SDI Technologies iH30 Dokumentacja Pobierz pdf (Strona 66)

Advanced Topics

Quadro SDI Output PG-03776-001_v06 | 61

colorMat[0][2] = 0.0725f;

colorMat[1][0] = 0.5000f;

colorMat[1][1] = -0.4542f;

colorMat[1][2] = -0.0455f;

colorMat[2][0] = -0.1146f;

colorMat[2][1] = -0.3350f;

colorMat[2][2] = 0.5000f;

break;

} // switch

colorOffset[0] = 0.0625;

colorOffset[1] = 0.5;

colorOffset[2] = 0.5;

colorScale[0] = 0.0625;

colorScale[1] = 0.875;

colorScale[2] = 0.875;

XNVCTRLSetGvoColorConversion(dpy, screen, colorMat,

colorOffset, colorScale);

XNVCTRLSetAttribute(dpy, screen, 0,

NV_CTRL_GVO_OVERRIDE_HW_CSC,

NV_CTRL_GVO_OVERRIDE_HW_CSC_TRUE);

} else {

XNVCTRLSetAttribute(dpy, screen, 0,

NV_CTRL_GVO_OVERRIDE_HW_CSC,

NV_CTRL_GVO_OVERRIDE_HW_CSC_FALSE);

}

10.3.4 Typical Color Space Conversions

This section describes the matrix coefficients and scale and offset values for common

video and full range color space conversions.

RGB [0,219] from ITU-R BT.601 Y’[0,219]CrCb[0,224]

RGB [0,255] from ITU-R BT.601 Y’[0,219]CrCb[0.224]

Offset (8-bit) Offset (10-bit)

Y = 16/235 = 0.068 Y = 64/940 = 0.068

Cb = (240+16)/2 / (255) = 0.5 Cb = (960+64)/2 / (1023) = 0.5

Cr = (240+16)/2 / (255) = 0.5 Cr = (960+64)/2 / (1023) = 0.5

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SDI Technologies iH30 Dokumentacja Strona 66