Teranex HDMI to SDI converter 4K sharpness issue.

Hi All,
Question regarding the Teranex HDMI to SDI converter. If I have 4K signal coming in from HDMI, will the SDI output be "TRUE" 4K output? I then feed the SDI output into the Teranex Mini SDI to HDMI for 3D lut management.

4K HDMI signal >>>> Teranex HDMI to SDI >>>>> Teranex SDI to HDMI for 3D lut management >>> LG 4K TV.

I am seeing sharpness falloff when I do that versus plugging in the HDMI directly into TV. Any thoughts? Does the HDMI to SDI convert it down then backup somehow? The box says UltraHD up conversion... which kind of worries me. Please help!

Thanks,

Depends on your settings.. There is a dipswitch setting that will allow Downscaling on the mini converters..

Also HDMI > SDI > HDMI is not really recommended. It should sustain all information as it is quite 1:1 signal conversion.. But thumb rule is that every conversion will make the signal worse..

What happens if you switch off the LUT ?
Check if the SDI output is 4K (6G sdi or HD-sdi)
And check if the monitor receives 4K or 1080HD. ** Menu > Signal Info

Thanks for the response. Switching off/on the LUT doesn't seem to affect quality as I have generated a pretty high quality 33x33 cube lut. Due to the current setup, I am pretty limited to this video path unless there is a 4K 3D Lut HDMI box available with affordable price. Anyone know any brand out there that does 4K and HDMI? Not sure why Blackmagic hasn't release a 4K HDMI input/output version yet. Thoughts?

I uee the SDI out of my Mini Monitor 4k and feed that to the Teranex Mini. The Teranex holds the LUT and feeds my client display with HDMI in UHD res. All fine...

Hi All,
Question regarding the Teranex HDMI to SDI converter. If I have 4K signal coming in from HDMI, will the SDI output be "TRUE" 4K output? I then feed the SDI output into the Teranex Mini SDI to HDMI for 3D lut management.

4K HDMI signal >>>> Teranex HDMI to SDI >>>>> Teranex SDI to HDMI for 3D lut management >>> LG 4K TV.

I am seeing sharpness falloff when I do that versus plugging in the HDMI directly into TV. Any thoughts? Does the HDMI to SDI convert it down then backup somehow? The box says UltraHD up conversion... which kind of worries me. Please help!

Thanks,

SDI to HDMI (with LUT or without) should not touch sharpness. You need to make sure your pipeline does keep UHD resolution- you may be getting just HD signal which your TV scales to its UHD panel.