Patent ID: 6614936
Filing Date: 2003-09-02
Classification: H04N

Abstract:
A method for coding video data according to layered coding techniques in which the video data is represented as multi-layered frames, each frame having multiple layers ranging from a base layer of low quality to enhancement layers of increasingly higher quality, the method comprising:forming a base layer for frames in the video data; and forming multiple enhancement layers for the frames, selected enhancement layers in a current frame being predicted from at least one lower quality layer in a reference frame that is not the base layer; wherein the forming of the multiple enhancement layers comprises predicting each of the enhancement layers in a current frame from a lower quality reference layer of a reference frame if a relationship holds true, the relationship being: â€ƒL mod N=i mod M â€ƒwhere L is a variable designating a particular enhancement layer, i is a variable designating a particular frame, N is a variable representing a layer group depth of how many layers are predicted from a common reference layer, and M is a variable representing a frame group depth of how many frames are grouped together for prediction purposes.