# US 11,122,265 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 11,122,265 B2 - Document ID: US11122265B2 - Status: Granted - Kind: B2 - Application number: 17/016,940 - Filed: 2020-09-10 - Published: 2020-12-31 - Granted: 2021-09-14 - 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/US11122265B2 ## 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: receiving a bitstream including the image signal; decoding division type information for a first coding block from the bitstream; dividing, based on the division type information, the first coding block into a plurality of second coding blocks; determining an intra prediction mode for each of the second coding blocks; and performing intra prediction on each of the second coding blocks using the determined intra prediction mode, wherein when the first coding block is divided into two second coding blocks according to the division type information, the first coding block is divided based on one reference line, wherein when the first coding block is divided into three second coding blocks according to the division type information, the first coding block is divided based on two reference lines, wherein one of the three second coding blocks has a size greater than a size of the other two of the three second coding blocks, wherein the other two of the three second coding blocks have the same size, wherein a size of the one of the three second coding blocks is twice a size of the other two of the three second coding blocks, and wherein the one of the three second coding blocks is located between the other two of the three second coding blocks. ### Claim 2 (depends on 1) The method of claim 1, wherein the two reference lines is representative of either vertical reference lines or horizontal reference lines. ### Claim 3 (depends on 1) The method of claim 1, wherein the one reference line cross a center of the first coding block while the two reference lines do not cross the center of the first coding block. ### Claim 4 A method of encoding an image signal, comprising: receiving a picture of the image signal; determining a division type for a first coding block in the picture; dividing, based on the division type, the first coding block into a plurality of second coding blocks; and encoding each of the second coding blocks, wherein when the first coding block is divided into two second coding blocks according to the division type, the first coding block is divided based on one reference line, wherein when the first coding block is divided into three second coding blocks according to the division type, the first coding block is divided based on two reference lines, wherein one of the three second coding blocks has a size greater than a size of the other two of the three second coding blocks, wherein the other two of the three second coding blocks have the same size, wherein a size of the one of the three second coding blocks is twice a size of the other two of the three second coding blocks, and wherein the one of the three second coding blocks is located between the other two of the three second coding blocks. ### Claim 5 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: receiving a picture of the image signal; determining a division type for a first coding block in the picture; dividing, based on the division type, the first coding block into a plurality of second coding blocks; and encoding each of the second coding blocks, wherein when the first coding block is divided into two second coding blocks according to the division type, the first coding block is divided based on one reference line, wherein when the first coding block is divided into three second coding blocks according to the division type, the first coding block is divided based on two reference lines, wherein one of the three second coding blocks has a size greater than a size of the other two of the three second coding blocks, wherein the other two of the three second coding blocks have the same size, wherein a size of the one of the three second coding blocks is twice a size of the other two of the three second coding blocks, and wherein the one of the three second coding blocks is located between the other two of the three second coding blocks.