About CCTV-8K

CCTV-8K

CCTV-8K is the ultra-high-definition television channel of China Central Television, operated from Beijing by China Media Group. It was created to broadcast major national events, sport, documentary and drama in 8K ultra-high definition, a picture format with a resolution of 7680 by 4320 pixels — four times the pixel count of 4K and sixteen times that of mainstream high-definition video. The channel grew out of China's national push, in the years before the Beijing 2022 Winter Olympic Games, to build a complete 8K industry chain covering production, transmission, reception and public display. Trial broadcasting began on 1 February 2021, and China Media Group formally launched CCTV-8K in December 2021, ahead of the Winter Olympics it had been built to serve. The channel is carried for cable and IPTV distribution in mainland China and is listed alongside CCTV-4K in China Media Group's channel family, sharing the CCTV corporate website at tv.cctv.com.

The road to an 8K channel

CCTV-8K did not appear in isolation. It was the broadcasting centrepiece of a wider Chinese ultra-high-definition video strategy in which ministries, regulators and the national broadcaster worked to move the country's television industry beyond high definition. Industry reporting from the period describes a national programme, set out in the radio and television technology iteration plans for 2020 to 2022, to accelerate the development of high-definition and ultra-high-definition video alongside 5G high-tech video. Within that strategy, the Beijing Winter Olympics of February 2022 served as the fixed deadline and the public showcase: China Media Group committed itself to producing and broadcasting the Games in 8K, under the banner of a technology-driven Winter Olympics, and built the channel as the permanent home for that capability once the Games were over.

The February 2021 trial broadcast

The channel's public life began on 1 February 2021, when a launch ceremony in Beijing marked the start of CCTV's 8K ultra-high-definition channel trial broadcasts. CCTV reported the trial as the world's first realisation of 8K ultra-high-definition live television broadcasting and 8K television broadcasting over a 5G network. The test signals were broadcast over a 5G network with the support of China Mobile, China Telecom, China Unicom and China Radio and Television, and the pictures originated from venues including the National Grand Theatre in Beijing and sites in Shanghai. More than 30 outdoor ultra-high-definition public screens, together with China's first consignment of 8K television sets, carried the images in nine cities, among them Shanghai, Guangzhou, Shenzhen, Chengdu, Hangzhou, Jinan, Haikou and Qingdao. The trial was explicitly aimed at the Spring Festival period: CCTV intended its 8K channel to carry the Chinese New Year celebrations, including the Spring Festival Gala, as a demonstration of the format.

Technology behind the picture

Broadcasting in 8K placed unusual demands on every link of the television chain, and the trial was as much an engineering exercise as a programme launch. Industry supplier Telestream, whose equipment supported the test, described CCTV using a full SMPTE ST 2110 IP solution, including its Inspect 2110 monitoring system, PRISM waveform monitors and signal generation equipment, to monitor 8K IP signals in real time around the clock. CCTV required 8K streams to be transmitted at bit rates of 80 to 120 megabits per second — far beyond what ordinary high-definition broadcasting uses — which is why the project was bound so closely to 5G networks and to China's first generation of 5G-plus-8K outside broadcast vehicles. The point of the exercise was to prove that the whole process, from content production through editing to broadcasting, could be standardised for 8K, so that the channel could operate as a regular service rather than a one-off demonstration.

The public service 8K platform

On 7 May 2021, China Media Group formally kicked off a public service 8K ultra-high-definition television platform in Beijing, at an event attended by CMG president and editor-in-chief Shen Haixiong alongside other stakeholders, and followed by the Beijing International Television Technology Conference hosted by CCTV. CMG said it would work with a range of partners to build the platform, bring 8K television channels into more homes, and establish a comprehensive transmission mechanism using the content, platforms, channels and services already available. From June 2021, 8K deployment was to proceed on an increasingly broad scale, with CMG using the technology to produce and air reports on major events through the year, leading to the official launch of the 8K channel in December.

Hundreds of cities, thousands of screens

Because very few households yet owned 8K televisions, much of CCTV-8K's early audience was expected to watch in public. In October 2021, six authorities — the Ministry of Industry and Information Technology, the Central Propaganda Department, the Ministry of Transportation, the Ministry of Culture and Tourism, the National Radio and Television Administration and China Media Group — jointly issued a notice launching the "100 Cities and 1,000 Screens" ultra-high-definition video promotion activity, under the theme of lighting up a hundred cities and a thousand screens. The campaign supported cities in installing ultra-high-definition public screens to show high-quality 4K and 8K content and present Chinese culture. In January 2022 the six departments issued an implementation guide to speed up the demonstration projects and raise the construction and utilisation rates of the outdoor screens. When CCTV-8K was launched, the project to install big screens in public places was launched alongside it; four stations on the high-speed railway linking Beijing with the co-host city of Zhangjiakou were equipped with 8K screens carrying CMG content.

Launch and the Beijing Winter Olympics

China Media Group launched CCTV-8K in December 2021, with the stated purpose of broadcasting the 2022 Beijing Winter Olympics to audiences in ultra-high definition. CMG said that, to present Beijing 2022 in 8K, it had advanced construction of the relevant production and broadcasting system and accelerated growth of the whole industrial chain covering 8K television production, broadcasting and transmission. The channel therefore arrived as a permanent service rather than a Games-only pop-up: the Olympics were its proving ground and its first great subject, but the production system, the public-screen network and the distribution arrangements built for the Games were designed to remain in place afterwards, carrying other major events and programming in the format.

Programming

CCTV-8K's schedule is built from the kinds of pictures that justify the format. Channel listings describe it broadcasting selected major-event coverage, documentaries and drama in 8K for cable and IPTV audiences in mainland China. Its trial period was defined by ceremonial and festive broadcasting — the Spring Festival celebrations and gala coverage — and its launch purpose was live sport at the highest technical standard. Documentary material, with its emphasis on landscape and detail, and prestige drama form the natural complement to event coverage in a format whose selling point is visual fidelity. As CMG's designated 8K outlet, the channel also functions as the television endpoint of the group's wider ultra-high-definition production effort, receiving programmes originated in 8K across the organisation.

Distribution and place in the CCTV family

CCTV-8K sits within the channel portfolio of China Central Television, the television arm of China Media Group, based in Beijing. Where CCTV-4K serves viewers with 4K sets, CCTV-8K addresses the smaller but growing installed base of 8K receivers, together with the public-screen network built under the 100 Cities and 1,000 Screens campaign. Its distribution is through cable and IPTV systems in mainland China rather than free-to-air terrestrial broadcasting, and its public presence runs through the shared CCTV website, tv.cctv.com, where it is listed among CMG's channels. That position — a specialist, technology-led channel inside a generalist national broadcaster — mirrors the role of ultra-high-definition services launched by public broadcasters elsewhere, but on a characteristically larger, state-coordinated scale.

Significance

CCTV-8K matters less for the size of its everyday audience than for what it demonstrated and set in motion. Its February 2021 trial was presented by its operator as a world first — live 8K television carried over 5G — and its launch tied together broadcaster, telecom operators, regulators and display manufacturers in a single national project. The channel gave China a working end-to-end 8K system, from outside broadcast trucks to living-room sets and railway-station screens, and it remains the flagship proof of that system: the place where China Media Group's biggest events can be seen at the highest resolution Chinese television offers.