Examples of RingMatrix

com.meapsoft.RingMatrix
A class to hold a matrix of values that is a ring buffer of columns. Each column will always have the same address, but the accessible columns will change as the matrix grows. The last N columns will always be accessible. @author Mike Mandel (mim@ee.columbia.edu)

Examples of com.meapsoft.RingMatrix

    double[] curFrame;
    double sum = 0;


    // we're expecting a certain frequency resolution...
    boolean recalculateSTFT = stft.getRows() != N;
    RingMatrix newstft = null;
    if (recalculateSTFT)
    {
      // keep the same number of frames as in stft
      newstft = STFT.getSTFT(stft.getSamples(startFrame, startFrame
          + length), (N - 1) * 2, stft.nhop);
      length = newstft.getColumns();
    }


    // intialize average to 0
    Arrays.fill(linSpec, 0);


    // System.out.println("startFrame: " + startFrame + " length: " +
    // length);
    // collect average linear spectrum
    for (int frame = 0; frame < length; frame++)
    {
      if (!recalculateSTFT)
        curFrame = stft.getFrame(startFrame + frame);
      else
        curFrame = newstft.getColumn(frame);


      // what's going on? For very sparse segments curFrame is sometimes
      // null???
      // is there a zero length segment or something?
      if (curFrame != null)

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Examples of com.meapsoft.RingMatrix

    double[] freq = new double[1];
    double[] curFrame;


    boolean recalculateSTFT = stft.getRows() != N;
    
    RingMatrix newstft = null;
    if (recalculateSTFT)
    {
      if (preEmphasis)
      {
        double[] origSamples = stft.getSamples(startFrame, startFrame + length);
        double[] preEmphSamples = com.meapsoft.DSP.preEmphasis(origSamples);
        newstft = STFT.getSTFT(preEmphSamples, (N - 1) * 2, stft.nhop);
        length = newstft.getColumns();
      }
      else
      {
        // keep the same number of frames as in stft
        newstft = STFT.getSTFT(stft.getSamples(startFrame, startFrame
            + length), (N - 1) * 2, stft.nhop);
        length = newstft.getColumns();
      }
    }
    


    // if there are no features we just bail.
    if (length == 0)
      return null;


    //double wtdsum = 0;
    // double sumwts = 0;


    // collect average linear spectrum
    Arrays.fill(linSpec, 0);
    for (int frame = 0; frame < length; frame++)
    {


      if (!recalculateSTFT)
        curFrame = stft.getFrame(startFrame + frame);
      else
        curFrame = newstft.getColumn(frame);


      if (curFrame != null)
      {
        for (int band = 0; band < linSpec.length; band++)
          linSpec[band] += Math.pow(10, curFrame[band] / 10) / length;

View Full Code Here

Examples of com.meapsoft.RingMatrix

    double sum = 0;
    double sum2 = 0;
    double[] pitch = new double[1];


    boolean recalculateSTFT = stft.getRows() != N;
    RingMatrix newstft = null;
    if (recalculateSTFT)
    {
      // keep the same number of frames as in stft
      newstft = STFT.getSTFT(stft.getSamples(startFrame, startFrame
          + length), (N - 1) * 2, stft.nhop);
      length = newstft.getColumns();
    }




    // Apply mapping to each frame, keep histogram of results
    int[] pitchcounts = new int[nOpBins];
    Arrays.fill(pitchcounts, 0);
    for (int frame = 0; frame < length; frame++) {
      if (!recalculateSTFT)
        curFrame = stft.getFrame(startFrame + frame);
      else
        curFrame = newstft.getColumn(frame);


      if (curFrame != null) {
        for (int band = 0; band < linSpec.length; band++) {
          linSpec[band] = Math.pow(10, curFrame[band] / 20);
          //System.out.print(linSpec[band] + " ");

View Full Code Here

Examples of com.meapsoft.RingMatrix

    double[] curFrame;
    double sum = 0;
    double sum2 = 0;


    boolean recalculateSTFT = stft.getRows() != N;
    RingMatrix newstft = null;
    if (recalculateSTFT)
    {
      // keep the same number of frames as in stft
      newstft = STFT.getSTFT(stft.getSamples(startFrame, startFrame
          + length), (N - 1) * 2, stft.nhop);
      length = newstft.getColumns();
    }


    // intialize average to 0
    Arrays.fill(linSpec, 0);


    // collect average linear spectrum
    for (int frame = 0; frame < length; frame++)
    {


      if (!recalculateSTFT)
        curFrame = stft.getFrame(startFrame + frame);
      else
        curFrame = newstft.getColumn(frame);


      if (curFrame != null)
        for (int band = 0; band < linSpec.length; band++)
          linSpec[band] += Math.pow(10, curFrame[band] / 10) / length;
    }

