Ka-Band for News

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At the WBU-ISOG Forum, May 31st, 2012, Slava Frayter
from Newtec presented on Ka-Band for News .

Topics discussed where:
- Ka band facts
- QoS on Ka band, minimum SLA
- ACM controlled adaptive video


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  • SMPTE 2022-4 : Unidirectional Transport of Non-Piecewise Constant Variable Bit Rate MPEG-2 Streams on IP Networks. This standard defines a transport protocol for the carriage of real-time non-piecewise constant variable bit rate (VBR) MPEG-2 Transport Streams over IP networks, either with or without Forward Error Correction for recovery from network transmission errors. A non-piecewise constant VBR transport stream has no predictable time base to reconstruct the signal if the inter-packet timing is altered in transit through the network. This standard defines two methods to maintain the inter-packet timing through the non-synchronous IP network transport. This standard covers the encapsulation and transmission of MPEG-2 transport streams but does not cover other processes such as MPEG-2 encoding or multiplexing. The scope of this standard is shown in Figure 1.
  • Ka-Band for News

    1. 1. Ka-Band for News ACM Controlled Adaptive Video WBU-ISOG Forum, May 31st, 2012 Slava Frayter slava.frayter@newtec.euBroadband SystemsProfessional EquipmentIP Software
    2. 2. Ka Band facts  Almost 40 satellites with Ka band capacity  Estimated over 200 Ka Band transponders  WW footprint  Excess capacity – frequency re-use across spotbeams  Lease cost for Ka Band is lower than C/Ku So ?  Satellite operators understand that video is the best means to fill the pipe  Broadcasters and SNG operators have access to cost- effective bandwidth But …  Quality of Service remains a big concern for live video contribution such as Satellite News Gathering (SNG)2 © Newtec Cy nv – All Rights Reserved. Newtec confidential and proprietary information
    3. 3. What is impacting QoS on Ka Band ? Rain fades are the biggest source of QoS reduction on Ka Band • (dB) High Fade Depth, mostly related to rain fades – Much higher impact compared to Ku Band (and C Band) • (dB/Sec) High Fade Rate of signal fluctuation – Typically 0,1 to 1 dB/Sec ( up to 2.5 dB/sec) • (GHz) Frequency dependency – Impact on 20GHz is 3 times bigger compared to 11GHz Different technologies can help reduce the impact of rain fades • Uplink Power Control (UPC) • ACM Controlled Adaptive Video3 © Newtec Cy nv – All Rights Reserved. Newtec confidential and proprietary information
    4. 4. Ka-Band: Rain affecting the Minimum SLA Rain Fade X dB/sec 1dB: Ku fade event 4dB: Ka fade event CIR, SLAmin: Live CBR contributionFade depth of typical rain-fade event Ku = 1dB Ka = 4dB (below CIR?)Min bandwidth in thunderstorm C : little impact Ku: stayed working Ka: 2 or 3 outages experienced during overnight testsKa: Faster fading (high dB/sec)` © Newtec Cy nv – All Rights Reserved. Newtec confidential and proprietary information
    5. 5. ACM Controlled Adaptive Video ACM Control (Closed, Open, Managed) Satellite Modulator Satellite Demodulator Compressed Most of the time Compressed Video TS (ASI/IP) Video TS (ASI / IP) ModCod: 16APSK 5/6 SNG MPEG Encoder MPEG Decoder Es/No : 12 dB Baseband Video Baseband Video (SDI) Throughput 5MB: HD 16,1 Mb/s (SDI) Bad weather ModCod: QPSK 4/5 Es/No : 5.1 dB -7dB Post production Ingest & storage Video Bitrate : HD 7.7 Mbps5 © Newtec Cy nv – All Rights Reserved. Newtec confidential and proprietary information
    6. 6. ACM Controlled Adaptive Video When something is better than nothing Store and Forward – Preserve high quality video (time-shift) – Local recording of HQ video – Workflow for file transmission of high quality video clip for n+1 news break6 © Newtec Cy nv – All Rights Reserved. Newtec confidential and proprietary information
    7. 7. ACM Controlled Adaptive Video Technology Building blocks are available • ACM control loop and ACM satellite demodulator requirements – Accurate link margin measurement – Active margin prediction (fade speed) & management – Adaptive to rain fade depth (different frequencies) – Works with DVB-S2 and VSAT • Video encoder and decoder need to support variable rate MPEG TS – E.g. using SMPTE 2022-4 variable bitrate MPEG TS on IP • Store and Forward – High quality file store on modulator and/or MPEG encoder7 © Newtec Cy nv – All Rights Reserved. Newtec confidential and proprietary information
    8. 8. Conclusions • Video is the best manner to fill Ka band capacity at a lower operational cost • ACM Controlled Adaptive Video technology for live news gathering is mature enough to start building a solution set • The big question is : Are satellite operators, SNG operators and broadcasters willing to agree on new type of SLA?8 © Newtec Cy nv – All Rights Reserved. Newtec confidential and proprietary information
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    10. 10. Company confidential10 Unrestricted

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