/// <summary>
/// Zeros power in the silence frames.
/// </summary>
/// <param name="alignmentFile">
/// The alignment file.
/// </param>
/// <param name="secondsPerFrame">
/// The seconds per frame.
/// </param>
/// <exception cref="ArgumentException">ArgumentException.
/// </exception>
/// <exception cref="InvalidDataException">InvalidDataException.
/// </exception>
public void ZeroSilence(string alignmentFile, float secondsPerFrame)
{
if (!File.Exists(alignmentFile))
{
throw new FileNotFoundException(Helper.NeutralFormat("Alignment file \"{0}\" not found", alignmentFile));
}
// Loads alginment file.
SegmentFile segmentFile = new SegmentFile();
segmentFile.Load(alignmentFile);
// Gets the last segmentation.
WaveSegment last = segmentFile.WaveSegments[segmentFile.WaveSegments.Count - 1];
// Gets the silence frame and end frame.
if ((int)(last.StartTime / secondsPerFrame) > _data.Count)
{
throw new InvalidDataException(
Helper.NeutralFormat(
"The start frame {0} of last phone [{1}] is larger than power length {2} in file \"{3}\", remove this sentence from training set.",
(int)(last.StartTime / secondsPerFrame), last.Label, _data.Count, _fileName));
}
List<int> silenceFrames = new List<int>();
for (int i = 0; i < segmentFile.WaveSegments.Count; ++i)
{
if (segmentFile.WaveSegments[i].IsSilenceFeature)
{
silenceFrames.Add((int)(segmentFile.WaveSegments[i].StartTime / secondsPerFrame));
if (i < segmentFile.WaveSegments.Count - 1)
{
silenceFrames.Add((int)(segmentFile.WaveSegments[i + 1].StartTime / secondsPerFrame));
}
else
{
silenceFrames.Add(_data.Count);
}
}
}
// Zeros the power data at silence frames.
for (int i = 0; i < silenceFrames.Count; i += 2)
{
for (int j = silenceFrames[i]; j < silenceFrames[i + 1]; ++j)
{
_data[j] = 0.0f;
}
}
}
/// <summary>
/// Convert the label info sentence into a segment file.
/// </summary>
/// <returns>SegmentFile.</returns>
public SegmentFile ToSegmentFile()
{
SegmentFile segmentFile = new SegmentFile();
foreach (LabelInfo lableInfo in _listLabelInfo)
{
WaveSegment segment = new WaveSegment();
segment.Label = lableInfo.Label;
segment.StartTime = LabelInfo.ConvertToSecond(lableInfo.Start);
segment.EndTime = LabelInfo.ConvertToSecond(lableInfo.End);
segmentFile.WaveSegments.Add(segment);
}
segmentFile.UpdateNonSilenceWaveSegments();
return segmentFile;
}
