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The HDMI cable has come to replace many of the cables you would have seen with your older television sets. High-Definition Multimedia Interface (HDMI) allows you to connect two HDMI compliant devices to transmit information such as video and audio between them. They are the standard choice amongst high-definition TVs (HDTV).
This type of connector was developed in 2002, with the intention of a backwards-compatible audio-video (AV) connector for Digital Visual Interface (DVI). Hitachi, Panasonic, Philips, Silicon Image, Sony, Thomson, RCA, and Toshiba began the development of this technology and are known as its founders.
The founders created the HDMI Forum on the 25th October 2011, which now serves as the centre for the development of the HDMI specification. More and more gadgets can be seen adopting this transmission. There are different types of HDMI connectors. However, they all are now used as a replacement for analogue video standards.
The DVI does not require any licence for interfacing HDMI. Companies need to apply for HDMI licensing through the HDMI LLC to be able to incorporate the technology in their products. This is because the HDMI specification is not an open standard.
Companies pay a fee to become HDMI adopters, which then allows them access to many rights but most importantly they get access to the compliance test specification (CTS). The CTS is vital for compliance and certification for any HDMI compliant products to be sold legally.
In this blog post, you will learn all about HDMI cables and their functionality. Armed with this information, you can get the best experiences from your digital gadgets!
The HDMI allows you to send high-resolution digital video, with theatre-quality sound and device commands. Unlike older AV cables, such as composite cables that separate the audio and video signals into individual lines, HDMI uses a single cable to pass the signal through the connector.
HDMI connectors are the ends and the ports via which the cable connects two separate devices. They are of type male and female. Usually, the male connectors are at the ends of the cable while female connectors can be found recessed into the devices as the ports.
However, the reverse can also be seen in some applications with protected male ends in devices. The positioning of the connectors is done to prevent short circuits by accidental shorting through an external metallic object.
Even though there are five HDMI connector types; the Standard connector, Mini connector, and Micro connector sizes are the most common ones. The following table summarises the different connector types.
Connector TypeSpecificationFeaturesStandard(Type A)HDMI 1.0• The male connector (plug) outside dimensions: 13.9 mm × 4.45 mm.Broadly, HDMI cables can be classified into Standard, High-Speed, and Ultra-High-Speed HDMI cables. The former two are further sub-categorised based on Ethernet and Automotive applications.
Cable TypeResolutionBandwidthFeaturesStandard(Category 1)1080i or 720p4.95Gb/s• Designed for common HDTV broadcast, cable, satellite TV, and some older applications.For modern devices, such as your ULTRA HD televisions, HDMI is the primary cable for data transmission. These cables can also come with added features that improve the overall quality of the transfer. These cables can be bidirectional or directional.
Passive HDMI Cable: The majority of the HDMI cables in use are passive cables that allow the transfer of information in both directions. Thus, you can connect either end to an HDMI input or output connection. You can expect stable connections for up to 15 feet/4.5 metres with these cables.
Active (Amplified) HDMI Cable: Increased lengths of HDMI cable require additional boost for reliable transfer of signal. This can be achieved using an active HDMI cable that comes with amplification circuitry built into one connection head.
While these cables work with internal power, some may come with USB power or AC adapter power source connection cables.
Optical HDMI Cable: These HDMI cables use optic fibre cables to transfer video and audio signals. These are very thin and are cables of reliably transferring signals over longer distances without any external power.
The numbers on the HDMI are specifications describing the protocols, signals, electrical interfaces and mechanical requirements. Since its conception in 2002, the HDMI has undergone many upgrades for better audio and video transmission.
Here we answer some of the common questions asked and searched about HDMI cables.
The standard HDMI cable has a male connector at either end of the cable. While in most situations this offers comfortable use, it may be hard to use where space is limited.
In situations wherein bending of the cable may occur, you can opt for a right-angled HDMI connector. These connectors are ideal when the devices are too close to walls or other unmovable objects, or when the normal cable may have to be sharply bent.
Alternatively, you can also find right-angled adaptors. However, they are not an ideal choice as they add further to the cabling and may not be as secure.
HDMI connection between two devices is done via the ports and the associated cables. As mentioned earlier there are 5 types of connectors; hence, there are 5 types of HDMI ports. However, the vast majority of devices can be seen with Standard, Mini, and Micro ports.
When you want to connect your mobile, laptop or even a tablet as the source to any HDMI-enabled device, you can opt for the HDMI Alt Mode. This USB Type-C to HDMI cable allows you to use the reversible USB-C connector with any native HDMI connectors.
This cable connection supports the full range features of HDMI 1.4b that include:
While the most common colour for the connector is silver, you will find some brands opting for gold.
The gold coating is meant to prevent the oxidisation of the connector. However, the gold content is rather low and the coating is not necessary unless the cable is used in a damp and moist environment.
HDMI adaptors or cables can be used to create connections between HDMI connectors of different types and even other non-HDMI interfaces. These offer you the ability to enjoy consistent HDMI capabilities at both ends.
HDMI switches can be used to connect multiple HDMI connectors to a single HDMI port. These gadgets have multiple input ports and a single output to a display. These can also be found with remote controls to switch between the different inputs.
Similarly, when you want to display on multiple screens from a single source device, you can use an HDMI splitter to do it. You can learn more in our blog post about connecting old gaming consoles with an HDMI cable.
Dust, dirt, or grime can introduce unwanted factors in your connections. These can make the cables not work as efficiently as they should. Follow these steps to get your cables and connectors clean:
For stubborn dirt and grime, use isopropyl solution or appropriate cleaning products. Ensure your devices are completely turned OFF and not plugged into any power source. Soak an earbud in the solution and wipe the connectors. A toothpick can also be used to remove dirt from hard-to-reach places.
Wipe the connectors with a lint-free microfibre cloth and ensure all areas are completely dry before you use it.
Wireless HDMI are great alternatives if you do not like the mess of cables. These are also ideal for set-up boxes, though not so much for gaming consoles since they introduce a bit of lag.
These connectors come in pairs; one connects to the source while the other to the output. These transmit via microwave frequency. Some wireless connectors come with built-in IR transmitters that will allow you to use TV remotes to control devices.
Before we can conclude, here are a few things to remember before buying an HDMI cable.
We hope our post has helped you learn more about HDMI and how to use it to enhance your audio-video experiences. If you are looking for more cables and adaptors or simply want answers to your questions about them, then get in touch with us!
At MyTrendyPhone, you will also be able to enhance your video and audio experiences with innovative and useful gadgets and devices. Let’s have a chat to find your next useful find.
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