A BU-based rate control design for H.264 and AVS video coding with ROI support

Rate control (RC) techniques play an important role for interactive video coding applications, especially in video streaming applications with bandwidth constraints. In this paper we propose a new BU-level rate control algorithm with ROI support and the associated architecture for H.264 and AVS by exploiting a new predictor model to predict the MAD value and target bits for hardware realization. The proposed algorithm breaks up the sequential processing dependence in the original H.264/AVS RC algorithm and reduces up to 80.6% of internal buffer size for D1 video encoding, while maintaining good video quality.