A direct non-buffer rate control algorithm for real time video compression

作者：Sun Yu^*; Feng Zhidan; Ginnavaram Reshma R

来源：Multimedia Tools and Applications, 2015, 74(17): 6623-6639.

DOI：10.1007/s11042-014-1913-6

• Rate control
• PID bit controller
• Bit allocation
• Video compression

Rate control (RC) is crucial in controlling compression bitrates and encoding qualities for networked video applications. In this paper, we propose a direct non-buffer real-time rate control algorithm for video encoding, which has two unique features. First, unlike traditional algorithms which adopt buffers in rate control, the proposed algorithm does not use a buffer in rate regulation which can reduce the delay and improve real-time response. Second, we propose a new Proportional-Integral-Derivative (PID) bit controller to directly control encoding bitrates. In addition, we also develop a simple but effective method for real-time target bit allocation. To the best of our knowledge, this is the first work that conducts video rate control without using a buffer. Our extensive experimental results have demonstrated that the proposed algorithm outperforms the MPEG-4 rate control algorithm by achieving more accurate rate regulation and improving overall coding quality.

• 出版日期2015-9