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“Lossy”

“Lossy”: (See “Compression”) Data compression method that utilizes an algorithm that compacts data into a smaller sized data package. This compression method is more common for digital audio and video because it yields much smaller file sizes. However, this method inherently degrades the original quality. Certain compression codecs such as H.264 and MPEG-3 have become quite efficient enabling much smaller file sizes with a lower perception of loss be it audible or visual. Traditionally, lossy compression has been ideal in an access environment because of the small file sizes. However, because of the degradation in quality that results from lossy compression, it is not ideal in a preservation environment. I do not recommend lossy compression for recording or preservation digital audio, however it is difficult to avoid for digital video, even in a preservation environment. [ Audio Glossary ] [ Video Glossary ]

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