Title:
IMAGE ENCODING METHOD AND APPARATUS, AND IMAGE DECODING METHOD AND APPARATUS
Document Type and Number:
WIPO Patent Application WO/2017/142319
Kind Code:
A1
Abstract:
The present invention relates to an apparatus and a method for image encoding/decoding using data hiding. Disclosed is an apparatus and a method for image encoding/decoding which, if a difference between the scan position of a final effective transformation coefficient in a sub-block of a current transformation unit and the scan position of an initial effective transformation coefficient exceeds a threshold value, determine an intra-prediction direction of a current encoding unit by using parity of a sum of transformation coefficients corresponding to a certain scan position in the sub-block, or correct the level of the effective transformation coefficient of any one of the transformation coefficients so that the parity of the sum of the transformation coefficients indicates the intra-prediction direction of the current encoding unit. By using a method of hiding data in the parity of an effective transformation coefficient, a bit rate is reduced, and the encoding and decoding efficiency is improved.
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Inventors:
CHOI NA-RAE (KR)
PARK MIN-WOO (KR)
PARK MIN-WOO (KR)
Application Number:
PCT/KR2017/001697
Publication Date:
August 24, 2017
Filing Date:
February 16, 2017
Export Citation:
Assignee:
SAMSUNG ELECTRONICS CO LTD (KR)
International Classes:
H04N19/122; H04N19/129; H04N19/184; H04N19/593; H04N19/70
Foreign References:
| KR20150047332A | 2015-05-04 | |||
| KR20150048437A | 2015-05-07 | |||
| KR20150055104A | 2015-05-20 | |||
| JP3593988B2 | 2004-11-24 | |||
| KR20080053336A | 2008-06-12 |
Attorney, Agent or Firm:
Y.P.LEE, MOCK & PARTNERS (KR)
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