KR2017009540 INTRA PREDICTION METHOD AND APPARATUS IN IMAGE CODING SYSTEM

1. (WO2018062702) INTRA PREDICTION METHOD AND APPARATUS IN IMAGE CODING SYSTEM

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Pub. No.:		WO/2018/062702		International Application No.:		PCT/KR2017/009540
Publication Date:		05.04.2018		International Filing Date:		31.08.2017

IPC:

H04N 19/593 (2014.01), H04N 19/105 (2014.01), H04N 19/176 (2014.01)

Applicants:

LG ELECTRONICS INC. [KR/KR]; 128, Yeoui-daero, Yeongdeungpo-gu Seoul 07336 (KR)

Inventors:

HEO, Jin; (KR).
JANG, Hyeongmoon; (KR)

Agent:

ENVISION PATENT & LAW FIRM; 5F, 124, Teheran-ro Gangnam-gu Seoul 06234 (KR)

Priority Data:

62/401,897

30.09.2016

Title

(EN) INTRA PREDICTION METHOD AND APPARATUS IN IMAGE CODING SYSTEM
(FR) PROCÉDÉ ET APPAREIL DE PRÉDICTION INTRA DANS UN SYSTÈME DE CODAGE D'IMAGES
(KO) 영상 코딩 시스템에서 인트라 예측 방법 및 장치

Abstract:

(EN)The intra prediction method according to the present invention comprises the steps of: deriving an intra prediction mode of a current block; deriving neighboring reference samples of the current block; and generating a prediction sample of the current block on the basis of linear interpolation of a first neighboring reference sample positioned in the prediction direction of the intra prediction mode, and a second neighboring reference sample positioned in the opposite direction of the prediction direction, among the neighboring reference samples of the current block, wherein the neighboring reference samples include left neighboring reference samples, left upper neighboring reference samples, upper neighboring reference samples, right neighboring reference samples, right lower neighboring reference samples, and lower neighboring reference samples of the current block. The present invention can improve intra prediction performance, and thereby reduce the amount of data required for residual information and increase the overall coding efficiency.
(FR)La présente invention concerne un procédé de prédiction intra comprenant les étapes consistant : à dériver un mode de prédiction intra d'un bloc actuel; à dériver des échantillons de référence voisins du bloc actuel; et à générer un échantillon de prédiction du bloc actuel, en fonction d'une interpolation linéaire d'un premier échantillon de référence voisin, positionné dans la direction de la prédiction du mode de prédiction intra et d'un deuxième échantillon de référence voisin, positionné dans la direction opposée à la direction de prédiction, parmi les échantillons de référence voisins du bloc actuel, les échantillons de référence voisins comprenant des échantillons de référence voisins gauches, des échantillons de référence voisins gauches supérieurs, des échantillons de référence voisins supérieurs, des échantillons de référence voisins droits, des échantillons de référence voisins droits inférieurs et des échantillons de référence voisins inférieurs du bloc actuel. La présente invention permet d'améliorer les performances de la prédiction intra et de réduire ainsi la quantité de données requises pour des informations résiduelles et d'augmenter l'efficacité de codage globale.
(KO)본 발명에 따른 인트라 예측 방법은 현재 블록의 인트라 예측 모드를 도출하는 단계, 상기 현재 블록의 주변 참조 샘플들을 도출하는 단계, 및 상기 현재 블록의 주변 참조 샘플들 중 상기 인트라 예측 모드의 예측 방향에 위치하는 제1 주변 참조 샘플 및 상기 예측 방향의 반대 방향에 위치하는 제2 주변 참조 샘플의 선형 보간을 기반으로 상기 현재 블록의 예측 샘플을 생성하는 단계를 포함하되, 상기 주변 참조 샘플들은 상기 현재 블록의 좌측 주변 참조 샘플들, 좌상측 주변 참조 샘플들, 상측 주변 참조 샘플들, 우측 주변 참조 샘플들, 우하측 주변 참조 샘플들, 및 하측 주변 참조 샘플들을 포함함을 특징으로 한다. 본 발명에 따르면 인트라 예측 성능을 높여 레지듀얼 정보에 필요한 데이터량을 줄일 수 있고, 전반적인 코딩 효율을 높일 수 있다.

Designated States:

AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG).

Publication Language:	Korean (KO)
Filing Language:	Korean (KO)

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