One dimensional prediction and transform for intra coding

A new intra coding method based on one dimensional line prediction with one dimensional transform is presented. The H.264/AVC design includes a multidirectional spatial prediction method to reduce spatial redundancy by using neighboring samples as a prediction for all the samples in a block of data to be encoded. In the proposed intra coding method, the spatial prediction is performed based on line by line in horizontal or vertical direction instead of in the block-based manner used in the current H.264/AVC standard, with one dimensional DCT transform for the residuals. Experimental results on CIF (352×288) sequences show that the new line based intra coding framework reduces the bit rate by approximately 4.3% and 7.2% at the same PSNR comparing with H.264/AVC high profile and baseline profile, respectively.