LPC_to_Spectrum.h 1.4 KB

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  1. #ifndef _LPC_to_Spectrum_h_
  2. #define _LPC_to_Spectrum_h_
  3. /* LPC_to_Spectrum.h
  4. *
  5. * Copyright (C) 1994-2011, 2015-2016 David Weenink
  6. *
  7. * This code is free software; you can redistribute it and/or modify
  8. * it under the terms of the GNU General Public License as published by
  9. * the Free Software Foundation; either version 2 of the License, or (at
  10. * your option) any later version.
  11. *
  12. * This code is distributed in the hope that it will be useful, but
  13. * WITHOUT ANY WARRANTY; without even the implied warranty of
  14. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15. * General Public License for more details.
  16. *
  17. * You should have received a copy of the GNU General Public License
  18. * along with this work. If not, see <http://www.gnu.org/licenses/>.
  19. */
  20. /*
  21. djmw 19980224
  22. djmw 20020812 GPL header
  23. djmw 20110702 Latest modification
  24. */
  25. #include "LPC.h"
  26. #include "Spectrum.h"
  27. void LPC_Frame_into_Spectrum (LPC_Frame me, Spectrum thee, double bandwidthReduction, double deEmphasisFrequency);
  28. autoSpectrum LPC_to_Spectrum (LPC me, double t, double dfMin, double bandwidthReduction, double deEmphasisFrequency);
  29. autoSpectrum LPC_to_Spectrum2 (LPC me, double t, double dfMin, double bandwidthReduction);
  30. /* if(dfMin >= 0) df <= dfMin else df = NyquistFrequency / 512 */
  31. /* integration radius r = exp (- pi * bandwidthReduction / samplingFrequency) */
  32. #endif /* _LPC_and_Spectrum_h_ */