Abstract:

Rate control is an essential component of the video coding technology, focusing on providing the minimum distortion of video image quality under the limited bandwidth of communication as much as possible. It is developed as a research hot spot. The work is meant for the new generation of audio video coding standard (AVS2) in the rate control technology, combining the fuzzy control theory and the rate control, a new rate control algorithm is proposed. First, a fast lookup table is created depending on the principle of the industrial fuzzy controller. Second, a mapping from the functional domain to the internal domain is created. Third, an incremental quantization parameter (QP) value can be found when taking the hypothetical reference decoder buffer values and its error values into the fuzzy controller query. Finally, the encoder adopts the system QP with its increment. The experimental results show that, under the common test condition, the rate control algorithm can achieve significant BDrate gain and maintain high bit rate accuracy. The proposed algorithm is applied simply with low computational complexity. This proposal particularly suitable for constant target bit rate control. This work is approved by the AVS2 standard working group and integrated into the reference software model RD10.0.