Title:
画素の前処理および符号化
Document Type and Number:
Japanese Patent JP6516851
Kind Code:
B2
Abstract:
A pixel pre-processing comprises obtaining an original linear luminance component value of a pixel in a picture in a third color space determined based on a linear color of the pixel in a first color space. A non-linear luma component value in a second color space is derived for the pixel based on a first non-linear chroma component value in the second color space, a second non-linear chroma component value in the second color space and the original linear luminance component value in the third color space. The pre-processing reduces luminance artifacts that otherwise may occur when chroma subsampling is used in combination with a non-linear transfer function.
Inventors:
Strem, jacob
Sam Elson, Jonathan
Sam Elson, Jonathan
Application Number:
JP2017542096A
Publication Date:
May 22, 2019
Filing Date:
January 28, 2016
Export Citation:
Assignee:
Telefon Acty Bora Get Erm Ericson (Pubble)
International Classes:
H04N19/85
Foreign References:
| WO2016120209A1 | ||||
| WO2016120330A1 | ||||
| WO2010004726A1 | ||||
| WO2007132635A1 | ||||
| US20130156311 |
Attorney, Agent or Firm:
Sonoda Yoshitaka
Yoshitaka Togashi
Ishioka Toshiyasu
Ryo Fujii
Yoshitaka Togashi
Ishioka Toshiyasu
Ryo Fujii