HARK Document Version 2.3.1. (Revision: 8682) : CMConjEachElement

6.2.8 CMConjEachElement

6.2.8.1 Module Overview

Performs conjugate of a correlation matrix.

6.2.8.2 Requested Files

None.

6.2.8.3 Usage

In what case is the node used?

The calculation node of the correlation matrix is the one created for the sound source from CMMakerFromFFT , CMMakerFromFFTwithFlag , and has the function of taking conjugate of each component.

Typical Examples

Figure. 6.22 shows the usage example of CMConjEachElement node. The input terminal is connected to a correlation matrix calculated from CMMakerFromFFT or CMMakerFromFFTwithFlag , etc. (type is Matrix<complex<float> > type, but to handle a correlation matrix, convert the three dimensional complex array to a two dimensional complex array and then output).

$\includegraphics[width=100mm]{fig/modules/CMConjEachElement.eps}$

Figure 6.22: Network Example using CMConjEachElement

6.2.8.4 I/O and property setting of the node

Input

INPUTCM: : Matrix<complex<float> > type. A correlation matrix for each frequency bin. The $M$ -th order complex square array correlation matrix inputs $NFFT/2 + 1$ items. Matrix<complex<float> > contains rows corresponding to frequency ( $NFFT/2 + 1$ rows), and columns containing the complex correlation matrix ( $M * M$ columns across).

Output

OUTPUTCM: : Matrix<complex<float> > type. The correlation matrix after taking conjugate of INPUTCM is output.

Parameter

No parameters.

6.2.8.5 Module Description

Performs conjugate of a correlation matrix. The correlation matrix is a complex three-dimensional array of size $k \times M \times M$ and the division $k \times M \times M$ times is performed as follows. Here, $k$ is the number of frequency bins ( $k = NFFT/2 + 1$ ), and $M$ is the number of channels in the input signal.

 calculate{

    FOR i = 1 to k
        FOR i = 1 to M
            FOR i = 1 to M

                OUTPUTCM[i][j][k] = conj(INPUTCM[i][j][k])

            ENDFOR
        ENDFOR
    ENDFOR

 }