Japan's national public broadcaster NHK has revealed that it successfully broadcast a compressed Super Hi-Vision (SHV) signal carrying video at a resolution of 7680 x 4320, 16 times the resolution of regular HD. This is the first time that SHV has been transmitted over the air.
On April 15, NHK successfully broadcast the video via two channels of ultra-high frequency radio from the roof of its Science and Technology Research Laboratories. It was decoded at a distance of 4.2 km (2.6 miles) without error.
Japan's AV Watch reports that, across the two channels used (UHF31 and UHF34), a data transmission bandwidth of 183.6 Mbps was achieved.
Super Hi-Vision is NHK's preferred name for ultra high definition television (UHDTV) at this definition, also known as 8K (or 8K4K). It was one of two UHDTV standards defined by the Society of Motion Picture & Television Engineers in 2007, the other being the lesser 4K (or 4K2K) standard with a resolution of 3840 x 2160, as seen in UHDTVs by Samsung and Toshiba, as well as JVC's 4K2K camera. (JVC's D-ILA projector also discussed at the time supports 8K.) A frame rate of 120 frames per second for both UHDTV standards was subsequently agreed.