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

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 VERSIONDevice type descriptionDevice typecodeSpeaker phone 8Lapel Microphone 9Other 10oThe fourth in<strong>for</strong>mation item (microphone type coden / MTC) is optional. It isan integer that specifies the transducer type from Table 80 Microphone TypeCodes. Transducer arrays using mixed transducer types shall be designated“other”.Table 80 Microphone Type CodesMicrophone type description Microphonetype codeUnknown 0Carbon 1Electret 2Dynamic 3Other 4ooooThe fifth in<strong>for</strong>mation item (capture environment description text / ENV) is anoptional text field of up to 4000 characters to describe the acoustic environmentof the recording. Examples of text placed in this item would be “reverberantbusy restaurant”, “urban street”, “public park during day”.The sixth in<strong>for</strong>mation item (transducer distance / DST) is optional. It is aninteger and specifies the approximate distance in centimeters, rounded to thenearest integer number of centimeters, between the speaker in the identifiedsegments and the transducer. A value of 0 will be used if the distance is lessthan one-centimeter. Some example distances: handheld = 5cm; throat mic =0cm, mobile telephone = 15cm; Voice-over-internet-protocol (VOIP) with acomputer = 80cm, unless other in<strong>for</strong>mation is available.The seventh in<strong>for</strong>mation item (acquisition source code / AQC) is an optionalinteger that specifies the source from which the voice in the identified segmentswas received. Only one value is allowed. Permissible values are given in Table101 Acquisition source of the Record Type-20: Source representation recordAny conflict between this value and Field 11.008: Acquisition source / AQSshall be resolved by taking this item to be correct <strong>for</strong> all segments identified inthe subfield, DIA and SID, of this subfield in Field 11.038.The eighth in<strong>for</strong>mation item (voice modification description text / VMT) is anoptional, unrestricted string <strong>for</strong> a description of any digital masking betweentransducer and recording, disguisers or other attempts to change the voicequality. Any processing techniques used on the recording should be indicated,May, 2013 DRAFT VERSION UPDATE 2013 Page 265

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