# US 11,115,659 B2 · Video signal encoding/decoding method and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,115,659 B2 - Document ID: US11115659B2 - Status: Granted - Kind: B2 - Application number: 17/016,867 - Filed: 2020-09-10 - Published: 2020-12-31 - Granted: 2021-09-07 - Earliest claimed: 2016-04-29 - Assignees: Industry Academy Cooperation Foundation of Sejong University - Applicants: Industry Academy Cooperation Foundation of Sejong University - Inventors: Joo Hee Moon; Sung Won Lim; Dong Jae Won - Web page: https://patentgrep.com/patent/US11115659B2 ## CPC - H04N 19/119: Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks - H04N 19/105: Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction - H04N 19/107: between spatial and temporal predictive coding, e.g. picture refresh - H04N 19/136: Incoming video signal characteristics or properties - H04N 19/176: the region being a block, e.g. a macroblock - H04N 19/463: by compressing encoding parameters before transmission - H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract 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. ## Claims ### Claim 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. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 1) 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. ### Claim 4 (depends on 3) 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. ### Claim 5 (depends on 3) 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. ### Claim 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. ### Claim 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.