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4k TV Question
- Thread starter milan188
- Start date
agentrfr
Executive Member
Not necessarily.
The panel is just a display system. A 4k panel can display 4k images (standard is 2160p, or 3840x2160) at whatever the rated refresh rate is. HDMI is the display adapter - the medium of information transfer between the codec and the panel controller. 10-bit referes to the colour depth (i.e. 2^10 possible colours per pixel, for a total maximum of 1024 colours per each individual pixel).
Now for the fun part: HEVC, or what you are most likely referring to at this point in time is the H.265 codec standard. That is how a video/image/sound package file can be decoded into displayable image(s) and playable sound(s). H.265 is quite advanced in that it makes provision for many different colour depths, resolutions, refresh rates, audio sources as well as metadata (such as subtitles and other info). HDMI 2.0 has been designed to display 4k at 60 fps with a colour depth of 48 bits.
However, actually running H.265 requires quite a lot of horsepower, and I doubt you'll see that kind of native processing capability in a TV any time soon.
So long as the panel you buy can do 4k at 60 fps with at (personal opinion) least 32-bit depth, you should be okay (most panels these days do 32-bit depth). You're going to need to buy a dedicated media PC to be able to generate that kind of quality images at a half decent frame rate through...
As a side note for interest, 4k blu-ray videos are encoded at only 10-bit...
The panel is just a display system. A 4k panel can display 4k images (standard is 2160p, or 3840x2160) at whatever the rated refresh rate is. HDMI is the display adapter - the medium of information transfer between the codec and the panel controller. 10-bit referes to the colour depth (i.e. 2^10 possible colours per pixel, for a total maximum of 1024 colours per each individual pixel).
Now for the fun part: HEVC, or what you are most likely referring to at this point in time is the H.265 codec standard. That is how a video/image/sound package file can be decoded into displayable image(s) and playable sound(s). H.265 is quite advanced in that it makes provision for many different colour depths, resolutions, refresh rates, audio sources as well as metadata (such as subtitles and other info). HDMI 2.0 has been designed to display 4k at 60 fps with a colour depth of 48 bits.
However, actually running H.265 requires quite a lot of horsepower, and I doubt you'll see that kind of native processing capability in a TV any time soon.
So long as the panel you buy can do 4k at 60 fps with at (personal opinion) least 32-bit depth, you should be okay (most panels these days do 32-bit depth). You're going to need to buy a dedicated media PC to be able to generate that kind of quality images at a half decent frame rate through...
As a side note for interest, 4k blu-ray videos are encoded at only 10-bit...
I see thanks for the thorough reply... Some 4k tvs have an 8bit chip and it won't be compatible with the future 4k standard.
So what do you think about the lg 65ub950t.. It has HEVC will it be able 4k blu ray dvds? Is it a good buy?
http://m.lg.com/za/tvs/lg-65UB950T
So what do you think about the lg 65ub950t.. It has HEVC will it be able 4k blu ray dvds? Is it a good buy?
http://m.lg.com/za/tvs/lg-65UB950T
agentrfr
Executive Member
That is an IPS panel with 24 bit depth on each pixel at 60 fps. Yes, the picture it displays should blow your mind.
The TV supports H.265, which means that if you plug a flash drive into it with an H.265 file on it, then the TV has the codec ability to play it. WARNING: I doubt very much that it can play a 4k60p file on it. Most beefy HTPCs will have an issue with that. You will need a dedicated HTPC to play 4k content at 60fps.
The 4k blu ray will require a new blu ray player, which should be able to push 10 bit content at 4k 60fps to the panel. The panel doesn't care: it gets told what do do through the HDMI. The panel doesn't need to be H.265 compatible in this case. The fact that it is H.265 means specifically the TV can do the decoding of the file its self, rather than being told what to display by another device (HTPC, blu ray player or satellite decoder).
Be careful though: Being a IPS panel, there will be noticeable lag in what the panel displays: normally around 200ms. This is fine for watching videos (so long as you synch the audio), but if you are trying to play games (Xbox One or w/e) or plug it into a proper gaming PC to play games, you will have an awful time.
IPS panels are also significantly more expensive than "normal" TN panels (which have much narrower viewing angles, less ability to display black but have response times of around 2ms). For anything other than playing games, it is a good idea to pay the premium for an IPS panel.
To be honest, I'd wait another 6 months at least before buying a 4k panel. There is hardly any content available yet, and the first generations are always waaaaay overpriced (to pay for all the research and dev that went into them). Better idea Christmas next year.
Hope it helps
Last edited:
Arthur
Honorary Master
Thanks, agentrfr. Learnt something new from you. Much appreciated.
I just went ahead and got this tv. TV has a feature to delay sound if its a problem. It has a gaming profile and if you turn all the picture processing off you can significantly reduce the ms...however the tv wont be used for gaming so not an issue.
Overall very happy with this tv.
Overall very happy with this tv.