összepréselésérl

"Összepréselésérl" is the Hungarian word for "compression". It refers to the process of reducing the size of a data file or object by encoding its information more efficiently. This is achieved by identifying and eliminating redundancy within the data. Compression can be broadly categorized into two types: lossless and lossy.

Lossless compression is used when it is crucial to retain all original data without any loss of fidelity. This method works by finding patterns and repeating sequences in the data and representing them with shorter codes. When the compressed data is decompressed, it can be perfectly reconstructed to its original state. Examples of lossless compression algorithms include ZIP, PNG, and FLAC. This type of compression is ideal for text files, executable programs, and archival purposes where data integrity is paramount.

Lossy compression, on the other hand, achieves higher compression ratios by selectively discarding some information that is considered less important or imperceptible to humans. This method is commonly used for multimedia files like images, audio, and video. While the decompressed data is not identical to the original, the difference is often negligible for human perception. Popular examples of lossy compression formats include JPEG for images, MP3 for audio, and MP4 for video. The trade-off for greater file size reduction is a potential degradation in quality. The choice between lossless and lossy compression depends entirely on the specific application and the acceptable level of data alteration.