Open day in the ETSIT


On April the 5th the open day in the ETSIT-UPM took place. The Chair of RTVE and The Visual Telecommunication Application Group (G@TV) participated in this event with a demo to show the activities that they are carrying out in the field of Ultra High Definition (UHDTV).

Thanks to the temporary television broadcast license granted by the Secretary of State for Telecommunications and the professional equipment located in the roof of building D, a real transmission was possible. The standard used for broadcasting the signal was DVB-T2, an evolution of the DVB-T standard currently used for the DTT broadcast.

The parameters in the DVB-T2 transmission were: frequency 658 MHz, UHF channel 44, configuration with a single PLP, modulation 64QAM, mode 32K extended, guard interval 1/128, FEC 3/4 and pilot pattern PP7.

In the hall of the ETSIT UPM, a stand was placed with a 55-inch TV to receive the signal that was broadcasted in that moment. This signal was composed of two channels: the first one with 4K resolution (3840x2160 pixels), frame rate 50p and encoded with the HEVC standard at 25 Mbps, and the second channel with HD resolution (1280x720 pixels), frame rate 25p and encoded with the AVC standard at 4.5 Mbps. The audiovisual content of both channels comes from 4K sequences recorded by TVE in La Granja palace and in the Rastro street market.

Together with the two channels, the multiplexor integrated the neccesary signalling to allow the television set to show the RTVE HbbTV service through the Internet, and thus to play 4K audiovisual content using different bit rates. HbbTV is a Connected TV standard to play Internet content on the screen.

The Chair of RTVE in ETSIT-UPM is dedicated to the study and deployment of new audiovisual technologies such as UHDTV, DVB-T2, HEVC and HbbTV. UHDTV is not only more pixels but it also adds other important characteristics such as higher dynamic range, higher frame rate, wider color gamut and immersive audio.