An adaptive content based H.264/AVC rate control in low bit rate video

作者：Chen Fu Chuang; Hsu Yi Pin^*

来源：AEU-International Journal of Electronics and Communications, 2011, 65(6): 516-522.

DOI：10.1016/j.aeue.2010.07.010

• Laplacian based model
• Rate control
• JVT-G012
• Histogram based detector

In this paper, we analyze a rate control formula, which is Laplacian based model, then propose a content based equation for an enhanced JVT-G012 algorithm. Based on the simple and fast characteristics of the JVT-G012 algorithm, which is very suitable for real time embedded systems, we integrate the equation into the JVT-G012 algorithm to create an efficient quantizer. However, active local motion will produce error distortion and influence the determination of the quantization parameter. To solve this problem, a modified histogram based detector is proposed. Combining this detector with the equation refines the predicted quantization parameter more precisely. It is shown both theoretically and experimentally that a well-designed quantizer not only improves video quality, but also maintains the designed bit rate budget. In addition, our algorithm can achieve superior results to existing algorithms-up to 0.72 dB without large computation loading.

• 出版日期2011