Sony’s XH90, XH900H, X9100H, and XH92 series TVs have previously been exposed to blurry pictures when the 4K 120Hz signal is input. When some users use Nvidia discrete graphics card to input 4K 120Hz signal through HDMI 2.1 interface, the picture is obviously blurry than when 4K 60Hz signal is input. In addition, if the user is using PS5 for 4K 120Hz, the picture will be seriously blurred.
Recently, Sony upgraded the v6.0414 firmware for these TVs to try to solve these problems. According to the official description, after upgrading the firmware, if users need to input a 4K 120Hz signal, they need to connect to the HDMI 3 or 4 interface and turn on “Enhanced Format” in the settings.
However, according to Vincent Teoh, the reviewer of YouTube @ HDTVTes t, Sony’s firmware update did not completely solve this problem. Judging from the demo video, this version of the firmware only performs a sharpening operation for the 4K 120Hz signal, which looks clearer. Although there are some improvements compared to the previous one, it actually does not completely solve the blur problem.
At the same time, the reviewer also said that the Sony PS5 will automatically reduce the image quality and rendering volume when outputting a 4K 120Hz screen. Therefore, when players use PS5 to connect to a 4K TV for gaming, the best choice is to set the output refresh rate to 60Hz.
Although many TVs currently claim to support the 4K 120Hz format, only the in-camera decoding can perfectly support it. Due to limitations of HDMI interface processing chips, firmware, etc., this specification may not actually be met. According to the specifications, HDMI 2.0 supports up to 4K 60Hz, and HDMI 2.1 should support up to 4K 144Hz video specifications.
However, as the refresh rate increases, the amount of data also needs to be doubled. At this time, a bandwidth close to 40 Gbit/s is required. According to some domestic consumer feedback, there are currently no strict certification specifications for the HDMI 2.1 interface receiving chip and HDMI 2.1 transmission cable, which leads to the actual performance of the TV not meeting the requirements.
