Data compression - definition
Data compression - definition
Data compression is the process of converting information into a form that takes up less space in memory or during transmission, while still being able to reproduce the data in its original or approximate form. The aim of compression is to reduce the volume of data while maintaining its usability, resulting in space savings in storage systems and increased efficiency in the transmission of information over communication links.
Depending on the requirements for data fidelity, there are two basic types of compression: lossless and lossy. Lossless compression allows full restoration of the original data after decompression, without any changes to its content. It is used wherever data integrity is crucial, such as in text documents, executable files, archives, scientific data or the transmission of measurement signals. Lossy compression allows much greater degrees of size reduction at the expense of partial loss of information, usually to the extent that it is invisible or inaudible to the user. It is commonly used in the encoding of images, sound and video, where full conformity to the original is not always necessary.
Compression is based on identifying and eliminating redundancy, i.e. repetitive or predictable data elements, and representing them in a more compact form. Compression techniques can use statistical models, entropy coding, predictive algorithms, signal transforms, and methods for context analysis or spatial and temporal correlations.
In engineering and computer science, data compression is an indispensable element in the design of information, network, multimedia and embedded systems. The effectiveness of a compression algorithm is judged by the degree of reduction, speed of operation and computational complexity, which must be adapted to the specifics of the data and the limitations of the hardware environment. In practice, varying coding strategies are used depending on the type of data, system requirements and available resources.
Transfer Multisort Elektronik (TME) is one of the world’s largest global distributors of electronic components, electrotechnical parts, workshop equipment, and industrial automation. The catalog includes over 1,500,000 products from 1,300 leading manufacturers. TME’s modern logistics centers in Łódź and Rzgów (Poland), with a combined area of over 40,000 m², ship nearly 6,000 packages daily to customers in more than 150 countries.
TME also invests in the development of knowledge and skills of young engineers and electronics enthusiasts through the TME Education project, and supports the tech community by organizing the TechMasterEvent series, promoting innovation and experience exchange.
