[Info-vax] my first question

[lin]

hi friend...am new to this group....currently am doing Mtech in MIT,
chennai. I want to know details regarding compression technique for my
final year project......

my question:

       1,  I want to know available content based compression
technique, presently?
                content based in the sense...want to consider text,
numeric and special characters as separate.......not audio and
video....