HDMI - CompTIA A+ 220-1101 – 1.4
Let’s have a look at HDMI.
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HDMI
HDMI or High-Definition Multimedia Interface has been quite popular in the marketplace with approximately 10 billion devices being manufactured that use it. HDMI supports the transfer of many different types of data over the cable.
The main use of HDMI is the transfer of video. Although there is other technology, like USB, that can achieve high transfer speeds, HDMI was mainly designed with the transfer of video in mind.
The second big use for HDMI is audio. Since HDMI is often used in consumer products, such as home entertainment systems, it is essential that it supports sound.
HDMI also supports copy protection. Copy protection is designed to prevent unauthorized copying from media like optical disk. It does this by encrypting the data traveling between devices, meaning that only authorized devices will be able to decrypt the data. The copy protection has been known to be problematic, with different devices not being able to work with each other. The copy protection has also been cracked, so individuals with the right equipment can defeat it.
HDMI also supports a remote-control feature. Essentially what this means is, multiple devices, in theory, can be controlled through the HDMI cable even if they are not connected directly to each other. To give a simple example of why this would be useful, think of a TV, a sound system and an optical media player. In theory, you would be able to have one remote control to control all the different devices. That is, HDMI would pass the control codes between different devices. Sounds good in theory, but in reality, devices don’t generally communicate with each other unless they are from the same manufacturer, but even that can be problematic.
The last main feature of HDMI is networking, essentially replacing the need to run a separate network cable. This feature never really took off and it would be difficult to find a device that supports it. Later in the video I will look at the reasons why.
HDMI Versions
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References
“The Official CompTIA A+ Core Study Guide (Exam 220-1101)” pages 21 to 22
“HDMI” https://en.wikipedia.org/wiki/HDMI
“Variable Refresh Rate” https://www.hdmi.org/spec21sub/variab...
“HDMI” https://www.hdmi.org/blog/detail/129
“Picture: Film strip”https://pixabay.com/illustrations/fal...
“Picture: Audio equalizer” https://pixabay.com/vectors/equalizer...
“Picture: Speaker” https://pixabay.com/vectors/speaker-l...
“Picture: Copyright theft” https://pixabay.com/illustrations/cop...
“Picture: Copyright and chain” https://pixabay.com/vectors/lock-chai...
“Picture: Remote Control” https://pixabay.com/vectors/electroni...
“Picture: Kitten” https://pixabay.com/photos/cat-flower...
“Picture: Chroma subsampling” https://en.wikipedia.org/wiki/Chroma_...
“Video: Cat Video” https://pixabay.com/videos/cat-sleepi...
“Video: Cat looking around” https://pixabay.com/videos/cat-head-g...
“Video: Birds flying” https://www.pexels.com/video/a-flock-...
“Picture: Headphones” https://www.pexels.com/photo/white-wi...
“Picture: Car” https://www.pexels.com/photo/red-alfa...
“Picture: HDMI connectors” https://upload.wikimedia.org/wikipedi...
“Picture: 4k Logo” https://commons.wikimedia.org/wiki/Fi...
“Picture: 1080p ready” https://commons.wikimedia.org/w/index...
“Picture: Question mark” https://www.pexels.com/photo/question...
“Video: PS5 Death Stranding Director Cut gameplay” • Death Stranding Director's Cut (PS5) 4K 60...
“Video: Army helicopter” https://pixabay.com/videos/soldiers-m...
“Picture: Laptop” https://unsplash.com/photos/M_DMDRj0IuQ
Credits
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