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comparison xtract/xtract_scalar.h @ 117:2b2d0609e44f

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Fixed bug in peak interpolation algorithm in xtract_peak_spectrum()
author Jamie Bullock <jamie@postlude.co.uk>
date Sun, 04 May 2008 11:02:40 +0000
parents 859495925633
children efb1c1ae2ba8
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116:859495925633 117:2b2d0609e44f
392 * \param N: the number of elements to be considered 392 * \param N: the number of elements to be considered
393 * \param *argv: a pointer to a float representing the audio sample rate 393 * \param *argv: a pointer to a float representing the audio sample rate
394 * \param *result: the pitch of N values from the array pointed to by *data 394 * \param *result: the pitch of N values from the array pointed to by *data
395 * 395 *
396 * This algorithm is based on the AMDF, with peak and centre clipping. It would benefit from further improvements to improve noise robustness and overall efficiency 396 * This algorithm is based on the AMDF, with peak and centre clipping. It would benefit from further improvements to improve noise robustness and overall efficiency
397 *
398 * It is based on suggestion by Robert Bristow-Johnson in a discussion on the comp.dsp mailing list, subject "Reference implementation of pitch detection"
397 * 399 *
398 */ 400 */
399 int xtract_f0(const float *data, const int N, const void *argv, float *result); 401 int xtract_f0(const float *data, const int N, const void *argv, float *result);
400 402
401 /** \brief Extract the fundamental frequency of an input vector 403 /** \brief Extract the fundamental frequency of an input vector