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acknowledgements for ansi/nist-itl 1-2011 - NIST Visual Image ...

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ANSI/<strong>NIST</strong>-ITL 1-<strong>2011</strong> - UPDATE 2013 DRAFT VERSIONooused to enter the make, model and serial number of the analog to digitalconversion equipment used, if known. This field should also addressparameters used, such as the sampling rate, if known. Additionalin<strong>for</strong>maion about the digital conversion process can be contained in Field11.902: Annotation in<strong>for</strong>mation / ANN.The third in<strong>for</strong>mation item is mandatory if the AQT is 23 or 24. It is a textfield, radio transmission <strong>for</strong>mat description / FDN. It is optional <strong>for</strong>other radio transmission codes.The fourth in<strong>for</strong>mation item is optional. It is a free text field, acquisitionspecial characteristics / AQSC that is used to describe any specificconditions not mentioned in Table 101 Acquisition source.8.11.9 Field 11.009: Record creation date / RCDThis mandatory field shall contain the date and time of creation of this Type-11 record.This date will generally be different from the voice recording creation date and may bedifferent from the date at which the acoustic vocalization originally occurred. SeeSection 7.7.2.4 Local date & time <strong>for</strong> details.8.11.10 Field 11.010: Voice recording creation date / VRDThis optional field shall contain the date and time of creation of the voice recordingcontained in the record. If pre-recorded or transcoded materials were used, this datemay be different from the date at which the acoustic vocalization originally occurred.See Section 7.7.2.4 Local date & time <strong>for</strong> details.8.11.11 Field 11.011: Total recording duration / TRDThis field is optional and gives the total length of the voice recording in time,compressed bytes and total digital samples. At least one of the three in<strong>for</strong>mation itemsmust be entered if this field is used. The second and third items of this field only applyto digital audio objects, as indicated by a value of 0, 1 or 2 in Field 11.003: Audioobject descriptor code /AOD.oooThe first in<strong>for</strong>mation item (voice recording time / TIM) is optional and givesthe total time of the voice recording in microseconds. The size of this item islimited to 11 digits, limiting the total time duration of the signal to 99,999seconds, which is approximately 28 hours.The second in<strong>for</strong>mation item (compressed bytes / CBY) is optional and givesthe total number of compressed bytes in the digital voice data file.Consequently, this in<strong>for</strong>mation item applies only to digital voice recordingsstored as voice data files. The size of this item is limited to 14 digits, limitingthe total size of the voice data file to 99 terabytes.The third in<strong>for</strong>mation item (total digital samples / TSM) is optional. It givesthe number of digital samples in the voice data file after any decompression ofthe compressed signal. This in<strong>for</strong>mation item applies only to digital voicerecordings stored as voice data files. The size of this item is limited to 14 digits.May, 2013 DRAFT VERSION UPDATE 2013 Page 245

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