Rate Control for Low Delay Video Communication of H.264 Standard
Chou-Chen Wang, Chi-Wei Tung · InTech eBooks · 2011
Recent Advances on Video Coding 142 MPEG-4 (ISO/IEC, 1997).Figure 1 shows the rate control scheme for MPEG-2, H.263 and MPEG-4 using rate-distortion (R-D) model.The amount of encoding bits of the current basic units (macroblock: MB) is predicted from the recent encoded basic units.The encoder shown in Fig. 1 can obtain the motion vectors (MV) using motion estimator (ME) and calculate the statistical data of the residual frame with actual mean absolute difference (MAD) after motion compensation (MC).And then, the rate controller can adjust the quantization parameter (QP) according to the rate-quantization (R-Q) model.