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Recent content by jstabb
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J
2017 LG OLED
Your math isn't wrong, but as you note, you're not accounting for any overheads. Just the 8b/10b encoding that HDMI uses reduces the effective bandwidth of HDMI 2.0b to 14.4 Gbps. The best HDR we'll get over HDMI 2.0 is 4K/60 12-bit 4:2:2. -
J
4:4:4 limited vs RGB full, which is preferred? and HDMI 2.0a vs 2.0b switches?
None of the art assets in a game need to be HDR for the game to take advantage of HDR. The dynamic range in a game is a result of the rendering engine applying light to the scene (just like real life). All modern game engines already render in HDR. At the end of the post processing phase of... -
J
New Samsung 4k for everyone.
More or less. It's the 16.7ms between screen refreshes (for a 60hz refresh rate). So, if Leo Bodnar measured 38ms in PC mode, I would measure anywhere from 38ms to 54.7ms in 4k. I would get consistent measurements for the duration of a "sync", but as soon as the display and PC re-sync (because... -
J
New Samsung 4k for everyone.
It was *extremely* prototype, as in a breadboard with wires leading to the sensor. I've considered finishing it enough to distribute a handful of them in an attempt to build an online database of display input lag and PWM frequencies. But I've always got more projects going on than I can finish... -
J
New Samsung 4k for everyone.
This is similar to what I measured on a 40JU7500. I built an input lag and PWM measurement device that used my PC as the video source, so that allowed me to feed any resolution I wanted into a display. It was a prototype, but was within 1 ms of the Leo Bodnar on every display I was able check... -
J
New Samsung 4k for everyone.
Who knows. The cynic in me says it's most likely due to cost reasons. The wear and tear from switching on/off is 10x more with a PWM rate > 1000hz, which would require higher spec'd parts. But, the fact that it's 120hz PWM on a 120hz panel seems like more than a coincidence. I'm guessing the... -
J
New Samsung 4k for everyone.
I'm very interested to hear how your PWM mod goes, but your explanation of PWM duty cycle is incorrect. The frequency of the pulse does not change with duty cycle (DC), only its width. So for a 120hz PWM signal, the pulse cycles 120 times per second, or every 8.3ms. At 100% DC that 8.3ms... -
J
Seiki SE50UY04 3840x2160 50" TV ($1300)
Has anyone tried to get 3D Vision working with this monitor/tv? I saw some discussion about it earlier in the thread, but no results. Thanks!