Data compression error

  • What are 2 reasons for data compression?

    The main advantages of compression are reductions in storage hardware, data transmission time, and communication bandwidth.
    This can result in significant cost savings.
    Compressed files require significantly less storage capacity than uncompressed files, meaning a significant decrease in expenses for storage..

As the data is compressed more, error propagation through the transmission channel increases. When this data is decoded, it will bear no resemblance to the original data being transmitted. To reduce error propagation, it is necessary that the data is not compressed to a great extent.
– compression adapts to properties of particular input. – algorithm is independent of nature of input. • dictionary is included in the compressed data.

Analysis of compression artifacts in digital data with lossy compression

Error level analysis (ELA) is the analysis of compression artifacts in digital data with lossy compression such as JPEG.

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