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Protecting media streams

Protecting media streams. Addressing the main concern of our customers - reliability of IP networks. Traditional redundancy schemes: Baseband layer : No redundancy or simple redundancy (DAs and CHOs at the edge) SDH (DTM): 50ms recovery

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Protecting media streams

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  1. Protecting media streams Nevion Confidential

  2. Addressing the main concern of our customers- reliability of IP networks • Traditional redundancy schemes: • Baseband layer: No redundancy or simple redundancy (DAs and CHOs at the edge) • SDH (DTM): 50ms recovery • IP networks: might have built-in protection of circuits, but ... • Redundant paths are activated on network failures and not on video stream failures • Protection switching is done by the core routers, and will typically take several seconds All traditional alternatives will create service outage and affect equipment in the downstream path

  3. Media transport protection options • FEC according to SMPTE 2022-1 and 2022-5 • Protection switching via SIPS • SIPS enhancement – LDO • Launch Delay Offset • Protection for simultaneous loss on both Network streams • SIPS Enhancement – EPP • Encoder Partner Protection • Protection for hardware failures in 1+1 configuration

  4. Nevion’s SIPS technology:Next generation solution for redundancy • Streaming Intelligent Protection Switching (SIPS) • Fundamental building block for next generation managed video services • Slipless switching at IP layer • Does not affect services - no outages, no affection of downstream path • Works with multiple IP path configurations - dual and single • 1+1 edge equipment redundancy can be added to further increase availability • Common feature in the VS902/VS906 suite • SIPS provides unparalleled service level to the Broadcaster • – even better than traditional video networks

  5. Video-layer service protection- what issue are we trying to solve? • IP networks might have built-in protection of circuits, but ... • Redundant paths are activated on network failures and not on video stream failures

  6. Nevion’s SIPS technologyNext generation solution for redundancy

  7. Video-layer service protection- Dual network interfaces SIPSTM Video in(ASI, SDI) Video out(ASI, SDI) • Protectionswitching done by Decoder • Sliplessswitching is provided by NevionsStreaming Intelligent ProtectionSwitching (SIPSTM) • Reduncancyprovided in case of: • Link failure in the core • Equipmentfailure in the core • Redundancyprovided by corerouters and switches • Link failurebetweenEncoder/Decoder and IP edgerouter • Noredundancyprovided in case of: • Encoder/Decoderequipmentfailure • Video source missing • Errors in video source signal

  8. Ventura VS902 architectureSIPS and Input Protection Switching

  9. Seamless Switching • Media is replicated and encapsulated over dual networks • Network routed over diverse path • Receivers buffers and time aligns packets from diverse network • Receiver selects best packet to provide error/glitch free switching Optimum Stream Look ahead switch Buffer Buffer Stream Analysis

  10. SIPS – Pros and Cons • Can be used for any media • Protects for the most common Link failures • Switch event is seamless (not detectable or measurable) • Protection capability is up and running with <1 second of link restoration and in the millisecond range on restoration of packet flows • If diverse path is not guaranteed, Simultaneous loss of both feeds results in unrecoverable event. • Double bandwidth utilization • No protection for hardware failures

  11. SIPS-LDO – Solution to lack of diverse path • Recent broadcast audio application in Europe • Contribution Audio (National Radio Network) over IP • Ethernet over SDH infrastructure • No control over infrastructure • Worried over the 50ms APS gap • FEC cannot bridge APS gaps • Leveraged SIPS with Launch Delay Offset

  12. Launch Delay Offset • Encoder launches primary stream immediately. • Launches secondary stream delayed by 60ms to cover 50ms APS • In an APS event, the secondary stream arrives outside of the 50ms switchover • SIPS selects the best packet for perfect switch

  13. SIPS-EPP – Solution for Hardware Protection • For a 1+1 hardware protection with perfect switching • Inter-connect two SIPS capable encoders at transmitter

  14. Encoder Partner Protection • For a 1+1 hardware protection with perfect switching • Inter-connect two SIPS capable encoders at transmitter • Video transmitted on Master-Primary and Slave-Secondary • Receivers are independent and operate on SIPS from Master/Slave flows

  15. Encoder Partner Protection • The types of faults that will result in a perfect switch are: • Failure to input on the Slave, • Failure of the Slave, • Failure of any link or network node. • The types of faults that will result in a non-perfect switch are: • Failure to input on the Master, • Failure of the Master. • Failure of cross strap, the Slave will automatically output from its internal engine. • The receiver will detect non-coherence in the primary and secondary feeds but maintains lock on the primary stream.

  16. Encoder partner protect (EPP) • Site hardware redundancy • Encoders in different chassis/racks/building • Duplicate launch • Flows coherent at RTP layer received by Decoders (required by SIPS) • Cards cross connected • Slave normally sends copy of master channels feed • Active and Passive modes

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