To kept it real simple for you are sort of leaning in the right direction.
Dvix compatiability will usually have limitations. So it will depend on what the Sony RDR HXD-790 will support. I have read through the manual and it lacks any details in regards to what it will actually support.
This is a quick rundown one of my Dvix players, it's actually a little old so it's limited on what it will support. Although I think you can get the point that there are newer codecs for example that it will not play.
File name size
The # of screen frames displayed per second
Structure of the video and audio
The level of GMC (Global Motion Compensation) supported
The Playable Dvix file
The Playable Subtile Format
The Playable Codec Format
The Playable Audio Format
- Dolbly Digital
- MP3 (Frequency rate 8 - 48khz) (Bit Rate 8 - 320)
- WMA (Frequency rate 22 - 48 Khz) ( Bit Rate 32 - 256)