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Chroma sampling

4:2:2 sampling is used in ITU-R BT601, D-1, D-5, Ampex DCT, Digital Betacam, Digital-S, and DVCPRO50 formats. 4:1:1 sampling is used in 525/59.94 ("NTSC") DV and DVCAM, and in both 525/59.94 and 625/50 ("PAL") DVCPRO.

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Chroma sampling

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  1. 4:2:2 sampling is used in ITU-R BT601, D-1, D-5, Ampex DCT, Digital Betacam, Digital-S, and DVCPRO50 formats. 4:1:1 sampling is used in 525/59.94 ("NTSC") DV and DVCAM, and in both 525/59.94 and 625/50 ("PAL") DVCPRO. 4:2:0 (co-sited) sampling is used in 625/50 ("PAL") DV and DVCAM formats. Cr and Cb samples are on alternate lines in each field (a frame view would show two lines of YCr,Y pairs, then two lines of YCb,Y pairs). Note that this is different from the 4:2:0 chroma sample positioning in JPEG, MPEG, and H.261 formats!

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