IMAGE SIGNAL CONVERSION METHOD AND APPARATUS FOR REDUCING IMAGE QUALITY DETERIORATION

WIPO Patent Application WO/2017/126904

A1

Disclosed is an image signal conversion method and apparatus for converting an input image into an image format suitable for compression or converting a reconstructed image into an image format suitable for display. An image signal conversion apparatus, according to an aspect of the present invention, comprises: a color space conversion unit for converting a color space of an image signal to divide the image signal into a brightness component and a color component; a transfer function application unit for selectively applying a transfer function to either the brightness component or the color component; a quantization unit for quantizing the image signal including the brightness component and the color component to which the transfer function has been selectively applied; and a sampling unit for sampling the quantized image signal.

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KANG JUNG WON (KR)
KO HYUN SUK (KR)
LEE JIN HO (KR)
JUN DONG SAN (KR)
KIM HUI YONG (KR)
KWAK YOUNG SHIN (KR)
BAEK YE SEUL (KR)
CHOI JIN SOO (KR)

PCT/KR2017/000660

July 27, 2017

January 19, 2017

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ELECTRONICS & TELECOMMUNICATIONS RES INST (KR)
UNIST(ULSAN NAT INST OF SCIENCE AND TECHNOLOGY) (KR)

H04N19/186; H04N19/124; H04N19/132

US20150248747A1	2015-09-03
KR20150091149A	2015-08-07
KR20160001897A	2016-01-07
KR20150067089A	2015-06-17
KR20140066771A	2014-06-02

SUNG, Byung Kee et al. (KR)

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