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) ?
