# What do the BBC File v6.0.2 (2026) and Channel 4/UK DPP File v5.2 delivery specifications say about up-converted, lower-resolution and frame-rate-converted material?

- id: art_01M5MC1YDD04RNXFWBZR0JVJ64
- type: article · status: active · revision: 2
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T10, T12, T20 · tags: none
- updated: 2026-10-24T22:30:47.935Z
- url: https://veyrul.com/articles/art_01M5MC1YDD04RNXFWBZR0JVJ64

Corrected 2026-10-24 - see C3-B1042-03; the original statements below are kept for history and are superseded where the correction says so. Both specs accept up-converted SD archive provided it meets the full technical requirements; both cap lower-resolution material at 25 percent of programme duration unless agreed; both require motion-compensated standards conversion and forbid simple timeline conversion. The Channel 4 spec adds that up-converted SD must look no worse than the original, requires removing half-line and blanking artefacts (hence a slight zoom), and requires agreement in advance for 50p to 25p film-motion conversion. In the passages read neither spec has a field or rule for declaring up-conversion; neither mentions AI (bounded: BBC text searched for "declar", "artificial", "generative" and the "AI" token with 0 hits; Channel 4 text searched for "declar" with 0 hits).

Both specs accept up-converted SD archive provided it meets the full technical requirements; both cap lower-resolution material at 25 percent of programme duration unless agreed; both require motion-compensated standards conversion and forbid simple timeline conversion. The Channel 4 spec adds that up-converted SD must look no worse than the original, requires removing half-line and blanking artefacts (hence a slight zoom), and requires agreement in advance for 50p to 25p film-motion conversion. In the passages read neither spec has a field or rule for declaring up-conversion; neither mentions AI (bounded: BBC text searched for "declar", "artificial", "generative" and the "AI" token with 0 hits; Channel 4 text searched for "declar" with 0 hits).

Curator correction 2026-10-24 (discovery audit record C3-B1042-03, curator-reviewed C3R-0686; excerpts re-located by independent curator GET 2026-10-24): Correction. C3-B079-G30-05 says "both require motion-compensated standards conversion". Re-read on 2026-10-24: BBC File v6.0.2 (version control 06/10/2026) section 2.7, p.13, and Channel 4 File v5.2 (06/06/22) section 1.6.3, p.9, both say "Motion Compensation standards conversion ... should normally be used" (a hedged recommendation), and both state that simple timeline conversion is not permitted. Channel 4 additionally marks specific conversions (for example 30p to 25p) as Motion Compensated Conversion required. The wording was overstated when written; the specs have not changed in this respect (BBC v6.0.2 version-control entry is dated 06/10/2026). The record's other claims in this area (25 percent cap on lower-resolution material, up-converted SD acceptable if all requirements are met) matched the text re-read.

Curator qualifications: All excerpts located; BBC File v6.0.2 and C4/DPP File v5.2: up-converted SD accepted if specs met, 25% cap unless agreed, motion-compensated conversion required.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://www.dropbox.com/s/sjsjlf4qtm68xc3/TechnicalDeliveryStandardsBBCFile.pdf?dl=1",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://assets-corporate.channel4.com/_flysystem/s3/documents/2023-03/ProgrammeDeliverySpecificationFile_DPP-Channel4_v5.2.pdf",
      "note": "candidate evidence excerpts"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] Curator correction 2026-10-24 (discovery audit record C3-B1042-03, curator-reviewed C3R-0686; excerpts re-located by independent curator GET 2026-10-24): Correction. C3-B079-G30-05 says "both require motion-compensated standards conversion". Re-read on 2026-10-24: BBC File v6.0.2 (version control 06/10/2026) section 2.7, p.13, and Channel 4 File v5.2 (06/06/22) section 1.6.3, p.9, both say "Motion Compensation standards conversion ... should normally be used" (a hedged recommendation), and both state that simple timeline conversion is not permitted. Channel 4 additionally marks specific conversions (for example 30p to 25p) as Motion Compensated Conversion required. The wording was overstated when written; the specs have not changed in this respect (BBC v6.0.2 version-control entry is dated 06/10/2026). The record's other claims in this area (25 percent cap on lower-resolution material, up-converted SD acceptable if all requirements are met) matched the text re-read. · locator: curator correction paragraph in this record body (C3-B1042-03) · source: https://www.dropbox.com/s/sjsjlf4qtm68xc3/TechnicalDeliveryStandardsBBCFile.pdf?dl=1
- [sourced_fact] SUPERSEDED IN PART 2026-10-24 by curator correction C3-B1042-03 (see the correction claim above); original kept for history: Both specs accept up-converted SD archive provided it meets the full technical requirements; both cap lower-resolution material at 25 percent of programme duration unless agreed; both require motion-compensated standards conversion and forbid simple timeline conversion. The Channel 4 spec adds that up-converted SD must look no worse than the original, requires removing half-line and blanking artefacts (hence a slight zoom), and requires agreement in advance for 50p to 25p film-motion conversion. In the passages read neither spec has a field or rule for declaring up-conversion; neither mentions AI (bounded: BBC text searched for "declar", "artificial", "generative" and the "AI" token with 0 hits; Channel 4 text searched for "declar" with 0 hits). · locator: candidate evidence excerpts · source: https://www.dropbox.com/s/sjsjlf4qtm68xc3/TechnicalDeliveryStandardsBBCFile.pdf?dl=1

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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