public FeaturesContainer GetFeatures(SignalContainer signal)
{
var features = signal.GetFrames().Select(frame => new FrameFeatures(frame.Bounds, frame.Signal)).
Where(feature => feature.FeatureDimension == signal.FrameSize).ToList();
return(new FeaturesContainer(features));
}
public SignalContainer GetSpeech(SignalContainer rawSignal)
{
SignalContainer singal = rawSignal.Copy();
singal.FrameSize = 100; //ToDo! Constant change
singal.FrameShift = singal.FrameSize;
List <double> framesEnergy = singal.GetFrames().Select(frame => SignalHelper.GetAverageEnergy(frame.Signal)).ToList();
double averageEnergy = framesEnergy.Average();
double[] flattenedFramesEnergy = ApplyMeanFilter(framesEnergy.ToArray(), 3);
SpeechBounds speechFramesBounds = GetSpeechBounds(flattenedFramesEnergy, averageEnergy);
var speechFrames = singal.GetFrames().Skip(speechFramesBounds.Start).Take(speechFramesBounds.Width);
double[] speechSignal = speechFrames.SelectMany(frame => frame.Signal).ToArray();
return(new SignalContainer(speechSignal)
{
FrameSize = rawSignal.FrameSize,
FrameShift = rawSignal.FrameShift
});
}
public FeaturesContainer GetFeatures(SignalContainer signal)
{
IList <Frame> frames = signal.GetFrames();
List <FrameFeatures> features = new List <FrameFeatures>();
foreach (Frame frame in frames)
{
SignalContainer extendedSignal = GetSignalForFiltering(frame.Signal);
IList <FilterProcessResult> extendedSignalChannels = FilterBankCore.ProcessSignal(extendedSignal);
FilterBankCore.Reset();
IList <FilterProcessResult> signalChannels = GetFilteredSignalsPart(extendedSignalChannels, frame.Bounds.Width);
double[] channelsNormalizedEnergy = GetChannelsEnergy(signalChannels);
features.Add(new FrameFeatures(frame.Bounds, channelsNormalizedEnergy));
}
return(new FeaturesContainer(features));
}