CCIR System L

Last updated
Analog TV systems global map, with System L in magenta. Analog-TV-Systems.jpg
Analog TV systems global map, with System L in magenta.

CCIR System L is an analog broadcast television system used in France, Luxembourg, Monaco and Chausey. [1] [2] [3] It was the last system to use positive video modulation and AM sound. [3]

Contents

Initially adopted in the 1970s and associated with the SECAM color system (SECAM-L), it was discontinued in 2011, when France transitioned to Digital Video Broadcasting.

Specifications

Spectrum of a SECAM-L color television signal Espectro de SECAM-L.png
Spectrum of a SECAM-L color television signal

The main System L specifications are listed below. [4] [1] [5]

Plan showing VHF frequency ranges for ITU Systems VHF Usage.svg
Plan showing VHF frequency ranges for ITU Systems

Television channels were arranged as follows: [6] [7]

System L VHF channels
ChannelVideo carrier (MHz)Audio carrier (MHz)
147.7541.25
255.7549.25
360.5054.00
463.7557.25
5176.00182.50
6184.00190.50
7192.00198.50
8200.00206.50
9208.00214.50
10216.00222.50
System L UHF channels
ChannelVideo carrier (MHz)Audio carrier (MHz)
21471.25477.75
22479.25485.75
23487.25493.75
24495.25501.75
25503.25509.75
26511.25517.75
27519.25525.75
28527.25533.75
29535.25541.75
30543.25549.75
31551.25557.75
32559.25565.75
33567.25573.75
34575.25581.75
35583.25589.75
36591.25597.75
37599.25605.75
38607.25613.75
39615.25621.75
40623.25629.75
41631.25637.75
42639.25645.75
43647.25653.75
44655.25661.75
45663.25669.75
46671.25677.75
47679.25685.75
48687.25693.75
49695.25701.75
50703.25709.75
51711.25717.75
52719.25725.75
53727.25733.75
54735.25741.75
55743.25749.75
56751.25757.75
57759.25765.75
58767.25773.75
59775.25781.75
60783.25789.75
61791.25797.75
62799.25805.75
63807.25813.75
64815.25821.75
65823.25829.75
66831.25837.75
67839.25845.75
68847.25853.75
69855.25861.75

See also

Notes and references

  1. 1 2 Documents of the XIth Plenary Assembly - Oslo, 1966 - Volume V - Sound Broadcasting Television (PDF). International Telecommunication Union. 1967.
  2. "World Analogue Television Standards and Waveforms". August 30, 2012. Archived from the original on 30 August 2012.
  3. 1 2 "Weltweite Fernsehsysteme (NTSC, PAL und SECAM)". www.paradiso-design.net. 2019. Retrieved 2023-03-06.[ permanent dead link ]
  4. Reference Data for Radio Engineers, ITT Howard W.Sams Co., New York, 1977, section 30
  5. "World Analogue Television Standards and Waveforms". 2007-05-15. Archived from the original on 2007-05-15. Retrieved 2023-04-13.
  6. "CCIR Systems - Radio Channels: System-L - France". www.pembers.freeserve.co.uk. Archived from the original on 30 August 2012. Retrieved 12 January 2022.
  7. "CCIR Systems - Radio Channels: Systems B, D, G, I, K, L 625 lines 7/8MHz, cable distribution, Europe". www.pembers.freeserve.co.uk. Archived from the original on 30 August 2012. Retrieved 12 January 2022.

Related Research Articles

<span class="mw-page-title-main">Analog television</span> Television that uses analog signals

Analog television is the original television technology that uses analog signals to transmit video and audio. In an analog television broadcast, the brightness, colors and sound are represented by amplitude, phase and frequency of an analog signal.

<span class="mw-page-title-main">PAL</span> Colour encoding system for analogue television

Phase Alternating Line (PAL) is a colour encoding system for analog television. It was one of three major analogue colour television standards, the others being NTSC and SECAM. In most countries it was broadcast at 625 lines, 50 fields per second, and associated with CCIR analogue broadcast television systems B, D, G, H, I or K. The articles on analog broadcast television systems further describe frame rates, image resolution, and audio modulation.

Broadcasttelevision systems are the encoding or formatting systems for the transmission and reception of terrestrial television signals.

Near Instantaneous Companded Audio Multiplex (NICAM) is an early form of lossy compression for digital audio. It was originally developed in the early 1970s for point-to-point links within broadcasting networks. In the 1980s, broadcasters began to use NICAM compression for transmissions of stereo TV sound to the public.

The following tables show the frequencies assigned to analog broadcast television channels in various regions of the world, along with the ITU letter designator for the system used. The frequencies shown are for the analog video and audio carriers. The channel itself occupies several megahertz of bandwidth. For example, North American channel 1 occupies the spectrum from 44 to 50 MHz. See Broadcast television systems for a table of signal characteristics, including bandwidth, by ITU letter designator. Analog television broadcasts have been phased out in most regions, having been replaced by digital television broadcasts.

