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VESA (; Video Electronics Standards Association ) is an international standards body for computer graphics formed in 1988 by NEC Home Electronics, maker of the MultiSync monitor line, and eight video display adapter manufacturers: ATI Technologies, Genoa Systems, Orchid Technology, Renaissance GRX, STB Systems, Tecmar, Video 7 and Western Digital / Paradise Systems.
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VESA and Video
VESA ( Video Electronics Standards Association ) Local Bus worked alongside the ISA bus ; it acted as a high-speed conduit for memory-mapped I / O and DMA, while the ISA bus handled interrupts and port-mapped I / O.
M1-DA connectors are sometimes labeled as DVI-M1 ; they are used for the VESA Enhanced Video Connector and VESA Plug and Display schemes.
Coordinated Video Timings-Reduced Blanking ( CVT-RB ) is a VESA standard which offers reduced horizontal and vertical blanking for non-CRT based displays.
* VESA Video Interface Port ( VIP ), a digital video interface standard
* VESA Enhanced Video Connector, an obsolete standard for reducing the number of cables around computers.
EDID is defined by a standard published by the Video Electronics Standards Association ( VESA ).
The standard was created by the Video Electronics Standards Association ( VESA ).
The closest to an " official " definition was in the VBE extensions defined by the Video Electronics Standards Association ( VESA ), an open consortium set up to promote interoperability and define standards.
* Video Electronics Standards Association ( VESA )
* Coordinated Video Timings, specified by VESA
The Modeline is based on the Generalized Timing Formula or the Coordinated Video Timings standards produced by VESA.
Enhanced Graphics Adapter ( EGA ) and better adapters natively support text modes beyond 80 × 25 character cells: 80 × 43 ( EGA ), 80 × 50 ( Video Graphics Array, VGA ), 132 × 50 and 132 × 60 ( VESA compatible Super VGA ), etc., increasing the simulated graphic resolution available, doubled again through the half block characters.
Digital Packet Video Link is a video standard released by VESA in 2004.
* Recommended-Pentium 90 MHz or better, 16 Mb RAM, VESA Local Bus ( VLC ) or PCI video card with fast DOS access & 1Mb of video memory, VESA 2. 0 Compliant Video card ( or software driver ), 4X speed CD-ROM and speed compensating joystick
William Lempesis, Executive Director, Video Electronics Standards Association ( VESA )
DisplayPort is a digital display interface developed by the Video Electronics Standards Association ( VESA ).
VESA and Standards
According to Kendall Bennett, developer of the VBE / AF standard, the VESA Software Standards Committee was closed down due to a lack of interest resulting from charging high prices for specifications.
Function numbers are assigned by VESA Software Standards Committee ( SSC ).
PCI video cards and other cards that contain a BIOS are problematic, although video cards conforming to VESA Standards may be used for secondary monitors.
* VESA Standards FAQ
VESA and is
Generalized Timing Formula ( GTF ) is a VESA standard which can easily be calculated with the Linux gtf utility.
Similar to the analog VESA display power management signaling ( DPMS ) standard, a connected device can turn a monitor off when the connected device is powered down, or programmatically if the display controller (" graphics card ") of the device supports it.
The analog section of the DVI specification document is brief and points to other specifications like VESA VSIS for electrical characteristics and GTFS for timing information.
DisplayPort is a VESA technology that provides digital display connectivity.
VESA BIOS Extensions ( VBE ) is a VESA standard, currently at version 3, that defines the interface that can be used by software to access compliant video boards at high resolutions and bit depths.
VESA Local Bus is an example of a local bus design.
VESA Display Power Management Signaling ( or DPMS ) is a standard from the VESA consortium for managing the power supply of video monitors for computers through the graphics card e. g. ; shut off the monitor after the computer has been unused for some time ( idle ), to save power.
This is the case, for instance, with the VESA Local Bus which lacks the two least significant bits, limiting this bus to aligned 32-bit transfers.
A synchronization signal is generated for LC shutter glasses worn by the viewer, using either a standard VESA Stereo plug to connect wired glasses or wireless emitters, or brief flashes of light on the viewing screen during the blanking interval.
The VESA specification is royalty-free.
VESA and standards
Since then VESA has issued a number of standards, mostly relating to the function of video peripherals in personal computers.
VESA has been criticized for their policy of charging non-members for some of their published standards.
At that time no VESA standards were available for free.
Although VESA now hosts some free standards documents, the free collection does not include newly developed standards.
As of 2010, current standards documents from VESA cost hundreds, or thousands, of dollars each.
At the time DisplayPort was announced, VESA was criticized for developing the specification in secret and having a track record of developing unsuccessful digital interface standards, including Plug & Display and Digital Flat Panel.
Beyond display modes, the VESA industry organization has defined several standards related to power management and device identification, while ergonomics standards are set by the TCO.
These are de-facto standards, usually originated by one manufacturer and reverse-engineered by others, though the VESA group has co-ordinated the efforts of several leading video display adapter manufacturers.
A bi-directional, half-duplex auxiliary channel carries device management and device control data for the Main Link, such as VESA EDID, MCCS, and DPMS standards.
VESA and for
By the time there was a strong market need for a bus of these speeds and capabilities, the VESA Local Bus and later PCI filled this niche and EISA vanished into obscurity.
PCI video cards replaced ISA and VESA cards, until growing bandwidth requirements outgrew the capabilities of PCI ; the preferred interface for video cards became AGP, and then PCI Express.
DVI and HDMI have the same electrical specifications for their TMDS and VESA / DDC links.
In November 2010, VESA announced a cooperative agreement with the Wireless Gigabit Alliance ( WiGig ) for sharing technology expertise and specifications to develop multi-gigabit wireless DisplayPort capabilities.
* VESA BIOS Extensions ( VBE ), used for enabling standard support for advanced video modes ( at high resolutions and color depths )
* VESA Stereo, a standard 3-pin connector for synchronization of stereoscopic images with LC shutter glasses
Some people believe the practice of charging for specifications has undermined the purpose of the VESA organization.
Although A. b mice and keyboards have been available ( in limited fashion ) for some time, the only serious attempt to use the system was by the VESA group.
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