High Definition Multimedia Interface (HDMI)

HDMI (High Definition Multimedia Interface) i.e. A digital connector used to carry audio as well as display signal between two devices.

Objectives of designing a HDMI interface

It was designed to overcome the disadvantages and to enhance the features of DVI.

Advantage of HDMI cable:

• A single cable of HDMI can serve both video as well as audio signal
• High definition picture
• Quality resolution video output
• Future compatibility
• Great mobile connectivity
• Quality color saturation
• It permits signal transmission in uncompressed format
• Compatible with display ports
• Large bandwidth
• Capable of maintaining signal integrity
• It permits automatic configuration through Extended Display Identification Data which act as an intelligent parameter for best resolution identification
• Ease to use
• Permits interaction of two devices
• It support deep colors i.e 10 bit, 12 bit and 16 bit (RGB or YCbCr) for rendering multiple colors
• This HDMI standard supports Authentication and Encryption features
• It permits hot plug detection to identify connection of a cable
• It acts as a high speed cable which can able to handle WQXGA resolutions

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Categories of HDMI cables:

Standard cables (Category 1 HDMI)
Acts as a standard speed cable which is further categorized into three wires i.e. Standard, standard with Ethernet and standard Automotive.

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Applications of Category 1 HDMI cable:

Used in areas where high-definition sound, shared internet connections, and device networking are required.

Automative applications.

High-speed cables(category 2 HDMI): These cables act as high speed cable which is further categorized into high speed HDMI and high speed HDMI cable with ethernet.

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Applications of category 2

Emerging technologies including 3D,3.4 Gbps, and 4K videos and also applicable in internet connections.

Pins of HDMI connector
It include 19 pins.

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Applications of HDMI cable:

• HDMI cables are used with Ethernet for internet connections
• Used in advanced electronic devices which require improved picture and sound
• Projector
• Set-top box
• DVD player
• DTV
• A/V receiver
• Video monitor
• TV

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Trending version of HDMI

a) HDMI 1.4 (2009)
b) HDMI 2.0 (2013)
c) HDMI 2.1 (2017)

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HDMI 1.4 (2009)

Main Features

• Integrated size
• It support 3D
• 4K resolution compatibility
• Permits digital content distribution
• Color space compatible i.e. it supports 16 b color bit depth
• Internet connection sharing
• Bandwidth is 10.2 Gbps due to which it can support 30 Hz UHD

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HDMI 2.0 (2013)

Main Features

• It Supports HD videos at 120 HZ
• Dynamic synchronization
  

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HDMI 2.1

Main Features

• It supports ultra speed 48G bandwidth
• Quick media switching
• Variable refresh rate
• Quick frame transport

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Why HDMI cables are popular?

Because it supports 32 channel Audio, videos, and 100 Mbs Ethernet.