A Novel R-D Optimized MB-level Rate Control Scheme for Real-Time Video Coding

  • Authors:

  • Da An;Xin Tong;Yun He

  • Affiliations:

  • Department of Electronic Engineering, Tsinghua National Laboratory for Information Science and Technology, Tsinghua University, Beijing, China;Department of Electronic Engineering, Tsinghua National Laboratory for Information Science and Technology, Tsinghua University, Beijing, China;Department of Electronic Engineering, Tsinghua National Laboratory for Information Science and Technology, Tsinghua University, Beijing, China

  • Venue:
  • Journal of Signal Processing Systems
  • Year:
  • 2014

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Abstract

Rate control has a critical influence on the video encoder design, and MB-level rate control is more flexible to control the spatial coding performance. However, most existing MB-level rate control methods are not designed for hardware implementation, and are too complex for practical use in real-time video coding. In this paper, a simple and effective MB-level rate control scheme is proposed that uses historical rate information to directly assign a QP value to a class of MBs. This paper will also introduce a method to realize the idea and make the pipeline data dependency applicable in circuit design. Experiments show that the proposed classification-based MB-level rate control algorithm can achieve a coding gain up to 0.6 dB and an averaging gain of 0.18 dB.