How to Calibrate Your Home TV or Monitor with Netflix's Secret 'Test Patterns'
Netflix, a video streaming service, distributes a lot of content that supports 4K resolution, HDR, and Dolby Atmos sound. Therefore, if the monitor or TV you are watching is properly set up, you can enjoy movies and dramas with cinema-quality picture and sound. In fact, Netflix distributes videos called 'Test Patterns,' which can be used to properly adjust the picture quality settings of your TV.
Announcing Electric Eye. an automated computer vision and audio… | by Netflix Technology Blog | Netflix TechBlog
How to use Netflix's 'secret' video test patterns to improve your 4K TV's picture | TechRadar
https://www.techradar.com/how-to/how-to-use-netflixs-secret-video-test-patterns-to-improve-your-4k-tvs-picture
'Test Patterns' can be viewed on the following page. However, you must be a Netflix subscriber.
Test Patterns | Netflix
https://www.netflix.com/jp/title/80018499
At the time of writing, 'Test Patterns' offers five video check patterns: '3840 x 2160 pixels, 59.94 fps', 'HDR10, 3840 x 2160 pixels, 29.07 fps', 'Dolby Vision, 3840 x 2160 pixels, 30 fps', 'Dolby Vision, 3840 x 2160 pixels, 60 fps', and 'Dolby Vision, 3840 x 2160 pixels, 59.94 fps', as well as one video for audio synchronization check.
All of the video check screens are the same, and the playback time is all 120 minutes.
The black box in the top left adjusts your TV's brightness.
As shown in the image on the left, adjust the brightness of your TV so that the three patterns of dark gray, light gray, and black can be clearly distinguished. If the brightness is insufficient, the whole image will appear black, as shown on the right.
And the white box in the upper right corner is a symbol for adjusting contrast.
Adjust the contrast so that dark gray, light gray, and white can be clearly distinguished. If you can see a clear difference, like on the left side of the image below, it's OK, but if you can't tell the colors apart, like on the right side of the image, the contrast isn't right.
The red, green, and blue boxes on the right are for adjusting the color saturation. Adjust each color until the dark areas in the center and the bright areas around it are clearly visible.
Extending to the left and right is the resolution bar, which has graduations indicating the monitor's resolution.
This scale can be used to adjust the sharpness - if it's adjusted properly (like on the left), the numbers on the scale will be clearly visible, but if it's not adjusted properly (like on the right), there will be a white border around the letters (like on the right).
According to a blog post from the Netflix technology department, this 'Test Pattern' is a Netflix-exclusive video developed by a company called
For example, when playing a video, a countdown sound of 'one, two, three' is played. Also, the 'beep' sound that plays when the ball rotating clockwise around the photo comes down is 1250Hz for the first 400 milliseconds and 1000Hz for the last 200 milliseconds. This sound is for synchronizing the video and the camera recording when Netflix is played on various TVs and the camera is filmed and verified by pattern recognition.
Netflix announced Electric Eye in 2015, and in a blog post it said it plans to make it open source in the future, but at the time of writing it has not yet been made public.
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in Review, Software, Web Service, Posted by log1i_yk