File formats
   SIGVIEW Help Home


See also general topics about loading and saving signals.

Standard SIGVIEW version can read signals stored in several different file formats:

*.WAV files

Standard Wave audio format (8, 16, 24 or 32-bit) including compressed WAV files if corresponding codecs are installed in the operating system.

Compressed file formats

Use File/Open signal… menu option. You will be able to open most compressed file formats like compressed WAV files, MP3, WMA,  ASF etc.  SIGVIEW will use Microsofts DirectShow and installed codecs for the file decompression. That ensures that any file playable on your computer will also be readable in SIGVIEW. Please note that file decompression can be a rather slow operation, and the resulting signals can  be very long.

Audio Interchange File Format (.AIF, .AIFC, .AIFF)

SIGVIEW uses DirectX services for loading these files. Therefore, a Windows Media Player v7 or higher is required.

Sun Microsystems and NeXT audio files (.AU,.SND)

SIGVIEW uses DirectX services for loading these files. Therefore, a Windows Media Player v7 or higher is required.

ASCII/CSV files

Available through ASCII Import/Export options in File menu. The ASCII files have to be in a following format (choose appropriate option if your files use comma as decimal separator):

X value<TAB>Y value channel1<TAB>Y value channel 2<TAB>...Y value channel N<new line>
X value<TAB>Y value channel1<TAB>Y value channel 2<TAB>...Y value channel N<new line>
X value<TAB>Y value channel1<TAB>Y value channel 2<TAB>...Y value channel N<new line>
X value<TAB>Y value channel1<TAB>Y value channel 2<TAB>...Y value channel N<new line>

Raw binary files

Available through File/Raw binary files/Export and Import menu options. Raw binary files are simple binary arrays of samples, saved in one of these supported formats:

8-bit signed
8-bit unsigned
16-bit signed
16-bit unsigned
32-bit float

Only one signal (channel) can be loaded from one raw binary file.

EDF (European File Format)

The European Data Format (EDF) is a simple and flexible format for exchange and storage of multichannel biological signals. EDF was developed by a group of European medical engineers and published in 1992 in Electroencephalography and Clinical Neurophysiology 82, pages 391-393. Since then, EDF became a de-facto standard for EEG and PSG recordings in commercial equipment and multicenter research projects. You can find further information about this format at: http://www.hsr.nl/edf
  
File formats