>From what I understand, these symbols are from Japanese Broadcasting Standard and I do see Japanese government use 4K in their official documents which probably explained the naming. https://www.google.co.jp/search?q=4k+site%3A.go.jp&oq=4k+site%3A.go.jp 2016/06/22 18:37 "Philippe Verdy" <[email protected]>:
> > > 2016-06-22 0:02 GMT+02:00 <[email protected]>: > >> Important symbol additions include: >> >> - 19 symbols for the new 4K TV standard >> >> We were told that this standad is not named "4K" but "UltraHD" (UHD)... > "4K" is just a popular informal term in English medias, or used in > commercial announcements, here also in English. It is not correctly > understood everywhere, or would lead to confusion about the required > conformance level > > [Basically, this does not just include a minimum resolution but also a set > of encoding technologies, support for encryption, support for several > protocols -- including support for UTF-8 as this standard is now based on > web standards -- and no longer requires the MPEG envelope, but will rather > use streaming over IP. For broadcasting, it also includes a new signal > format requiring a new hardware tuner and demultiplexer and channels will > transport more than just audio and videos, and will also have dynmically > changing parameters (resolution, color planes, supplementary planes for > stereoscopic 3D, supplentary streams for 5.1 sound, possibility of reducing > the bandwidth usage dynamically for some programs, so that channel > producers can negociate their mutual bandwidth need on the multiplex > support, and add/remove supplementary streams, including for advertzing, or > for renewing usage rights to the authorized subscribers with conforming > devices... All this is also supported on the new DVB-T2 standard for > broadcasting, but the format is designed to be transportable as well over > various networking media, including fiber, DSL, mobile internet, or relayed > over VLANs. For "4K" resolution, the requirement on devices is not just on > the tuner or demuxer, but also in terms of minimum performance level for > the codec which will also support secondary streams for error corrections, > possibly via other connections, such as correcting a received broadcast > using a separate Internet access, which may also be used to negociate and > renew decryption keys for paid programs.] > > The UltraHD logo (for use on sold products) is set accordingly (and > already there's another DVB-T2 logo for hardware decoders that are still > not ready for UltraHD, but may be eligible later via firmware updates, > because existing DVB-T tuners will not be able to decode the signal even if > they support the necessary codecs and are able to display the 4K > resolution). For cable decoders or "boxes" propsoed by ISP, there are > separate specifications, but they are controled by the ISP. However they > will support the UltraHD streams and will implement the necessary virtual > networking interfaces in their router. For mobile devices, this will > support as long as you have the support for the 4G/5G network, the rest > will be a driver update or will be supported by installable apps, but the > rendering capabilities will be limited by the GPU and screen hardware. > > Anyway, aren't all these logos (not "4K", but "UltraHD" and > "DVB-T"/"DVB-T2") protected by IP rights (with specific rules about their > conforming usage, and a design for the shapes) ? > >
