Title:
PREDICTIVE IMAGE GENERATION DEVICE, IMAGE DECODING DEVICE, AND IMAGE ENCODING DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/068856
Kind Code:
A1
Abstract:
The prevent invention generates a predictive image using a method with which it is easy to execute parallel processing over a plurality of pixels when referring to an unfiltered reference pixel value and deriving each pixel of the predictive image in accordance with the distance from a reference area. A predictive pixel value constituting a predictive image is derived by applying weighted addition using a weighting coefficient to a filtered predictive pixel value and at least one or more unfiltered reference pixel values of subject pixels in a predictive block, a weighting coefficient for the unfiltered reference pixel value being derived as the product of a coefficient of reference intensity determined in accordance with the direction of prediction indicated by a prediction mode and a distance weight that monotonously decreases as a result of increase in the reference distance to the subject pixel.
Inventors:
IKAI TOMOHIRO
TSUKUBA TAKESHI
YAMAMOTO TOMOYUKI
TSUKUBA TAKESHI
YAMAMOTO TOMOYUKI
Application Number:
PCT/JP2016/074695
Publication Date:
April 27, 2017
Filing Date:
August 24, 2016
Export Citation:
Assignee:
SHARP KK (JP)
International Classes:
H04N19/593; H04N19/105; H04N19/167; H04N19/182
Domestic Patent References:
| WO2014050971A1 | 2014-04-03 |
Foreign References:
| JP2013502807A | 2013-01-24 |
Other References:
SAID, AMIR ET AL.: "Position dependent prediction combination for intra-frame video coding", 2016 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP, 25 September 2016 (2016-09-25), pages 534 - 538, XP033016540
YU , SHENGSHENG ET AL.: "Distance-based weighted prediction for H.264 intra coding", INTERNATIONAL CONFERENCE ON AUDIO, LANGUAGE AND IMAGE PROCESSING, 2008. ICALIP 2008, 7 July 2008 (2008-07-07), pages 1477 - 1480, XP031298416
YU , SHENGSHENG ET AL.: "Distance-based weighted prediction for H.264 intra coding", INTERNATIONAL CONFERENCE ON AUDIO, LANGUAGE AND IMAGE PROCESSING, 2008. ICALIP 2008, 7 July 2008 (2008-07-07), pages 1477 - 1480, XP031298416
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
Download PDF: