RANDOM ACCESS METHOD FOR BLOCKS OF VIDEO IMAGES

摘要

During image processing of video pictures, it is generally necessary to have fast, repeated access to adjacent picture blocks. Picture memories with a sufficient capacity to store complete video pictures do not have the necessary access time to perform image processing in real time. The invention therefore provides for the writing of picture blocks from a picture memory to a fast access memory. Only the pixels in the access memory are accessed when the image processing operation is performed. During the read-out, a further block from the picture memory is simultaneously read into the access memory. As a result, fast access to the picture data is possible in conjunction with little additional outlay in respect to memory. Areas of application for the method are in the image processing of video pictures.