Video Telephony Codec Adaptation via Radio Signal Strength
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Solution Overview
Problem
Current Video Telephony (VT) systems using the 3G-324M protocol in mobile communication networks face issues with poor video/audio quality due to insufficient bandwidth allocation, ineffective use of bandwidth, and lack of consideration for network status, leading to degraded connection success rates and quality.
Innovation Solution
An apparatus and method that utilize meta-data based on radio signal strength to dynamically select and reconfigure audio/video codecs during the VT process, optimizing codec usage based on network conditions to improve VT quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed bandwidth of 48 kbps is allocated for video transmission, then the protocol structure is simple and stable, but the video quality is insufficient and bandwidth utilization is ineffective
Solution Approach 1:
The patent implements dynamic codec selection and reconfiguration based on radio signal strength. The system transitions from static fixed bandwidth allocation to dynamic adaptation, where codecs are selected and reconfigured in real-time according to network conditions, enabling both protocol stability and improved video quality
Solution Approach 2:
The patent changes the parameter of codec configuration from fixed to variable. By monitoring radio signal strength and adjusting codec parameters dynamically, the system optimizes video quality within the fixed 48 kbps bandwidth constraint, transforming a static parameter into a dynamically optimized one
2Ease of operation
If audio/video codecs are always selected according to priority, then the protocol operation is simple and stable, but the codec selection cannot adapt to network status changes
Solution Approach 1:
The patent introduces feedback mechanisms where radio signal strength is continuously monitored and fed back to the codec selection process. This feedback loop enables the system to adapt codec selection to current network conditions while maintaining relatively simple protocol operations through automated decision-making
Solution Approach 2:
The system performs self-service by automatically selecting and reconfiguring codecs based on monitored radio signal strength without requiring complex external control. The terminal autonomously adapts to network conditions, simplifying overall system operation while improving adaptability
3Ease of manufacture
If data allocated to each channel is not completely filled, then the bandwidth allocation is simple, but stuffing data must be used and bandwidth utilization is inefficient
Solution Approach 1:
The patent applies partial action by selectively filling channel capacity based on actual video quality requirements. Instead of always filling to maximum capacity with stuffing data, the system uses only the necessary bandwidth for quality transmission, improving efficiency without complex reallocation mechanisms
4Stability of the object's composition
If the protocol operates irrespective of network status, then the protocol implementation is simple and stable, but the VT quality deteriorates compared to terminal performance
Solution Approach 1:
The patent performs preliminary actions by selecting appropriate codecs before video transmission based on current radio signal strength. This advance preparation ensures optimal codec selection for upcoming transmission conditions, improving VT quality while maintaining protocol stability through pre-planned configurations
Data Source
AI summary
A method and apparatus for Video Telephony (VT) based on the radio signal strength in a radio terminal are provided. The method includes performing a signaling process for the VT, determining audio/video codecs to be used in the VT by considering the radio signal strength during the signaling process, performing the VT, and reconfiguring the audio/video codecs to be used in a VT process by considering the radio signal strength during the VT.