Comparative Study of Performances in Lossless Data Compression for English and Romanian Text Files Using the Q-Coder

In order to achieve the best and most relevant performance in the field of lossless data compression, but also in order to deepen and refine the results obtained by the type of data to which the compression and decompression operation is applied, this work focuses on compression using the Q-coder, which is a relatively new and less-used coder than the QM-coder, which largely uses the same principles, except that the QM -coder is better known, being mainly used in the JPEG standard. Based on coding and decoding principles using the Q-Coder, its compression performances are compared with other similar compression methods, techniques and algorithms by applying compression to text files in both English and Romanian languages but also on other types of data (images) that allow efficient storage of information in the memory of desktop, mobile or portable computing systems. The experimental results obtained for the compression performance differ significantly depending on the inner characteristics and statistical particularities of each studied natural language. The article interprets these comparative tests and highlights the subsequent differences in compression performance, providing useful conclusions and recommendations, which can be extended to texts from different other natural languages.