ProHD is a name used by JVC

JVC

, usually referred to as JVC, is a Japanese international consumer and professional electronics corporation based in Yokohama, Japan which was founded in 1927...

 for its MPEG-2

MPEG-2

MPEG-2 is a standard for "the generic coding of moving pictures and associated audio information". It describes a combination of lossy video compression and lossy audio data compression methods which permit storage and transmission of movies using currently available storage media and transmission...

-based professional camcorders. 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".

Originally ProHD lineup consisted of shoulder mount HDV 720p camcorders and offered 24-frame/s progressive video recording and LPCM

LPCM

Linear pulse-code modulation is a method of encoding audio information digitally. The term also refers collectively to formats using this method of encoding...

 audio recording/playback. It is a common misconception that JVC developed ProHD as a proprietary extension to HDV. JVC has stressed out that 24-frame/s video and LPCM audio have always been part of the HDV format, but at the time they were initially offered no other HDV camcorder had them. The company went to great lengths to promote the format as an appropriate solution for professional high definition video production.

In 2009 JVC expanded the ProHD lineup with tapeless camcorders that record MPEG-2 video either in QuickTime

QuickTime

QuickTime is an extensible proprietary multimedia framework developed by Apple Inc., capable of handling various formats of digital video, picture, sound, panoramic images, and interactivity. The classic version of QuickTime is available for Windows XP and later, as well as Mac OS X Leopard and...

 or in XDCAM EX format..