<span class="mw-page-title-main">Multiplexed Analogue Components</span> 1980s analog television standard

Multiplexed Analogue Components (MAC) was an analog television standard where luminance and chrominance components were transmitted separately. This was an evolution from older color TV systems where there was interference between chrominance and luminance.

The 405-line monochrome analogue television broadcasting system was the first fully electronic television system to be used in regular broadcasting. The number of television lines influences the image resolution, or quality of the picture.

<span class="mw-page-title-main">819 line</span> 1940s French analogue high-definition television system

819-line was an analog monochrome TV system developed and used in France as television broadcast resumed after World War II. Transmissions started in 1949 and were active up to 1985, although limited to France, Belgium and Luxembourg. It is associated with CCIR System E and F.

<span class="mw-page-title-main">CCIR System M</span> Analog broadcast television system

CCIR System M, sometimes called 525–line, NTSC, NTSC-M, or CCIR-M, is the analog broadcast television system approved by the FCC for use in the United States since July 1, 1941, replacing the 441-line TV system introduced in 1938. It is also known as EIA standard 170. System M comprises a total of 525 interlaced lines of video, of which 486 contain the image information, at 30 frames per second. Video is amplitude modulated and audio is frequency modulated, with a total bandwidth of 6 MHz for each channel, including a guard band.

<span class="mw-page-title-main">CCIR System B</span> 625-line analog television transmission format

CCIR System B was the 625-line VHF analog broadcast television system which at its peak was adopted by more than one hundred countries, either with PAL or SECAM colour. It is usually associated with CCIR System G for UHF broadcasts.

<span class="mw-page-title-main">625 lines</span> Analog television resolution standard

625-line is a late 1940s European analog standard-definition television resolution standard. It consists of a 625-line raster, with 576 lines carrying the visible image at 25 interlaced frames per second. It was eventually adopted by countries using 50 Hz utility frequency as regular TV broadcasts resumed after World War II. With the introduction of color television in the 1960s, it became associated with the PAL and SECAM analog color systems.

<span class="mw-page-title-main">CCIR System G</span> 625-line analog television transmission format

CCIR System G, also known as the "Gerber Standard", is an analog broadcast television system used in sixty countries around the world for UHF channels. System G is generally associated with System B for VHF.

CCIR System H is an analog broadcast television system used in Belgium, Bosnia and Herzegovina, Croatia, Malta, Slovenia and Liberia on UHF bands, paired with System B on VHF. It was associated with PAL colour.

CCIR System A was the 405-line analog broadcast television system adopted in the UK and Ireland. System A service started in 1936 and was discontinued in 1985.

<span class="mw-page-title-main">CCIR System I</span> 625-line analogue TV transmission format

CCIR System I is an analogue broadcast television system. It was first used in the Republic of Ireland starting in December 1961 as the 625-line broadcasting standard to be used on VHF Band I and Band III, sharing Band III with 405-line System A signals radiated in the north and east of the country. The Republic of Ireland slowly extended its use of System I onto the UHF bands.

CCIR System E is an analog broadcast television system used in France and Monaco, associated with monochrome 819-line high resolution broadcasts. Transmissions started in 1949 and ended in 1985.

<span class="mw-page-title-main">CCIR System N</span> 625-line analog television transmission format

CCIR System N is an analog broadcast television system introduced in 1951 and adopted by Argentina, Paraguay and Uruguay, paired with the PAL color system (PAL-N) since 1980. It was also used briefly in Brazil and Venezuela.

<span class="mw-page-title-main">CCIR System K</span> 625-line analog television transmission format

CCIR System K is an analog broadcast television system used in countries that adopted CCIR System D on VHF, and in Benin, Guinea, Republic of the Congo, Togo, Senegal, Burkina Faso, Burundi, Ivory Coast, Gabon, Comoros, Democratic Republic of the Congo, Madagascar, Mali, Nigeria, Réunion, Rwanda, Chad, Central African Republic, French Polynesia, New Caledonia, Wallis and Futuna, Guadeloupe, Martinique, Saint Pierre and Miquelon and French Guiana.

<span class="mw-page-title-main">CCIR System D</span> 625-line analog television transmission format

CCIR System D is an analog broadcast television system used in Bulgaria, Latvia, Lithuania, Poland, Romania, Slovakia, Czech Republic, Hungary, Albania and the People's Republic of China, Mongolia, Kyrgyzstan, North Korea, Tajikistan, Turkmenistan, Uzbekistan, Armenia, Azerbaijan, Georgia, Kazakhstan, Moldova, Russia, Ukraine and Belarus paired with the PAL/SECAM colour.

CCIR System C is an analog broadcast television system used between 1953 and 1978 in Belgium, Italy, Netherlands and Luxembourg as a compromise between Systems B and L. Used on VHF only.