High-Resolution High-Definition

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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. HRHD is an unofficial standard of encoding video, meaning that the video signal was ripped directly from a HDTV broadcast,^[1] then downsampled to approximately 960x540, and usually encoded with Xvid. While the horizontal resolution of 960 remains constant the vertical resolution can fluctuate up to 5% to provide clean cropping.

Encoding for a 40 to 55 minute HRHD TV show should be approximately 700MB, the size of a Compact Disc. It contains the original AC3 sound, which is often 5.1 channels,^[1] instead of the re-encoded stereo MP3 stream found in 350MB releases.

1 History
2 References
3 See also
4 External links

[edit] History

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 group defined what HRHDTV is in their .nfo, a small text file included with releases to give information specific to the release.^[1]

Recently, there has been a misconception about the name. Some mistakenly think the term means Half-Resolution High-Definition. This version of the term is incorrect not only because of the history, but also factually. While half-resolution is appropriate if the source is 1080p, it fails if the source is 720p or 1080i, as half of the former is 640x360, and HRHD is not interlaced.