Dynamic Compression Controller for Wireless Multimedia Streaming
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Solution Overview
Problem
Media streaming systems, such as virtual reality systems, often compromise either the mobility of headset devices or the available bandwidth, as they struggle to provide the necessary bandwidth for high-quality video streaming while maintaining mobility.
Innovation Solution
A host computing device with a processor, compression/decompression device, and wireless communications assembly that dynamically selects between uncompressed and compressed multimedia data for transmission to a client device based on link quality conditions, using a controller to adjust compression levels according to the number of connected client devices and signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If uncompressed multimedia data is transmitted to ensure high video quality, then video quality is improved, but bandwidth consumption increases
Solution Approach 1:
The system dynamically adjusts compression levels based on real-time link quality conditions. When link quality is high, uncompressed or lightly compressed data is transmitted to maintain video quality. When link quality degrades, compression is increased to maintain mobility and connection stability, resolving the contradiction between video quality and bandwidth consumption adaptively
Solution Approach 2:
The controller changes the compression parameter of multimedia data based on link quality metrics. By adjusting the compression parameter dynamically, the system can transmit high-quality video when bandwidth is available while reducing bandwidth consumption when link conditions deteriorate, thus resolving the technical contradiction
2Quantity of substance
If compression is applied to reduce bandwidth consumption, then bandwidth efficiency is improved, but video quality deteriorates
Solution Approach 1:
Rather than applying fixed compression, the system uses dynamic compression adjustment based on link quality. This allows the system to maintain high video quality when bandwidth permits while improving bandwidth efficiency when link conditions require it, resolving the contradiction between video quality and bandwidth efficiency
Solution Approach 2:
The system incorporates feedback from link quality monitoring to adjust compression levels. When link quality is good, feedback signals allow for lower compression and higher video quality. When link quality deteriorates, feedback triggers increased compression to maintain connection, thus resolving the trade-off between video quality and bandwidth efficiency
3Measurement precision
If high bandwidth is allocated for video streaming, then video quality is maintained, but mobility of client devices is compromised
Solution Approach 1:
The system dynamically adapts compression levels based on real-time link quality, enabling client devices to move freely without requiring dedicated high-bandwidth infrastructure. When devices are stationary with good links, quality is maintained. When devices move or links degrade, compression adjusts to maintain connectivity, thus preserving mobility while maintaining video quality when possible
4Productivity
If compression levels are increased to support more connected devices, then system capacity is improved, but video quality for individual devices may deteriorate
Solution Approach 1:
The controller applies different compression levels to different client devices based on their individual link quality conditions. This allows the system to support multiple devices simultaneously with varying compression ratios, maintaining video quality for devices with good links while using higher compression for devices experiencing poorer conditions, thus improving system capacity without uniformly sacrificing video quality
Data Source
AI summary
A host computing device for a multimedia system includes: a processor configured to generate multimedia data for transmission to a client device; a compression/decompression device connected to the processor, the compression/decompression device configured to receive the multimedia data and generated compressed multimedia data; a communications assembly connected to the processor and including (i) a wireless transceiver and (ii) a controller configured to receive the multimedia data from the processor and the compressed multimedia data from the compression/decompression device; the controller further configured to select one of the multimedia data and the compressed multimedia data for transmission to the client device via the wireless transceiver.