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Broadcasting restack. Presentation by Chris Hose, Executive Manager, Technical Planning and Evaluation Branch, ACMA


Chris Hose - Restack Presentation

Chris Hose - Restack Presentation

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  • yellow shows the Digital Dividend.


  • 1. Update on the Restack of Digital Television Services Chris Hose Executive Manager, Technical Planning and Evaluation Branch, ACMA
  • 2. Overview
    • Background
    • Restack Objectives, Planning Approaches and Principles,
      • Proposals and consultation
      • Decisions
    • Next steps
  • 3. Background to Restack
    • Clearance of 126 MHz (694-820 MHz)
    • Repacking of television services within the remaining broadcasting spectrum while retaining a high quality broadcasting service
    • Restack objectives and guidance:
      • Government Decision
      • Ministerial Direction
  • 4. ‘ Current’ – Analog/digital simulcast
  • 5. Post switchover – Digital only
  • 6. Post restack TBD
  • 7. Example Block Plan
  • 8. Example Minimum Moves Plan
  • 9. Indicative Restack Process Channel planning Channel Planning Implementation Implementation Implementation Implementation Implementation Time ? Implementation Region 2 Region 1 ? Region 3 ? Region 4 ? Region 5 ? Region 6 Channel planning Channel planning Channel planning Channel planning ?
  • 10. Consultation Process
    • ACMA Restack Discussion paper included proposals on:
      • Restack Objectives
      • Restack Channel Planning Approach
      • Restack Planning Principles
    • Queensland case study
    • The ACMA’s preliminary view on block channel planning was influenced by a number of cost/timing comparisons which were dependent on the implementation method assumed
    • Key purpose of the discussion paper was to test some of the ACMA’s assumptions prior to a final decision
  • 11. Consultation Process
    • 16 + 1 submissions received
    • Generally supportive of objectives and principles
    • Key learning:
      • Implementation Method
        • Retuning combiners on site not practical in the time available
      • Impact on cost and timing analysis comparing planning approaches
  • 12. Decision on Restack Objectives
    • clear the digital dividend band of broadcasting services as soon as practicable*
    • plan for six digital channels at each transmission site*
    • plan for six VHF channels at all metropolitan main station sites*
    • plan such that coverage of all six channels is similar
    • maintain or improve digital television coverage
    • simplify viewer reception of terrestrial digital television
    • establish spectrum planning arrangements that support future needs
    • retain 14 MHz of spectrum in VHF Band III for possible expansion of digital radio*
    • comply with the legislated framework
    • consistent with the minister’s direction, the ACMA should wherever possible:*
      • minimise viewer costs and disruption
      • minimise commercial and national broadcaster costs.
  • 13. Restack Planning Approach
    • Update to QLD case study cost/timing analysis comparison
    • New implementation method:
      • Hybrid temporary retune unit (TRU) - replacement of combiners, retuning of transmitters
    • Case study analysis of hybrid TRU method:
      • Little change in the modelled relative costs between planning approaches
      • Minor change in modelled time to implement between planning approaches – however not enough to vary broad conclusions
    • Little change to other conclusions re: viewer impact & block benefits
  • 14. Restack Planning Approach
    • In summary the ACMA :
      • found little difference between planning approaches in terms of broadcaster costs and time to implement implications;
      • found little difference between planning approaches in terms of viewer costs and disruption;
      • found that the block planning approach has strong support from commercial broadcasters; and
      • concluded the block planning approach has modest but real long-term benefits when compared to the minimum moves planning approach.
    • The ACMA has therefore decided to adopt the block channel planning approach
  • 15. Restack Principles
    • 11 principles identified addressing:
      • the core requirements of restack
      • a digital radio (DAB+) sub-band
      • the block planning approach
      • channel assignment and block selection guidance
      • future use of SFNs
      • technical planning parameters
      • transmission equalisation
      • channel availability timing constraints
  • 16. What’s next?
    • Nationwide channel plan for key sites
    • High level channel planning & implementation schedule
    • Technical restack policy document
    • Non-metro WA channel plan variation
    • Area-by-area channel planning
      • SA, Victoria, Queensland
  • 17. Conclusion
    • Major progress on restack channel planning:
      • ‘ block’ channel planning approach decided
      • restack planning principles determined
    • Detailed channel planning has commenced
    • Success continues to require a highly collaborative public/private approach
    • Time remains of the essence
    • Stay tuned for further developments