- Some amount of data may be lost during the compression process is called compression losses.
- Thus after a compression or decompression cycle, the data set will be modified from the uncompressed original and information may be lost.
- Compression losses is occur using the lossy compression techniques.
- In many cases file or data streams contain more information than is needed for a particular purpose. Developing lossy compression technique you can make it easier for human.
- Lossy compression technique used for pictures and music files that can be trimmed at the edges.
Advantages
Transparency
- Compression losses gives us transparency. Means when a user acquires a lossily compressed file, (for example, to reduce download time) the retrieved file can be quite different from the original at the bit level while being indistinguishable to the human ear or eye for most practical purposes.
Compression ratio
- The compression ratio (that is, the size of the compressed file compared to that of the uncompressed file) of lossy video codecs is nearly always far superior to that of the audio and still-image equivalents.
My notes
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