er characteristic V 0.0 for Sqrt( / 1000 > Lc >= 0 (100 * Sqrt( 10) : 1 range) V = 1.099 * L 0.45 0.099 for Lc >= 0.018 IEC 61966-2-4 V = 4.500 * Lc for 0.018 > Lc > -0.018 V =-1.099 * (-Lc)0.45+0.099 for -0.018 >= Lc V = 1.099 * Lc0.45 - 0.099 for 1.33 > Lc >= 0.018 ITU-R Rec. BT. 1361 extended colour V = 4.500 * Lc for 0.018 > L >= -0.0045 gamut system V = -(1.099*(-4* Lc)0.45-0.099) for -0.0045 > Lc >= -0.25 13..255 Reserved For future use by ITU-T ISO/IEC matrix_coefficients describes the matrix coefficients used in deriving luma and chroma signals from the green, blue, and red primaries, as specified in Table E-5. matrix_coefficients shall not be equal to 0 unless both of the following conditions are true: BitDepthc is equal to BitDepthy, chroma_format_idc is equal to 3 (4:4:4). The specification of the use of matrix coefficients equal to 0 under all other conditions is reserved for future use by ITU-T ISO/IEC. Rec. ITU-T H.264 (01/2012) matrix_coefficients shall not be equal to 8 unless one of the following conditions is true: BitDepthc is equal to BitDepthy, BitDepth is equal to BitDepthy + 1 and chroma_format_idc is equal to 3 (4:4:4). The specification of the use of matrix_coefficients equal to 8 under all other conditions is reserved for future use by ITU-T | ISO/IEC. When the matrix_coefficients syntax element is not present, the value of matrix_coefficients shall be inferred to be equal to 2 (unspecified). For the interpretation of matrix_coefficients, the following is specified: 1. The range of E'R, E'G, and E'B is specified as follows: If transfer characteristics is not equal to 11 or 12, E'R, E'G, and E'B are real numbers with values in the range of 0 to 1. Otherwise (transfer_characteristics is equal to 11 (IEC 61966-2-4) or 12 (ITU-R BT.1361 extended colour gamut system)), E'R, E'G and E'B are real numbers with a larger range not specified in this Recommendation. Nominal white is specified as having E'R equal to 1, E'G equal to 1, and E'B equal to 1. Nominal black is specified as having E'R equal