Owing to digital television image diversification

there is no better enhancement method to enhance the image.An improved video quality enhancement algorithm is presented and the hardware circuit is designed in this paper.Unlike traditional histogram equalization approaches

the input images are divided into different classes by analyzing the information of input images and the contrast is adjusted in YUV color space firstly.Then the adjusted images would be processed as follows:the dynamic range is adjusted in RGB color space

the luminance is amended and the saturation is compensated in HSV color space.The VLSI(Very Large Scale Integrated circuit) hareware circuit of the algorithm is designed with Verilog

and it is verified based on the FPGA(Field-Programmable Gate Array) video verification platform.The experimental results show that the presented algorithm can adapt the pictures of different scenes and the enhanced images are more clear and vivid.