An HDMI Glossary
GLOSSARY OF HDMI TERMS:-
1080i An HD presentation format consisting of 1,080 vertical lines of
1080p An HD presentation format consisting of 1,080 vertical lines of
1440p An HD presentation format consisting of 1,440 vertical lines of
480i A non-HD presentation format consisting of 480 vertical lines of
480p A non-HD presentation format consisting of 480 vertical lines of display resolution in a progressive scan. Progressive-scan DVD players typically output a 480p signal.
720p An HD presentation format consisting of 720 vertical lines of display
AC-3 The digital audio format used for DTV broadcasts in the United States.
Analog Analog systems represent data as a series of variations in some
Aspect Ratio The ratio of screen width to screen height. For television
ATC Authorized Testing Center. In order to verify compliance with the HDMI technical specification, components are tested in ATCs operated by HDMI Licensing, LLC. Products are tested according to a Compliance Test Specification (CTS). ATCs are located in Europe, Asia, and North America.
ATSC Advanced Television System Committee technical standard. The digital
Bandwidth The carrying capacity of a data interconnect. High-bandwidth
Bit depth See Colour Depth.
Blu-ray Disc One of two potential successor technologies to the DVD, using
Cable Equalization A technology used in many HDMI receiver chips to boost the incoming signal, allowing the sink device (TV, projector, monitor, etc.) to compensate for weaker signals. Components employing cable equalization technology can be connected with longer cable runs than might otherwise be practical.
CAT-5/CAT-6 Cable Category 5 and Category 6 cabling is used in Ethernet and Fast Ethernet networks, and has also been adapted to transmit an HDMI signal. Both cables feature four twisted-pair copper wires and an RJ-45 connector, with the main difference being that CAT-6 has tighter tolerances for line noise and crosstalk. CAT-5/CAT-6 has been successfully used to transmit HDMI over extremely long cable runs, i.e. 40-50 meters.
Category 1 HDMI Cable See Standard HDMI Cable
Category 2 HDMI Cable See High Speed HDMI Cable
CEC See Consumer Electronics Control.
Codec A program used for encoding and decoding a digital signal, usually
Colour Banding A symptom of insufficient colour depth, colour banding occurs when a monitor is unable to render smooth colour gradients, and instead presents stripes or bands of colour, especially in very light or very dark areas of an image. This occurs because the human eye is extraordinarily sensitive to colour gradations, and can detect the change from one shade to another when colour depth is limited.
Colour Depth - A measurement of the number of bits used to represent the colour of a single pixel. Greater colour depth gives a larger number of distinct colours, i.e. millions or billions of colours, allowing for smoother colour gradients. (See also: Deep Colour)
Colour Striping See Colour Banding.
Compliance Testing Specification (CTS) Manufacturers who license HDMI
Component Video A legacy video connection for home theater equipment, using three separate cables to send a picture in three discrete colour channels, e.g. red, green, and blue.
Compression Technologies designed to increase the carrying capacity of a data connection by compacting the data stream at one end and re-expanding it at the other end. With the exception of lossless audio codecs, compression and decompression algorithms for audio and video are inherently "lossy," meaning that data are lost in the process. One of the advantages of HDMI over other connection technologies is its enormous carrying capacity, which makes compression unnecessary.
Consumer Electronics Control (CEC) One of the channels in an HDMI connection is dedicated to a set of advanced control functions, collectively known as CEC. When enabled by the manufacturer, CEC functionality allows connected devices to control each other in useful ways. For instance, a single command on a remote control can be used to play a DVD, or to launch other complex activities across multiple devices in a home theater system.
CTS See Compliance Testing Specification.
Deep Colour The expanded bandwidth of HDMI 1.3 is allowing manufacturers to design displays with much greater Colour Depth. These new "Deep Colour" monitors will be capable of rendering many more distinct hues than current displays - up to trillions of colours rather than thousands or millions. (See also: Colour Depth; Colour Banding)
Digital Digital systems represent data in binary form, encoding it as a series of zeroes and ones. (See also: Analog)
Dolby Digital A family of multi-channel audio codecs from Dolby Laboratories, based on AC-3 technology, that includes Dolby Digital, Dolby Digital EX, Dolby Digital Live, Dolby Digital Surround EX, and Dolby Digital Plus.
Dolby TrueHD An advanced audio codec developed by Dolby Laboratories. Dolby TrueHD is a lossless audio format, meaning that no audio information is lost when the signal is compressed and uncompressed.
DSD Direct-Stream Digital, the trademark name used by Sony and Philips for
DTS A family of multi-channel audio codecs from Digital Theater Systems, Inc., including DTS, DTS-ES, DTS Neo:6, and DTS 96/24. DTS audio codecs are used in both commercial and home theater applications.
DTS-HD Master Audio An advanced audio codec developed by Digital Theater
DTV Digital televisions, the successor technology to analog TV, are televisions capable of receiveing a ditigal terrestrial or cable broadcast signal, like ATSC (North America) or DVB (Europe).
DVI (DVI-D) Digital Visual Interface, a predecessor technology to HDMI. There are different versions of DVI for PC and CE applications - DVI-D is the version used in CE devices. DVI is based on the same technology as HDMI, so the two connections are completely compatible - however a separate set of connections is required to transmit the audio signal, since DVI transmits video only.
EDID (EDID-ROM) A memory chip (ROM), included in most HD devices, containing essential information about that device. When connected via HDMI, EDID data is shared so that other components can read its make, model, and capabilities through the DSD channel. EDID stands for Extended Display Identification Data, and is defined by VESA, a video standards organization.
EDTV A widescreen television capable of displaying a 480p signal.
Extended Colour Gamut See x.v.Colour
Frame Rate See Refresh Rate.
