Patent ID: 11863750
Assignee: DOLBY LABORATORIES LICENSING CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A video decoding method performed by a video decoding apparatus, the method comprising:
determining that intra skip coding is not applied to a current block;
obtaining, at least partly based on the determination that the intra skip coding is not applied to the current block, information from a bitstream specifying that a contour mode based intra prediction is applied to the current block;
deriving, at least partly in response to the information from the bitstream, a first depth value relating to the current block by performing the contour mode based intra prediction for the current block;
deriving, based on the first depth value, a first index value using a first look up table specifying an index value corresponding to a depth value;
deriving a second index value using the first index value and a residual index value, wherein the residual index value specifies a difference between the first index value and the second index value;
obtaining a second depth value relating to the current block based on the second index value and a second look up table specifying a depth value corresponding to an index value;
generating the prediction block for the current block based on the second depth value; and
reconstructing the current block based on a prediction block that is generated by the contour mode based intra prediction.