(12) International Application Status Report

Received at International Bureau: 21 June 2012 (21.06.2012)

Information valid as of: 05 December 2012 (05.12.2012)

Report generated on: 26 January 2021 (26.01.2021)

(10) Publication number: (43) Publication date: (26) Publication language:
WO 2013/00172903 January 2013 (03.01.2013) Japanese (JA)

(21) Application number: (22) Filing date: (25) Filing language:
PCT/JP2012/00375908 June 2012 (08.06.2012) Japanese (JA)

(31) Priority number(s): (32) Priority date(s): (33) Priority status:
2011-143249 (JP)28 June 2011 (28.06.2011) Priority document received (in compliance with PCT Rule 17.1)

(51) International Patent Classification:
H04N 7/26 (2006.01)

(71) Applicant(s):
NEC Corporation [JP/JP]; 7-1, Shiba 5-chome, Minato-ku, Tokyo 1088001 (JP) (for all designated states except US)
AOKI, Hirofumi [JP/JP]; c/o NEC Corporation, 7-1, Shiba 5-chome, Minato-ku, Tokyo 1088001 (JP) (for US only)
CHONO, Keiichi [JP/JP]; c/o NEC Corporation, 7-1, Shiba 5-chome, Minato-ku, Tokyo 1088001 (JP) (for US only)
SENDA, Yuzo [JP/JP]; c/o NEC Corporation, 7-1, Shiba 5-chome, Minato-ku, Tokyo 1088001 (JP) (for US only)

(72) Inventor(s):
AOKI, Hirofumi; c/o NEC Corporation, 7-1, Shiba 5-chome, Minato-ku, Tokyo 1088001 (JP)
CHONO, Keiichi; c/o NEC Corporation, 7-1, Shiba 5-chome, Minato-ku, Tokyo 1088001 (JP)
SENDA, Yuzo; c/o NEC Corporation, 7-1, Shiba 5-chome, Minato-ku, Tokyo 1088001 (JP)

(74) Agent(s):
IWAKABE, Fuyuki; SUNRISE PATENT OFFICE, Yomiurichuko Bldg.6F, 8-7, Kyobashi 2-chome, Chuo-ku, Tokyo 1040031 (JP)

(54) Title (EN): IMAGE ENCODING DEVICE AND IMAGE DECODING DEVICE
(54) Title (FR): DISPOSITIF DE CODAGE D'IMAGES ET DISPOSITIF DE DÉCODAGE D'IMAGES
(54) Title (JA): 映像符号化装置及び映像復号装置

(57) Abstract:
(EN): In the present invention, an image encoding device is provided with a quantization step-size encoding unit (11) for encoding a quantization step size that controls quantization fineness, and a quantization step-size downsampling unit (12) that performs downsampling on one or a plurality of encoded quantization step sizes to generate a quantization step-size representative value. The quantization step-size encoding unit (11) is configured so that the quantization step-size representative value is used to predict a quantization step size.
(FR): La présente invention porte sur un dispositif de codage d'images qui est équipé d'une unité de codage de taille d'étape de quantification (11) destinée au codage d'une taille d'étape de quantification qui commande une finesse de quantification, et d'une unité de sous-échantillonnage de taille d'étape de quantification (12) qui effectue un sous-échantillonnage sur une ou une pluralité de tailles d'étapes de quantification codées de façon à générer une valeur représentative de taille d'étape de quantification. L'unité de codage de taille d'étape de quantification (11) est configurée de sorte que la valeur représentative de taille d'étape de quantification est utilisée pour prédire une taille d'étape de quantification.
(JA):  映像符号化装置は、量子化の粒度を制御する量子化ステップサイズを符号化する量子化ステップサイズ符号化部11と、符号化済みの一つまたは複数の量子化ステップサイズに対してダウンサンプリングを行って量子化ステップサイズ代表値を生成する量子化ステップサイズダウンサンプリング部12とを備えている。量子化ステップサイズ符号化部11は、量子化ステップサイズ代表値を用いて量子化ステップサイズを予測するように構成される。

International search report:
Received at International Bureau: 13 September 2012 (13.09.2012) [JP]

International Report on Patentability (IPRP) Chapter II of the PCT:
Not available

(81) 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
European Patent Office (EPO) : 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 (OAPI) : BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG
African Regional Intellectual Property Organization (ARIPO) : BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW
Eurasian Patent Organization (EAPO) : AM, AZ, BY, KG, KZ, RU, TJ, TM