Media Stream Definition (MSD) is a streaming protocol which enables you to stream content from multiple sources at once, without having to connect a separate computer or device.
It is a common solution for mobile and desktop video streaming.MSD is the technology behind streaming video on smartphones and tablets.
The key difference between MSD and video streaming is that MSD uses a proprietary codec, called MPEG-4, which is proprietary.
MPEG-DAC (Digital Audio Copy) is an MPEG-2 codec, and MPEG-3 is a MPEG-1 codec.MSd uses the same codec as video streaming, but uses a slightly different format.
In a nutshell, MPEG-HD, MPEG (High Definition Audio), MPEG-S, and other standard formats can be used to play MPEG-ED, MPEG, MPEG2, MPEG3, and so on.
But MSD is designed to stream directly to a TV set, with no need for external hardware, and no need to connect anything to the TV.