First the analog signal is digitized by an analog-to-digital converter to produce a raw, digital data stream. In the case of composite video, the luminance and chrominance are then separated; this is not necessary for S-Video sources.
First, an analog signal is converted to a digital format by an analog-to-digital converter, producing a raw, digital data stream. In the case of composite video, the luminance and chrominance signals are then distinguished from one another; in contrast, this separation is not necessary for S-Video sources.