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Encyclopedia > Progressive segmented Frame

Progressive segmented Frame (PsF) is a High Definition video format used to store progressive content on interlaced media. It has been suggested that High Definition Video be merged into this article or section. ... Progressive scan Progressive or non-interlaced scanning is any method for displaying, storing or transmitting moving images in which the lines of each frame are drawn in sequence. ... Interlacing is a method of displaying images on a raster-scanned display device, such as a cathode ray tube (CRT). ...


Each progressive frame is segmented into two interlaced fields without interfield motion, or "combing". PsF is an alternative to 3:2 pulldown, wherein certain frames are "pulled down" across multiple fields, resulting in output with an irregular frame rate. In video, a field is one of the many still images which comprise a They are similar to frames, but they have half the vertical resolution and are displayed twice as fast. ... Telecine (pronounced teli-SEEN or teli-SINI) is the process of transferring motion picture film to a video format, such as television, or a machine used to complete this process. ... Frame rate, or frame frequency, is the measurement of how quickly an imaging device can produce unique consecutive images called frames. ...


Use

Motion picture film cameras produce progressive images, usually at 24 frames per second. In order to display those images on NTSC television, whose framerate is 29.97 frames per second interlaced (59.94 fields per second), each frame must be split into alternating groups of 3 and 2 fields. This is known as 3:2 pulldown. NTSC is the analog television system in use in Korea, Japan, United States, Canada and certain other places, mostly in the Americas (see map). ...


Certain high definition tape formats, such as HDCAM allow frame rates other than 29.97. It is therefore possible, using PsF, to store "true" 24 frames per second progressive images without pulldown, which then play back at the original framerate. Thus the 24PsF and 23.976PsF (for compatibility with NTSC) formats were devised, which exist on tape as 48 (or 47.952) fields per second interlaced. When set up correctly, a progressive scan monitor will read these interlaced fields two at a time, and display each pair as a single progressive frame, temporally identical to the source. PsF content can also be played back on interlaced displays, but the image will flicker. Betacam and VHS size comparison Betacam SP L, Betacam SP S, VHS Betacam is a family of half-inch professional videotape formats developed by Sony from 1982 onwards. ... A display device is a device for visual or tactile presentation of images (including text) acquired, stored, or transmitted in various forms. ... Flicker is visible fading between image frames displayed on cathode ray tube (CRT) based monitor. ...


Sony's CineAlta series of cameras are capable of recording directly to 23.976PsF and 24PsF on HDCAM tape. Steven Sodebergh shooting Full Frontal. ...


  Results from FactBites:
 
Birns and Sawyer, Inc. - Film and Video Camera Sales and Rentals (2859 words)
Is the temporal frame rate, resolution, colorimetry, dynamic contrast range or rather is it that the difference between film and tape is a combination of all of these elements that the resulting imagery can be referred to as "film-like" in nature.
One method for progressive high speed capture would be to transfer all original 60 frames to 35mm film for playback at 24fps which will result in a slow motion sequence.
For example, the 480 Progressive format provides a 50% improvement in vertical resolution when compared to standard interlace formats as well as sharper motion detail as a result of exposing each progressive frame at 1/60 of a second.
Progressive segmented Frame - Wikipedia, the free encyclopedia (281 words)
Each progressive frame is segmented into two interlaced fields without interfield motion, or "combing".
PsF is an alternative to 3:2 pulldown, wherein certain frames are "pulled down" across multiple fields, resulting in output with an irregular frame rate.
When set up correctly, a progressive scan monitor will read these interlaced fields two at a time, and display each pair as a single progressive frame, temporally identical to the source.
  More results at FactBites »

 
 

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