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1. (WO2007011160) APPARATUS AND METHOD OF EMBEDDED QUANTIZATON FOR THE IMPROVED SNR SCALBILTY
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/011160 International Application No.: PCT/KR2006/002829
Publication Date: 25.01.2007 International Filing Date: 19.07.2006
IPC:
H04N 7/30 (2006.01) ,H04N 7/26 (2006.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
7
Television systems
24
Systems for the transmission of television signals using pulse code modulation
26
using bandwidth reduction
30
involving transform coding
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
7
Television systems
24
Systems for the transmission of television signals using pulse code modulation
26
using bandwidth reduction
Applicants:
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE [KR/KR]; 161 Gajeong-dong, Yusong-gu Daejeon-city 305-350, KR (AllExceptUS)
CHOI, Hae-Chul [KR/KR]; KR (UsOnly)
KIM, Jae-Gon [KR/KR]; KR (UsOnly)
HONG, Jin-Woo [KR/KR]; KR (UsOnly)
KO, Sung-Je [KR/KR]; KR (UsOnly)
Inventors:
CHOI, Hae-Chul; KR
KIM, Jae-Gon; KR
HONG, Jin-Woo; KR
KO, Sung-Je; KR
Agent:
Y.P.LEE, MOCK & PARTNERS; 1575-1 Seocho-dong, Seocho-gu Seoul 137-875, KR
Priority Data:
10-2005-006548419.07.2005KR
10-2005-009581812.10.2005KR
10-2006-006709318.07.2006KR
Title (EN) APPARATUS AND METHOD OF EMBEDDED QUANTIZATON FOR THE IMPROVED SNR SCALBILTY
(FR) DISPOSITIF ET PROCEDE DE QUANTIFICATION INTEGREE PERMETTANT D'OBTENIR UN MEILLEUR RAPPORT SIGNAL-BRUIT
Abstract:
(EN) Provided are a method and apparatus for enhancing coding efficiency by performing encoding and decoding by optimally calculating quantization intervals and reconstruction values through a distribution of DCT coefficients of each frame, when DCT coefficients of each SNR enhancement layer are quantized in scalable video coding. The encoding apparatus includes: an R-D optimization unit performing Rate-Distortion (R-D) optimization based on a distribution of Discrete Cosine Transform (DCT) coefficients of each slice and calculating a first reference value and a second reference value respectively indicating a start point and an end point of DCT coefficients quantized to '0'; a quantization interval setting unit setting adaptive quantization intervals on the basis of a minimum value and a maximum value of the DCT coefficients, the first reference value, and the second reference value; and a mapping unit mapping the DCT coefficients to the adaptive quantization intervals.
(FR) Procédé et dispositif permettant d'accroître l'efficacité du codage. Pour le codage et le décodage, on calcule de manière optimale des intervalles de quantification et des valeurs de reconstruction via une distribution des coefficients de transformées en cosinus discrètes (DCT) de chaque séquence lorsque les coefficients DCT de chaque couche d'amélioration de rapport signal-bruit sont quantifiés dans un codage vidéo redimensionnable. Le dispositif de codage se compose comme suit: unité d'optimisation du taux de distorsion (RD) à partir d'une distribution des coefficients de transformées en cosinus discrètes de chaque tranche et du calcul d'une première valeur de référence et d'une seconde valeur de référence indiquant respectivement un point de départ et un point final des coefficients DCT quantifiés à '0'; unité de fixation d'intervalles de quantification fixant de tels intervalles adaptatifs à partir d'une valeur minimum et d'une valeur maximum des coefficients DCT, de la première valeur de référence et de la seconde valeur de référence; et unité de mappage reportant les coefficients DCT sur les intervalles de quantification adaptatifs.
front page image
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: Korean (KO)
Also published as:
US20080193033