567 Line television
Encyclopedia
An experimental broadcast, and a proposal by Philips
of Holland, was a 567 line television
system for Europe, running at 50 fields (25 frames) per second.
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.
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.
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.
Philips
Koninklijke Philips Electronics N.V. , more commonly known as Philips, is a multinational Dutch electronics company....
of Holland, was a 567 line television
system for Europe, running at 50 fields (25 frames) per second.
Most of the technology was to be borrowed from NTSC
NTSC
NTSC, named for the National Television System Committee, is the analog television system that is used in most of North America, most of South America , Burma, South Korea, Taiwan, Japan, the Philippines, and some Pacific island nations and territories .Most countries using the NTSC standard, as...
, the difference from NTSC being the
reducing of the horizontal scan frequency from 15750 to 14175 Hz.
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.