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TM5码率控制算法的分析和改进

DOI: 10.11834/jig.200507170

Keywords: 码率控制,TM5自适应量化,空间活动度,积分控制

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Abstract:

众所周知,MPEG-2的TM5码率控制算法是一种优秀的码率控制算法,由于它引入了复杂度分析、码率分配、码率控制、自适应量化等概念方法,从而可以较准确地控制视频流的输出码率,鉴于该算法仍有许多不足,为此在对TM5码率控制算法的自适应量化公式的不足之处和码率控制部分的优点和局限性进行分析的基础上;提出了TM5码率控制算法的一种改进方法。实验结果表明,该改进方法不但有效降低了原TM5码率控制算法的复杂度,同时获得了0.8~1.8dB的增益。

References

[1]  Video coding experts group. TMN8 video codec test model near-term version 8[S]. Q15-A-59. Portland,US, 1997-6.
[2]  Ribas-Corbera J, Lei Shawmin. A frame-layer bit allocation for H. 263 + [ J]. IEEE Transactions on Circuits and Systems for Video Technology, 2000,10 ( 7 ): 1154 ~ 1158.
[3]  Li Zhengguo, Pan Feng, Lim Keng pang, et al. Adaptive basic unit layer rate control for JVT[ A]. In: JVT 7th Meeting[ C ], Pattaya,Thailand, 2003-3.
[4]  He Zhihai, S. K. Mitra. A unified rate-distortion analysis framework for transform coding[J]. IEEE Transactions on Circuits and Systems for Video Technology, 2001,11 ( 12 ) :4 ~ 20.
[5]  Test model editing committee. MPEG-2 test model 5 doc [ EB/OL].http ://www. mpeg. org/MPEG/MSSG/tm5/index. html.
[6]  Test sequences [ EB/OL ]. ftp://ftp. crc. ca/crc/vqeg/TestSequences/ThumbNails/index. html.
[7]  Ribas-Corbera J, Lei Shawmin. Rate control in DCT video coding for low-delay communications [ J ]. IEEE Transactions on Circuits and Systems for Video Technology, 1999,9 ( 1 ): 172 ~ 185.
[8]  MPEG-4 video verification model version 18.0[ S]. ISO/IEC JTC1/SC29/WG11 N3908. Pisa,Italy, 2001.
[9]  Chiang Tihao, Zhang Ya-qin. A new rate control scheme using quadratic rate distortion model [ J ]. IEEE Transactions on Circuits and Systems for Video Technology, 1997,7( 1 ) :246 ~ 250.
[10]  Lee Hung-ju, Chiang Tihao, Zhang Ya-qin. Scalable rate control for MPEG-4 video[J]. IEEE Transactions on Circuits and Systems for Video Technology, 2000,10 (6): 878 ~ 894.
[11]  Ma Siwei, Li Zhengguo, Wu Feng. Proposed draft of adaptive rate control[ A]. In: JVT 8th Meeting[ C], Geneva,Switzerland, 2003.
[12]  He Zhihai, Kim Y, Mitra S K. A linear source model and a unified rate control algorithm for DCT video coding [ J ]. IEEE Transactions on Circuits and Systems for Video Technology, 2002, 12 (11):970 ~ 982.
[13]  MPEG softare simulation group. MPEG2v12 reference software [ EB/OL]. http://www. mpeg. org/MPEG/MSSG/index. html#source.

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