-extern const uint8_t dither_4x4_16[4][8];
-extern const uint8_t dither_8x8_32[8][8];
-extern const uint8_t dither_8x8_73[8][8];
-extern const uint8_t dither_8x8_220[8][8];
-
+/* Color space conversion coefficients for YCbCr -> RGB mapping.
+ *
+ * Entries are {crv, cbu, cgu, cgv}
+ *
+ * crv = (255 / 224) * 65536 * (1 - cr) / 0.5
+ * cbu = (255 / 224) * 65536 * (1 - cb) / 0.5
+ * cgu = (255 / 224) * 65536 * (cb / cg) * (1 - cb) / 0.5
+ * cgv = (255 / 224) * 65536 * (cr / cg) * (1 - cr) / 0.5
+ *
+ * where Y = cr * R + cg * G + cb * B and cr + cg + cb = 1.
+ */