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 into a digital format by an analog-to-digital converter to generate a raw, digital data stream. In the case of composite video, luminance and chrominance are then distinguished; however, this step is not required for S-Video sources.