Coordinated Video Timings (VESA-2003-9) is a standard by VESA

VESA

VESA is an international standards body for computer graphics founded in 1989 by NEC Home Electronics and eight other video display adapter manufacturers.VESA's initial goal was to produce a standard for 800×600 SVGA resolution video displays...

 which defines the timings of the component video signal

Component video

Component video is a video signal that has been split into two or more component channels. In popular use, it refers to a type of component analog video information that is transmitted or stored as three separate signals...

. Initially intended for use by computer monitors and video card

Video card

A video card, Graphics Card, or Graphics adapter is an expansion card which generates output images to a display. Most video cards offer various functions such as accelerated rendering of 3D scenes and 2D graphics, MPEG-2/MPEG-4 decoding, TV output, or the ability to connect multiple monitors...

s, the standard made its way into consumer televisions.

The parameters defined by standard include horizontal blanking and vertical blanking intervals, horizontal frequency

Horizontal scan rate

Horizontal scan rate, or horizontal frequency, usually expressed in kilohertz, is the frequency at which a CRT moves the electron beam from the left side of the display to the right and back, and therefore describes the number of horizontal lines displayed per second...

 and vertical frequency

Refresh rate

The refresh rate is the number of times in a second that a display hardware draws the data...

 (collectively, pixel clock rate or video signal bandwidth), and horizontal/vertical sync polarity.

The standard was adopted in 2002 and superseded the Generalized Timing Formula

Generalized Timing Formula

Generalized Timing Formula is a standard by VESA which defines exact parameters of the component video signal for analog VGA display interface....

.

Reduced blanking

CVT specifies a mode which uses reduced blanking intervals, saving video signal bandwidth for modern LCD monitors which are not based on cathode ray tubes anymore. This mode is currently only defined for vertical frequency of 60 Hz.

External links

• VESA-2003-9 Coordinated Video Timings standard summary
• VESA: spreadsheet for calculating parameters of CVT signal (free registration required)