DNx HD Codec
Avid DNxHD, which stands for "Digital Nonlinear Extensible High Definition", is a lossy high-definition video post-production codec engineered for multi-generation compositing with reduced storage and bandwidth requirements. It is an implementation of SMPTE VC-3 standard. DNxHD codec was developed by Avid Technology, Inc.
Read more about DNx HD Codec: Overview, Technical Details, VC-3