ap

Functions

int main(int argc, char *argv[])

ap [ option ] f0file [ infile ]

-a int
- algorithm used for aperiodicity extraction
  - 0 TANDEM-STRAIGHT
  - 1 WORLD (D4C)
-l int
- FFT length
-p int
- frame shift [point] \((1 \le P)\)
-s double
- sampling rate [kHz] \((8 \le F_s \le 98)\)
-L double
- lower bound of aperiodicity \((0 \le L < H)\)
-H double
- upper bound of aperiodicity \((L < H \le 1)\)
-q int
- f0 input format
  - 0 pitch \((F_s / F_0)\)
  - 1 F0
  - 2 log F0
-o int
- output format
  - 0 Ha
  - 1 Hp
  - 2 Ha/Hp
  - 3 Hp/Ha
infile str
- double-type waveform
f0file str
- double-type pitch
stdout
- double-type aperiodicity

The below is a simple example to extract aperiodicity from data.d.

pitch -s 16 -p 80 -L 80 -H 200 -o 1 < data.d > data.f0
ap -s 16 -p 80 -q 1 data.f0 < data.d > data.ap

Parameters:

argc – [in] Number of arguments.
argv – [in] Argument vector.

Returns:

0 on success, 1 on failure.

See also

pitch

class AperiodicityExtraction

Extract aperiodicity from waveform.

The input is whole audio waveform and the output is the sequence of the aperiodicity measure. The implemented algorithms of the extraction are TANDEM-STRAIGHT and D4C.

[1] H. Kawahara et al., “Simplification and extension of non-periodic excitation source representations for high-quality speech manipulation systems,” Proc. of Interspeech, pp. 38-41, 2010.

[2] M. Morise, “D4C, a band-aperiodicity estimator for high-quality speech synthesis,” Proc. of Speech Communication, vol. 84, pp. 57-65, 2016.

Public Types

enum Algorithms

Aperiodicity extraction algorithms.

Values:

enumerator kTandem

enumerator kWorld

enumerator kNumAlgorithms

Public Functions

AperiodicityExtraction(int fft_length, int frame_shift, double sampling_rate, Algorithms algorithm)

Parameters:

fft_length – [in] FFT length.
frame_shift – [in] Frame shift in point.
sampling_rate – [in] Sampling rate in Hz.
algorithm – [in] Algorithm used for aperiodicity extraction.

inline bool IsValid() const

Returns:: True if this object is valid.

bool Run(const std::vector<double> &waveform, const std::vector<double> &f0, std::vector<std::vector<double>> *aperiodicity) const

Parameters:

waveform – [in] Waveform.
f0 – [in] Fundamental frequency in Hz.
aperiodicity – [out] Aperiodicity measure.

Returns:

True on success, false on failure.