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“Lossless”

“Lossless”: (See “Compression”) Data compression method that utilizes an algorithm that compacts data into a smaller sized data package and enables the identical restoration of original quality. This compression method is less common for digital audio and video because it yields greater file sizes. As digital preservation becomes more vital, the need for greater adoption of lossless compression methods for digital audio and video grows increasingly important. There are several “lossless” audio compression codecs available including FLAC (Free Lossless Audio Codec) and the Apple Lossless Audio Codec (ALE/ALAC), however, at this time, most audio recorders do not include them as a recording option. This is not as important for digital audio since the file sizes for digital video are relatively small. Digital video, however, is in great need. One such standard that utilizes lossless compression in the JPEG2000 lossless format wrapped in a MXF container. Lossless compression is attractive from a long-term preservation standpoint as it decreases data sizes without degrading quality. [ Audio Glossary ] [ Video Glossary ]

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