HD High definition. Usually used to describe any device capable of
HDCP High-bandwidth Digital Content Protection. Developed by Intel, HDCP is an authentication system designed to protect copyrighted audiovisual content. Most HDMI-enabled and DVI-enabled devices also employ HDCP).
HD-DVD High-definition DVD, one of two potential successor technologies to the DVD. A high-density optical disc format designed for the storage of high-definition video. HDMI is the interconnect standard for HD-DVD players (see also: Blu-ray Disc)
HDMI High Definition Multimedia Interface. A 19-pin digital connection that
HDMI 1.3 The HDMI technical specification is updated from time to time, and HDMI 1.3 is the most recent release. While all versions of the spec are backward-compatible, devices built to the 1.3 standard may feature extended capabilities not found in earlier devices. For instance, a newer AV receiver might take advantage of HDMI 1.3's native support for the new lossless audio codecs, but it would still be fully compatible with older devices built under earlier versions of HDMI.
HDMI Repeater A device that both receives and sends HDMI signals, such as
HDMI Sink A device that receives an HDMI signal, such as an HDTV.
HDMI Source A device that sends an HDMI signal, such as a DVD player or Set-top box.
HDTV High Definition Television. A widescreen television capable of
High Speed HDMI Cable High Speed HDMI cables are tested to a more rigorous performance standard, aimed at meeting the needs of high-end home theater systems. It is performance tested to 340 MHz, and can reliably transmit a 1080p signal (and more) up to 7.5 meters. High Speed HDMI Cables are referred to as Category 2 cables in the HDMI specification. (See also: Standard HDMI Cable).
Interlaced Scan In an interlaced scan, only half the screen is refreshed at a time. The video signal beam skips every other line, and fills in the missing lines on the next pass. (See also: Progressive Scan)
Lip Sync One of the new features enabled in HDMI 1.3, Lip Sync functionality enables the automatic synchronization of video and audio signals, correcting for processor lags that can force audio and video timing out of proper alignment.
Lossless Audio The latest multi-channel audio codecs are based on lossless
Mini HDMI (Mini HDMI-C) Connector A miniature HDMI connector, introduced in HDMI 1.3, designed for use in mobile and handheld products where space is at a premium. The Mini HDMI Connector is pin-for-pin compatible with the larger Standard HDMI Connector and completely compatible as well. The Mini HDMI Connector is referred to as the Type C Connector in the HDMI specification. See also Standard HDMI Connector.
MPEG A family of audio/video codecs developed by the Motion Picture Experts
NTSC The legacy analog television broadcast system used in the US, being
One-bit Audio See DSD.
PCM Audio A digital audio signal created by sampling an analog signal and
Pixel depth See Colour Depth.
Progressive Scan In a progressive scan, the entire screen is refreshed on every pass. The video signal beam does not skip alternate lines, but fills in each line every time, which tends to render smoother motion sequences. (See also: Interlaced Scan)
Refresh Rate The frequency with which a video image is refreshed, expressed as either frames per second (i.e. 60 fps) or as an equivalent frequency (i.e. 60 Hz). Faster refresh rates tend to render smoother motion sequences. Refresh rates for broadcast TV vary by region - for example, European HD systems run at 50 Hz.
Repeater See HDMI Repeater
RGB colour A colour model in which red, green, and blue values are used to
SACD Super Audio CD. An optical disc format for high-fidelity audio, using one-bit (DSD) audio encoding, developed by Sony and Philips Electronics as a replacement for the audio CD. Compared to the conventional CD, SACD boosts frequency response from 20kHz to 100kHz, and dynamic range from 96 to 120 db. Classical and jazz titles tend to dominate the SACD catalog.
SCART An analog connection standard, also known as Euroconnector or Peritel. SCART is a 21-pin connector used in Europe to interconnect satellite receivers, television sets, and other audiovisual equipment. SCART transmits both video and audio data in a single cable. The name comes from "Syndicat des Constructeurs d'Appareils Radiorécepteurs et Téléviseurs."
Set-top Box (STB) A device for decoding incoming AV signals, such as programs from a cable or satellite TV network. Many models also include DVR (digital video recorder) technology. Virtually all STBs now rely on HDMI output.
Sink See HDMI Sink.
Source See HDMI Source.
Standard HDMI Cable A Standard HDMI cable is one that is tested to
Standard HDMI Connector The 19-pin plug that is currently used in most HDMI-enabled products. The Standard HDMI Connector is referred to as the Type A HDMI Connector in the HDMI specification. See also Mini HDMI Connector.
STB See Set-top box.
TMDS Transition Modulated Differential Signaling, a technology for transmitting serial data at very high speeds. TMDS is a core technology used in both DVI and HDMI.
Type A HDMI Connector See Standard HDMI Connector.
Type C HDMI Connector See Mini HDMI Connector.
VESA The Video Electronics Standards Association. The industry group
x.v.Colour A new standard for an expanded, "wider" colour space or gamut, enabled by HDMI 1.3 and being developed by Sony and Mitsubishi, among others. The xv colour space (also known as xvYCC colour) incorporates a much larger portion of the visible colour spectrum than the older RGB colour model.
xvYCC Colour The original acronym the colour model now known as x.v.Colour.
YCbCr (Component) Colour A family of colour spaces, used in some HD applications, where colour is expressed using a luma component plus red and blue chroma components, rather than by describing absolute colour values, as in the RGB colour model. Also known as YPbPr colour.
Reproduced from http://www.hdmi.org
below is some links to further information on HDMI, also taken from this website.
Click here to download a Brochure in pdf format, an HDMI overview
Click here to download a Brochure in pdf format, an HDMI 1.3 overview
Click here to download a Video in .mov format , an HDMI overview (please note download is 10Mb in size)