Video Stream Capability Negotiation Logic
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Solution Overview
Problem
Existing video conferencing systems face challenges in efficiently transmitting multiple video streams with varying resolutions to different recipients, as they lack a scalable and efficient method for capability and preference negotiation between participants.
Innovation Solution
The system employs capability and preference discovery and negotiation, where receivers specify their video receive capabilities and preferences, and the video source determines the negotiated video capabilities through a logic operation, ensuring compatible video stream transmission by comparing send and receive capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple video streams with varying resolutions are transmitted to different recipients, then video quality and adaptability are improved, but system complexity increases due to capability negotiation requirements
Solution Approach 1:
The system performs capability discovery and negotiation before actual video stream transmission. Each participant specifies their video receive capabilities and preferences in advance, allowing the source to pre-determine the appropriate video streams to transmit, thereby avoiding complexity during the actual transmission process
Solution Approach 2:
The patent introduces a capability negotiation mechanism as an intermediary layer between the video source and receivers. This negotiation process mediates the complexity by establishing agreed-upon capabilities before transmission, simplifying the actual video delivery process
2Productivity
If capability negotiation is implemented between participants, then video transmission efficiency is improved, but protocol complexity increases
Solution Approach 1:
The capability negotiation protocol is segmented into distinct phases: capability discovery, capability comparison, and preference specification. This segmentation allows each phase to be handled independently and simplifies the overall protocol implementation while maintaining efficiency
Solution Approach 2:
The system uses parameter-based negotiation where participants specify capabilities in terms of standard video parameters (resolution, frame rate, bit rate). This parameterization simplifies the negotiation process by reducing complex capability descriptions to comparable numerical values
3Ease of manufacture
If video streams are transcoded and reconstructed into one stream, then implementation simplicity is improved, but scalability deteriorates
Solution Approach 1:
The system dynamically adapts the number and type of video streams transmitted based on real-time capability negotiation results. Instead of using a fixed single-stream approach, the system can dynamically adjust to transmit multiple streams with different resolutions to different recipients, enabling scalability while maintaining implementation simplicity through automated capability matching
Data Source
AI summary
Video send and receive capabilities of participants are determined by the respective machines determining available combinations, as well as preferences for the receivers. Receiver capabilities are forwarded to the source for computation of negotiated video capabilities through a logic intersection of the determined capabilities based on desired number of streams and resolutions. If a resolution of a send capability exists within the receive capability, the highest frame and/or bit rate may be selected for transmission.