Method and apparatus for transitions and other special effects in digital motion video
Toebes, J. A., & Walker, D. J. (1999). IPC No. U.S.Method and apparatus for transitions and other special effects in digital motion video (Patent No. 5959690.)
A method and apparatus for transition effects in digitallycompressed motion video, such video complying with the MPEG-1standard. Transitions between two frames of video are effectuatedby selecting a FROM frame and a TO frame, generating a stream ofbidirectionally dependent duplicator frames which vary in theirmotion vector references to the FROM frame and the TO frameaccording to a predefined pattern, placing the FROM frame in thepast buffer of a decoder, placing the TO frame in the future frameof a decoder, feeding the stream of duplicator frames to thedecoder, causing the duplicator frames to be displayed, andbeginning normal playback of the video stream containing the TOframe at the TO frame position.