●S/PDIF
The Sony/Philips Digital Interface is a fully digital audio connection. It can carry compressed 5.1 surround sound, but lacks the bandwidth for Dolby Atmos.
●Dolby Atmos
Home surround sound used to be expansive but on a flat plane. Dolby Atmos changes that by adding height channels (using either in-ceiling or up-firing speakers) for a 3D soundfield.