how to choose the compressed format for RFC3095 IP extension's SN

Jer-ming Lin <[email protected]> Sat, 4 Sep 2010 14:17:54 +0800
Newsgroups gmane.ietf.rohc
Message-ID <[email protected]>
Dear rohcers,

    In RFC 3095 5.8.5.1, I can not figure how to decide the format of
compressed XX Sequence Numbers out. Or it just compares with the old
XX SNs in the window. If all have same 25 MSBs with the new SN, it is
the 0. In the other hand, if all have same 1 MSBs, it is the 1 format.
Is that right?

Best regards,
Jer-ming Lin