Planners who learned media buying on BARC linear TV ratings face a fundamental shift when moving to India CTV. The currencies, cadence, granularity, and buying mechanics are different enough that applying linear TV planning logic to CTV produces systematically wrong plans. This article maps the key differences and gives practical translation guidance.
Currency: GRPs vs impressions
Linear TV in India is bought on Gross Rating Points (GRPs) — a standardised audience delivery metric derived from BARC panel data. A GRP represents 1% of the target audience reached once. Buying TV means negotiating a GRP delivery target, with post-campaign reports confirming whether the commitment was met.
CTV has no equivalent currency. There is no BARC GRP for CTV in India — BARC OTT data is monthly and not used as a transactional buying currency. CTV is bought on CPM and impression volume. The buyer commits to a budget and receives impressions; audience verification is directional rather than transactional.
A linear TV plan guaranteeing "1,000 Target GRPs, SEC A, 25–44" cannot be directly translated to a CTV plan. The CTV equivalent is an estimated reach and frequency calculation against that audience segment — modelled, not panel-verified.
Cadence: weekly vs monthly data
BARC linear TV ratings are published weekly (every Thursday), enabling planners to adjust buys based on previous week's performance. BARC OTT data is monthly — a campaign that ran in April will have data available in late May. This makes in-flight optimisation based on audience delivery impossible for CTV. Planners use proxy metrics (VCR, delivery pacing, publisher estimates) for in-flight management, not BARC data.
Inventory selection: channel/time slot vs platform/audience/content
Linear TV planning selects specific channels and time slots based on BARC ratings. A prime-time slot on Star Plus during Anupamaa has a known GRP value for specific demographics. CTV planning selects platforms, audience segments, and content categories — not specific time slots. The programmatic system allocates impressions across available inventory matching the targeting criteria.
Reach and frequency: viewer vs device-level
BARC linear TV reach is measured at the individual viewer level using people meters — the panel counts actual viewers, including co-viewing. CTV programmatic reach is measured at the device level. The co-viewing multiplier (India average 2.0–2.5x) must be applied manually to convert device impressions to estimated viewer reach. A CTV campaign delivering 10 million device impressions likely reached 20–25 million viewers — but this estimate is not panel-verified.
Practical planning translation
| Linear TV concept | CTV equivalent | Accuracy |
|---|---|---|
| GRP | Estimated impressions / co-viewing multiplier | Modelled; not panel-verified |
| Channel selection by rating | Platform selection by BARC OTT MAU and device share | Directional; monthly data |
| Time-slot buy | Content category / audience segment buy | Programmatic allocation |
| Weekly rating optimisation | In-flight VCR and delivery optimisation | Proxy metrics; no audience data |
| Post-campaign GRP delivery report | Impressions delivered + modelled audience reach | DSP report; not BARC currency |