Wireless Video Packetization Protocol for Low Latency VR Streaming
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless VR video streaming faces challenges with low latency and video quality due to deteriorating link conditions, leading to a poor user experience.
Innovation Solution
Implementing real-time and low latency packetization protocols with a codec and MAC layer unit feedback loop to adjust compression settings based on available bandwidth, using modulation coding schemes (MCS) and beamforming technology to maintain video quality over high-frequency wireless links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If video data is transmitted wirelessly without buffering to maintain low latency, then responsiveness to user head movements is improved, but video quality deteriorates when link conditions deteriorate
Solution Approach 1:
The system dynamically adjusts the packetization protocol parameters, compression settings, and modulation coding scheme (MCS) level based on real-time link quality feedback. The MAC layer monitors link conditions and sends feedback to the codec, which adjusts compression settings accordingly, enabling the system to adapt to changing wireless conditions while maintaining low latency
Solution Approach 2:
The system changes multiple parameters including packetization protocol, compression ratio, and MCS level in response to link quality variations. When link quality deteriorates, the system increases compression and adjusts packetization to maintain video quality without introducing buffering delays
2Reliability
If compression settings are adjusted dynamically based on link quality, then video quality is maintained under varying conditions, but system complexity increases
Solution Approach 1:
A feedback loop is established where the MAC layer monitors link quality and sends feedback to the codec, which adjusts compression settings. This closed-loop control enables automatic adaptation to link conditions without complex manual configuration or higher-level control systems
Solution Approach 2:
The MAC layer performs multiple functions including link quality monitoring, feedback generation, and coordination with the codec for compression adjustment. This multi-functionality reduces the need for separate dedicated components for each function, thereby managing system complexity
Data Source
AI summary
Systems, apparatuses, and methods for implementing real-time, low-latency packetization protocols for live compressed video data are disclosed. A wireless transmitter includes at least a codec and a media access control (MAC) layer unit. In order for the codec to communicate with the MAC layer unit, the codec encodes the compression ratio in a header embedded inside the encoded video stream. The MAC layer unit extracts the compression ratio from the header and determines a modulation coding scheme (MCS) for transferring the video stream based on the compression ratio. The MAC layer unit and the codec also implement a feedback loop such that the MAC layer unit can command the codec to adjust the compression ratio. Since the changes to the video might not be implemented immediately, the MAC layer unit relies on the header to determine when the video data is coming in with the requested compression ratio.