Sometimes we need to send files of large sizes( especially those that contain images or videos) as email attachments, send files across computer networks, or upload and download documents from websites. Owing to the enormous size of the files it becomes difficult to do any of these tasks. This is because the time taken, when the files have large size, is great. Working with them is really inconvenient and frustrating. It is file compression tool that we must turn to rid ourselves of this problem.
What is file compression?
File compression tools compress the files, thereby reducing its size, without affecting the content. As a result the same file can be stored more easily, occupying much less space. For the successful working of file compression tools it is imperative that the compression tool is accessible to both the sender and the receiver. Otherwise the compressed file cannot be decompressed and viewed at the receiving end.
Methods used in compressing files
There are numerous file compression methods. For compressing jpeg files PDF (portable document format) compression is used. Batch file compression is used to compress a number of files or documents at the same time, such as in big organizations. Conversion of a file in one format into a file of some other format is also possible with the help of file compression tools. This means that a file in PDF format can be converted into batch document format and vice versa.
How file compression tool works
The computer files are coded in such a way that there are spaces left between the coded segments, which leads to the large size of files. In addition the same information in the documents is repeated throughout the file which causes redundancy. Files are compressed by file compression tools through the replacement of multiple instances of occurrence of data with a single instance. In order to enable reconstruction of the original document a reference to the removed instances is inserted in the document.