HDR (High Dynamic Range) explained

HDR (High Dynamic Range) pixel technology explained

Already an existing Optik TV customer? Check out Am I ready for 4K HDR to see if you’re ready to starting watching Optik TV in 4K HDR.


HDR, or High Dynamic Range, is a new type of display technology that allows television pixels to display a wider range of colour and contrast combinations, providing a more realistic image and immersive viewing experience.

What’s the difference between 4K and HDR?

4K technology displays images at over eight million pixels (3,840 x 2,160), providing four times the detail of 1080p HD (2 million pixels in total). HDR technology enhances a pixel’s ability to become brighter or darker, expanding the set of colours that can be displayed. 4K ensures that the image is clear, while HDR uses colour ranges to create image depth. An HDR TV can cover a wider space within the colour spectrum. To quantify it, a standard dynamic range (SDR) television can display approximately 16 million colours, while an HDR-capable TV can display approximately 1 billion colours. This enables the creation of more realistic images on screen, and helps to mimic what a person might see in reality.

For more information about 4K on Optik, please visit telus.com/4kupgrade.

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Am I ready for 4K HDR?

To watch 4K HDR on Optik TV, you will need the following:

  • An Optik 4K PVR
    Note: Already an existing Optik TV customer? To upgrade to a 4K PVR call us at 1-888-811-2323.
  • A subscription to TELUS Internet 50 or higher
    Note: Already an existing Optik TV customer? To upgrade to Internet 50 or higher log into MyAccount or call us at 1-888-811-2323. An agent can verify if the Optik 4K HDR is available in your area.
  • An HDMI cable (2.0a/2.0b)
  • A TV that supports HDR

With the Optik 4K Digital Box and a subscription to Internet 50 or higher, you’re ready for HDR as content becomes available. To deliver the best viewing experience, Internet 50 or higher is required to support the bandwidth requirements of 4K and 4K HDR video content.

To check if your TV is able to display HDR, check your owner’s manual or check the manufacturer's online support pages for your TV model to ensure that your settings are optimized for HDR. For example, on some Sony brand HDR-capable TV sets, HDMI port settings need to be changed from Standard to Enhanced in order for HDR content to be displayed properly.

What content is available in 4K HDR with Optik TV?

All HDR content that Optik TV supports will also be in 4K. While 4K and HDR are two distinct technologies, when combined, they demonstrate the best viewing experience available. There will still be content in 4K only.

Currently, Optik TV provides customers access to 4K HDR content On Demand and via Netflix.

How do I watch 4K HDR content On Demand?

To access 4K HDR content On Demand:

  1. Select the On Demand button your remote
  2. Access the Featured or Movies folder
  3. Scroll to the 4K HDR folder and select View All to see all available titles

When you rent or purchase a 4K HDR title, you may get access to the HD version of that title at no additional charge, provided it is available in HD, and available as a format bundle. This enables you to watch the chosen title on both your 4K HDR TV set(s) or your standard HD TV set(s) for the full duration of the rental or purchase.

How do I watch 4K HDR content on Netflix?

To access 4K HDR content through Netflix on Optik, you require a premium Netflix subscription (Ultra HD). To upgrade your Netflix subscription login at netflix.ca/changeplan.

HDR titles can be identified by an HDR badge located above the title synopsis. You can also search for HDR using the Search menu and all HDR titles will displayed.

Tune to channel 422 to launch Netflix on your Optik 4K digital box.

What HDR formats does Optik TV support?

Optik TV supports both HDR10 and HLG formats. To view content in HDR10 or HLG, your TV must support each individual format respectively. The most common format is HDR10; another format is Hybrid Log Gamma (HLG) used for live broadcast. Different manufacturers of television equipment (including digital boxes) and content producers use different formats of HDR, sometimes offering support for both.

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