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(11)    Patent No :    AP 2186   
(21)    Application No :    AP/P/2006/003836   
(22)    Filing Date :    07.06.2005   
(24)    Date of Grant &    10.12.2010   
           
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
KR    10-2004-004139    07.06.2004
    9   
KR    10-2004-005834    26.07.2004
    9   

(84)    Designated State

BW    GM    GH    KE    LS    MW  MZ   NA   SL
SD    SZ    T Z    UG    ZM    ZW
 

(73) Applicant(s)

DAEYANG FOUNDATION, 98 Kunja-dong, Kwangjin-gu,

Seoul 143-747,
Republic Of Korea

SAMSUNG ELECTRONIC CO., LTD, 416, Maetan-dong,
Yeongtong-gu, Suwon-si, Gyeonggi-do, 442-742,

Republic Of Korea

(72) Inventors

LEE Yung-Lyul, Republic Of Korea

HAN Ki- Hoon, Republic Of Korea

LEE Yung-ki, Republic Of Korea

et al

(74) Representative

HONEY & BLANCKENBERG
 

(51)  International  Classification   H04N 7/12 (2006.01)    H04N 7/32 (2006.01)

(54)    Title

Method and apparatus for lossless encoding and decoding

(57)    Abstract

A lossless moving picture encoding and decoding method and apparatus are provided by which when intra prediction of a block with a predetermined size is performed, the compression ratio is increased by using a pixel in a block to be predicted. The lossless moving picture encoding method includes: predicting each of pixel values in an M x N block to be predicted by using a pixel in the M x N block closest to the object pixel value in a prediction direction determined by an encoding mode; and entropy coding a difference between the predicted pixel value and the pixel value to be predicted. According to this method, the compression ratio becomes much higher than that of a conventional lossless encoding method.

(56)    Documents Cited :    US 20030223496 A1    US 20030231795 A1    WO 2004006587 A1

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