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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
技術領域
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

mpm[3] 2 + ((intraPredModeX + 62)%65) mpm[4] 2 + ((intraPredModeX ? 1)%65) mpm[5] 2 + ((intraPredModeX + 61)%65)
(6) When any One of intraPredModeL and intraPredModeA is a Directional Mode and the Other is a Planar Mode

The MPM of a current block may include a directional mode (intraPredModeX) of intraPredModeL or intraPredModeA, a default mode, a mode derived by subtracting 1 from intraPredModeX, a mode derived by adding 1 to intraPredModeX and a mode derived by subtracting or adding 2 from or to intraPredModeX.

An index may be assigned to the MPM based on a predetermined priority. For example, an index may be assigned to each MPM as in the following Table 7. But, a priority of the present disclosure is not limited to Table 7 and a position of a MPM in a candidate mode list may be different from Table 7. For example, PLANAR may have a higher priority than intraPredModeX. DC may have a higher priority than PLANAR. DC may have a higher priority than intraPredModeX.

TABLE 7 mpm[0] intraPredModeX mpm[1] PLANAR

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