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Video encoding/decoding method and device

專利號
US11659163B2
公開日期
2023-05-23
申請人
INDUSTRY ACADEMY COOPERATION FOUNDATION OF SEJONG UNIVERSITY（KR Seoul）
發(fā)明人
Jong Ki Han; Sang Guk Cha; Geon Won Lee; Geun Bae Kim
IPC分類
H04N19/159; H04N19/105; H04N19/176; H04N19/46
技術(shù)領(lǐng)域
mpm,prediction,candidate,mode,intra,may,group,be,block,unit
地域： Seoul

摘要

A video encoding/decoding device according to the present invention may determine an intra prediction mode of a current block on the basis of a most probable mode (MPM) of the current block or an intra prediction mode of a neighboring block, determine a reference region for intra prediction of the current block, and perform intra prediction on the current block by using the intra prediction mode and the reference region.

說明書

For example, when a mode value of a MPM is greater than or equal to a base mode value, an operation which subtracts a predetermined value of m from a MPM may be performed and otherwise, an operation which adds a predetermined value of m to a MPM may be performed. Conversely, when a mode value of a MPM is greater than or equal to a base mode value, an operation which adds a predetermined value of m to a MPM may be performed and otherwise, an operation which subtracts a predetermined value of m from a MPM may be performed.

Meanwhile, i base mode values may be used. Herein, a value of i may be 1, 2, 3, 4, or 5. For example, when a value of i is 2, base mode values may include a first base mode value and a second base mode value. In this case, a first base mode value may be any one of the above-described 5 modes and a second base mode value may be another of 5 modes.

In an example, in reference to FIG. 4A, a second candidate group may include a mode corresponding to a value which subtracts 32 from a mode value of a MPM when a MPM is greater than mode 34. In reference to FIG. 4B, a second candidate group may include mode 2 and mode 66 when a MPM is mode 34. A second candidate group may include a mode corresponding to a value which adds 32 to a mode value of a MPM when a MPM is less than mode 34.

In addition to a mode derived based on a MPM, a second candidate group may further include its neighboring mode (embodiment 2). A neighboring mode may be determined by adding or subtracting an integer such as 1, 2, 3, or more to or from a mode derived based on a MPM.

權(quán)利要求

1
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