Prores 4:2:2...

The 4:2:2 describes the number of bits used for sampling as in 4 Luma, 2 CbCr, 2 CbCr for a total of 8 bits. Yet ProRes is stated to support 10 bits.

Where are the missing bits? Or are the 10 bits attributed to something else entirely?

4:2:2 is the video oversample rate of the format.

A 13 Mhz carrier sample is sampled at 4x of that rate, then Cb-Luminance is sampled at 2x and Cr -Chrominance is also sampled at 2x.

In DV that color space is 4:1:1 and HDV it is 4:2:0

You can have either 8 or 10 bit 4:2:2.

Ahhhh OK - so it's not a bit rate at all. So by your explanation, 4:2:2 is sampled at 52Mhz, 26Mhz, 26Mhz respectively - That about right?

Correct me if I'm wrong, it's been a while since I had this theory, but the sample rate for CCIR 601 is 13,5 MHz, and the sampling numbers means 4:2:2 is sampled at 13,5MHz:6,75MHz:6,75MHz. 4:1:1 would be 13,5MHz:3,375MHz:3,375MHz.

8 bit means that for every sample you can pinpoint the analog value to 1/256 accuracy. With 10 bit you've got 1/1024 accuracy.

Geir.