;
  • Lee, Byung-Uk (Image Processing Lab, Dept.of Information Communication, Ewah Wonan's University)
  • 발행 : 2004.06.01

초록

본 논문에서는 낮은 전송률에서 공간적 시간적 해상도를 tradeoff하는 새로운 비디오 코딩 알고리듬을 제안한다. 먼저 영상의 움직임을 측정하여 최적의 frame rate를 선택한다. DCT quantization parameter (QP)는 앞에서 결정된 frame rate와 주어진 bit rate에 따라 결정한다. 마지막으로, 본 논문은 skip된 비디오 영상에 대해 단순하고 효과적인 distortion 측정방법을 제안한다. 실험결과, 제안한 알고리듬이 H.263 TMN5 보다 영상 품질이 2 ㏈ 정도 개선되었다.

We present a new video coding technique to tradeoff frame rate and picture quality for low bit rate video coding. We show a model equation for selecting the optimal frame rate from the motion content of the source video. We can determine DCT quantization parameter (QP) using the frame rate and bit rate. For objective video quality measurement we propose a simple and effective error measure for skipped frames. The proposed method enhances the video quality up to 2 ㏈ over the H.263 TMN5 encoder.

키워드

참고문헌

  1. Video Processing and Communications Wang Yao;Ostermann Jorn;Zhang Ya Qin
  2. IEEE transactions on circuits and systems for video technology v.8 no.7 H.263+; video Coding at Low Bit Rates Berna Erol;Michael Gallant
  3. Digital Coding of Waveforms N.S.Jayant;Peter Noll
  4. International Conference on Image Processing Rate-Distortion Optimized Video Coding considering Frameskip Anthony Vetro;Yao Wang;Huifang Sun
  5. International Conference on Image Processing Complexity Reduction of Joint Temporal-spatial Bit allocation Using R-D Models for Video Streaming Shan Liu;C.C.Jay Kuo
  6. Proceedings of Ninth ACM International Conference on Multimedia Scene Context Dependent Rate Control Anthony G.Nguyen;Jeng Neng Hwang