Progressive Segmented Frame

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Progressive segmented frame (PsF) is a video format that stores full-screen material as fields .

Each frame is divided into two fields without a phase shift of the individual lines within a field (segmented). Thus, the original full images can be reconstructed completely and loss-free from the fields sent in the interlaced process by weaving , without the need for interpolation or the comb effect typical of the interlaced process.

The HDTV format 1080i50 is then transmitted using the PsF method if [progressive] image material is available and transmitted with 25 full frames per second. This is e.g. This is the case, for example, with films that have been changed using the PAL speed-up process (acceleration of picture and sound and the associated increase in the latter), or if the original material consists of 25 frames per second - as in Antichrist or Melancholia , both of which were shot at 25fps (apart from a few shots with high-speed cameras ). The result then corresponds to the format 1080p25 . In this case, however, the HDTV display must “understand” that the image material is PsF material and that there is no temporal or spatial (spatial) offset (for pans and the like) between the fields and that there is one field from two fields Full screen may be composed. Any deinterlacing algorithms present on the screen must be deactivated. This distinction between interlaced and progressive segmented frame material must be recognized as such by HD receivers or HD-capable televisions so that 1080i50 material can be converted to 1080p25 and displayed without deinterlacing processing by the algorithms.

Individual evidence

1. ↑ Trevor Johnston: 'Antichrist' cinematographer Anthony Dod Mantle: interview . Time Out London. 2009. Accessed August 4, 2013. (English)