Grass Valley EDIUS Pro v.7.4 Reference Manual - Manual (Page 25)

Chapter 1 Summary — Grass Valley HQ Codec/Grass Valley HQX Codec
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Grass Valley HQ Codec/Grass Valley HQX
Codec
With EDIUS, you can edit 4K and high-definition video in individual frame units. Optimal codec for editing high-resolution video is Grass
Valley HQ Codec/Grass Valley HQX Codec. By using the Grass Valley HQ Codec/Grass Valley HQX Codec, the editing response time can
be dramatically improved. When you use the Grass Valley HQ Codec, approximate file size will be 7 times larger than the HDV (it may vary
depending on the video or settings), therefore, it is recommended to use a hard disk drive that is as fast and large as possible.
Grass Valley HQX Codec supports 4K and 10-bit video quantization bitrate.