Generation loss

Digital generation loss induced by rotating a JPEG image 90 degrees (from top to bottom) 0, 100, 200, 500, 900, and 2000 times (without using lossless tools)

Generation loss is the loss of quality between subsequent copies or transcodes of data. Compression, as well as up-scaling (with images) or up-sampling (with sound and other recordings) are common causes of generation loss. The introduction of compression artifacts may increase the entropy of the data through each generation. Other causes include signal noise in analog systems and conversion between analog and digital formats.

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