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EBU colour bars
The EBU colour bars are a television test card used to check if a video signal has been altered by recording or transmission, and what adjustments must be made to bring it back to specification. It is also used for setting a television monitor or receiver to reproduce chrominance and luminance information correctly. The EBU bars are most commonly shown arranged side-by-side in a vertical manner (as in the images in this article), though some broadcasters – such as TVP in Poland, and Gabon Télévision in Gabon – were known to have aired a horizontal version of the EBU bars.
It is similar to the SMPTE color bars, although that pattern is typically associated with the NTSC analogue colour TV system. Many test cards, such as Philips PM5544 or Telefunken FuBK, feature elements equivalent to the EBU colour bars.
The 75% Colour Bars or EBU/IBA 100/0/75/0 Colour Bars pattern is very similar to the SMPTE colour bars pattern, although it only features seven colour bars, and the white bar is at 100% intensity.
There is a variant where the white bar is also at 75% intensity (EBU 75/0/75/0). This pattern is generated by certain types of test equipment – including the Philips PM5519.
The signal values of these bars for the PAL analogue system are:
Displayed colours are converted from the original PAL BT.601 colour space to sRGB – the colour space used on web pages. They are only approximate, giving a notion of how the bars would look on a calibrated PAL display.
An alternate form of colour bars is the 100% Colour Bars or EBU 100/0/100/0 Colour Bars pattern (specified in ITU-R Rec. BT.1729), also known as the RGB pattern or full field bars, which consists of eight vertical bars of 100% intensity, and does not include the castellation or luminance patterns. Like the SMPTE colour bars pattern, the colour order is white, yellow, cyan, green, magenta, red, and blue – but with an additional column of saturated black. This pattern is used to check peak colour levels, and colour saturation, as well as colour alignment. The 100% pattern is not as common as the SMPTE bars, or the above-mentioned EBU 75% pattern, but many pieces of test equipment can be selected to generate either one. Many professional cameras can be set to generate a 100% pattern for calibration of broadcast or recording equipment, especially in a multi-camera installation where all camera signals must match.
EBU colour bar values for standard-definition television systems following BT.601, as specified in ITU-R Rec. BT.1729:
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EBU colour bars
The EBU colour bars are a television test card used to check if a video signal has been altered by recording or transmission, and what adjustments must be made to bring it back to specification. It is also used for setting a television monitor or receiver to reproduce chrominance and luminance information correctly. The EBU bars are most commonly shown arranged side-by-side in a vertical manner (as in the images in this article), though some broadcasters – such as TVP in Poland, and Gabon Télévision in Gabon – were known to have aired a horizontal version of the EBU bars.
It is similar to the SMPTE color bars, although that pattern is typically associated with the NTSC analogue colour TV system. Many test cards, such as Philips PM5544 or Telefunken FuBK, feature elements equivalent to the EBU colour bars.
The 75% Colour Bars or EBU/IBA 100/0/75/0 Colour Bars pattern is very similar to the SMPTE colour bars pattern, although it only features seven colour bars, and the white bar is at 100% intensity.
There is a variant where the white bar is also at 75% intensity (EBU 75/0/75/0). This pattern is generated by certain types of test equipment – including the Philips PM5519.
The signal values of these bars for the PAL analogue system are:
Displayed colours are converted from the original PAL BT.601 colour space to sRGB – the colour space used on web pages. They are only approximate, giving a notion of how the bars would look on a calibrated PAL display.
An alternate form of colour bars is the 100% Colour Bars or EBU 100/0/100/0 Colour Bars pattern (specified in ITU-R Rec. BT.1729), also known as the RGB pattern or full field bars, which consists of eight vertical bars of 100% intensity, and does not include the castellation or luminance patterns. Like the SMPTE colour bars pattern, the colour order is white, yellow, cyan, green, magenta, red, and blue – but with an additional column of saturated black. This pattern is used to check peak colour levels, and colour saturation, as well as colour alignment. The 100% pattern is not as common as the SMPTE bars, or the above-mentioned EBU 75% pattern, but many pieces of test equipment can be selected to generate either one. Many professional cameras can be set to generate a 100% pattern for calibration of broadcast or recording equipment, especially in a multi-camera installation where all camera signals must match.
EBU colour bar values for standard-definition television systems following BT.601, as specified in ITU-R Rec. BT.1729: