Dario showed  a  lossless  compression based  on  the  Hofman
coding. There  was a discussion on  the performance of  the code. The
important question is  how fast will be the  decoding, because the HLT
needs decompressed data  to work. A similar investigation  was done in
the Bergen group, and the results  were published. A FPGA chip will do
the coding  in the  on-line.  The  present work was  done in  order to
provide a realistic data source for the data challenges.