View Full Code Here

Examples of com.meapsoft.RingMatrix

  public double[] features(STFT stft, long startFrame, int length) {
    double[] freq = new double[1];
    double[] curFrame;


    boolean recalculateSTFT = stft.getRows() != N;
    RingMatrix newstft = null;
    if(recalculateSTFT) {
        // keep the same number of frames as in stft
        newstft = STFT.getSTFT(stft.getSamples(startFrame, startFrame+length), (N-1)*2, stft.nhop);
        length = newstft.getColumns();
    }    
    
  //if there are no features we just bail.
  if (length == 0)  
    return null;


    double wtdsum = 0;
    double sumwts = 0;


    // collect average linear spectrum
    Arrays.fill(linSpec, 0);
    for(int frame=0; frame<length; frame++) {


        if(!recalculateSTFT)
            curFrame = stft.getFrame(startFrame+frame);
        else
            curFrame = newstft.getColumn(frame);


        if(curFrame != null) {
            for(int band=0; band<linSpec.length; band++)
    linSpec[band] += Math.pow(10,curFrame[band]/10) / length;
  }

View Full Code Here

Examples of com.meapsoft.RingMatrix

  {
    double[] pitch = new double[1];
    double[] curFrame;


    boolean recalculateSTFT = stft.getRows() != N;
    RingMatrix newstft = null;
    if (recalculateSTFT)
    {
      // keep the same number of frames as in stft
      newstft = STFT.getSTFT(stft.getSamples(startFrame, startFrame
          + length), (N - 1) * 2, stft.nhop);
      length = newstft.getColumns();
    }


    // if there are no features we just bail.
    if (length == 0)
      return null;


    double wtdsum = 0;
    double sumwts = 0;


    // collect average linear spectrum
    Arrays.fill(linSpec, 0);
    for (int frame = 0; frame < length; frame++)
    {


      if (!recalculateSTFT)
        curFrame = stft.getFrame(startFrame + frame);
      else
        curFrame = newstft.getColumn(frame);


      if (curFrame != null)
      {
        for (int band = 0; band < linSpec.length; band++)
          linSpec[band] += Math.pow(10, curFrame[band] / 10) / length;

View Full Code Here

Examples of com.meapsoft.RingMatrix

    double[] curFrame;
    double sum = 0;
    double sum2 = 0;


    boolean recalculateSTFT = stft.getRows() != N;
    RingMatrix newstft = null;
    if(recalculateSTFT)
    {
        // keep the same number of frames as in stft
        newstft = STFT.getSTFT(stft.getSamples(startFrame, startFrame+length), (N-1)*2, stft.nhop);
        length = newstft.getColumns();
    }    


    // intialize average to 0
    Arrays.fill(linSpec, 0);


    // collect average linear spectrum
    for(int frame=0; frame<length; frame++) {


        if(!recalculateSTFT)
            curFrame = stft.getFrame(startFrame+frame);
        else
            curFrame = newstft.getColumn(frame);


        if(curFrame != null)
            for(int band=0; band<linSpec.length; band++)
                linSpec[band] += Math.pow(10,curFrame[band]/10) / length;
    }

View Full Code Here

Examples of com.meapsoft.RingMatrix

    double[] curFrame;
    double sum = 0;


    // we're expecting a certain frequency resolution...
    boolean recalculateSTFT = stft.getRows() != N;
    RingMatrix newstft = null;
    if(recalculateSTFT) {
        // keep the same number of frames as in stft
        newstft = STFT.getSTFT(stft.getSamples(startFrame, startFrame+length), (N-1)*2, stft.nhop);
        length = newstft.getColumns();
    }    


    // intialize average to 0
    Arrays.fill(linSpec, 0);


    // collect average linear spectrum
    for(int frame=0; frame<length; frame++) {
        if(!recalculateSTFT)
            curFrame = stft.getFrame(startFrame+frame);
        else
            curFrame = newstft.getColumn(frame);


        for(int band=0; band<linSpec.length; band++)
            linSpec[band] += curFrame[band] / length;
    }

View Full Code Here

Examples of com.meapsoft.RingMatrix

  public double[] features(STFT stft, long startFrame, int length) {
    double[] pitch = new double[1];
    double[] curFrame;


    boolean recalculateSTFT = stft.getRows() != N;
    RingMatrix newstft = null;
    if(recalculateSTFT) {
        // keep the same number of frames as in stft
        newstft = STFT.getSTFT(stft.getSamples(startFrame, startFrame+length), (N-1)*2, stft.nhop);
        length = newstft.getColumns();
    }    


  //if there are no features we just bail.
  if (length == 0)  
    return null;
  
    double wtdsum = 0;
    double sumwts = 0;


    // collect average linear spectrum
    Arrays.fill(linSpec, 0);
    for(int frame=0; frame<length; frame++) {


        if(!recalculateSTFT)
            curFrame = stft.getFrame(startFrame+frame);
        else
            curFrame = newstft.getColumn(frame);


        if(curFrame != null) {
            for(int band=0; band<linSpec.length; band++)
    linSpec[band] += Math.pow(10,curFrame[band]/10) / length;
  }

View Full Code Here

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