Hello,
i wanna ask about the suitable compression method for a text file that has a 50*50 input message and has a source alphabet (0,1,2,3), is it extended huffmann or LZW or Arithmatic or shall i mix between 2 of them ?

regards

It seems you know the names, but not the uses/purposes of these compression algorithms. The title implies that you need lossless compression for multimedia files, but your text indicates that you are looking for text compression. What is it? These are two very different purposes.