private SignalContainer(SignalContainer other)
{
FrameSize = other.FrameSize;
FrameShift = other.FrameShift;
vSignal = other.Signal;
ShouldRebuildFrames = other.ShouldRebuildFrames;
Frames = other.Frames == null ? null : new List <Frame>(other.Frames);
}
public List <FilterProcessResult> ProcessSignal(SignalContainer input)
{
List <FilterProcessResult> processResult = new List <FilterProcessResult>();
foreach (FilterInfo filterInfo in Filters)
{
double[] processedSignal = filterInfo.Filter.ProcessSamples(input.Signal);
processResult.Add(new FilterProcessResult(filterInfo.Band, processedSignal));
}
return(processResult);
}
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));
}
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
});
}