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BROADCAST TECHNOLOGY NHK Science & Technology Research Laboratories ISSN 1345-4099 CONTENTS no.75 STRL Bulletin winter 2019 1 -Efforts by NHK to Promote International Standardiza- tion............................................................................................. 1 -Events Related to 4K/8K Satellite Broadcasting and 8K Home Viewing ......................................................................... 2 -Device Linking Technology for TV viewing .......................... 3 -R&D Trends in Video Streaming for TV .......................... 9 Topic Feature -Quantum Dot Light-emitting Diode for Displays with Vivid Color .......................................................................... 20 -Development of More Efficient Video Coding Technology .............................................................................................. 21 -Translation Assistant System for Sign Language CG from Japanese Text for Sports News ............................................ 22 -Exhibition of the Latest NHK Technology at IBC2018 ... 24 Journals.....23 From the Editors ..... 24 NHK Technology R&D Efforts by NHK to Promote International Standardization 1 All program production and broadcasting are based on audio, video, and trans- mission standards so that programming can be viewed with any TV receiver. The use of internationally recognized standards also facilitates program exchange and production collaboration by broadcast stations in different countries and reduces the cost of equipment. NHK is applying the results of research and development in stan- dardization activities and is working toward the standardization of broadcast tech- nology that can be used worldwide through participation in the International Tele- communication Union (ITU) and other organizations. ■ Video coding To implement the terrestrial broadcasting of SHV, we have been working on inter- national standardization of a high-compression video coding system. In addition to contributions to ITU, we have also been promoting standardization of the VVC *1 next-generation coding system at MPEG, *2 an organization responsible for standardization of multimedia coding systems. In addition to proposing and evaluating coding tech- nology for ultrahigh-definition video, we are also providing images for evaluation and contributing to standardization decisions. ■ Next-generation audio systems At ITU, we have been contributing to the establishment of standard specifications for audio metadata and audio file formats for implementing next-generation audio services of object-based audio *3 with the 22.2 multichannel sound system. At the Society of Motion Picture and Television Engineers (SMPTE), we have also been involved in standardizing a method to transmit audio metadata via the existing digital audio interface. ■ Integrated Broadcast-Broadband system and data services We are promoting international standardization of Hybridcast technology for an Integrated Broadcast-Broadband system and a system for providing data services by SHV broadcasting. We have been contributing to ITU standardization of the latest functions for integrating television and smartphones, functions for video playback for TV browsers, etc. We are also working on Hybridcast system for cable television. ■ Next-generation terrestrial broadcasting The satellite broadcasting of 4K/8K Super Hi-Vision (SHV) was launched on December 1st, 2018. The research interest is moving on to SHV services delivered by terrestrial broadcasting. Given the legacy features of the current terrestrial digital broad- casting system, NHK is investigating a new broadcasting system that can provide SHV broadcasting for fixed reception and Hi- Vision broadcasting for mobile reception on a single channel. NHK has been contributing technology for improving transmission characteristics and the results of transmission experiments to ITU and has been working toward international standardization of the next-generation broadcasting system. *1 VVC (Versatile Video Coding) is a next-generation coding scheme for which standardization is in progress. *2 MPEG (Moving Picture Experts Group) is a group that engages in standardization activities for ISO/IEC video and audio compression coding systems and transmission systems. *3 Object-based audio uses a rendering device that customizes program sound suited to viewer preferences and the reproduction environment by using audio metadata (combinations, positions, signal levels, etc. of sound source materials), which is added to sound source materials (“narration”, “background sound”, etc.). Video coding standardization meeting (October 2018)
