VIDEO COMPRESSION CODING DEVICE AND DECODING DEVICE APPLIED WITH MOTION COMPENSATION TECHNIQUE USING SELECTIVE REFERENCE FRAME, AND METHOD FOR DETERMINING SELECTIVE REFERENCE FRAME FOR MOTION COMPENSATION

摘要

The present invention relates to a method for generating a reference frame of a video CODEC for implementing motion compensation through motion estimation. In the case of each frame of resultant images photographed by a video apparatus, motion blurs of a certain direction are generated on a considerable number of frames due to the number of frames per second (FPS) of a camera, external factors such as shutter speed, movements of a photographing apparatus, shaking of the hand or the like, or to the movements or the like of an object to be photographed. When motion estimation is performed for said frames, if motion blurring occurs on reference frames and input frames do not have motion blurring, or if there is no motion blurring on the reference frames but the input frames have motion blurring, difference image values are set to be large, resulting in low compression efficiency. The present invention forms, on the reference frames, additional various reference frames, which have performed intentional motion blur and motion deblur filtering functions, and selects reference frames having low difference image data during the execution of the motion estimation as final reference frames among the original reference frames and the added various reference frames, thereby increasing compression efficiency.