The camera housing is 10cm^2 and only weighs 2kg. The image sensor is 25mm diagonally, which is a touch smaller than S35. The signal is encoded using H.265 and they are planing to upgrade to 120fps. The real-time encoder compresses 30Gbps to 85Mbps at 350:1 and appears to require an entire rack of computer equipment! This is utterly amazing to me.
http://www.youtube.com/watch?v=XhLLjrkSroQ
http://www.diginfo.tv/v/13-0043-r-en.php
http://www.youtube.com/watch?v=XhLLjrkSroQ
http://www.diginfo.tv/v/13-0043-r-en.php
NHK is progressing with the development of equipment to enable to the broadcast of 8K Ultra High Definition television, with trial broadcasts to begin in Japan in 2016.
The camera head, co-developed with Astrodesign, has been made much lighter and more compact. They achieved this by packaging a 33-megapixel image sensor and its drive circuits in a housing just 10 cm square, with a total weight of around 2kg.