HRHD (high-resolution high-definition) (also HR, HRHDTV, or HR.HDTV) is an initialism referring to an image resolution derived from high-definition video, often seen as part of the filename of TV shows shared on the Internet.
Encoding for a 40–55-minute HRHD TV show should be approximately 700 MB, the size of a compact disc.
It contains the original AC3 sound, which is often 5.1 channels, instead of the re-encoded stereo MP3 stream found in 350MB releases.
The HRHD format began in late 2003 when the TV capture group FUA began distributing what they termed "HRHDTV rips" on the private FTP sites of The Scene.
The HRHD dimensions are precisely half of 1080p video, but this yields only 25% of the original 1080p picture information.