ECG Database Programmer's Guide - Applications Go to the first , previous , next , last section, table of contents . Such a program allows the user to select any portion of the signals for display at various scales, and to add, delete, or correct annotations.
Similar programs perform sampling frequency conversion.
If the reference annotations supplied with the database are compared in this way with annotations produced using an analysis program, this comparison is a means of establishing the accuracy of the analysis program's output. The DB library provides the means for programs such as those described above to select a database record, read and write signals, read and write annotations, jump to arbitrary points in the record, and determine attributes of the signals such as the sampling frequency. The library also provides a variety of other more specialized services for programs that need them.