Perceptual rate control algorithms for low bit-rate video coding

In this paper, a new rate control scheme based on human visual perception is proposed to enhance the visual image quality of very low bit-rate video transmission. With weighted DCT coefficients, the proposed rate control scheme can be easily designed with considerations of both the human visual system and skin enhancement in mind, to achieve a higher visual image quality for human perception. In comparison to the test model 8 (TMN8), which encodes the bits with optimal variance attribution, the proposed coding control scheme is designed to achieve the optimal visual power ascription. Simulation results demonstrate that the proposed coding control scheme encodes the same number of frames with nearly the same PSNR but achieves better visual quality than the TMN8 under the same bit rate constraints.