Downloaded 57 times
Uploaded byNewtec
Ka-Band for News
The document discusses the capabilities and challenges of using Ka-band for satellite broadcasting, particularly in news gathering. It highlights concerns about quality of service impacted by rain fades, compared to Ku-band, and outlines solutions like ACM controlled adaptive video technology to enhance live video contributions. The conclusion suggests that while video effectively utilizes Ka-band capacity, collaboration on new service level agreements among stakeholders is essential.
More Related Content
Ka-Band for News
- 1. Ka-Band for News ACM Controlled Adaptive Video WBU-ISOG Forum, May 31st, 2012 Slava Frayter slava.frayter@newtec.eu Broadband Systems Professional Equipment IP Software
- 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. What is impactingQoS 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 Video 3 © Newtec Cy nv – All Rights Reserved. Newtec confidential and proprietary information
- 4. Ka-Band: Rain affectingthe Minimum SLA Rain Fade X dB/sec 1dB: Ku fade event 4dB: Ka fade event CIR, SLAmin: Live CBR contribution Fade 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 tests Ka: Faster fading (high dB/sec)` © Newtec Cy nv – All Rights Reserved. Newtec confidential and proprietary information
- 5. ACM Controlled AdaptiveVideo 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 Mbps 5 © Newtec Cy nv – All Rights Reserved. Newtec confidential and proprietary information
- 6. ACM Controlled AdaptiveVideo 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 break 6 © Newtec Cy nv – All Rights Reserved. Newtec confidential and proprietary information
- 7. ACM Controlled AdaptiveVideo 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 encoder 7 © Newtec Cy nv – All Rights Reserved. Newtec confidential and proprietary information
- 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
- 9.
- 10. Company confidential 10 Unrestricted
Editor's Notes
- #6 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.