DO
The BBC has been heavily involved in 8K development, it's been going on for well over a decade. Many broadcasting advances come from these shores.
Is there a reason why the Far East always seems to be years ahead of everyone when it comes to these broadcasting advances?
The BBC has been heavily involved in 8K development, it's been going on for well over a decade. Many broadcasting advances come from these shores.
IT
I agree, HDR and high frame rate are far more practical technologies in the normal home... At least you can see the difference in a domestic setting. 4 and 8k are impractical in a house
DV
Disagree with the 4K remark above having had it for 9 months the difference is astonishing. 8K will have to wait though uncompressed 8K is a whopping 190mbps compressing that down for service broadcast will be an order of magnitude more difficult than anything we've seen to date.
JA
Though I almost wonder why they'd bother with HFR when they're so obsessed with sticking a low frame rate "film look" on everything these days.
I agree, HDR and high frame rate are far more practical technologies in the normal home... At least you can see the difference in a domestic setting. 4 and 8k are impractical in a house
Though I almost wonder why they'd bother with HFR when they're so obsessed with sticking a low frame rate "film look" on everything these days.
NG
Where did you get the 190Mb/s figure from? The 190Mb/s is almost certainly a heavily compressed H264 or H265 signal...
Uncompressed 8K is huge orders of magnitude higher than that, after all uncompressed SD is ~190Mbs...
7680x4320 at 4:2:0 10 bit 60 fps would be : 7680x4320x60x15 = ~30Gb/s (30,000 Mb/s)
(The 15 is to handle 10 bit 4:2:0 where 1 10 bit Y sample is accompanied by 50% of a Cb or a Cr sample)
If you go for full-fat 4:4:4 120p then it's 7680x4320x120x30 = ~120Gb/s (120,000 Mb/s)
For comparison :
1920x1080 60i 4:2:0 8 bit would be ~750Mb/s
3840x2160 60p 4:2:0 8 bit would be ~6Gb/s (6000 Mb/s)
noggin
Founding member
Disagree with the 4K remark above having had it for 9 months the difference is astonishing. 8K will have to wait though uncompressed 8K is a whopping 190mbps compressing that down for service broadcast will be an order of magnitude more difficult than anything we've seen to date.
Where did you get the 190Mb/s figure from? The 190Mb/s is almost certainly a heavily compressed H264 or H265 signal...
Uncompressed 8K is huge orders of magnitude higher than that, after all uncompressed SD is ~190Mbs...
7680x4320 at 4:2:0 10 bit 60 fps would be : 7680x4320x60x15 = ~30Gb/s (30,000 Mb/s)
(The 15 is to handle 10 bit 4:2:0 where 1 10 bit Y sample is accompanied by 50% of a Cb or a Cr sample)
If you go for full-fat 4:4:4 120p then it's 7680x4320x120x30 = ~120Gb/s (120,000 Mb/s)
For comparison :
1920x1080 60i 4:2:0 8 bit would be ~750Mb/s
3840x2160 60p 4:2:0 8 bit would be ~6Gb/s (6000 Mb/s)
NG
A long time ago...
I saw live 8K pictures from London in Amsterdam about 7 or 8 years ago, along with a stunning showreel.. I saw live Swimming at London 2012 in 8K, along with opening ceremony highlights. Both were delivered over IP or from local playback.
NHK have use cutting edge modulation schemes to terrestrially broadcast 8K stuff, as well as via satellite (which is easier)
The stuff I saw was 7680x4320/59.94p (aka 60p) - I don't know if the Rio stuff is now HFR 120p (or the 1000/1001 equivalent)
noggin
Founding member
Japan has just done the world's first 8K TV broadcast.
A long time ago...
I saw live 8K pictures from London in Amsterdam about 7 or 8 years ago, along with a stunning showreel.. I saw live Swimming at London 2012 in 8K, along with opening ceremony highlights. Both were delivered over IP or from local playback.
NHK have use cutting edge modulation schemes to terrestrially broadcast 8K stuff, as well as via satellite (which is easier)
The stuff I saw was 7680x4320/59.94p (aka 60p) - I don't know if the Rio stuff is now HFR 120p (or the 1000/1001 equivalent)
Last edited by noggin on 10 August 2016 9:29am