基于內(nèi)容復(fù)雜度的視頻編碼碼率控制
Rate Control Based on Content Complexity in Video Coding
-
摘要: 該文根據(jù)線性模型提出信源內(nèi)容復(fù)雜度的一種度量方式，并以此進(jìn)行幀級(jí)比特分配和宏塊級(jí)的視頻碼率控制。仿真表明該方法與MPEG2中的TM5相比，能比較顯著地提高信噪比，實(shí)現(xiàn)更加準(zhǔn)確的碼率控制，同時(shí)可以在幀間和幀內(nèi)獲得更一致的視覺效果。該算法在MPEG4及低碼率視頻編碼中也是適用的。
-
關(guān)鍵詞:
- 視頻編碼;碼率控制;內(nèi)容復(fù)雜度
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- -
計(jì)量
- 文章訪問數(shù): 2260
- HTML全文瀏覽量: 98
- PDF下載量: 1181
- 被引次數(shù): 0
下載:
