Hybrid Broadcast Multicast Transition Mechanism
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Solution Overview
Problem
Broadcast transmission technologies are susceptible to interference and attenuation, leading to sub-optimal user experiences due to lack of coverage or poor video quality, especially indoors or in areas without direct line of sight, as they fail to accurately assess video quality rendered on devices.
Innovation Solution
A mechanism for transitioning between broadcast and multicast/unicast media reception is introduced, dynamically analyzing broadcast media quality and using mapping tables to switch to multicast/unicast networks when quality thresholds are met, ensuring seamless media stream alignment and switchover by acquiring both broadcast and multicast/unicast media and monitoring presentation time stamps for synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If broadcast transmission technologies are used to provide media services over a large coverage area, then coverage area is improved, but video quality and reliability deteriorate due to interference and attenuation from buildings, foliage, and geography
Solution Approach 1:
The patent combines broadcast and multicast/unicast transmission technologies into a hybrid system. The broadcast receiver is enhanced with multicast/unicast capabilities, allowing it to receive media from multiple sources simultaneously. This merging enables the system to leverage the wide coverage of broadcast while supplementing it with the reliability of multicast/unicast for areas experiencing poor broadcast signal quality.
Solution Approach 2:
The system dynamically changes the transmission mode parameter based on signal quality conditions. When broadcast signal quality deteriorates due to interference or attenuation, the system transitions to using multicast/unicast transmission for that particular media stream. This parameter change allows the system to adapt to varying environmental conditions while maintaining both wide coverage and reliable video quality.
2Area of stationary object
If broadcast signals are transmitted to provide wide area coverage, then coverage is improved, but media delivery reliability deteriorates in areas without direct line of sight such as indoors
Solution Approach 1:
The system performs preliminary actions by continuously monitoring broadcast signal quality parameters and pre-positioning multicast/unicast media streams in case of signal degradation. When the receiver detects poor broadcast signal quality (such as when entering an indoor environment without direct line of sight), the preliminary prepared multicast/unicast streams can be immediately activated to maintain media delivery continuity.
Solution Approach 2:
The enhanced broadcast receiver acts as an intermediary that can access both broadcast and multicast/unicast media sources. This intermediary capability allows the system to switch between transmission modes seamlessly, providing wide coverage through broadcast while ensuring reliable media delivery through multicast/unicast when broadcast signals fail, particularly in indoor environments.
3Reliability
If the system monitors broadcast media quality and transitions to multicast/unicast when thresholds are met, then video quality is improved, but system complexity increases due to quality analysis and coordination mechanisms
Solution Approach 1:
The broadcast receiver is designed with multi-functionality, serving both as a traditional broadcast receiver and as a multicast/unicast receiver. This universal design allows the same hardware platform to perform quality monitoring, decision-making, and media reception from multiple sources without requiring separate dedicated systems, thereby managing complexity while improving video quality.
Solution Approach 2:
The system implements feedback mechanisms where the broadcast receiver continuously monitors the quality of broadcast media and uses this information to determine when to transition to or from multicast/unicast sources. This feedback loop enables automatic quality optimization while managing system complexity through standardized quality assessment protocols and threshold-based decision logic.
4Manufacturing precision
If both broadcast and multicast/unicast media are acquired during transition, then media stream alignment is improved, but time loss increases due to synchronization requirements
Solution Approach 1:
During transition periods, the system performs preliminary actions by acquiring and buffering both broadcast and multicast/unicast media streams in advance. This preliminary acquisition allows the system to pre-align the streams and prepare synchronization parameters before the actual switch occurs, reducing the overall transition time while maintaining precise media stream alignment.
Solution Approach 2:
The system dynamically adjusts the transition timing and synchronization parameters based on real-time conditions. By making the transition process dynamic rather than rigid, the system can optimize the balance between stream alignment precision and transition speed, minimizing time loss while ensuring accurate media stream continuity during mode switching.
Data Source
AI summary
Mechanisms are provided for efficient transition between broadcast media reception and multicast/unicast media reception. Broadcast media quality is dynamically analyzed to determine when transition is appropriate. Broadcast services are mapped to multicast/unicast delivered services. Transition occurs smoothly by acquiring both broadcast and multicast/unicast media during transition and analyzing timing data to allow for media stream alignment and switchover.