Multimedia files require huge amounts of storage space. For example, an average-sized hard disk could store only a dozen audio CDs, and there would not be much room left for system software or application. For that reason sometimes we need to compress and decompress multimedia files. Let’s know in detail about what is compression and decompression algorithm of multimedia files.
To reduce the size of multimedia files, most software uses comparison/decompression algorithms.
There are two approaches for compression, called
- Lossless compression and
- Lossy compression
In lossless compression: The original file is compressed so that it can be completely restored, without flaw, when decompression occurs.
In lossy compression: The original file is compressed so that it can be completely restored, without flaw, when decompression occurs. In lossy compression, the original file is processed so that some information is permanently removed.
However, users probably cannot notice the loss. Lossy compression techniques eliminate information that is not perceived when people see pictures or hear sounds.
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