High-Resolution High-Definition

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, [http://www.nfohump.com/index.php?switchto=nfos&menu=quicknav&item=viewnfo&id=49132 NFO from one of the very first HRHD rips] ] 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. It is sometimes erroneously, but more appropriately, referred to as "Half"-Resolution High-Definition — being half the resolution of 1080p.

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, instead of the re-encoded stereo MP3 stream found in 350MB releases.

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.

Recently, there has been a misconception about the name. Some mistakenly think the term means "Half-Resolution High-Definition". HRHD resolution is actually ¾ of the dimensions of 720p video. When squared, it makes the picture 9/16, or 56.25% of the typical HD broadcast source material in 720p. The HRHD dimensions are precisely half of 1080p video, but this yields only one quarter of the original 1080p picture information.

References

ee also

* Pirated movie release types
* Standard (warez)

External links