SMPTE ST 2048-1 PDF

This standard defines a family of progressive sample structures of 2048 × 1080 and 4096 × 2160 images for D-Cinema content creation as defined in Table 1 and Table 2 in Section 5. This standard specifies:

— R'G'B' color encoding and digital representation¹

— Y'C'_BC'_R color encoding and digital representation

— R'_FSG'_FSB'_FS color encoding and digital representation

This standard also defines tristimulus values and reference white of Free Scale-Gamut (FS-Gamut), Free Scale-Log (FS-Log) curve and a Color VANC packet. The FS-Log curve has an affinity with the sensitivity of human eye and can specify a much wider dynamic range than the nonlinear curve defined in Recommendation ITU-R BT.709. The Color VANC carries tristimulus values, reference white and parameter values of the FS-Log curve.

An auxiliary component A may optionally accompany R'G'B', Y'C'_BC'_R and R'_FSG'_FSB'_FS; these interfaces are denoted R'G'B'A, Y'C'_BC'_RA and R'_FSG'_FSB'_FSA. The "A" component if present, shall have the same characteristics as the G', Y' or G'_FS channel.

Sampling structures supported by this standard include, 4:4:4:4, 4:4:4, and 4:2:2.

Note: FS-Gamut and FS-Log are identifying names of the defined color space and the Log curve in this standard.

¹ Throughout this standard, references to signals represented by a single primed letter (e.g., R', G', B', Y', C'_B, C'_R and R'_FS, G'_FS, B'_FS) refer to signals to which the transfer characteristics in Section 6 have been applied. Such signals are commonly described as being gamma corrected.