A QP offset value is calculated for a chroma component of a pixel in a picture of a video sequence based on a reference QP value and a factor that depends on a difference between a capture color space for the pixel and an encoded color space for the pixel. A QP value is then calculated for the chroma component based on the reference QP value reduced by the QP offset value. The calculation of QP values for chroma components based on the factor that depends on the difference between capture and encoded color spaces improves the chroma quality in an efficient way in particular for HDR and WCG video.
申请公布号
WO2017052440(A1)
申请公布日期
2017.03.30
申请号
WO2016SE50699
申请日期
2016.07.07
申请人
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人
ANDERSSON, Kenneth;SAMUELSSON, Jonatan;HERMANSSON, Per;STRÖM, Jacob;PETTERSSON, Martin