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US 2019/0104303 A1Published application
Control-point based intra direction representation for intra coding
AssigneeVid Scale, Inc.
InventorsXiaoyu Xiu, Yuwen He, Yan Ye
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AssigneeVid Scale, Inc.
InventorsXiaoyu Xiu, Yuwen He, Yan Ye
Estimating the term…
Systems and methods are described for control-point based intra mode for coding a video bitstream. In an exemplary embodiment, at least two control points in a picture are selected. The control points may be, for example, points at or adjacent to two or more corners of a current block. For each of the control points, an associated intra prediction direction is identified. The intra prediction directions may be encoded in the bitstream, e.g. using differential coding. A derived intra prediction direction is interpolated based on a position of a pixel (or of a block) relative to the control points, and the derived intra prediction direction is used to predict one or more samples in the video. Different interpolation techniques, such as triangular interpolation or bilinear interpolation may be used.
A method of coding a video in a bitstream, wherein the video comprises a plurality of frames, each frame comprising blocks of samples, the method comprising:
An encoder for encoding a video into a bitstream, wherein the video comprises a plurality of frames, each frame comprising blocks of samples, the encoder being operative to perform functions comprising:
A decoder for decoding a video from a bitstream, wherein the video comprises a plurality of frames, each frame comprising blocks of samples, the decoder being operative to perform functions comprising:
Dependencies are inferred from the claim text.