Broadcast Data Recovery via IP Intermediary Networks
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Solution Overview
Problem
Legacy broadcast delivery networks face challenges in recovering lost or impaired data due to increasing interference levels, as traditional error correction codes are insufficient, leading to degraded service quality and potential unacceptability.
Innovation Solution
A system utilizing terrestrial and broadband IP networks for seamless broadcast data recovery, where recovery servers on the broadband network receive and resend missing or erroneous packets to receivers, optimizing bandwidth and reducing the need for high error correction codes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional error correction codes (RS, LDPC) are used to recover lost data in broadcast networks, then data recovery capability is maintained at low error rates, but the system becomes ineffective when interference exceeds the correction threshold
Solution Approach 1:
The patent introduces an intermediary IP network layer between the broadcast network and receivers. When broadcast data is impaired, receivers request retransmission of specific lost packets through the IP network, which acts as a mediator to recover only the necessary data segments rather than relying solely on traditional error correction codes
Solution Approach 2:
The patent segments the data recovery process into individual packet-level operations. Instead of using blanket error correction across entire data streams, the system identifies and recovers only specific impaired packets through selective retransmission requests, making the recovery process more adaptable to varying interference patterns
2Reliability
If bandwidth overhead is increased by adding error correction codes to cope with interference, then data recovery improves, but transmission efficiency decreases due to limited overhead capacity
Solution Approach 1:
The patent applies partial action by implementing error correction only where needed. Instead of adding comprehensive error correction codes to the entire broadcast stream, the system uses on-demand packet retransmission through IP networks only for specific impaired segments, reducing overall overhead while maintaining recovery capability
Solution Approach 2:
The patent changes the parameter of error correction from a fixed overhead percentage (3-5% in traditional systems) to a dynamic, demand-based approach. The IP network carries only the specific packets that need retransmission based on actual impairment detection, adapting the correction overhead to match actual error rates
3Reliability
If stream bitrate is reduced or transmission power increased to deal with error correction limits, then data integrity improves, but network capacity and cost efficiency deteriorate
Solution Approach 1:
The patent introduces dynamic adaptability to interference conditions through the IP-based recovery system. Rather than statically reducing bitrate or increasing power for all conditions, the system dynamically responds to actual impairment levels by triggering selective packet retransmission only when needed, maintaining data integrity without permanent network reconfiguration
4Reliability
If error correction overhead is increased beyond 3-5% in traditional broadcast systems, then more data can be recovered, but the cost and complexity of broadcast delivery becomes unacceptable
Solution Approach 1:
The patent uses the IP network as an intermediary to handle complex error recovery operations externally. Instead of embedding complex error correction mechanisms within the broadcast delivery system itself, the patent offloads packet recovery to the IP network infrastructure, maintaining simplicity in the broadcast core while achieving enhanced recovery capability
Data Source
AI summary
A system for data recovery using non-intrusive terrestrial and broad band connectivity of transmission of a data stream, the system having an IP distribution network for transferring the data stream from a sender to a plurality of receivers, the system having: a transmission center receiving the data stream from the sender and sending a continuous IP data stream to the IP distribution network and sending a broadcast data stream to a broadcast network; at least one registered/assigned recovery server connected to the IP distribution network and assigned to at least one of the plurality of receivers, the at least one recovery server receiving a protected IP stream from the transmission center; at least one of the plurality of receivers sending a recovery request to at least one recovery server when the respective receiver detects an erroneous/missing packet; and wherein the protected IP stream is encapsulated into RTP in the transmission center and the at least one recovery server sends a recovery data stream to the at least one of the plurality of receivers following receipt of the recovery request.