Standard and High Dynamic Range (HDR) – Brief History
HDR10+ is the latest HDR (High Dynamic Range) format, an improvement upon HDR10 due to the adaptive way it processes colour in each scene.
But before we delve too deeply into the world of HDR10+, it’s important to know a little bit about the history.
Before HDR, TV colour and contrast standards were based on Standard Dynamic Range (SDR) metrics which were established a number of decades ago. Standard Dynamic Range was restricted due to the limitation of the cathode ray tube (CRT) television sets it was being used on.
SDR generally offers less than half of the dynamic range able to be perceived by the human eye.
Now, HDR enabled TVs are able to display a significantly expanded range of both colour and contrast, delivering what is known as High Dynamic Range (HDR). In other words, HDR enabled TV’s expand the contrast ratio and colour space to offer a more realistic and natural image closer to the way your eyes actually see the real world. Deep blacks are combined with brighter highlights to produce a level of reality not previously possible.
Watch the video below for a brief overview of the difference between SDR and HDR.
Before: Standard Dynamic Range (SDR)
Resolution: SDTV/HDTV, Colour Space: Rec.709, Brightness: 100-300nit
The expressible brightness range is narrow, making images appear darker than in the real world.
Now: High Dynamic Range (HDR)
Resolution: 4K Ultra HD, Colour Space: BT2020, Brightness: 1,000nit
The expressible brightness range is expanded, and the amount of colour information is increased in dark and bright areas.
How Does HDR10+ Differ from HDR10?
HDR10+ is an open, royalty-free dynamic metadata platform for High Dynamic Range (HDR), created by 20th Century Fox, Panasonic, and Samsung.
Together the 3 companies formed a licensing entity that began licensing the HDR10+ platform in January 2018.
HDR10: Static Tone Mapping
With static metadata, one fixed tone mapping curve is applied across the whole film
based on the scene with the highest luminance, meaning that some scenes may be
HDR10+: Metadata Tone Mapping
With HDR10+ dynamic metadata, the tone mapping curve is adjusted
scene-by-scene to enable the most optimal visual reproduction for each scene.
Furthermore, the ease of authoring video content will lead to much more HDR film
and episodic content becoming available.
Optimised only for the brightest scene in the content
Optimises each scene
What is Metadata?
Metadata is descriptive, structural, statistical, or other types of information that provide data or information about which it references. The HDR10+ format carries metadata containing the brightness/gamma information on a scene-by-scene basis.
The diagram to the right illustrates how Static Metadata found in HDR10 is fixed throughout the entire film, based on the brightest scene of the content, whereas the Dynamic Metadata found in HDR10+ adjusts and optimises each scene individually throughout the entire movie.
Panasonic Delivers an Incredible HDR Experience
1) HDR Metadata Creation
Panasonic's unique processing technology creates metadata and adds it to normal HDR10 signals. This turns even conventional
HDR into more lifelike images.
HDR Metadata Creation
Analysis and tone mapping are adapted to each scene.
Even Non-HDR10+ Content Reproduces Real, Lifelike Images
2) HDR Brightness Enhancer
The images in dark scenes are difficult to see in bright room conditions.
A sensor built into the TV detects the room brightness and automatically adjusts the HDR picture quality to match it.
Enjoy Images with Excellent Contrast and Colouring
Even in a Brightly Lit Room