CCIR System C (originally known as the Belgian 625-line system) is an analog broadcast television system1 used between 1953 and 19782 in Belgium, Italy, Netherlands, and Luxembourg. Used on VHF only.3
Specifications
Some of the important specifications for System C are listed below:4315
- Frame rate: 25 Hz
- Interlace: 2/1
- Field rate: 50 Hz
- Lines/frame: 625
- Line rate: 15.625 kHz
- Visual bandwidth: 5 MHz
- Vision modulation: Positive
- Preemphasis: 50 μs
- Sound modulation: AM
- Sound offset: +5.5 MHz
- Channel bandwidth: 7 MHz
- Assumed display device gamma: 2.0
Television channels were arranged as follows:2
| Channel | Video carrier (MHz) | Audio carrier (MHz) |
|---|---|---|
| 1 | 41.25 | 46.75 |
| 1A | 42.25 | 47.75 |
| 2 | 48.25 | 53.75 |
| 2A | 49.75 | 55.25 |
| 3 | 55.25 | 60.75 |
| 4 | 62.25 | 67.75 |
| 4A | 82.25 | 87.75 |
| 5 | 175.25 | 180.75 |
| 6 | 182.25 | 187.75 |
| 7 | 189.25 | 194.75 |
| 8 | 196.25 | 201.75 |
| 9 | 203.25 | 208.75 |
| 10 | 210.25 | 215.75 |
| 11 | 217.25 | 222.75 |
| 12 | 224.25 | 229.75 |
See also
See also
Notes and references
- Documents of the XIth Plenary Assembly - Oslo, 1966 - Volume V - Sound Broadcasting Television (PDF). International Telecommunication Union. 1967.
- "World Analogue Television Standards and Waveforms". 30 August 2012. Archived from the original on 30 August 2012.
- "World Analogue Television Standards and Waveforms". 30 August 2012. Archived from the original on 30 August 2012.
- Reference Data for Radio Engineers, ITT Howard W.Sams Co., New York, 1977, section 30
- "C.C.I.R. Report 624-4 Characteristics of television systems, 1990" (PDF).