Monday, January 24, 2011

RGB port

* Table of contents:

S. No.


Page No. (From- To)







RGB port


Use of RGB port


Effect of cables due to its length







My given topic is RGB port. I have classified different section in which I have discussed the given topic.

In my report I have dealed with an intresting electronic device i.e rgb port

In my first section I have explained that what is RGB Port?

In next section I have discussed its History .

I have discussed different version,parts of RGB Port and effect due to its length.

I have dealed with male and female part of RGB Port.

And in last section I conclude my opinion and use of RGB Port.


How about a Black & white life? Imagine our favorite TV shows in Black & White. Simply horrible! We are addicted to a colorful digital life & being digital every another day. All the colour to our life is because of none another then the three primary colors which are used in a RGB port. These colors are red, green & blue. A RGB port uses these colors to produce other secondary colors by combining primary colors. Then these colors are projected on the screen of colors TV sets to add taste to our life. Collectively RGB port is device which produces colored images and videos on a screen by the use of primary colors. These are in form of cables consisiting of a connector & a port.


HDMI cables transmit high definition digital video & audio to HD TV’s. HDMI cables have been updated several times since there initial release. Each new version includes new support features

· Version 1.0 : HDMI version 1.0 was released in Dec 2002. It offers a single cable digital audio/ video connections that has a maximum transmission bit-rate of 4.9GBPS & supports video resolution up to 1080 pixel.

· Version 1.1 : HDMI version 1.1 was released in May 2004. Basic difference between 1.0 & 1.1 was that the later had support for DVD audio( meaning high resolution audio, not audio from DVD disks) if both devices are rated for version 1.1

· Version 1.2 : it was released in Aug 2004. It added direct stream digital support, enabled PC interfere support& permitted use of PC native RGB video formal.

· Version 1.2a : it wa released in Dec 2004. Its updated support of CEC( i.e consumer Electronic Control) is a feature thatpromised to improve interoperability between different electronic components.

· Version 1.3 : HDMI version 1.3 was released in June 2006. This is the current version of the HDMI cables( as of 2009). It offers an high transmission bit-rate of 10.4 GBPS, deep color support and a mini connector port for intfacing with HD camcorders

There are two types of HDMI cables:

Ø TYPE A: this type of HDMI cables is the consumer type that carries both high definition Audio & video. It consists of 19 wires & is the most commonly used cable for connecting electronic components.

Ø TYPE B : this type has 29 wires & is designed for the motion picture industry movie making and editing.


RGB, the computer's native color space, which is the color system for capturing and displaying images. RGB was derived from perception of colors sensitive to human eyes that are red, green and blue. The name of the model comes from the initials of the three additive primary colors, red, green, and blue. The three light beams are added together which makes the RGB color model additive as the spectra of light add wavelength to wavelength to produce final color’s spectrum.

Cameras and scanners capture color with sensors that record the varying intensities of red, green and blue at each pixel location in the frame. For screen display, red, green and blue pixels (dots) are energized to the appropriate intensity. When all three pixels are turned on high, white is produced. As intensities are equally lowered, shades are derived. The base color of the screen appears when all pixels are off.

RGB port is also called as Graphics Port or VGA port. It is a socket on the back side of the computer used to connect a monitor or projector or a HDTV ( High Definition Tele-vision). RGB port & a VGA is nearly same thing. RGB ( Red, Green, Blue) is used for separate input & VGA ( i.e Video Graphics Array) is used for same thing.

Generally, RGB port has two sections:

I. VGA Connector: A long wire having two end sides, consisting 3X5 pins each called as VGA connector wire or pin. It has nine wires. It is built into most graphics cards and is used to send 3 analog signals to the monitor, which correspond to the red, blue, and green components of the image. A VGA connector may also be called as

ü RGB connector

ü D- sub 15

ü Mini sub D 15 &

ü Mini D 15 connector

It is a three row 15 pin DE-15 connector having four versions

ü The original VGA 15 pinout connector

ü DDC2 pin out

ü The older. Less flexible DE-9 connector &

ü The mini VGA used in Laptop and computers

It is generally used in video cards, computer monitors & HDTV. VGA connectors and cables are used to carry analog components RGBHV( Red Green Blue Horizontal & Vertical sync) video signals, a Display Data Channel( DDC2) digital clock & data.

When device size is a spatial constraint( i.e laptop, computers) then a mini VGA port is occasionally used in place of full size VGA connector. The 15 different pins has functions as follows.
The (1,6), (2,7), (3,8) pairs are use to convey the video signals of Red, Green and Blue colors respectively. The pin 13 and pin 14 are used for Horizontal and Vertical Syncing. The 5 and 10 pins are used as ground and other pins are of less importance to us.

v WORKING: generally in personal computers for a long time use 15- contact interface Mini- D-sub is used for connection of the monitor.

VGA transfers signals of Red, Green & Dark Blue colors & also informs about horizontal( H-sync) & vertical( V-sync) synchronization.

connector_vga.jpg VGA%20Connector%20preview1_jpg8f9dcb9c-eb77-464a-ab55-567ceaded98aLarge.jpg

Fig1[1] fig 2[2]


There are fifteen pins in the cable wire, different pins generate different signals.

ü 1 => Red video

ü 2 => green video

ü 3 => blue video

ü 4 => monitor ID-bit 2

ü 5 => ground

ü 6 => red ground

ü 7 => green ground

ü 8 => blue ground

ü 9 => [key]

ü 10 => sync. Ground

ü 11 => monitor ID- bit 1

ü 12 => monitor ID- bit 0

ü 13 => horizontal sync.

ü 14 => vertical sync.

ü 15 => N/C (reserved)

II. VGA port: this is the socket on the back of a PC that is used to connect a monitor. It has 3X5 holes in which VGA connector pins are inserted. The 15-pin VGA connector is common to most video cards, computer monitors, and high definition television sets that support VGA-connector devices. It is usually known as an “HD-15” (High Density 15) or “DE-15”.


Ø When we connect our RGB projector to our DVD player then it allows us to enjoy our favorite DVD media in crisp high definition.

Ø It helps in relaying the video signals from our projector to our DVD player which experiences the breathe taking clarity of high definition on a large scale.

Ø The RGB ( also known as component video) port on our projector uses three cables i.e Red, Blue, & Green to process video as opposed to the single yellow cable of the composite port.

Ø Without RGB port, we cannot setup our home theatre.

Ø It gives maximum HDTV resolution.


Other audio/ video connection cables do make a difference in performance due to its length. Similarly, HDMI cables also do make a difference in performance. Longer cables will yield a loss in over all quality but it may not be noticeable. HDMI cables are around 15 feet in length but shorter are best to perform than longer cables. It is necessary to use long cable than use a signal booster/ extension adapter to connect shorter length HDMI cables together. The signal booster will return any loss of overall quality.


After working on this topic, I conclude that basically RGB port has two sections which may be defined as male & female DE-15 input & output respectively. I gained a good command on this topic regarding its working, function & use. I also conclude the similarity between VGA & RGB port.





No comments:

Post a Comment