1. Video signal digitization
Digitizing any signal involves first – and then, after filtering to avoid spectrum aliasing –, sampling it.
These analog samples are then quantized on a number of levels, giving a parallel n-bit bitstream. For ease of transport, this is followed by a serialization step, enabling us to return to coaxial cable as in analog.
Digitizing a video signal imposes additional constraints due to its three-dimensional aspect. The signal must be sampled and quantified, and a sampling structure chosen that takes into account both the spatial and temporal aspects of the image.
Let's recall some of the characteristics of the video signal. We live in a four-dimensional space, with three spatial dimensions and one temporal dimension. With the advent of television, one spatial dimension disappeared, as the camera lens projects reality...
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Video signal digitization
Quantification
Bibliography
References
Recommendations
ITU-R BT 601-5 Oct. 1995 Digital television studio coding parameters for standard 4:3 (normalized) and 16:9 (widescreen) aspect ratios
ITU-R BT 656-4 Feb. 1998 Interface for digital component video signals in 525-line and 625-line television systems operating at the 4:2:2 level of Recommendation ITU-R BT 601 (Part A)
ITU-R BT 799-3 Feb. 1998 Interface for digital component...
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International Telecommunication Union - Radiocommunication Sector ITU-R http://www.itu.int/ITU-R/index-fr.html
European Broadcasting Union EBU
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Thomson Broadcast http://www.thomsonbroadcast.com
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