SCART (péritel) - All about

analog audio/video connection
analog audio/video connection

SCART ( or péritel)

SCART refers to a coupling device and an audio/video connector that has been mainly used in Europe.

It allows you to simply plug in peripherals (TV) that have analog audio/video functions using a 21-pin connector.

There are three types of connectors : the plug on the devices, the male/male cord and the extension cord.
SCART connectors are more often encountered (péritel) on equipment marketed in Europe.

Today analogue television is being replaced by digital television; it allows access to high definition; SCART (péritel) which was therefore mandatory on televisions since 1980, is replaced by HDMI
HDMI
HDMI is a fully digital audio/video interface that transmits uncompressed encrypted streams. HDMI is used to connect an audio/video source (DVD player, Blu-ray player, computer or game console) to a high-definition TV.
HDMI supports all video formats, including standard, improved, high-definition definition and multichannel sound. HDMI encapsulanses video data by TMDS. Initially, the maximum HDMI transmission tau w
. The scart no longer exists since the end of 2014.
The SCART plug (péritel)  has 21 pins and transmits analog signals.
The SCART plug (péritel) has 21 pins and transmits analog signals.

Cabling

Pin 8 exploits the slow switching signal from the source, which switches the video input as well as the type of video signals to be used :

- 0 V means "no signal", or internal signal (example : current operation of the TV);
- +6 V means : selection of the auxiliary audio/video input and 16 : 9 aspect ratio (technical evolution after the original standard);
- +12 V means : selection of auxiliary audio/video input and 4/3 format.

Pin 16 is a signal from the source, which indicates whether the signal is RGB or composite :
- 0 V to 0.4 V composite;
- 1 V to 3 V (nominal 1 V peak) RGB only.
Pin 16 is called fast switching :
It can be used to embed the RGB signal within another video signal : Teletext and captioning.
The video bandwidth allowed on fast switching is 6 MHz.
1 A-O-R RIGHT AUDIO OUTPUT
2 A-I-R RIGHT AUDIO INPUT
3 A-O-L LEFT AUDIO OUTPUT
4 A-GND GND AUDIO
5 B-GND BLUE - MASS
6 A-I-L AUDIO LEFT INPUT
7 B BLUE HD INPUT / OUTPUT
8 SWITCH SLOW SWITCHING (INPUT/EXTERNAL SOURCE)
9 GND GREEN
10 CLK-OUT ENTRANCE
11 GND GREEN HD INPUT/OUTPUT
12 DATA OUTPUT, INPUT/OUTPUT VERTICAL HD SYNCHRONIZATION
13 R GND RED / CHROMINANCE, MASS
14 DATA-GND MASS
15 R RED/ CHROMINANCE (YC), HD INPUT/OUTPUT
16 BLNK FAST SWITCHING
17 V-GND VIDEO / SYNCHRO / LUMINANCE, GROUND
18 EMPTY-GND GND VOID
19 V-OUT VIDEO / SYNCHRO / LUMINANCE OUTPUT
20 V-IN VIDEO / SYNCHRO / LUMINANCE INPUT
21 ARMORED COMMON GND ( SHIELDING )

The SCART plug is the most common on older TVs
The SCART plug is the most common on older TVs

Limitations of the SCART socket (péritel)

The use of this plug is only of interest for screens that can be satisfied with a low definition (about 800 × 600).
For higher definition displays, it is useful for connecting all products without an HDMI
HDMI
HDMI is a fully digital audio/video interface that transmits uncompressed encrypted streams. HDMI is used to connect an audio/video source (DVD player, Blu-ray player, computer or game console) to a high-definition TV.
HDMI supports all video formats, including standard, improved, high-definition definition and multichannel sound. HDMI encapsulanses video data by TMDS. Initially, the maximum HDMI transmission tau w
jack (e.g. an analog VCR, VHS type).
For high-definition digital devices, it is necessary to check that they have an HDMI
HDMI
HDMI is a fully digital audio/video interface that transmits uncompressed encrypted streams. HDMI is used to connect an audio/video source (DVD player, Blu-ray player, computer or game console) to a high-definition TV.
HDMI supports all video formats, including standard, improved, high-definition definition and multichannel sound. HDMI encapsulanses video data by TMDS. Initially, the maximum HDMI transmission tau w
output (DVD player, game console with disc player, digital receiver), because the connection by SCART (péritel) leads to losses :

Beyond three meters, an extender cord cannot effectively convey the weak and multiple analog signals it operates without disturbances occurring.
Without specific treatment (video amplifier, audio filter) therefore non-compliance with the original standard, longer links are not recommended.

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