Patent ID: 11968373
Assignee: IDEAHUB INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A method of transmitting a bitstream, the method comprising:
transmitting the bitstream generated by a video encoding method;
wherein the video encoding method comprising:
determining a current intra prediction mode associated with a current block;
performing intra-prediction according to the current intra prediction mode associated with the current block to generate a prediction block associated with the current block;
determining a neighboring intra prediction mode associated with a neighboring block, the neighboring block being adjacent to the current block;
encoding, into the bitstream, the current intra prediction mode associated with the current block based on whether the neighboring intra prediction mode associated with the neighboring block has directionality or not;
obtaining a residual block associated with the current block by using the prediction block and the current block;
transforming the residual block to generate transform coefficients by using a discrete cosine transform;
quantizing the transform coefficients to generate quantized transform coefficients; and
encoding, into the bitstream, the quantized transform coefficients,
wherein the encoding the current intra prediction mode associated with the current block comprises:
determining candidate intra prediction modes associated with the current block according to a first set of two or more mathematical expressions, when the neighboring intra prediction mode associated with the neighboring block has no directionality,
determining candidate intra prediction modes associated with the current block according to a second set of two or more mathematical expressions, when the neighboring intra prediction mode associated with the neighboring block has directionality,
encoding the current intra prediction mode associated with the current block based on the candidate intra prediction modes,
wherein the second set of two or more mathematical expressions is different from the first set of two or more mathematical expressions,
wherein the second set of two or more mathematical expressions use the neighboring intra prediction mode associated with the neighboring block, and
the neighboring block includes a left block adjacent to the current block.