Audio Codecs Quality Analyzer 1.0

Audio Codecs Quality Analyzer is a voice coders (vocoders) tool that is usually measured according to a mean subjective estimation - MOS (Mean Opinion Score).
MOS is usually calculated as expert estimations of a set of speech signals played by different phones. Each expert gives his score: 1 = bad, 2 = poor, 3 = clear, 4 = good, 5 = excellent. Mean value of the obtained results is taken afterwards.
CISCO Systems (www.cisco.com) gives test results for different codecs according to the clearest speech signal.
Please click here to download Sevanas Vocoders Quality Checker demo. The program is a simplified implementation of Sevanas solution for audio codecs quality analysis software. To start working with it please choose Tests -> Codec Quality.
After you pushed OK button, the program loads DLL and checks its interface. If the interface is ok, then the following process starts:
- program requests codecs frame size and generates a test set of audio data according to the proper frame size;
- correspondent vocoder is loaded from the DLL and program passes the audio signal array together with all parameters into it;
- vocoder starts encoding;
- original and decoded signal are compared using internal audio signal comparison function;
- window with signal similarity coefficient is displayed. 100% corresponds to identical signals.