HDMI ports will gradually replace VGA, DVI ports, etc. Why?

As a technology person, you don't know about these ports, it doesn't seem very good 😀, but I believe that more or less, you have d...


As a technology person, you don't know about these ports, it doesn't seem very good 😀, but I believe that more or less, you have differentiated each type and function / its application. right?. Of course it is, but to better understand these connection standards, not everyone knows. Therefore, in this article, I will go deeper and learn more about these communication standards so that you have a more accurate one. If you are interested, please read the article and join the discussion below to make the article more complete!
1. Learn about HDMI connection standards
HDMI (its full name is High-Definition Multimedia Interface) is a connection standard that allows to transfer high quality images and audio (from DVD, computer, camera ...) through a cable to the projector. or TV .... In general, it helps you project a larger screen but still ensures resolution and sharpness compared to the original image and video.

If we previously wanted to transmit similar content on an analog cable, we had to use up to 3 video connection cables (component ports) and plus 6 analog audio cables, to be able to transmit Images and sounds. But now with DHMI, you only need 1 single cable.
Operation principle of HDMI cable
The HDMI cable head is composed of 19 copper pins, and each of these copper pins ensures a different task. In the process of data transmission (image and sound), it will always follow a certain principle.

1. TMDS Channel 2 +                                              10. TMDS Clock +
2. TMDS Channel 2 Group                                      11. TMDS Clock Group
3. TMDS Channel 2 -                                               12. TMDS Clock -
4. TMDS Channel 1 +                                              13. CEC
5. TMDS Channel 1 Group                                      14. No Change
6. TMDS Channel 1 -                                               15. DDC
7. TMDS Channel 0 +                                              16. DDC
8. TMDS Channel 0 Group                                      17. DDC / CEC Group
9. TMDS Channel 0 -                                               18. + 5V Power and 19 pins are Hot Plug Detetc


What is HDMI again?
According to the official announcement from the organization that represents HDMI (HDMI Licensing) developers, HDMI has five different types:
1. Standard HDMI signal cable - only supports 1080i / 6oHz level resolution.
2. High-speed HDMI signal cable - supports up to 1080p resolution, Deep Color, 3D (standard 1.4) format.
3. Standard HDMI signal cable (with Ethernet) - same as standard HDMI cable but with an Ethernet line.
4. High-speed HDMI signal cable (with Ethernet) - same as a high-speed HDMI cable but with an Ethernet line.
5. HDMI Automotive signal cable - support connecting HDMI transmitter with HDMI device in the car.
Which device is HDMI port used for?
For HDMI ports, we can also use on many devices. And it has 3 main sizes: HDMI standard, Mini HDMI and Micro HDMI.


Inside:
Standard HDMI + is too popular and it is used a lot on devices such as computers, projectors, camcorders, TVs, DVD players ....
+ Mini HDMI is often used for devices such as: DSRL camera, Video card or tablet ...
+ Micro HDMI is often used for phone devices such as Sony Xperia ARC, LG Phones, tablets ....
How many meters does HDMI transmit?
Similar to other signal cables, HDMI also has its limitations. And the best range and transmission range is between 20-25 meters. If it exceeds this range, it will certainly be noisier than the original quality of the image and sound.
2. Learn about VGA connectivity standards
VGA (its full name is Video Graphics Array) was developed by IBM since 1987. It only allows video signal transmission, and if you want to hear the sound, it is imperative that you go one more way. other.

The VGA cable can be used with various resolutions ranging from 640 × 400px @ 70 Hz (24 MHz) to 1280 × 1024px @ 85 Hz (160 MHz) and 2048 × 1536px @ 85 Hz (388 MHz). In which MHz is the signal bandwidth!

