Low-latency streaming techniques for transmission of animatable volumetric videos over next-generation mobile networks
Duration: March 2019 – present
Volumetric video contains considerably more data compared to traditional 2D video. Processing these data introduces challenges including: high bit rates, inefficient processing on end devices due to a lack of hardware decoders for volumetric data and high processing requirements for rendering multiple volumetric objects.
The hardware found in current mobile devices is inadequate for efficiently decoding and rendering volumetric video content. A workaround is to offload the processing to the cloud. Here, a view from the 3D object can be rendered into a 2D video. This 2D video can be compressed and transmitted to a user’s device. The rendered view is dynamically updated according to user interaction. Benefits include: leveraging the existing 2D video processing pipeline on mobile phones, enabling display of complex scenes on legacy devices, and achieving practicable bitrates for transmission of complex volumetric scenes. However, network latency brought by cloud-based rendering causes an increased interaction latency.
To reduce the effective interaction latency, we employ efficient hardware encoders, real-time streaming protocols such as WebRTC, (in addition to using low-latency 5G networks), and develop algorithms that can accurately predict the user’s 6DoF head movements.
- Fraunhofer HHI
- Deutsche Telekom AG
- Volucap GmbH
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