ACQ - Revision history

Jsummers at 02:42, 10 February 2014

2014-02-10T02:42:48Z

Dan Tobias at 14:12, 5 April 2013

2013-04-05T14:12:44Z

Dan Tobias at 19:12, 17 November 2012

2012-11-17T19:12:52Z

Njvack: Created page with "{| |File Formats | > |Electronic File Formats | > |Scientific Data formats | > |Biopac AcqKnowledge |} {{FormatInfo |subcat=Scientific Data formats |extension..."

2012-11-13T21:53:54Z

Created page with "{| |File Formats | > |Electronic File Formats | > |Scientific Data formats | > |Biopac AcqKnowledge |} {{FormatInfo |subcat=Scientific Data formats |extension..."

New page

{|
|[[File Formats]]
| >
|[[Electronic File Formats]]
| >
|[[Scientific Data formats]]
| >
|[[Biopac AcqKnowledge]]
|}

{{FormatInfo
|subcat=Scientific Data formats
|extensions={{ext|acq}}
}}

== General description ==

AcqKnowledge files are saved by the BioPac system to save time series of physiological measurements -- for example, blood pressure, blood oxygenation, temperature, or skin conductance. It is a multi-channel file format in which each channel can have its own sampling rate (expressed relative to the file's master sampling rate). In addition, each channel may be integer or floating-point in nature.

There are two main flavors of AcqKnowledge files (both having the .acq extension): uncompressed and compressed. In the uncompressed file format, channel data is interleaved together; in the compressed format, each channel is stored as its own array, compressed by zlib.

The format is partially documented [http://www.biopac.com/Manuals/app_pdf/app156.pdf in BioPac's AppNote 156].

== Software ==

BioPac's own AcqKnowledge software can read and write .acq files. In addition, [https://github.com/njvack/bioread Bioread] is a Python-based open-source library that reads all known versions of .ACQ files. There is also a [http://www.mathworks.com/matlabcentral/fileexchange/14562-load-biopac-acq-acqknowledge-for-pc-data Matlab-based library] to do the same thing.

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−	~~\|[[File Formats]]~~
−	~~\| >~~
−	~~\|[[Electronic File Formats]]~~
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−	~~\|[[Scientific Data formats]]~~
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 AcqKnowledge files are saved by the BioPac system to save time series of physiological measurements -- for example, blood pressure, blood oxygenation, temperature, or skin conductance. It is a multi-channel file format in which each channel can have its own sampling rate (expressed relative to the file's master sampling rate). In addition, each channel may be integer or floating-point in nature.
-There are two main flavors of AcqKnowledge files (both having the .acq extension): uncompressed and compressed. In the uncompressed file format, channel data is interleaved together; in the compressed format, each channel is stored as its own array, compressed by zlib.
+There are two main flavors of AcqKnowledge files (both having the .acq extension): uncompressed and compressed. In the uncompressed file format, channel data is interleaved together; in the compressed format, each channel is stored as its own array, compressed by [[zlib]].
 The format is partially documented [http://www.biopac.com/Manuals/app_pdf/app156.pdf in BioPac's AppNote 156].

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 {{FormatInfo
-|subcat=Scientific Data formats
+|subcat=Health and Medicine
 |extensions={{ext|acq}}
 }}
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 BioPac's own AcqKnowledge software can read and write .acq files. In addition, [https://github.com/njvack/bioread Bioread] is a Python-based open-source library that reads all known versions of .ACQ files. There is also a [http://www.mathworks.com/matlabcentral/fileexchange/14562-load-biopac-acq-acqknowledge-for-pc-data Matlab-based library] to do the same thing.