Beijing 2022: UHD/HDR, Immersive Audio Make Leap to Winter Games By Ken Kerschbaumer, Editorial Director
Tuesday, February 8, 2022 - 1:04 pm
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OBS and the Beijing 2022 Winter Games are all in when it comes to UHD/HDR and immersive sound as all the sports sessions, the Opening and Closing Ceremonies and the Medals Plaza Victory Ceremonies will be natively produced in UHD HDR, with immersive audio.
Delivering UHD HDR content requires customized production units and workflows. Overall, OBS is using 15 Outside Broadcast (OB) vans, together with nine field datacenter production units, a fly-away system and a virtualized OB van all that have been specifically configured and fitted-out to meet OBS's new production and distribution requirements.
A first this year for an Olympic Winter Games is that OBS is capturing the sounds of the Games through an immersive 5.1.4 audio set-up that enables viewers to have a more realistic audio experience, with sound appearing to come from every direction - even from above.
Isidoro Moreno, OBS, head of engineering
OBS is expanding upon 5.1 surround sound by adding an overhead sound layer, and thus a third audio dimension with the addition of four hanging ceiling microphones with heights that will be adjustable. Two new microphones were specifically designed for this immersive sound production. In total, OBS will be using more than 1,600 microphones (40 different models).
Two immersive audio quality control rooms installed inside the IBC will support the venue production and guarantee quality consistency across all sports.
Isidoro Moreno, OBS, head of engineering, says all RHBs will receive the output in HD 1080i SDR as per Olympic standards.
OBS has created a single HDR to SDR production workflow model that will allow the trucks to generate an HD 1080i output via high-quality conversion from the primary UHD HDR signal, he explains. Almost all of the content will be produced natively in UHD HDR; however, OBS will also rely on several specialty cameras that at this time can only operate in HD 1080p SDR.
The video source of those cameras is being up-converted to UHD HDR in order to be seamlessly integrated into the main production so that there are no perceived color brightness differences.
A full Internet Protocol (IP) infrastructure has been built to support the transport of the UHD HDR signals for the contribution network, he adds. The OBS Venue Technical Operations (VTO) team has developed a set of look-up tables (LUT) in-house to maximize the quality between all cross-conversions from/to UHD-HD and HDR-SDR.
For Beijing, the SMPTE 292 standard is used for the production of the 1080i/50 HD-SDI signal as OBS will follow the 50 Hz specification. RHBs can also receive the international signal in UHD HDR. The UHD production will adhere to the SMPTE 2036-1 standard and follow the 50 Hz specification. The HDR standard will be Hybrid-Log Gamma
(HLG) while the 5.1.4 audio configuration will be provided for both standards.
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Beijing 2022: UHD/HDR, Immersive Audio Make Leap to Winter Games By Ken Kerschbaumer, Editorial Director 
