HRHD (high-resolution high-definition) (also HR, HRHDTV, or HR.HDTV) is an
initialism
An acronym is a word or name formed from the initial components of a longer name or phrase. Acronyms are usually formed from the initial letters of words, as in ''NATO'' (''North Atlantic Treaty Organization''), but sometimes use syllables, as ...
referring to an
image resolution
Image resolution is the detail an image holds. The term applies to digital images, film images, and other types of images. "Higher resolution" means more image detail.
Image resolution can be measured in various ways. Resolution quantifies how ...
derived from
high-definition video
High-definition video (HD video) is video of higher resolution and quality than standard-definition. While there is no standardized meaning for ''high-definition'', generally any video image with considerably more than 480 vertical scan lines (No ...
, often seen as part of the
filename
A filename or file name is a name used to uniquely identify a computer file in a directory structure. Different file systems impose different restrictions on filename lengths.
A filename may (depending on the file system) include:
* name &ndas ...
of TV shows shared on the Internet. HRHD is an unofficial standard of
encoding video, meaning that the video signal was
ripped
Ripped may refer to:
* Ripped, a slang term for having achieved muscle hypertrophy
* '' Ripped: How the Wired Generation Revolutionized Music'', a book by Greg Kot
* ''Ripped,'' a series of books and DVDs by Clarence Bass
* "Ripped", an episode of ...
directly from a
HDTV
High-definition television (HD or HDTV) describes a television system which provides a substantially higher image resolution than the previous generation of technologies. The term has been used since 1936; in more recent times, it refers to the g ...
broadcast, then
downsampled to approximately 960 × 540, and usually encoded with
Xvid
Xvid (formerly "XviD") is a video codec library following the MPEG-4 video coding standard, specifically MPEG-4 Part 2 Advanced Simple Profile (ASP). It uses ASP features such as b-frames, global and quarter pixel motion compensation, lumi mas ...
. While the horizontal resolution of 960 remains constant the vertical resolution can fluctuate up to 5% to provide clean cropping. It is sometimes erroneously referred to as ''Half''-Resolution High-Definition.
Encoding for a 40–55-minute HRHD TV show should be approximately 700 MB, the size of a
compact disc
The compact disc (CD) is a Digital media, digital optical disc data storage format that was co-developed by Philips and Sony to store and play digital audio recordings. In August 1982, the first compact disc was manufactured. It was then rele ...
. It contains the original
AC3 sound, which is often
5.1 channels, instead of the re-encoded
stereo
Stereophonic sound, or more commonly stereo, is a method of sound reproduction that recreates a multi-directional, 3-dimensional audible perspective. This is usually achieved by using two independent audio channels through a configuration ...
MP3
MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) is a coding format for digital audio developed largely by the Fraunhofer Society in Germany, with support from other digital scientists in the United States and elsewhere. Origin ...
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
The File Transfer Protocol (FTP) is a standard communication protocol used for the transfer of computer files from a server to a client on a computer network. FTP is built on a client–server model architecture using separate control and data ...
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.
There has often been a misconception about the name. Some mistakenly think the term means ''half-resolution high-definition''. HRHD resolution is actually ¾ height and width of
720p
720p (1280×720 px; also called HD ready, standard HD or just HD) is a progressive HDTV signal format with 720 horizontal lines/1280 columns and an aspect ratio (AR) of 16:9, normally known as widescreen HDTV (1.78:1). All major HDTV broadcast ...
video. By area, the picture is 56.25% of the typical 720p HD broadcast. The HRHD dimensions are precisely half of
1080p
1080p (1920×1080 progressively displayed pixels; also known as Full HD or FHD, and BT.709) is a set of HDTV high-definition video modes characterized by 1,920 pixels displayed across the screen horizontally and 1,080 pixels down the screen vert ...
video, but this yields only 25% of the original 1080p picture information.
See also
*
Pirated movie release types
Pirated movie release types are the different types of pirated movies and television series that end up on the Internet. They vary wildly in rarity and quality due to the different sources and methods used for acquiring the video content, in addi ...
*
Standard (warez)
Standards in the warez scene are defined by groups of people who have been involved in its activities for several years and have established connections to large groups.
These people form a committee, which creates drafts for approval of the larg ...
References
High-definition television
Standards
Warez
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