Stereoscopic Interleaved Compression for Wireless VR Bandwidth
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Solution Overview
Problem
Wireless VR video streaming faces challenges in compressing high-resolution, high-frame-rate content for transmission over low-bandwidth wireless links without significantly reducing video quality, due to varying link quality and environmental obstructions.
Innovation Solution
Implementing a stereoscopic interleaved compression technique where each pair of frames has one half encoded with less compression and the other half with more compression, and periodically dropping or replacing half-frames to reduce bandwidth requirements, while using beamforming and directional transmission to enhance link quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wireless VR video streaming uses high resolution and high frame-rate, then video quality is improved, but bandwidth requirements increase
Solution Approach 1:
The patent divides video frames into two separate frames: a first frame containing a first half-frame and a second frame containing a second half-frame. This segmentation allows the system to transmit only essential visual information in each frame while maintaining the perception of high-resolution video through the interleaved display pattern, thereby reducing bandwidth requirements while preserving video quality.
Solution Approach 2:
The patent implements periodic transmission of alternating half-frames by sending the first half-frame in one frame and the second half-frame in the next frame, creating a periodic pattern that leverages human visual system processing. This periodic action reduces the amount of data transmitted per unit time while maintaining perceived video quality.
2Quantity of substance
If compression is applied to reduce bandwidth, then bandwidth requirements are reduced, but video quality deteriorates
Solution Approach 1:
The patent applies partial compression by transmitting only half of each frame at a time in an interleaved pattern between two frames. This partial action approach reduces the compression ratio required for each individual half-frame while maintaining overall video quality, as the human visual system integrates the alternating half-frames to perceive complete high-resolution images.
3Measurement precision
If cable connection is used between computer and HMD, then video quality is maintained, but user movement is restricted
Solution Approach 1:
The patent replaces the mechanical cable connection system with a wireless transmission system that uses optimized video compression techniques. By implementing the interleaved half-frame transmission method, the system achieves efficient bandwidth utilization that maintains video quality over wireless links, thereby eliminating physical cables and enabling unrestricted user movement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces bandwidth needs by half, maintaining video quality by leveraging human visual system processing and improving communication range through optimized antenna settings and beamforming, allowing for more immersive and versatile VR applications.
Implementation Method 1
using beamforming and directional transmission to enhance link quality
Data Source
AI summary
Systems, apparatuses, and methods for implementing stereoscopic interleaved compression techniques are disclosed. A system includes a transmitter sending a video stream over a wireless link to a receiver. For each pair of frames, the transmitter encodes a left-half of a first frame of the pair with an amount of compression less than a first threshold and encodes a right-half of the first frame with an amount of compression greater than a second threshold. For a second frame of the pair, the transmitter encodes a right-half of the second frame with an amount of compression less than the first threshold and encodes a left-half of the second frame with an amount of compression greater than the second threshold. The transmitter conveys encoded half-frames and indications of an amount of compression used for each half-frame to a receiver. The receiver receives, decodes, and drives the encoded half-frames to a display.