EMI Filtering on LVDS lines
In general the the ferrite beads and common mode filters are used to suppress conducted and radiated EMI. This suppression is usually needed to meet radiated EMI specifications. 

The goal is to suppress harmonics while passing the fundamental frequency. 

Murata has an application note that discusses this without getting into to much math.

see here -> http://www.murata.com/products/catalog/pdf/c35e.pdf

Hope this helps, if you still need this info.

Waltx