| 摘要 |
When coding user data, it may be desirable to mark user data as invalid. This may arise, by way of example, in applications in which a stored data item needs to be updated by virtue of an updated data item additionally being stored and the old stored data item being marked as invalid. In order to mark the invalidity of a stored data item by means of the value of the data item and to be able to apply an error-recognizing or error-correcting coding dependably, the user data are extended by supplementary data and the coding is applied to the extended user data.
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