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Interlaced field rate is not the same as progressive frame rate

A mode label can count fields rather than complete progressive frames. Preserve the scan notation when discussing motion or choosing an output mode.

IPTV Canada editorial · Published 2026-11-04 · Canadian English

Codec and format reference
Format reference illustration; the source and output specifications must be checked for the actual programme and device.

Read the letter as well as the number

Interlaced and progressive descriptions identify different picture structures. An interlaced mode presents fields; a progressive mode presents complete progressive pictures. Manufacturer tables can make that distinction explicit.

Infomir's output reference distinguishes scan method and field-based entries. Do not strip the i or p from a mode and treat the remaining number as a universal source frame count.

Keep source and output apart

The receiver's output mode describes the signal sent to the screen. It does not independently establish how the programme was captured or encoded. A device can process an interlaced source before output.

A television banner reporting one mode is therefore useful output evidence, not a source-format audit.

Observe the actual motion symptom

Look for comb-like separation on moving edges, repeated cadence or a true pause. These are different observations. Continuous speech with combed edges is not the same as playback waiting.

Use a permitted repeatable passage and keep scale, player and display processing unchanged for a comparison.

Use deinterlacing only in its scope

VLC's versioned desktop documentation describes deinterlacing options. They address an image-structure problem, not every kind of blur or stutter.

Record the original state, compare a relevant supported option and evaluate normal-speed motion as well as a paused frame. Restore an unhelpful change.

Report scan information honestly

Include the full source or output label and identify which it is. If scan information is unknown, say so instead of guessing from the programme's age or country.

No source or receiver was measured here. This explanation does not prescribe one filter or output mode for every channel and does not certify IPTV Canada formats.

Avoid a numerical upgrade assumption

A larger number can describe another stage or scan structure rather than a simple improvement. Compare the complete mode and the actual visual result instead of choosing a label by size alone. Historical manufacturer tables also contain model-specific details, so use the actual equipment manual for accepted values. The useful support note retains scan notation, source/output context and the symptom shape together, allowing an image-processing question to be distinguished from a delivery interruption. If the diagnostic offers only an ambiguous rate, preserve its exact wording. Do not silently relabel it as progressive frames based on appearance alone.

Sources and scope

Scope notes distinguish published documentation, supplied information and editorial methods. They do not report a hands-on service test.

  • Infomir scan and output modes — Official table inspected: interlaced fields and progressive output distinctions. Historical model values/recovery instructions are not generalised.
  • VLC deinterlacing controls — Official versioned excerpt: deinterlacing methods; no universal filter prescription.
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