Patent ID: 11070830

Abstract:
A decoding method including decoding one standard dynamic range (SDR) luminance component and two SDR chrominance components from a bitstream produced by an encoder and color converting the SDR luminance component and the two decoded SDR chrominance components. A dynamic expansion function is applied on the color converted SDR luminance component to obtain a high dynamic range (HDR) luminance component, wherein the dynamic expansion function is the inverse of a dynamic reduction function applied on the HDR luminance component on the encoder's side. A color transfer operation is applied on the color converted SDR chroma components to obtain an HDR chrominance component and an HDR chrominance component in XYZ color space. A color conversion matrix is applied on the HDR luminance component, the HDR chrominance component and the HDR chrominance component to obtain an HDR picture in RGB color space.