Video Transmission Redundancy Control for Sync Deviation Recovery
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Solution Overview
Problem
Existing multimedia data transmission systems face challenges in maintaining low delay and reliability due to synchronization deviations, leading to periodic fluctuations in display time and inefficient network bandwidth usage when recovering from packet losses.
Innovation Solution
A transmission system that includes a video signal transmission unit, a time information reception unit, and a degree-of-redundancy determination unit, which measures the duration from reception to display start time and adjusts the degree of redundancy for video signals based on received time information to improve recovery performance while minimizing network bandwidth usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant packets are added during transmission to improve reliability, then data recovery capability is improved, but network bandwidth usage increases
Solution Approach 1:
The patent implements dynamic adjustment of redundancy degree based on real-time synchronization deviation measurements. The degree-of-redundancy determination unit continuously monitors synchronization status and adjusts the number of redundant packets accordingly, transitioning from static to dynamic redundancy management. This resolves the contradiction by making bandwidth usage adaptive rather than constant, optimizing the trade-off between reliability and resource consumption.
Solution Approach 2:
The system changes the parameter of redundancy degree dynamically based on synchronization deviation conditions. When synchronization deviation is detected, the system adjusts the redundancy parameter to match the actual recovery needs, rather than maintaining a fixed high redundancy level. This parameter adaptation allows the system to maintain adequate recovery capability while reducing unnecessary bandwidth consumption during normal operation.
2Reliability
If the transmission side and reception side are not in synchronization, then display time fluctuates periodically, but recovery performance from loss also fluctuates
Solution Approach 1:
The patent implements a feedback mechanism where the reception side measures synchronization deviation and feeds this information back to the transmission side. The time information reception unit receives duration measurements from the reception side, and this feedback is used to adjust the redundancy degree. This closed-loop feedback system allows the transmission system to respond to synchronization fluctuations and adapt recovery strategies accordingly, stabilizing overall system performance despite periodic display time variations.
Solution Approach 2:
The system performs preliminary assessment of synchronization deviation and proactively adjusts redundancy levels before data loss occurs. By measuring the duration from video signal reception to display start timing, the system can predict potential synchronization issues and pre-adjust the degree of redundancy, enabling more effective recovery performance before actual problems manifest.
3Reliability
If redundant packets are added without considering synchronization deviation, then data recovery is possible, but more network bandwidth than necessary is used
Solution Approach 1:
The system dynamically changes the redundancy parameter based on actual synchronization deviation measurements. Instead of using a fixed high redundancy level, the degree-of-redundancy determination unit adjusts this parameter in response to measured duration variations, ensuring adequate recovery capability while minimizing unnecessary bandwidth consumption during stable transmission periods.
Solution Approach 2:
The system uses its own synchronization deviation measurements to self-regulate the redundancy level. The reception side measures the duration from video signal reception to display start timing, and this self-generated information is used to control the transmission side's redundancy behavior, eliminating the need for external control or fixed conservative settings.
Data Source
AI summary
There is provided a transmission apparatus including a video signal transmission unit configured to transmit a video signal to another apparatus, a time information reception unit configured to receive, from the other apparatus, time information including a duration from reception of the video signal until a timing at which display of each frame in the video signal starts at the other apparatus, and a degree-of-redundancy determination unit configured to determine a degree of redundancy for the video signal transmitted from the video signal transmission unit based on the time information received by the time information reception unit.