Hi,
In principle, if you want to recover any clock from any data stream then you better force your data to be at a fixed rate.
So if your data is bursty, make it fixed rate by inserting false(dummy bits).
You will then need to recover one clock(at the fixed rate) and declare your lock state with celebration, the overhead cost is the data valid arrangement and that all data trnsmitted in the link must be sampled on the highest rate. This is cheaper than having to recover the clock on variable rate(which is not practical anyway, you will have to lock and relock).
This is what the previous serdes description was all about. As to meaning of bursty, I believe I understand it. I have lived so far a decade on bursty vdeo data.
kaz