A Novel Rate Control for H.264 with Adaptive Rounding Offset Determination

Rate control algorithm is of great importance to video coding. Many existing schemes are based on the quadratic rate control scheme. The proposed method introduces a novel rate control algorithm with adaptive rounding offset, aiming at achieving bit-rate optimization and adaptation of the content of the video sequences. The rounding offset is chosen adaptively based on the minimum blocks´ discontinuities at the boundaries simply. The experimental results show that compared with a dead-zone adjustment which is H.264/AVC compliant, the proposed method can achieve considerable improvement on both objective peak signal noise ratio (PSNR) and subjective visual quality.