VOZ Total TV Report Guidelines

    Guidelines to using the VOZ Total TV Website Reports.

    What is VOZ?

    VOZ is the foundation of Australia’s new Total TV reporting standard, enabling all-screen, cross-platform planning and reporting. VOZ brings together broadcaster* content viewed on

    a) TV sets: ‘broadcast TV’, which is measured by OzTAM and Regional TAM’s TV ratings services, plus;

    b) Connected devices: ‘BVOD’, or broadcaster video on demand, which is measured by OzTAM’s VPM reporting service.

    *Broadcaster content comprises viewing of free-to-air and subscription broadcasters’ linear TV and BVOD services. This includes viewing through in-home TV sets (both live and played back up to 28 days later) and on connected devices such as connected TVs, tablets, smartphones and computers. Participating BVOD broadcasters: ABC, Seven Network, Nine Network, Network 10, SBS and Foxtel. 

    What are the VOZ National Total TV reports?

    The VOZ website reports are a fixed set of predefined daily and weekly reports providing a top line snapshot of de-duplicated national Total TV viewing for the following demographics:

    • Total People
    • People 16-39
    • People 25-54
    • Grocery Shoppers (18+)

    What data are the reports based on?

    VOZ De-duplicated Data

    VOZ provides true national, de-duplicated audience and reach estimates of all-screen broadcast TV and BVOD viewing. There are three types of duplication addressed in VOZ methodology:

    1. National view
      • VOZ unifies metro and regional viewing to a national picture, accommodating viewing in overlap market areas (spill viewing*) and including a new regional market, Rest of Australia**, which is not included in TAM.
    2. Service Measurement duplication
      • VOZ harmonises the formerly separate TAM (broadcast TV) and VPM (BVOD) measurement services to provide de-duplicated viewing estimates.
      • Current TAM measurement devices in TAM panel homes are picking up BVOD streaming viewing on connected TV sets that correspond to broadcast TV references.
      • The same BVOD viewing is being measured in VPM through SDKs.

        Current approach to resolving duplication:
      • VOZ 5.0 introduces a modelled approach to treat duplication via a post-production process to identify and remove matched viewing sessions from TAM estimates, but preserve them in BVOD estimates – creating a de-duplicated estimate for Total TV dayparts and program estimates.
      • This methodology provides a level of 2% average duplication across the day.

        VOZ Development Roadmap will move towards a technical solution including:
      • ~ 2,500 Streaming TV meters (STVMs) used for calibration purposes in the VPM demographic modelling process, and addressing duplication, will be increased to 100% of TAM panel homes.
      • OzTAM is working with broadcasters towards a longer-term permanent solution through encoding (watermarking) for their digital streams, to identify the source of the signal.

        This will create a robust Total TV measurement technology where duplication between TAM and BVOD measurement services is eliminated.
    3. Person level
      • VOZ derives person-level exposure to broadcaster content and advertising across all screens (TV sets, computers, tablets and smartphones), allowing unique viewers to be counted. That means people who have been exposed many times across screens can be counted as just one viewer reached in VOZ Total TV reach estimates.

        * In certain markets there are overlap areas where it is possible view both metro and regional broadcast channels. ‘Spill’ is viewing broadcast channels transmitted from a market that is outside of the market being analysed. For example, a viewer in Wollongong watches a broadcast that originated from Sydney, or a Brisbane viewer watches a broadcast that originated from the Northern Rivers.
        **Rest of Australia refers to all other regions of Australia outside of the existing OzTAM and Regional TAM markets, including the combined TV markets of Darwin, Remote Central + Mt Isa, Griffith, Mildura, Spencer Gulf (Port Pirie/Broken Hill) & Riverland/Mt Gambier.


    Program ranking reports are based on ‘What Watched’ audience data.

    The weekly cumulative reach report is based on ‘When Watched’ audience data.

    BVOD audience includes viewing to live streaming plus on-demand including co-viewing to connected TVs.

    What VOZ reports appear on the website?


    For each day across the calendar year, two reports are made available for all free-to-air (FTA) broadcasters plus their affiliates combined:

    1.) Total TV Overnight Top 30 Programs 

    National (by program) ranked on Total TV audience, detailing the Overnight broadcast TV audience in metro and regional markets and BVOD nationally.

    2.) Total TV Consolidated 7 Top 30 Programs

    National (by program) ranked on Total TV Consolidated 7 audience, detailing:

    • Broadcast TV metro and regiona Overnight and 7-day Time Shift;
    • National BVOD and;
    • ‘Lift on Overnight’: percentage increase on the national broadcast TV Overnight audience from broadcast TV 7-day Time Shift + BVOD.


    For each survey week (Sunday to Saturday) across the calendar year two reports are made available:

    1.) Total TV Consolidated 7 Top 20 Programs

    National (by program) ranked on Total TV audience for all participating free-to-air (FTA) broadcasters plus their affiliates combined, detailing the contribution of broadcast TV and BVOD viewing in metro and regional markets.

    • Top 5 Programs per demographic for each FTA broadcaster plus their affiliates.

    2.) Total TV ‘When Watched’ Reach by Demographic

    National, metro and regional weekly cumulative ‘When Watched’ reach ‘000s (‘only’, ‘only’, ‘both’):

    • audience that was reached by broadcaster content exclusively via broadcast TV (viewed at least 1 minute) or BVOD (viewed at least 15 seconds) ‘only’; and,
    • audience that was reached by broadcaster content via broadcast TV (viewed at least 1 minute) as well as BVOD (viewed at least 15 seconds) ‘both’.

    National weekly cumulative reach % (‘only, ‘only’, ‘both’):

    • broadcast TV or BVOD ‘only’ (i.e., incremental BVOD reach)
    • broadcast TV as well as BVOD (‘both’)

    More extensive granular VOZ data is available to OzTAM and Regional TAM elemental data subscribers, which they can use in their respective reporting.

    Minimum Program Length

    Programs less than 10 minutes in duration have been excluded from the program ranking reports.

    Sourcing VOZ data

    To ensure clarity of reporting please clearly source the VOZ data being used including date, daypart, demographic, market, data type (Overnight, Consolidated 7 or ‘When Watched’) and metrics. Also indicate whether you are referencing broadcast TV, BVOD and/or Total TV.

    Whenever VOZ data is cited or published OzTAM must be credited as the source. For example, Source: VOZ © OzTAM 2023 (reporting details as above).

    Reporting frequency

    Daily Reports

    • Total TV Overnight and Top 30 Programs: delivered daily, day after research day.
    • Total TV Consolidated 7 Top 30 Programs: delivered daily, for most recent consolidated date i.e., 8 days prior.

    Weekly Reports

    • Total TV Consolidated 7 Top 20 Programs: delivered Mondays following the most recent consolidated week i.e., week ending 9 days prior.
    • Total TV ‘When Watched’ Reach by Demographic: delivered Mondays following the most recent complete week i.e., week ending 2 days prior.

    Further details: see the VOZ Reports section on this site.

    Need more information?

    Check our frequently asked questions.