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Loudness 201: Advanced Loudness Webinar

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Loudness 201: Advanced Loudness Webinar

  1. 1. Loudness 201 Review of Loudness 101 & Advanced Loudness Discussion Andrew Sachs Jennifer Knutel VP. Product Management Sr. Dir of Marketing
  2. 2. How to Participate Today 1. 1. Open and close your Panel 2. Submit text questions 2. • Q&A addressed at the end of today’s session • Everyone will receive an email within 48 hours with a link to view a recorded version of today’s session
  3. 3. Agenda • Loudness 101 Review – Why loudness? – Specs/Regs including BS.1770-2, – Gating – reflecting perception, avoid gaming • Advanced Loudness – Changes in Regulations – ITU & Countries – Network Certification – What is this? – International Carriage Considerations • Volicon Solution Overview • Q&A
  4. 4. Why Loudness? • Tragedy of the Commons Difference • Level according to peaks is much larger • Users pay more attention to loud content PGM PGM PGM than with analog – Advertising recognition is higher Ad Ad – Advertisers KNOW and use this • Users feel they need to adjust volume – Detracting from their overall QoE Volume Adjustments – Solution: • Level according to “loudness perception” No Volume Adjustments • Content flexibility with good user experience – Now, what is “loudness perception”?
  5. 5. Loudness Specifications & Regulations Specification BS.1770-2 LKFS gated What is loudness? Recommended Practices How to use loudness R128 Tech 3341/2/3 A/85 RP TR-B32 Regulation How it is enforced
  6. 6. Loudness Specification • BS.1770-2 (03/2011) -Loudness, True Peak & Gating – Not all frequencies are equal – Not all (surround) channels are equal • Rear Surrounds are overweighted +1.5 dB • LFE is not counted – One loudness meas for all channels combined – Gating to not count quiet periods • Don’t allow gaming of measurement • Level gating is in BS-1770-2, Dialog gating is not
  7. 7. Gating Review - What’s the big deal? • Gating is critical – Ensure correlation with loudness perception – Helps prevent gaming by advertisers x.y LKFS • Gating is specified 2/3 different ways: gate – BS.1770-2, EBU, Most of the world – Cascaded level -10dB – ATSC • Short Form: No Gating, measure everything • Long form (>2m) : Dialog Level – aka Dialog gating • Measurements with different gating – need agreement with: – Regulatory authority – What is being enforced – Partners – Studio, Network, Broadcaster, Pay-TV operator • Troubleshooting Apples v. oranges is not productive
  8. 8. Changes in Regulations • Many countries moving forward with loudness regulation – Brazil, France, … – Almost all countries are using EBU /BS.1770-2 measurements – Commercial v. Channel is regulated by all – Other different items may be regulated • Absolute channel tolerance or channel to channel difference (many) • 5 day channel loudness drift – Italy • Max S Measurement, - France • Min Loudness Range – France • Enforcement is starting…. – Italy- active, US - Dec 2012, many in 2013 – Time to get real
  9. 9. Considerations for International Carriage • Content going to one country? – Design and measure and alarm using local gating and regulations • Content going to multiple countries? – Same Gating – possibly different thresholds • Measure with one gating, • Alarm on most restrictive thresholds -24 LKFS – Different Gating – e.g. Dialog and Cascaded level • Measure content twice – once with each Gating – Differences are unpredictable, no applicable rule of thumb – -24 LKFS is NOT -23 LUFS!!! • Apply tightest thresholds for each gating method (by country)
  10. 10. ATSC Network Certification – Why? • Where does the blame fall in the chain? – Programmer, Network, Broadcaster, MVPD? Enforces Protects Regulates Network Broadcaster MVPD Cable Blame Programmer Satellite Cable IPTV Network
  11. 11. ATSC Network Certification – Why? • To allow broadcasters and MVPDs to – Guarantee what they deliver – Respond to complaint inquiries – Not redo work performed by others • Two step process if you do insert ads – Get certification on Network – Or certify it yourself – Guarantee your ad inserts are compliant
  12. 12. ATSC Network Certification – What? • Accessible – Made generally available by Network (web) – Allows all Broadcaster and MVPDS to access • Content – Not regulated – but must convince FCC/MVPDs – Several approaches – Legal statement certifiying compliance – Measurements showing compliance PGM1 -23.6 LKFS COM12 -24.0 LKFS PGM2 -24.1 LKFS – Either require backup - Volicon! ..
  13. 13. ATSC Network Certification – Who • Who is to provide certification? – Anyone who wants to help their downstream partners – Practically – (Cable) Networks Protects Regulates Network Broadcaster MVPD Cable Programmer Satellite Cable IPTV Network
  14. 14. Observer Loudness Monitoring • Loudness measurements -LKFS and LUFS -with gating • Short (S), Medium (M) and Interval (I) measurements • Up to 7 Short-form Interval (SI) - e.g 10s, 15s, 20s, 30s • Up to 7 Long-form Interval (LI) - e.g. 6h, 1d, 5d • Loudness Range (LRA) to measure audio companding • Detailed 10Hz measurements - with Audio & Video
  15. 15. Observer Loudness Monitoring • Graphing of S, M and I measurements over time Multiple channel, multiple meas. Graph <=> video time navigation • Export : Logged measurements as csv Affidavit - A/V with burned in measurements CSV values report • Programs Certification Report export With As-Run-Log Integration Loudness of Every Asset A/V affidavit With meas Burn-in • Alarming (SNMP, email, visual) Customizable alarming profiles based on SI and LI measurements
  16. 16. Observer Loggers with Loudness • Software module available on – Observer, Observer TS, RPM • Observer family of products are loggers at the core – Records audio, video & loudness measurements continuously – 3 to 365 days of storage • Logger + measurement is very powerful – Speeds troubleshooting, unambiguous affidavit – Eliminates Network Station MVPD back and forth Loudness logging is not a sea of numbers. It means recording the audio, video, and the loudness measurements.
  17. 17. Loudness Detail - specs a85 rp 2011 • ATSC A/85 RP • ITU BS. 1770-1 BS.1770-1 BS.1770-2 BS.1770-2 • EBU R128 Tech 3341 EBU R128 Tech 3342 Tech 3341 Tech 3342 • Tech 3343 Tech 3344 Tech 3343 Tech 3344 • FCC Findings Dec 2011 – FCC Calm Act 11-182A1 • Cable Labs summary of CALM Act – For Cable Operators only CALM act summary 17
  18. 18. Q&A Andrew Sachs Jennifer Knutel VP. Product Management Sr. Dir of Marketing andrew@volicon.com jennifer@volicon.com Please contact us for additional product information
  19. 19. For more information please contact us (info@volicon.com) +1 781 221 7400 Andrew Sachs Jennifer Knutel VP. Product Management Sr. Dir of Marketing andrew@volicon.com jennifer@volicon.com

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