ProHD is not a video recording format, but rather "an approach for delivering affordable HD products" and a common name for "bandwidth efficient professional HD models".
[1] Originally ProHD lineup consisted of shoulder mount HDV 720p camcorders and offered 24-frame/s progressive video recording and LPCM audio recording/playback.
It is a common misconception that JVC developed ProHD as a proprietary extension to HDV.
The company went to great lengths to promote the format as an appropriate solution for professional high definition video production.
[2] In 2009 JVC expanded the ProHD lineup with tapeless camcorders that record MPEG-2 video either in QuickTime or in XDCAM EX format.