基于内容复杂度的视频编码码率控制
Rate Control Based on Content Complexity in Video Coding
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摘要: 该文根据线性模型提出信源内容复杂度的一种度量方式，并以此进行帧级比特分配和宏块级的视频码率控制。仿真表明该方法与MPEG2中的TM5相比，能比较显著地提高信噪比，实现更加准确的码率控制，同时可以在帧间和帧内获得更一致的视觉效果。该算法在MPEG4及低码率视频编码中也是适用的。
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关键词:
- 视频编码;码率控制;内容复杂度
Abstract: A new video rate control scheme which uses linear source model as content complexity measure of video frames is proposed in this paper to implement bit allocation between frames and rate control over Micro Btocte(MB) level in one frame. Comparing with TM5, simulation results show that the proposed method can improve PSNR obviously and achieve more accurate rate control as well as more smooth objective and subjective visual quality even when scenes change. This algorithm is also applicable in MPEG4 and low rate video coding. -
ISO-IEC/JTC1/SC29/WG11. Generic coding of moving pictures and associated audio information: Video. ISO-IEC 13818-2, Nov. 1994.[2]ISO-IEC/JTC1/SC29/WG11.Coding of Audio/Visual Objects: Vide. ISO-IEC 14496-2, 1999.[3]ITU-T, Study Group 15. Draft of recommendation H.263: Video coding for low bit rate communication. May 2, 1996.[4]Document ISO-IEC/JTC/SC29/WG11. Test Model 5. Draft, Apr. 1993.[5]Hong S H, et al.. Rate control of MPEG video for consistent picture quality[J].IEEE Trans. on Broadcasting.2003, 49(1):1-[6]Hoang D T.[J].Vitter J S. Efficient Algorithms for MPEG Video Compression. New York, USA: John Wiley Sons.2002,:-[7]He Z H, Mitra S K. A linear source model and a unified rate control algorithm for DCT video coding[J].IEEE Trans. on Syst. Video Technol.2002, 12(11):970-[8]Corbera J R, Lei S M. Rate control in DCT video coding for low-delay communications[J].IEEE Trans. on Syst. Video Technol.1999, 9(1):172- -
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