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Digital archival and exchange of events in a simple format for polygraphic recordings with application in event related potential studies.

Digital archival and exchange of events in a simple format for polygraphic recordings with application in event related potential studies.

Authors: 
van de Velde M., van den Berg-Lenssen M.M., van Boxtel G.J., Cluitmans P.J., Kemp B., Gade J., Thomsen C.E. & Varri A.
Year: 
1998
Journal: 
Electroencephalography Clinical Neurophysiology
Abstract: 

This paper describes a simple method of event encoding as an extension to a previously defined standardformat, the European Data Format (EDF). The specification ensures full backward compatibility with the existing definition. By using this extension, the format can be used to store both continuous recordings and selected epochs of recordings. The encoding is performed in a channel of event-codes or in a pseudo-channel for annotations. Standardisation of event encoding is discussed. Decoding of events or annotations from the extended format is implemented at the application level. Existing programs that do not support the new encoding scheme still operate correctly and can simply ignore the new channels in processing `extended' data files. The event encoding is also compatible with EDF's capability to encode channels of different sampling frequency.

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