What does self extracting mean in Winrar

That is, the compressed file is an exe file, and there is no need to decompress the software when decompressing.

Decompression means restoring a document, file, and various other things that have been compressed by software to the way they were before compression.

For many reasons, some files need to be compressed in daily life. Compression can reduce the size of the file, and the file that cannot be accommodated by a floppy disk or U disk can be accommodated after compression. More often than not, it is necessary to compress the file to make it smaller to facilitate network transfer.

Compressing files requires specific compression software.

The compressed file is compressed into a package, and unpacking the package is called an unzipped file. Decompression is the reverse process of compression. After the decompression is completed, a new file will appear in the directory where the compressed file is located, and this file is the unzipped file.

Lossless compression and lossy compression

Lossless compression: After compression and decompression, the data content is exactly the same as before compression. Text, **, and numeric data files must be losslessly compressed.

Generally, the normal file size can be compressed to 25 to 50% of the original; Commonly used lossless compression algorithms include Huffman coding and LZW algorithm.

Lossy compression: The data after compression and decompression is not exactly the same as the original data before compression, but it does not affect the data compression technology that causes misunderstanding of the information expressed in the original data. Television and sound files often contain redundant information, and the actual content is more than the information presented to the audience and listeners, so this information can be removed by lossy compression methods, and the data is reduced to 5% after compression.

Decompression, that is, decompression, is the reverse process of compression, which is to restore a document, file, and other things compressed by software to the way they were before compression.

If the compression scheme is chosen correctly, you won't notice any changes, but the file size will decrease significantly. Of course, with lossy compression, you can't revert a file back to the way it was after it's compressed. You must accept the reinterpretation of the original file by the compressor.

So, if you need to completely reproduce the original content (e.g. software application.

databases and inaugural speeches), this form of compression should not be used.

How to extract the winrar file:

1. Find the file that needs to be extracted in the computer folder and select the file.

2. Right-click and click the "Extract to Current Folder" option in the context menu.

3. In this way, the ruler touch file is decompressed to the current position.

In addition, right-click to find the compressed file and select "Extract to Folder" in the pop-up menu. Extract the file into a new folder, the name of the folder is the name of the zip file, when there are many files in the compressed file, you can use this command to be stupid.