Adaptive Wireless Display Rate Control via Channel Monitoring
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Solution Overview
Problem
Existing wireless display systems face video quality deterioration due to adverse channel conditions caused by interference and noise, as they use static video encoding rates regardless of channel conditions, leading to increased packet loss and retransmissions.
Innovation Solution
Implementing an adaptive data transmission rate control mechanism using a Channel Monitor Tool (CMT) to adjust video encoding rates based on the current data transmission capacity of the wireless channel, ensuring the encoding rate remains within the channel's capacity, thereby maintaining video quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static video encoding rate is used, then device complexity is reduced, but video quality deteriorates under adverse channel conditions
Solution Approach 1:
The patent implements dynamic adaptation of video encoding parameters based on real-time channel conditions. The system continuously monitors channel quality metrics and adjusts encoding rate, resolution, and format dynamically to match current transmission conditions, resolving the contradiction between static simplicity and dynamic reliability.
Solution Approach 2:
The system employs feedback mechanisms where channel condition information is continuously monitored and fed back to the encoding module. This closed-loop control allows the encoder to adjust its parameters based on actual transmission conditions, maintaining video quality without requiring overly complex predetermined control mechanisms.
2Reliability
If higher video resolution is transmitted, then video quality is improved, but packet loss increases under poor channel conditions
Solution Approach 1:
The patent dynamically changes encoding parameters including resolution, bitrate, and format based on channel conditions. When channel quality degrades, the system automatically reduces resolution and adjusts bitrate to prevent packet loss, while maintaining acceptable video quality. This resolves the contradiction by making resolution adaptive rather than fixed.
Solution Approach 2:
The system transitions from static high-resolution transmission to dynamic resolution adjustment. The encoding resolution is continuously adapted based on real-time channel condition assessment, allowing the system to maintain high quality when conditions permit while preventing packet loss when conditions deteriorate.
3Reliability
If adaptive encoding is implemented, then video quality is maintained under varying conditions, but device complexity increases
Solution Approach 1:
The patent uses feedback from channel condition monitoring to control encoding parameters. This feedback-driven approach maintains video quality under varying conditions while avoiding the need for overly complex predetermined control mechanisms, as the system responds automatically to actual conditions.
Solution Approach 2:
The system performs self-adjustment of encoding parameters based on its own monitoring of channel conditions. The adaptive encoding module automatically modifies its output based on real-time feedback without requiring external control, reducing the complexity burden while maintaining quality.
4Productivity
If video encoding rate is increased, then transmission speed is improved, but packet loss increases under adverse channel conditions
Solution Approach 1:
The patent dynamically adjusts the encoding bitrate based on channel conditions. When channel quality is good, higher transmission rates are used to maximize productivity. When conditions deteriorate, the bitrate is reduced to prevent packet loss, resolving the contradiction between transmission speed and delivery reliability.
Solution Approach 2:
The system transitions from fixed encoding rate to dynamic rate adjustment. The encoding rate is continuously adapted to match channel capacity, allowing the system to achieve high transmission speeds when conditions permit while maintaining packet delivery success when conditions are adverse.
Data Source
AI summary
A method, a computer readable medium and an apparatus to adaptively control a data transmission rate of a wireless display device. The method includes determining a current data transmission rate capacity of a wireless channel; and controlling a data transmission rate of a wireless transmission device based on the current data transmission rate capacity.