Development of New 4K/8K UHDTV Satellite Broadcasting System in Japan
Date & Time
Wednesday, October 23, 2019, 12:00 PM - 12:30 PM
In December 2018, 4K/8K Ultra-High-Definition TV (UHDTV) satellite broadcasts started in Japan, where the 8K UHDTV broadcasts are the first in the world. The 8K UHDTV system requires transmission channels with much larger capacity than the conventional 2K HDTV system.
For these reasons, we developed a new broadcasting system that employs 16APSK modulation scheme to achieve high-frequency efficiency and MMT protocol with high compatibility to IP and HEVC video coding with a high efficiency compression performance.
For the maximum use of the existing satellite TV frequency band, we newly employ left-handed circularly polarized (LHP) radio waves in addition to right-handed circularly polarized (RHP) radio waves that have been used for satellite broadcasts in Japan. For reception, new satellite reception antennas that enable the reception of LHP and RHP satellite radio waves are developed. The IF frequency band of the antenna of the Outdoor Unit (ODU) has been expanded from 2.1 GHz to 3.2 GHz.
Antenna component manufacturers produce many kinds of accessories, such as receiving antennas, boosters, multiway splitters, and F-connector outlets, that meet the performance required in the industry standard "SH marking system (Quality approval mark for Super Hi-vision(4K/8K) reception)”.Since the SH mark indicates that the products have the sufficient performance to receive 4K/8K UHDTV broadcasts stably with robustness to the interference caused by 2.4-GHz-band Wi-Fi, etc., the products also achieve low transmission loss in the expanded higher frequency band. An SH mark sticker on a product helps consumers to choose appropriate products for the reception of 4K/8K UHDTV satellite broadcasts.
The new broadcasting satellite BSAT-4a with 200-W-class TWTAs was launched on September 30, 2017 (Japan time).
These TWTAs are operated at an output back-off of 2.2 dB to fully exploit the performance of 16APSK.
For large-scale apartment complexes, there are cases where existing coaxial cables and RF boosters don’t have sufficient bandwidth for 4K/8K satellite UHDTV broadcasts to transfer satellite TV signals to each household from a shared dish antenna on the rooftop.
The replacement of such in-house equipment is hugely burdensome. Currently, some reasonably priced plastic-optical fibers and frequency converters are under development as new in-house transmitting equipment.
In this presentation, we introduce details of the technical aspects of the equipment and technical standards that support the new 4K/8K satellite UHDTV broadcast in Japan.
Technical Depth of Presentation
Basic to Intermediate.
What Attendees will Benefit Most from this Presentation
Engineers and technologists engaged in broadcasting technology.
Take-Aways from this Presentation
We will include an explanation of the manner of the standardization bodies ARIB and A-PAB in Japan, specification details, demonstration experiments, and cooperation with engineers of manufacturing companies in our presentation.