Description: Several studies have been performed to analyze data compression in telecommunication systems. A method of test data forming (generation) which are large alphabet which corresponds to the transmitted multimedia information in modern telecommunication networks is proposed. Test sequences with different sizes of alphabet with can accurately calculating theoretically achievable compression ratio was generated. The compressed ratio of new modern archivers was analyzed. A method of forming test samples has been improved order to studied efficiency archiver compression ratio depends only on its ability to work with a data with large alphabets. It is shown for all archivers by increasing the size of the alphabet the its performance is decreased.
Keywords: data compression, test data compression, analytical models, lossless compression, large alphabets