BBC iPlayer is launching Blue Planet II in UHD and HDR.
The seven-part series, available from 10th December, will mark the first time iPlayer has delivered content in such high quality.
Narrated by Sir David Attenborough, the documentary series uses “revolutionary cameras techniques and technology to capture breath-taking oceans around the world”.
Matthew Postgate, chief technology and product officer, BBC Design and Engineering, said: “[This move] perfectly demonstrates how the BBC is pushing the boundaries of digital innovation. This is the next step in reinventing the BBC for a new generation, and there’s not a better place to start than with the stunning Blue Planet II.”
The BBC uses its own type of HDR - Hybrid Log-Gamma (HLG), invented by BBC R&D in conjunction with Japanese broadcaster NHK.
A BBC statement said: “Due to the way HLG represents light, people can enjoy the most natural colours possible on their televisions at home, as if they were in the sea alongside the camera crew. It’s also is a significant step toward bringing more HDR programmes to more people, as it meets the complex needs of TV broadcasters, especially with live broadcasts.”