4D-MDCT based adaptive prediction and compensation color video coding

In order to increase the compression ratio of color video sequence, a new adaptive coding method based on four-dimensional matrix theories is proposed in this paper. A four-dimensional matrix model is adopted to describe the color video sequence. 4D-MDCT (four-dimensional matrix DCT) is used to decrease the correlation of intra frames and inter frames. Then, the coefficients are quantized by quantization matrix. To get rid of the correlation between the coefficients further, prediction and compensation are applied to the quantized coefficients. At the same time, the original quantized coefficients of the submatrix are coded too. Select the coding method, which consumes fewer bits, as the final method for each submatrix adaptively. Experimental results show that high compression ratio can be achieved and the high PSNR preserved.