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NHK confirmed in Amsterdam that it will start the first 8K transmissions next year,with full trial broadcasts from 2018 and commercial service in 2020. The Rio Olympics have been a target for 8K for some time, but reports are that at least four major US sporting events will also be captured in 8K for NHK's Super HiVision broadcasts. With full commercial service in time for the Tokio Olympics in 2020.
Practical concerns are compression, as the raw signal(s) out of the camera amount to 74 gigabit/s, target is a more managable 100 MBit/s. Current 4K broadcasts on satellite often use 25 Mbit/s, so four times the datarate for four times the spatial resolution should be managable at the same quality. Though from an image quality perspective one would prefer 50 MBit/s. There is also a 3.5 second buffering time. Rapid zapping became a thing of the past with the move from analog to digital broadcasts, but this takes it to a whole new level, if no solution is found.
The BBC provided its HDR system, and teamed up with NHK for metadata free HDR broadcasts, in what is now called BBC NHK Hybrid Log-Gamma HDR. With a split in the EOTF (Electro Optical Transfer Function) curve, regular gamma correction for 0 to the current 100 nits (Candela per meter squared), and a logarithmic function for the expanded dynamic range. Perceptively 100 nits is half way towards 10000 nits, so the curve needs to cover twice the perveived light output, but in the electric signal 10000 is still 100 times 100. Hence the need for a logarithmic curve to ramp up quickly. Regular TVs will only use the bottom range, following the regular gamma curve, HDR sets will also use the top part of the range, following the log function in the Hybrid Log-Gamma system.
Textures are still visible in bright shiny surfaces, like the surf hitting the beach. Or wet rocks.
Dark images with large bright areas
Bright whites with dark greens, work:
Some sparkle:
Pixel peeping on the Sharp HDR 8K 85" LCD display:
Specifications:
Practical concerns are compression, as the raw signal(s) out of the camera amount to 74 gigabit/s, target is a more managable 100 MBit/s. Current 4K broadcasts on satellite often use 25 Mbit/s, so four times the datarate for four times the spatial resolution should be managable at the same quality. Though from an image quality perspective one would prefer 50 MBit/s. There is also a 3.5 second buffering time. Rapid zapping became a thing of the past with the move from analog to digital broadcasts, but this takes it to a whole new level, if no solution is found.
The BBC provided its HDR system, and teamed up with NHK for metadata free HDR broadcasts, in what is now called BBC NHK Hybrid Log-Gamma HDR. With a split in the EOTF (Electro Optical Transfer Function) curve, regular gamma correction for 0 to the current 100 nits (Candela per meter squared), and a logarithmic function for the expanded dynamic range. Perceptively 100 nits is half way towards 10000 nits, so the curve needs to cover twice the perveived light output, but in the electric signal 10000 is still 100 times 100. Hence the need for a logarithmic curve to ramp up quickly. Regular TVs will only use the bottom range, following the regular gamma curve, HDR sets will also use the top part of the range, following the log function in the Hybrid Log-Gamma system.
Textures are still visible in bright shiny surfaces, like the surf hitting the beach. Or wet rocks.
Dark images with large bright areas
Bright whites with dark greens, work:
Some sparkle:
Pixel peeping on the Sharp HDR 8K 85" LCD display:
Specifications: