Title:
ENCODING METHOD, DECODING METHOD, ENCODING DEVICE, DECODING DEVICE, ENCODING PROGRAM, AND DECODING PROGRAM
Document Type and Number:
WIPO Patent Application WO/2019/135294
Kind Code:
A1
Abstract:
The present invention reduces SAO parameter bit amount and improves image quality. This encoding method is characterized by having: a calculation step for dividing the gradation of pixel values in an encoding unit block into a plurality of classes which have a prescribed gradation number, and calculating the number of pixels which belong to each of the plurality of classes; a class addition step for selecting n number (n is an integer of one or greater) of high-ranking classes for which the calculated pixel number is high, and adding an offset value to the pixel value of the pixels belonging to each of the selected n number of classes; and a first signaling step for signaling an SAO parameter which contains the added offset value.
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Inventors:
SASAKI EIICHI (JP)
Application Number:
PCT/JP2018/025141
Publication Date:
July 11, 2019
Filing Date:
July 03, 2018
Export Citation:
Assignee:
SOCIONEXT INC (JP)
International Classes:
H04N19/85; H04N19/463; H04N19/80
Foreign References:
| JP2017005504A | 2017-01-05 | |||
| JP2014533048A | 2014-12-08 | |||
| US20150195534A1 | 2015-07-09 |
Other References:
COHEN, R. ET AL.: "Description of screen content coding technology proposal by Mitsubishi Electric Corporation", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG 16 WP3, no. JCTVC-Q0036_r2, 28 March 2014 (2014-03-28), Valencia, ES, pages 6 - 8, XP030115926
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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