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1. (WO2012115487) IMAGE TRANSFORM AND INVERSE TRANSFORM METHOD, AND IMAGE ENCODING AND DECODING DEVICE USING SAME
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2012/115487    International Application No.:    PCT/KR2012/001447
Publication Date: 30.08.2012 International Filing Date: 24.02.2012
IPC:
H04N 7/30 (2006.01)
Applicants: SAMSUNG ELECTRONICS CO., LTD. [KR/KR]; 129, Samsung-ro Yeongtong-gu, Suwon-si Gyeonggi-do 443-742 (KR) (For All Designated States Except US).
HONG, Yoon-mi [KR/KR]; (KR) (For US Only).
KIM, Il-koo [KR/KR]; (KR) (For US Only)
Inventors: HONG, Yoon-mi; (KR).
KIM, Il-koo; (KR)
Agent: Y.P.LEE, MOCK & PARTNERS; 12F Daelim Acrotel 13 Eonju-ro 30-gil, Gangnam-gu Seoul 135-971 (KR)
Priority Data:
61/446,656 25.02.2011 US
Title (EN) IMAGE TRANSFORM AND INVERSE TRANSFORM METHOD, AND IMAGE ENCODING AND DECODING DEVICE USING SAME
(FR) PROCÉDÉ DE TRANSFORMÉE/TRANSFORMÉE INVERSE D'IMAGE, ET DISPOSITIF DE CODAGE ET DE DÉCODAGE D'IMAGE L'UTILISANT
(KO) 영상의 변환 및 역변환 방법, 및 이를 이용한 영상의 부호화 및 복호화 장치
Abstract: front page image
(EN)Disclosed are an image transform/inverse transform method and device. In the image transform method according to the present invention, a trigonometric function comprised in a discrete cosine transform matrix is substituted with a rational number, and transform error due to the substituted discrete cosine transform matrix is minimized by applying a scaling matrix in a scaling process which is carried out together with quantization.
(FR)La présente invention concerne un procédé de transformée/transformée inverse d'image et un dispositif. Dans le procédé de transformée d'image selon la présente invention, une fonction trigonométrique comprise dans une matrice de transformée en cosinus discrète est remplacée par un nombre rationnel, et une erreur de transformée due à la matrice de transformée en cosinus discrète remplacée est réduite par l'application d'une matrice de mise à l'échelle dans un procédé de mise à l'échelle qui est réalisé conjointement avec une quantification.
(KO)영상의 변환/역변환 방법 및 장치가 개시된다. 본 발명에 따른 영상 변환 방법은 이산 코사인 변환 행렬에 포함된 삼각함수를 유리수로 치환하고, 양자화와 함께 수행되는 스케일링 과정에서 스케일링 행렬을 적용하여 치환된 이산 코사인 변환 행렬에 의한 변환 오차를 최소화한다.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, 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, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, 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, ML, MR, NE, SN, TD, TG).
Publication Language: Korean (KO)
Filing Language: Korean (KO)