Improved bit-allocation and rate-control algorithm based on TM5

An improved frame-level bit-allocation and rate-control algorithm is proposed aiming at overcoming the drawbacks of TM5 rate-control algorithm such as poor rate-control precision, high computational complexity and so on. The frame-level target bit-allocation method is improved and a new rate-distortion model is incorporated to implement rate-prediction. Experiments are conducted and the results show that, compared with the original TM5 algorithm, the new algorithm not only can enhance the rate-control precision but also can reduce the complexity and the fluctuation of decoded image quality.