Video Stream Image Transmission Adaptation for Degraded Links
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Solution Overview
Problem
Existing video conferencing systems face challenges in allowing users to browse, review, or distribute data images easily due to real-time video stream constraints, and modifying transmission parameters to compensate for a degraded link degrades the stream quality for all receivers.
Innovation Solution
A system that transmits a video bit stream to multiple receivers using common parameters, identifies and adapts transmission parameters for a degraded link by selecting specific images and encoding techniques, while maintaining standard parameters for other receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission parameters are modified to compensate for a degraded transmission link to a single receiver, then the reliability of data transmission to that receiver is improved, but the stream quality to all receivers is degraded
Solution Approach 1:
The system segments the video stream into individual frames and further divides them into important (I-frames) and non-important (P-frames) portions. This segmentation allows selective transmission of only the critical I-frames to receivers with degraded links, while maintaining full stream quality for receivers with good connections, thereby resolving the contradiction between reliability and productivity.
Solution Approach 2:
The system applies different transmission strategies to different receivers based on their link quality. receivers with degraded links receive only I-frames with adjusted parameters, while receivers with good links receive the complete stream. This local differentiation allows each receiver to receive optimized transmission parameters tailored to their specific conditions, preventing global quality degradation.
2Reliability
If transmission parameters are modified to compensate for packet losses on a degraded link, then the reliability of data transmission is improved, but the bit rate is reduced for all receivers
Solution Approach 1:
By segmenting the video stream into I-frames and P-frames, the system can transmit only the essential I-frames to receivers experiencing packet losses, reducing the overall bit rate requirement while maintaining acceptable reliability. This selective transmission avoids the need to reduce bit rate for all receivers.
Solution Approach 2:
The system transmits more data (complete P-frames) to receivers with good links and only essential data (I-frames) to receivers with degraded links. This partial transmission approach to degraded receivers reduces the average bit rate while maintaining high quality for well-connected receivers.
3Device complexity
If the same transmission parameters are used for all receivers, then the device complexity is reduced, but the adaptability to different transmission link conditions is worsened
Solution Approach 1:
The system dynamically adjusts transmission parameters based on real-time link quality assessment. Each receiver's link conditions are monitored, and transmission parameters (such as whether to send I-frames only or full frames) are adapted accordingly. This dynamic adaptation provides versatility without requiring overly complex static configuration.
Solution Approach 2:
The system implements feedback mechanisms where receivers report their link quality status, and the transmitter adjusts transmission parameters accordingly. This feedback loop enables the system to adapt to changing network conditions while maintaining manageable complexity through automated parameter adjustment.
Data Source
AI summary
Systems for controlling a presentation of data images in a video stream, comprising: at least one processor programmed to: transmit a video bit stream representing a plurality of images to a plurality of receivers using common transmission parameters; determine that a transmission link to one of the plurality of receivers is degraded; select one of the plurality of images for transmission to the one of the plurality of receivers; select degraded-link transmission parameters for transmission of the one of the plurality of images on the degraded transmission link, wherein the degraded-link transmission parameters are different from the common transmission parameters; transmit the one of the plurality of images to the one of the plurality of receivers using the degraded-link transmission parameters; and continue to transmit the video bit stream to at least one other of the plurality of receivers using the common transmission parameters.