How to enjoy 4K resolution video at 60Hz refresh rate at low cost?
One of the factors that affect the image quality of games and moviesRefresh rateThe higher the value, the smoother the video. However, the higher the resolution, the more difficult it is to maintain a high refresh rate, and sometimes expensive equipment is required. Linux-related information siteetbeRussell Coker, who runs the company, is devising a way to enjoy 4K resolution video at low cost while maintaining a 60Hz refresh rate.
DisplayPort and 4K – etbe – Russell Coker
HDMI version released in June 20061.3–1.4 bOnly supports up to 30Hz refresh rate at 4K resolution by default. To realize 4K resolution video without information compression and 60Hz refresh rate, the graphics board and monitor must be HDMI 2.0Must support the above. For cables,Premium high speed HDMI cable"Or"Ultra high speed HDMI cable”Is required.
However, according to Koker, the amount of video information is compressed by thinning out color information.Chroma subsamplingBy applying the 4: 2: 0 format, the refresh rate can be increased to 60Hz or more even with HDMI 1.3-1.4b.
In the area where Mr. Coker lives, the “ High Speed '' HDMI cable is $ 3.98 (about 440 yen), “ Premium High Speed '' is $ 19.88 (about 2200 yen), “ Ultra High Speed '' is $ 39.78 (about 4400 yen) Before buying expensive cables, it makes sense to first consider whether a “ high-speed '' HDMI cable, especially a short cable that is less susceptible to noise, can be substituted for an expensive cable. It says.
In a test conducted by Koker, it was possible to achieve a 60Hz refresh rate at 4K resolution even with an inexpensive high-speed HDMI cable by properly combining the monitor, graphic board and OS. The system devised by Mr. Koker seems to be able to achieve 4K resolution and 60 Hz refresh rate on Windows 10 by using Samsung 4K compatible monitor and NVIDIA GT630 graphic board after applying chroma subsampling. .
In addition, Mr. Koker tried using NVIDIA GT630 on Linux to see if a 4K resolution / 60 Hz refresh rate can be realized, and because the system crashed, “ Recommended for Windows but not for Linux '' Says Corker.
For Linux OS, instead of HDMI cableDisplayPortAccording to the company, 4K resolution and 60Hz refresh rate were realized. As for DisplayPort, DisplayPort 1.2-1.2a released in January 2010 supports refresh rates of 4K resolution and 60Hz or more.