HDR on TV: Testfilm for free download

Use the UHD-HDR test sequence to check the HDR function of your TV.


The test movie


In short, HDR, ie High Dynamic Range, is defined by a massive increased contrast range. First it was said that it is achieved mainly by significantly lighter panels, now is also a massively improved black level the label "HDR" justify. It is of great importance that the considerably larger area between black and white is dissolved by significantly more grayscale and that these steps are of different heights, so that they are not perceived by the eye as streaks in color transitions Code>

Legend for the test picture


On the one hand, HDR always had to resolve with 10 or 12 instead of 8 bits. And once you were there, the old Gammakurve was renovated, with the critical dark tones for the eye already with more data shares were considered. It is now mathematically much more complex and puts much more emphasis on darkness. Now output luminances below 10% of the maximum luminance are assigned to over 75% of the film data values.


This light distribution will be used, among other things, by the Ultra-HD Blu-ray and is also part of the HDR technology DolbyVision. Markings and metadata on how the new dynamics are to be processed can be integrated into the data stream HEVC (High Effiency Video Coding, H.265) and can also be transported via HDMI 2.0a.


Lesetipp: HDR on the TV - what you need to know


The standard has been standardized in standards ST-2084 and ST-2086 by the American organization SMPTE. Here is an HDR chain finished, and these standards are the ones which should support the new TV devices once. That is, when you see such a video stream, you should use the new EOTF curve, white on all light and black on superdunkel.


To verify this, we have created a test image. Specifically, it is a one-minute test film, which can be played over USB directly on many Ultra HDTVs. We have multiplexed it in the formats MKV and TS, because not every TV plays everything.


The video content has Ultra HD resolution and is encoded in codec HEVC with 10 bits. In addition to the HDR information contained, the color space is set to the much more colorful standard ITU-R BT.2020. So the TV should not only be brighter and change its gamma function, but also more colorful.


To see a difference to the old SDR (standard dynamic range) have encoded like a different, content-identical sequence in gamma and color space according to ITU-R BT.709, thus the HDTV standard. Our first lab tests showed that the top TV sets from Panasonic, Samsung, Sony and LG are reacting, but we are not printing the new measurements yet.


Explanation of the test pattern (see the markings above)