Method and device for simplifying the encoding and decoding of ultra-high definition images

A video decoding method comprising:

• generating a first prediction block for a current block by performing prediction for the current block;
• and
• generating a reconstructed block for the current block based on a residual block and the first prediction block for the current block,
• wherein the first prediction block for the current block is generated based on a prediction block generation method for the current block,
• wherein the prediction block generation method for the current block is determined based on a plurality of prediction block generation methods for a plurality of adjacent blocks which are spatially adjacent to the current block,
• wherein the plurality of the prediction block generation methods for the plurality of the adjacent blocks are used to generate a plurality of second prediction blocks for the plurality of the adjacent blocks, respectively,
• wherein the prediction block generation method for the current block is determined based on the number of one or more different values of the plurality of the prediction block generation methods for the plurality of the adjacent blocks,
• wherein the first prediction block for the current block is equal to a specific decoded block indicated by difference information,
• wherein a bitstream comprises comprising the difference information is generated,
• wherein the difference information indicates a position difference from a position of the current block to a position of the specific decoded block,
• wherein a size of the first prediction block is 16×16, and
• wherein a size of the specific decoded block is 16×16.

A non-transitory computer-readable medium for storing a bitstream for decoding a video, the bitstream comprising:

• transformed and quantized residual block information;
• and
• difference information,
• wherein a residual block is generated based on the transformed and quantized residual block information,
• wherein a reconstructed block for a current block is generated based on the residual block and a first prediction block for the current block,
• wherein the first prediction block for the current block is generated by performing prediction for the current block,
• wherein the first prediction block is generated based on a prediction block generation method for the current block,
• wherein the prediction block generation method for the current block is determined based on a plurality of prediction block generation methods for a plurality of adjacent blocks which are spatially adjacent to the current block,
• wherein the plurality of the prediction block generation methods for the plurality of the adjacent blocks are used to generate a plurality of second prediction blocks for the plurality of the adjacent blocks, respectively,
• wherein the prediction block generation method for the current block is determined based on the number of one or more different values of the plurality of the prediction block generation methods for the plurality of the adjacent blocks,
• wherein the first prediction block for the current block is equal to a specific decoded block indicated by difference information,
• wherein a bitstream comprising the difference information is generated,
• wherein the difference information indicates a position difference from a position of the current block to a position of the specific decoded block,
• wherein a size of the first prediction block is 16×16, and
• wherein a size of the specific decoded block is 16×16.