decompress

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decompress

(compression, data)
To reverse the effects of data compression.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

decompress

To restore compressed data back to their original size. Decompressing is also called "unarchiving." See data compression and archive.
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References in periodicals archive ?
The pressure in the brain is measured continuously and more fluid is drained out than flowed in so the brain slowly decompresses.
While the first example above requires that a user double-click a file twice (if auto-execution of "safe" files is turned off), in the second case, users may go to a website where they expect to download legitimate files (then decompresses the archive and expects the resulting file (an image, video or application) to be a graphic or application.
In output mode, it receives one or two JPEG 2000 data streams via the 64-bit, 66 MHz PCI bus, decompresses the data streams and outputs the resulting one or two independent PAL or NTSC video output signals via the 20-way MDR sockets located on the board's front panel.