THE TRANSFORM METHOD AND DEVICE APPLYING FOR VIDEO AND IMAGE PROCESS

摘要

A transform method which is applied for video and image processing includes inverse discrete cosine transform method: a inversed transform preprocess step, one-dimensional inversed transform step, a inversed transform post-process step; another transform method which is applied for video and image processing includes discrete cosine transform method: positive transform preprocess step, one-dimensional positive transform step and positive transform post-process step; and this invention provides a corresponding transform process device. The simpler structure could be used to achieve the discrete cosine transform and inverse discrete cosine transform (DCT/IDCT) according to this invention and lessens the process complexity of video or image and makes higher fidelity. It approximates the ideal IDCT and DCT with much higher fidelity than the demand of associated standards and hence reduces the complication degree of the hardware. The method can be applied to various existing popular international video codec standard.