In fact, VGA connection standard is still widely used and popular because the price is much cheaper than standard HDMI connection. However, it has the disadvantage of only transmitting video signals, and it is only suitable for convex displays (CRT), which are no longer suitable for new LCDs today.
Operation principle of VGA cable
VGA has 2 basic standards which are standard 9-pin and 15-pin standard. However, the 15-foot standard is the most widely used and popular. That's why we will learn more about the standard of 15 feet!
Basic information you need to remember:
- Number of feet is 15.
- Connection standard: DE-15
- Video transmission signal: RGB video signal with vertical and horizontal sync signal.
Details of the pins are as follows:
1. Red - Important                                    9. KEY / PWR
2. Green - Important                                10. GND (VSync)
3. Blue - Important                                  11. ID0 / RES Monitor ID bit 0
4. ID2 / RES Monitor ID bit 2                12. ID1 / SDA Monitor ID bit 1
5. GND (HSync)                                     13. HSync - Horizontal sync signal
6. RED_RTN returns the red signal        14. VSync - Vertical sync signal
7. GREEN_RTN pays the green signal   15. ID3 / SCL - Monitor ID bit 3
8. BLUE_RTN pays the blue signal
Tips:
Of the 15 pins on the VGA cable, 5 are the most important: the 1, 2, 3, 13, 14 pins.
In theory, if the other leg is broken apart from the above 5 pins and 2 GND pins (5, 10), that VGA cable will still work.
If one of 3, 1,2, and 3 is broken, it will definitely result in the wrong color or even the color loss.
If the 13th and 14th legs are broken, it is best to throw it away 😀, because it will not be visible.
3. Learn about DVI connection standard
DVI (full name is Digital Video Interface) developed by DDWG (Digital Display Working Group). And the DVI port is quite popular today, and it looks very similar to the VGA port. However, its structure is completely different. Instead of 15 feet, the DVI interface is designed with 24 signal pins. It really supports very well for analog and digital video.

The DVI standard can display resolutions at 1920 × 1200 HD video, in addition. with dual DVI standard, the resolution it supports can be up to 2560 × 1600 pixels.

Some DVI cables have fewer signal pins that are suitable for devices with lower resolutions, so if you want to buy a standard DVI connection, consider choosing and using it. to avoid wasting your money.

One drawback of the DVI standard is that it does not support HDCP encryption standard by default. That's why there are cases where the video card of the user only supports DVI port, it will not be able to fully display Blu-ray full HD as well as some other HD standards.
Why can HDMI replace other connection standards?
With outstanding advantages of HDMI such as:
- Transfer both images and sound with a single cable.
- Simply put, simply plug in an input device that transmits the signal (DVD, computer, camera ...) and plug the other end into a device that emits a larger screen than it is finished (eg TV, projector ...)
- High quality Video output, HDMI has enough bandwidth to play a HD Video with resolutions up to 1080p and 60 frames per second. This is the highest bandwidth level in the current signal range.
- Similar to audio: HDMI standard supports up to 8 24-bit audio channels at 192GHz. Thus, with that parameter, it is overpowered to run high quality audio systems like DTS-HD Master Audio and Dolby TrueHD.

- High-bandwidth Digital Content Protection (HDCP) support allows copyright protection on HDMI-based devices. When two devices are connected via HDMI, HDCP requires these devices to confirm that these are two legitimate devices. Copyright protection is inherent in multimedia companies, such as movie theaters, to avoid unauthorized copying of movies and TV shows.

With the current technology development period, plus Laptop manufacturers and numbered manufacturers are racing to configure, the integration of HDMI port is very easy to understand and many companies are bravely eliminating both VGA ports (eg DELL, SamSung, Apple, Inter ..). They force users to use HDMI or DisplayPort communication standards if they want to transmit signals.
Epilogue
Above are the basic knowledge of HDMI, VGA and DVI connection standards that you need to understand. And I'm sure one thing in just a few years, the HDMI standard will become the most popular and will be the default standard on most digital devices. The article has references from many sources and knowledge that I have accumulated, hoping the article will be useful to you. Good luck !

If you have any comments or more useful knowledge but I still lack in the article, please feel free to comment right below. Thanks you!
Source: Compiled from many sources

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High Tech Brain: HDMI ports will gradually replace VGA, DVI ports, etc. Why?
HDMI ports will gradually replace VGA, DVI ports, etc. Why?
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