Programmer Guide/General Descriptions/APar

The APar element contains parameters calculated for a specific audio segment. An APar must be the child of an ASeg element. The APar element has the following attributes:

type - the type of method. The following types exist:

F0 - Fundamental Frequency RMS - Signal Energy Phase - Phase Spectrum ASpec - Amplitude Spectrum Fof - Formant Frequencies Cep - Cepstrum LAT - Log attack time CLPC - LPC coefficient TFA - Amplitude Spectrogram TFP - Phase Spectrogram

method - the method. The following methods exist:

FO - Formants RMSB - Frequency Band Energy RMS - Signal Energy (RMS) F0A - Fundamental Frequency (SIFT) F0B - Fundamental Frequency (autocorr.) F0H - Fundamental Frequency (harmonic grid) ALPHA - LPC - Error Energy IRRSP - Irrelevance Amplitude Spectrum IRRTH - Irrelevance Threshhold FFT - FFT Amplitude Spectrum FFTP - FFT Phase Spectrum CEPST - Cepstrum Smoothed Spectrum LOFAR - Spectrum - Cepstrum WAVE - Wavelet Amplitude Spectrum WAVEP - Wavelet Phase Spectrum STFT - FFT Amplitude Spectrogram STFTP - FFT Phase Spectrogram STWT - Wavelet Amplitude Spectrogram STWTP - Wavelet Phase Spectrogram LPC - LPC Smoothed Spectrum LPAI - LPC Inverse Filter Coefficients LPRC - LPC Reflection Coefficients LPAR - LPC Area Coefficients

nx - the number of x axis ny - the number of y data vectors CH - the channel this parameter was calculated for. lfrm - the frame length in milliseconds sfrm - the frame shift in milliseconds nfrm - the number of frames date - the date the parameter was saved time - the time the parameter was saved