Avid DS allegedly supports it:
- http://avid.custkb.com/avid/app/selfservice/search.jsp?DocId=273207
- Avid DS supports a wide variety of HD formats, which yield new bit rates when encoded to DNxHD. DNxHD 440 is the 1080p 59.97 version of DNxHD.
- Support for 1080p 50 & 1080p 59.94 (including new DNxHD formats: DNxHD 90, 290 & 440)