180 lines
Encyclopedia
180 lines is an early electronic television system. It was used in Germany after on March 22, 1935, using telecine
transmission of film, intermediate film system
, or cameras using the Nipkow disk
. Transmissions using cameras based on the iconoscope
began on January 15, 1936.
The Berlin
Summer Olympic Games
were televised, using both fully electronic iconoscope-based cameras and intermediate film cameras, to Berlin
and Hamburg
in August 1936. Twenty-eight public television rooms were opened for anybody who did not own a television set. After February 1937 this system was replaced by a superior 441 lines
system.
Telecine
Telecine is transferring motion picture film into video and is performed in a color suite. The term is also used to refer to the equipment used in the post-production process....
transmission of film, intermediate film system
Intermediate film system
The intermediate film system was a television process in which motion picture film was processed almost immediately after it was exposed in a camera, then scanned by a television scanner, and transmitted over the air...
, or cameras using the Nipkow disk
Nipkow disk
A Nipkow disk , also known as scanning disk, is a mechanical, geometrically operating image scanning device, invented by Paul Gottlieb Nipkow...
. Transmissions using cameras based on the iconoscope
Iconoscope
The Iconoscope was the name given to an early television camera tube in which a beam of high-velocity electrons scans a mosaic of photoemissive isolated granules...
began on January 15, 1936.
The Berlin
Berlin
Berlin is the capital city of Germany and is one of the 16 states of Germany. With a population of 3.45 million people, Berlin is Germany's largest city. It is the second most populous city proper and the seventh most populous urban area in the European Union...
Summer Olympic Games
Summer Olympic Games
The Summer Olympic Games or the Games of the Olympiad are an international multi-sport event, occurring every four years, organized by the International Olympic Committee. Medals are awarded in each event, with gold medals for first place, silver for second and bronze for third, a tradition that...
were televised, using both fully electronic iconoscope-based cameras and intermediate film cameras, to Berlin
Berlin
Berlin is the capital city of Germany and is one of the 16 states of Germany. With a population of 3.45 million people, Berlin is Germany's largest city. It is the second most populous city proper and the seventh most populous urban area in the European Union...
and Hamburg
Hamburg
-History:The first historic name for the city was, according to Claudius Ptolemy's reports, Treva.But the city takes its modern name, Hamburg, from the first permanent building on the site, a castle whose construction was ordered by the Emperor Charlemagne in AD 808...
in August 1936. Twenty-eight public television rooms were opened for anybody who did not own a television set. After February 1937 this system was replaced by a superior 441 lines
441 lines
441 lines, or 383i if named using modern standard, is an early electronic television system. It was used with 50 interlaced frames per second in France and Germany, where it was an improvement over the previous 180 lines system...
system.
| System | Field frequency | Active picture | Field blanking | No. of broad pulses | Broad pulse width | Line frequency | Front porch | Line sync | Back porch | Active line time | Video/syncs ratio |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 180 lines | 25 Hz | 169 lines | 11 lines | 1 per field | 200 µs | 4500 Hz | 2.2 µs | 20.0 µs | 2.2 µs | 197.8 µs | 75/25 |
External links
- http://www.compulink.co.uk/~rrussell/tccgen/manual/tcgen0.html