United States Patent 5,959,690
Toebes, VIII , et al. September 28, 1999

Method and apparatus for transitions and other special effects in digital motion video


A method and apparatus for transition effects in digitally compressed motion video, such video complying with the MPEG-1 standard. Transitions between two frames of video are effectuated by selecting a FROM frame and a TO frame, generating a stream of bidirectionally dependent duplicator frames which vary in their motion vector references to the FROM frame and the TO frame according to a predefined pattern, placing the FROM frame in the past buffer of a decoder, placing the TO frame in the future frame of a decoder, feeding the stream of duplicator frames to the decoder, causing the duplicator frames to be displayed, and beginning normal playback of the video stream containing the TO frame at the TO frame position.

Inventors: Toebes, VIII; John A. (Cary, NC), Walker; Douglas J. (Raleigh, NC)
Assignee: SAS Institute, Inc. (
Appl. No.: 08/801,254
Filed: February 19, 1997

Full patent text at USPTO