In this paper, we introduce the world's first 8K 120-Hz video real-time encoder and decoder that complies with ARIB STD-B32~(1)). We evaluated the coding efficiency and demonstrated that 8K 120-Hz video and 22.2ch audio can be transmitted in real-time at a practical bitrate. NHK has been researching video coding with the aim of achieving full-featured 8K broadcasts, which represent the ultimate 2D TV. As part of this research, we have developed 8K video codecs using various encoding schemes2'"4', and demonstrated the feasibility of 8K broadcasts through live transmission of large-scale sports events and public viewings. On the basis of the technical knowledge we thereby gained~(5)6)), NHK started 8K broadcasting in December 2018.
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