HDMI Cable; why do I need one?

If you own a High Definition Television and use a Blu-ray DVD Player or Hi-Def Cable/Satellite box then a HDMI cable is exactly what you need to get the best picture.

What is HDMI?

HDMI High Speed Cable

HDMI or High-Definition Multimedia Interface is an audio/video cable for transferring digital audio/video signals to a compatible computer monitor, audio device or television. Sources for HDMI could be a HD cable/satellite box, HD DVD player, tablet, game console or digital camera. There are 5 types of HDMI cables but only two are used in home entertainment, HDMI High Speed and HDMI High Speed with Ethernet.

What does HDMI do?

In 2009 HDMI version 1.4 was released. Two major features were added, ARC (Audio Return Channel) and HEC (HDMI Ethernet Channel). So in addition to transmitting audio/video signals HDMI cables now were capable of allowing data communications between devices via HEC. This allows you, in some cases, the ability to control multiple devices with just one remote.  For example, turning off the TV causes it to send a signal to the surround sound receiver to power down.

Devices equipped with an ARC/HDMI port transmit or receive audio signals. So, if you had your Television connected to your cable box and also to a surround system (via HDMI) and were watching a movie then the digital sound from the cable box would be routed through the television to the surround sound receiver.  The beauty of this is not having to change the input source on the receiver each time you change source devices from the TV.

What is it going to cost me?

While I don’t advocate running over to the local dollar store to purchase your HDMI cables, I also don’t recommend you go to the neighborhood electronics boutique and spending $100 either. Those inexpensive cables you find online will work just fine. There are several online sources for cables. Two of them, Amazon and NewEgg have reasonably priced cables in many different lengths.  Expect to spend $5 to $15 for a 6 foot cable.

Which HDMI cable to buy?

Purchasing a HDMI High Speed with Ethernet cable would be the best way to make sure your cable is compatible with a large variety of devices now and in the future. The High Speed cable can handle High Definition beyond 1080p and if Ethernet devices catch on you’ll have that covered.  Don’t worry about version numbers on an HDMI cable since most cables out there are at 1.3 or higher.  Chances are you wont even see a version number. Since January 1st, 2012  the HDMI Association has been “encouraging” vendors not to version number on their packaging.

More Technical Information

Look here if you want a more technical description of HDMI specifications or here if you want to read about the HDMI Association.

HDMI Association relased specifications for HDMI 2.0 on September 4, 2013.

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Robert E Kraus has a background in Computers, Internet Technology and Home Electronics. Currently working in the Information Technology field and also consulting for Home Electronics users. He is also the owner of The Conch Tech and My Conch Life and a contributing author on both sites.

16 thoughts on “HDMI Cable; why do I need one?

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  7. Hi, I just bought a smart tv, 1080 px. I have digital cable and no cable box, the cable goes right in from the wall. My other tv had a great picture, but then it died. The new smart tv resolution is not sharp. The store is telling me I need a box and HDMI cable to get the shap picture. I do not have any devices hooked up because it is a smart tv.
    Do I really need an HDMI cable if I don’t have a cable box?
    Thank you

    • Hi Lucy thanks for visiting. If you are not connecting your SmartTV to a cable box, satellite box or any other HD source device you will not need an HDMI cable. Streaming HD video over the Internet is sketchy for some sites. If you want the best and sharpest picture, in my opinion, you want to get a Blu-ray player.

  8. I just bought a used smart tv. I have it connected with a regular cable wire that comes out of the wall. I also have a DVD player hooked up with the cord that has the yellow and red and white plugs I don’t know what they are called. Anyway my question is Can i connect to the internet to get apps like Netflix and hulu If I don’t have internet in my home? I’m trying to connect via a hotspot or internet of my neighbor’s. I can’t find any setting on the tv to search for WiFi connections. Does that mean it’s actually not a smart tv? Thank you for your help!

  9. I have a desktop in the other room..I have a cisco router an8d a wireless adapter and hdtv. I want to stream movies from pc to tv what do I need to do?

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