Video signal encoding/decoding method and apparatus
View Patent ↗An image signal decoding method according to the present invention comprises the steps of: decoding information indicating whether a current block is encoded using a multi-mode intra prediction; when it is determined that the current block is encoded in the multi-mode intra prediction, dividing the current block into a plurality of partial blocks; and obtaining an intra prediction mode of each of the plurality of partial blocks.
1. A method of decoding an image signal, comprising:
decoding a coefficient of a current block from a bitstream based on a result of comparing a size of the current block and a pre-determined threshold size; and
reconstructing the current block using the decoded coefficient,
wherein when the size of the current block is greater than or equal to the pre-determined threshold size, decoding the coefficient of the current block is performed only on a partial region in the current block, and is not performed on a remaining region except for the partial region in the current block,
wherein when the size of the current block is less than the pre-determined threshold size, decoding the coefficient of the current block is performed on an entire region of the current block,
wherein the partial region is divided into a plurality of partial blocks, and
wherein the coefficient of the partial region is decoded in units of the partial blocks.
2. The method of claim 1 , wherein the threshold size is a N×M size pre-defined at an image decoding apparatus, and
wherein N and M are integers of 8, 16 or more, respectively.
3. The method of claim 1 , wherein the partial region is specified based on at least one of a vertical line or a horizontal line, and
wherein a distance between the vertical line and a left boundary line of the current block is a first distance, and a distance between the horizontal line and a top boundary line of the current block is a second distance.
4. The method of claim 3 , wherein the partial region is representative of a region located to a left of the vertical line or above the horizontal line.
5. The method of claim 3 , further comprising: obtaining information for specifying the partial region, wherein the information includes information of specifying a position of the vertical line or the horizontal line.
6. A method of encoding an image signal, comprising:
generating a current block including residual data, the residual data being a difference between an original block of the current coding block and a prediction block of the current block; and
encoding a coefficient of the current block based on a result of comparing a size of the current block and a pre-determined threshold size,
wherein when the size of the current block is greater than or equal to the pre-determined threshold size, encoding the coefficient of the current block is performed only on a partial region in the current block, and is not performed on a remaining region except for the partial region in the current block,
wherein when the size of the current block is less than the pre-determined threshold size, encoding the coefficient of the current block is performed on an entire region of the current block,
wherein the partial region is divided into a plurality of partial blocks, and
wherein the coefficient of the partial region is encoded in units of the partial blocks.
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:
generating a current block including residual data, the residual data being a difference between an original block of the current block and a prediction block of the current block; and
encoding a coefficient of the current block based on a result of comparing a size of the current block and a pre-determined threshold size,
wherein when the size of the current block is greater than or equal to the pre-determined threshold size, encoding the coefficient of the current block is performed only on a partial region in the current block, and is not performed on a remaining region except for the partial region in the current block,
wherein when the size of the current block is less than the pre-determined threshold size, encoding the coefficient of the current block is performed on an entire region of the current block,
wherein the partial region is divided into a plurality of partial blocks, and wherein the coefficient of the partial region is encoded in units of the partial blocks.