An adaptable QP-independent approach to rate-distortion optimization for video coding

作者：Yuan Wu^*; Niu Zhen Dong; Lin Shou Xun; Lin Zhi Han; Xie Hui; Luo Hai Yong

来源：Chinese Journal of Computers, 2011, 34(8): 1519-1527.

DOI：10.3724/SP.J.1016.2011.01519

• Coding performance
• Consideration of statistics
• Encoding process
• Heuristic model
• Hybrid coder control
• Hybrid video coding
• Joint mode selection
• Lagrange optimization
• Linear relationships
• Rate-distortion optimal
• Rate-distortion optimization

Currently a QP-based Lagrange Multiplier (QP-L) method is widely used to achieve Rate-Distortion optimal joint mode selection and motion estimation in hybrid video coding. In this work, a novel cost function for RDO is presented, which is independent of QP and adaptable to the statistics. Firstly, it is shown there be a linear relationship between λ of the QP-L method and some functionality about statistic for distortion and rate. Thusly, a heuristic model is presented to determine λ with consideration of statistic for distortion and rate, which is after then theoretically verified. It is shown via extensive experiments that the proposed scheme achieves a better coding performance than the traditional QP-based scheme. Moreover, the proposed scheme promises an easy encoding process, due to the fact that it';s computation does not involve QP.

• 出版日期2011
• 单位北京理工大学