The Ultra-High-Definition Television (UHDTV) has a spatial resolution four to nine times higher than that of the High-Definition TV(HDTV), reaching 3840x2160 pixels. This remarkable increase in resolution, together with the image dynamic-range enhancement systems, refresh rates up to 120 frames per second, wider range of colors and surround sound, make the UHDTV a completely new user experience.
The addition of all these new features sees a significant increase in the demand for bandwidth needed to carry the signal from the production center to the end users. That is why the UHDTV must come hand in hand with a number of new technologies that significantly improve the efficiency of coding systems, transportation and distribution.
The video encoding is based on the new H.265/HEVC standard (High Efficiency Video Coding), that in the short and medium term is meant to replace the H.264/AVC system, the most widely used today. This new video encoding system, the H.265/HEVC, is a significant improvement compared to the H.264/AVC system, allowing for video encoding of same quality but using only half of the bandwidth. In other words, it requires only half of the storage space.
The dynamic content distribution is based on the MPEG-DASH standard (Dynamic Adaptive Streaming over HTTP), which provides the user with different levels of quality of the same content, while automatically and transparently adapting in order to ensure the best end-user experience, depending on the quality of the available connection at any given moment.
Within the scope of the project there are measures of objective quality and subjective tests currently undertaken in order to evaluate the increase in quality that Ultra HD brings to the user, as well as to quantify the performance of the new technologies involved in this project.
A workshop will take place on the 26th of November 2015 in the Conference Room of the Escuela Técnica Superior de Ingenieros de Telecomunicación de Madrid (UPM), a workshop in which we will present the project's main objectives as well as the developments that have already been made. The event will feature some of the major players of the audiovisual sector. Moreover there will be two demos on display of the developed platform.
The PLEASE project is led by Retevisión (Cellnex Telecom group), with the participation of CIRES21, SAPEC and the G@TV group of the Polytechnic University of Madrid. The project's time frame expands over a period of 18 months and counts with the support and funding coming from the Ministry of Industry, Energy and Tourism. For more information please check the official website of the project: www.gatv.ssr.upm.es/please.