Patent ID: 7133449
Filing Date: 2006-11-07
Classification: H04N

Abstract:
1. A method of encoding a video stream to conserve memory, the method comprising: receiving the video stream; generating a base bitstream comprising one or more base video object planes (VOPs) using the video stream, each base VOP being associated with a base presentation time stamp (PTS) and a base decoding time stamp (DTS); generating a fine granularity scalability (FGS) bitstream comprising one or more FGS VOPs using the video stream, each FGS VOP being associated with a corresponding base VOP, an FGS DTS, and an FGS PTS; and generating an FGS temporal scalability (FGST) bitstream comprising one or more FGST VOPs using the video stream, each FGST VOP being associated with two corresponding base VOPs, an FGST DTS, and an FGST PTS, wherein the FGS DTS and the FGS PTS associated with each FGS VOP are selected to be equal to one another, wherein the FGST DTS and the FGST PTS associated with each FGST VOP are selected to be equal to one another, wherein the FGS PTS associated with each FGS VOP is selected to be equal to the base PTS associated with its corresponding base VOP, wherein the FGS DTS is selected to be different from any of the FGST DTSs, and wherein the FGS DTS associated with each FGS VOP is selected to be equal to the base DTS associated with one of the base VOPs.