A real-time chip implementation for adaptive video coding control

The paper presents an adaptive coding control for real-time video coding systems. Based on temporal correlations, the group-of-pictures (GOP) of a video sequence is split into one basic GOP (BGOP) and many adaptive GOPs (AGOPs) and then processed accordingly. The advantage of this method is to improve the coding efficiency, particularly solving the scene change problem. Even if the coding bit rate is over the budget, the coding scheme does not require re-encoding, hence it is especially suitable for real-time coding. Based on the adaptive algorithm, the chip is realized to process the functions of picture type decision, coding rate estimation, quantization scale decision, scene-change detection and coding mode decision in the operation. The gate count of this chip is only about 2000 and its silicon area is 2.85 mm² using a 0.35 μm CMOS process.