IMAGE PROCESSING APPARATUS FOR SUPERIMPOSING WINDOWS DISPLAYING VIDEO DATA HAVING DIFFERENT FRAME RATES

摘要

A method of transferring image data to a composite memory space comprises including masking data defining a reserved output area in a first memory space and containing first time-varying data having a first frame rate associated therewith. Second time-varying image data is stored in a second memory space and is associated with a second frame rate. At least part of the first image data is transferred to the composite memory space and at least part of the second image data is transferred to the composite memory. The mask data is used to provide the at least part of the second image data such that, when output, the at least part of the second image data occupies the reserved output area.