A signal format in which either the tristimulus value red (R), green (G), and blue (B) signals representing the picture contents or a matrixed version consisting of the luminance (Y) and two color-difference signals (R Y, L3 Y) - are individually digitized and combined into a single data stream. SMPTE 125M describes a digital component television signal interface for 525-line/59.94 field/sec television systems.

Specifications for digital magnetic video tape recording of component digital video of 525-line or 625-line structure sampled at 13.5 MHz are grouped into the D1 VTR standards. For 525-line, samples at 13.5 MHz, the specifications are SMPTE 224M, 225M, 226M, 227M, RP 155, and EG 10. An index to the specifications for D1, both 525-line and 625-line versions, is SMPTE EG 22.