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extremely high-resolution imagery (UHDTV) (EHRI)

Extremely High-Resolution Imageries (EHRI) are high-resolution images. The International Telecommunication Union( ITU-R) has divided and specified the EHRI resolutions into several resolution variants in its recommendation BT.2042.

According to the ITU-R recommendations, all EHRI variants have an aspect ratio of 16:9 and are based on the resolution of 1,920 x 1,080, which corresponds to EHRI-0 and is used in high-definition television( HDTV). They form a multiple of this base value in the vertical and horizontal directions.

The different versions of EHRI specified in BT.2053.

The different versions of EHRI specified in BT.2053

Two versions are used in Ultra-HDTV, namely EHRI-1 with a resolution of 3,840 x 2,160, which corresponds to the 4K standard, and EHRI-3 with 7,680 x 4,320, which corresponds to the 8K standard. The resolution of EHRI-1 is twice that of EHRI-0, and that of EHRI-3 is even four times that of EHRI-0. The pixel count of EHRI-1 is thus four times that of EGRI-0, and that of EHRI-3 is even 16 times that.

Englisch: extremely high-resolution imagery (UHDTV) - EHRI
Updated at: 09.03.2020
#Words: 150
Links: resolution, international telecommunication union (ITU), burst tolerance (ATM) (BT), aspect, television (TV)
Translations: DE

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