The purpose of this paper is to improve allocation of the number of bits without skipping the frame by accurately estimating the target bits in H.264/AVC rate control.The scheme proposes an enhancement method of the target frame rate based on H.264/AVC bit allocation.The enhancement uses a frame complexion estimation to improve the existing Mean Absolute Difference（MAD）complexity measurement.Bit allocation to each frame is not just computed by target frame rate but also adjusted by a combined frame complexity measure.Using the statistical characteristic,the scheme obtains change of occurrence bit about QP to apply the bit amount by QP from the video characteristic and apply it in the estimated bit amount of the current frame.Simulation results show that the proposed rate control scheme achieves time saving of more than 99% over existing rate control algorithm.Nevertheless,Peak Signal-to-Noise Ration（PSNR）and bit rate were almost the same as the performances.
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