* Function: CalcCovariance2 * * Description: calculate covariance matrix for p02 (4.6.18.6.2) * * Inputs: buffer of low-freq samples, starting at time index = 0, * freq index = patch subband * * Outputs: complex covariance element p02re, p02im * format = integer (Q0) * 2^N, with scalefactor N >= 0 * * Return: scalefactor N * * Notes: o
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