The latest video transmission standards are HDMI and DisplayPort.
For digital standards, HDMI was invented in 2002, and DisplayPort was invented in 2006.
While these standards have the same specific goal, i.e., to send high-definition video to your display devices and there are some significant variations between them.
DisplayPort Vs HDMI Port:
A digital display interface is also known as DisplayPort or DP is a digital display interface.
It was developed by a team of chip and PC makers and then standardized by VESA.
This digital display uses the combination of an external device to a display device, such as a monitor.
In addition to visual signals, the DP may carry audio, several types of data, cables, and connections, and the Universal Serial Bus.
Although this is an optional feature, the DP can simultaneously transmit audio, video data, and signals.
When delivering video signals, the path used for each colour channel could be anything between six to sixteen bits.
The path can be up to eight channels in audio transmissions, such as 24-bit and 192 kHz uncompressed PCM audio.
A half-duplex, bi-directional auxiliary channel is included in the DisplayPort than HDMI.
This transports device control signals that provide data management.
This material includes the main link is available in different standards, including:
- MCCS or Monitor Control Command Set.
- VESA EDID or Video Electronics Standards Association Extended Display Identification Data and
- DPMS or Display Power Management Signalling.
In addition, the DP interface is designed to transport bi-directional USB communications.
The purpose of developing DP was to change several things, including:
- The VGA or Video Graphics Array.
- The Front Panel Display or FPD Link and
- Digital Visual Interface or DVI.
Types of Display Port:
A 20-pin connector is used in DisplayPort, and there are two types:
1. Full-size DisplayPort Connector:
This is the most common DisplayPort connector at the moment.
It’s a twenty-pin connector that’s typically found on computer displays.
2. Mini DisplayPort Connector:
This twenty-pin connector was created by Apple for their 2008 MacBook Pro, MacBook Air, and Cinema Display models.
Most high-end laptops have a ‘Thunderbolt’ port that is essentially a specialized version of Mini DisplayPort which offers higher rates and bandwidth than HDMI.
The following are the various DisplayPort versions, as well as the resolutions and bandwidths that they support:
1.0 – 1.1a:
The primary version of the DisplayPort has a maximum bandwidth of 10.8 Gbps that can transmit 1080p video at 144 frames per second and 4k video at 30 frames per second.1.2 – 1.2a:
The most extensively used DisplayPort version 1.2 was launched in 2010.
This is a tremendous improvement over the previous generation with a bandwidth of 17.28 Gbps.
Due to the increased capacity, users may transmit 1080p video at 240 Hz and 4k video at 75 Hz.
DisplayPort 1.3 was launched in 2014 with a bandwidth of 25.92 Gbps, which is enough to transmit 1080p at 360 frames per second, 4k at 120 frames per second, and 8k at 30 frames per second.
The ability to broadcast an 8k video feed via DisplayPort (No different than HDMI) was added in version 1.3.
1.4 – 1.4a:
When employing DSC and HBr3 transmission speed, Display Port 1.4 has the same bandwidth as version 1.3 but can support 8k at 60 Hz and 4k at 120 Hz.
DisplayPort 2 effectively multiplies the maximum bandwidth from 25.92 Gbps to 77.37 Gbps.
This means that DP 2.0 can transmit 4k at 240 Hz and 8k at 85 Hz.
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High-Definition Multimedia Interface or HDMI is a proprietary interface.
This audio/video interface is specifically designed to transfer uncompressed video signals and data, as well as compressed or uncompressed digital audio data.
You’ll need an HDMI-compliant source device to use the HDMI port, such as:
- A display controller.
- A video projector.
- An HDMI-compatible monitor of a computer.
- A digital TV or
- A digital audio system.
The HDMI port can replace the traditional and analogue DisplayPort with digital signals.
In terms of design and architecture, HDMI meets EIA or CEA 861 standards.
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Types of HDMI Ports:
HDMI ports currently have a 19-pin configuration in three different types:
1. Type A:
In televisions, projectors, and monitors, this is the most common HDMI port.
This 19-pin connector sometimes known as Mini HDMI is found in tablets and small laptops.
2. Type D:
Micro HDMI is used in smartphones to reduce space.
Type B and Type E HDMI ports are two different types of HDMI ports that are rarely used.
Type B connectors have 29 pins that can be used for dual-link applications.
The locking mechanism on Type E HDMI connectors prevents it from slipping away under severe vibration than DisplayPort.
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Versions of HDMI:
The HDMI standard is available in several variations, including:
1.0 – 1.2a:
The original version of HDMI was released in 2001, and it featured a bandwidth of 3.96 Gbps.
This enabled the transmission of 1080p video feeds at 60 Hz.
Version 1.1 had the same characteristics as version 1.0, but with the addition of DVD Audio support.
HDMI 1.2 and 1.2a support one-bit audio and fully specified CEC.
1.3 – 1.4b:
In version 1.3 the maximum bandwidth was increased to 8.16 Gbps and until version 1.4b the same bandwidth was retained.
It can transmit 1080p at 144Hz, 1440p at 75Hz, and 4k at 30Hz owing to the increased bandwidth.
2.0 – 2.0b:
HDMI 2.0 was offered as HDMI UHD.
The cable’s video bandwidth was increased to 14.4 Gbps, allowing it to carry 1080p at 144 Hz successfully.
HDR support was enhanced with HDMI 2.0a, then it was improved further with HDMI 2.0b.
HDMI 2.1 allows 4k and 8k video to be transmitted at 120 frames per second.
This was accomplished by a video bandwidth up to 48 Gbps.
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Frequently Asked Questions:
What is the difference between DisplayPort and HDMI?
DisplayPort is used for computer and peripheral visual connections, whereas HDMI is used for consumer electronics equipment.
What is a DisplayPort?
DisplayPort is a digital display interface, particularly for computer monitors.
What is an HDMI port?
HDMI stands for High Definition Multimedia Interface and is the most frequently used HD signal for transferring both high definition audio and video over a single cable.
HDMI cables are often pretty small in length than DisplayPort.
HDMI cables are used in household televisions and monitors, and the video stream is transferred between devices that are close nearby.
For distances up to 2 meters, a passive copper DisplayPort cable can transfer 4k signals with comfort but as the distance increases, the capacity decreases.
Passive copper cable can transmit 1080p video at a distance of 15 meters, but DP cable can transmit 2560×1600 HD video for a distance up to 20 meters.
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