567-line television system

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An experimental broadcast, and a proposal by Philips of the Netherlands, was a 567 line television system for Europe, running at 50 fields (25 frames) per second.[1]

Most of the technology was to be borrowed from NTSC, the difference from NTSC being the reducing of the horizontal scan frequency from 15750 to 14175 Hz.[2]

This would have meant that the NTSC sound carrier frequency of 4.5 MHz above the picture carrier, would have also been the standard for Europe, and hence been a lot more common world wide.

System Lines Frame rate Channel bandwidth (in MHz) Visual bandwidth (in MHz) Sound offset Vestigial sideband Vision mod. Sound mod Aspect ratio Effective resolution (4:3).
567 Line 567 25 6 4.2 +4.5 LSB cut @ -0.75 MHz Neg. FM 4:3 740 x 485 (theoretical)

The proposal was defeated as Russian engineers had already shown how NTSC could be easily adapted to a higher resolution by breaking with NTSC bandwidth restrictions, and moving the sound carrier up 2 MHz from 4.5 to 6.5 MHz, along with 625 line scanning.

References[edit]

  1. ^ "Philips Netherland 567 line TV Standard" (in German). Radiomuseum.org. Retrieved 2011-06-20.
  2. ^ "Philips 567 Zeilen Standard - The Philips 576 line TV system". Scheida.at. 1951-10-02. Retrieved 2011-06-20.