Exports the annotations of an emuDB to a TextGrid collection (.TextGrid and .wav file pairs). To avoid naming conflicts and not to loose the session information, the session structure of the database is kept in place (i.e. the TextGrid collection will have sub-folders that are named as the sessions were). Due to the more complex annotation structure modeling capabilities of the EMU-SDMS system, this export routine has to make several compromises on export which can lead to information loss. So use with caution and at own risk as reimporting the exported data will mean that not all information can be recreated! The main compromises are:
If a MANY_TO_MANY relationship between two levels is present and two items from the parent level are linked to a single item on the child level, the concatenated using the '->' symbol. An example would be: the annotation items containing the labels 'd' and 'b' of the parent items are merged into a single annotation item and their labels are Phoneme level are linked to 'db' on the Phonetic level. The generated Phoneme tier then has a segment with the start and end times of the 'db' item and contains the labels 'db' (see for example the bundle 0000_ses/msajc010_bndl of the ae_emuDB).
As annotations can contain gaps (e.g. incomplete hierarchies or orphaned items) and do not have to start at time 0 and be the length of the audio file this export routine pads these gaps with empty segments.
export_TextGridCollection(
emuDBhandle,
targetDir,
sessionPattern = ".*",
bundlePattern = ".*",
attributeDefinitionNames = NULL,
timeRefSegmentLevel = NULL,
verbose = TRUE
)emuDB handle object (see load_emuDB)
directory where the TextGrid collection should be saved
A regular expression pattern matching session names to be exported from the database
A regular expression pattern matching bundle names to be exported from the database
list of names of attributeDefinitions that are to be exported as tiers. If set to NULL (the default) all attribute definitions will be exported as separate tiers.
parameter passed into query function. (set time segment level from which to derive time information. It is only necessary to set this parameter if more than one child level contains time information and the queried parent level is of type ITEM.)
Show progress bars and further information
load_emuDB
if (FALSE) {
##################################
# prerequisite: loaded ae emuDB
# (see ?load_emuDB for more information)
## Export all levels
export_TextGridCollection(ae, "/path/2/targetDir")
}
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