Patent ID: 11910094
Assignee: B1 INSTITUTE OF IMAGE TECHNOLOGY, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 6:
7. A non-transitory computer-readable medium for storing data associated with an image signal, comprising:
a data stream encoded by an encoding method,
wherein the encoding method comprises:
dividing a coding block in the current image to obtain one or more sub-blocks;
determining a transform method among a plurality of transform methods, the determined transform method being encoded based on information for transform into a bitstream:
obtaining transform coefficients of a first sub-block by performing transform on a residual signal of the first sub-block based on the determined transform method, the first sub-block belonging to the one or more sub-blocks;
obtaining quantized transform coefficients of the first sub-block by performing quantization on the transform coefficients of the first sub-block; and
generating the bitstream by encoding the quantized transform coefficients of the first sub-block,
wherein the residual signal is obtained based on a prediction signal corresponding to the residual signal,
wherein the prediction signal is generated by determining a prediction method for the coding block, and performing prediction for the coding block based on the determined prediction method,
wherein the determined prediction method is encoded into the bitstream using prediction information,
wherein coding information for dividing the coding block is encoded into the bitstream,
wherein the coding information includes at least one of a first flag indicating whether to divide the coding block to obtain the one or more sub-blocks, a second flag indicating whether to divide the coding block asymmetrically, or a third flag indicating whether a division direction for the coding block is a horizontal direction or a vertical direction,
wherein, in case the coding block is divided asymmetrically, the first sub-block having a ¼ size of the coding block is obtained, and
wherein obtaining the quantized transform coefficients of the first sub-block comprises:
selecting one of a plurality of weight set candidates pre-defined in the encoding apparatus; and
performing the quantization on the transform coefficients of the first sub-block based on the selected weight set candidate.