What is Progressive Scan?
Progressive scan records, transmits, or displays every line of each video frame in sequence. Interlaced video instead divides a frame into alternating fields containing different sets of lines.
How Progressive Scan works
Progressive video treats every decoded picture as a complete spatial frame, so adjacent lines describe the same captured instant rather than alternating field times. Capture cadence, encoded frame rate, and display refresh remain separate properties, even when the label carries a trailing p. In a media workflow it simplifies scaling and web presentation, while interlaced archives must be deinterlaced with attention to field order and motion before progressive encoding.
Key facts
- 1Progressive frames can be resized or paused without first combining fields from different times. This avoids the comb-shaped motion edges produced by treating interlaced fields as one frame.
- 2A “p” designation describes scan structure, not picture quality or cadence. Resolution, frame rate, compression, chroma sampling, and bitrate still determine other aspects of the signal.
- 3Deinterlacing is temporal reconstruction, not merely dropping every other line. Incorrect field order creates motion judder, while simple field discard sacrifices vertical detail.
When Progressive Scan matters
Choose progressive video for modern displays, web playback, and motion that should avoid interlace artifacts. Converting interlaced sources without effective deinterlacing can leave combing or discard temporal detail.