公开(公告)号：EP1309964A4

公开(公告)日：2007-04-18

申请号：EP01951885

申请日：2001-07-12

Applicant: IBM

Inventor： CHAZAN DAN ,  ZIBULSKI MEIR ,  HOORY RON

IPC: G10L25/90 ,  G10L11/04

CPC classification number: G10L25/90

Abstract: A method for estimating a pitch frequency of an audio signal includes computing a first transform of the signal to a frequency domain over a first time interval, and computing a second transform of the signal to the frequency domain over a second time interval, which contains the first time interval. A line spectrum of the signal is found, based on the first and second transforms, the spectrum including spectral lines having respective line amplitudes and line frequencies. A utility function (130) that is periodic in the frequencies of the lines in the spectrum is then computed. This function is indicative, for each candidate pitch frequency in a given pitch frequency range, of a compatibility of the spectrum with the candidate pitch frequency. The pitch frequency of the speech signal is estimated responsive to the utility function.

公开(公告)号：WO0207363A3

公开(公告)日：2002-05-16

申请号：PCT/IL0100644

申请日：2001-07-12

Applicant: IBM ,  CHAZAN DAN ,  ZIBULSKI MEIR ,  HOORY RON

Inventor： CHAZAN DAN ,  ZIBULSKI MEIR ,  HOORY RON

IPC: G10L25/90 ,  G10L11/04

CPC classification number: G10L25/90

Abstract: A method for estimating a pitch frequency of an audio signal includes computing a first transform of the signal to a frequency domain over a first time interval (42), and computing a second transform of the signal of the frequency domain over a second time interval (44), which contains the first time interval. A line spectrum of the signal is found, based on the first and second transforms, the spectrum including spectral lines having respective line amplitudes and line frequencies. A utility function (130) that is periodic in the frequencies of the lines in the spectrum is then computed. This function is indicative (158), for each candidate pitch frequency in a given pitch frequency range, of a compatibility of the spectrum with the candidate pitch frequency. The pitch frequency of the speech signal is estimated responsive to the utility function (176, 178).

Abstract translation: 一种用于估计音频信号的音调频率的方法包括：在第一时间间隔（42）上计算信号到频域的第一变换（42），以及在第二时间间隔上计算频域信号的第二变换（ 44），其包含第一时间间隔。 基于第一和第二变换，发现包括具有各自线路幅度和线路频率的谱线的频谱的信号线谱。 然后计算在频谱中的线的频率中周期性的效用函数（130）。 对于给定音调频率范围内的每个候选音调频率，该功能指示（158）频谱与候选音调频率的兼容性。 响应于效用函数来估计语音信号的音调频率（176,178）。

公开(公告)号：DE60136716D1

公开(公告)日：2009-01-08

申请号：DE60136716

申请日：2001-07-12

Applicant: IBM

Inventor： CHAZAN DAN ,  ZIBULSKI MEIR ,  HOORY RON

IPC: G10L25/90

Abstract: A method for estimating a pitch frequency of an audio signal includes computing a first transform of the signal to a frequency domain over a first time interval, and computing a second transform of the signal to the frequency domain over a second time interval, which contains the first time interval. A line spectrum of the signal is found, based on the first and second transforms, the spectrum including spectral lines having respective line amplitudes and line frequencies. A utility function that is periodic in the frequencies of the lines in the spectrum is then computed. This function is indicative, for each candidate pitch frequency in a given pitch frequency range, of a compatibility of the spectrum with the candidate pitch frequency. The pitch frequency of the speech signal is estimated responsive to the utility function.

公开(公告)号：CA2413138A1

公开(公告)日：2002-01-24

申请号：CA2413138

申请日：2001-07-12

Applicant: IBM

Inventor： ZIBULSKI MEIR ,  CHAZAN DAN ,  HOORY RON

IPC: G10L25/90 ,  G10L11/04

Abstract: A method for estimating a pitch frequency of an audio signal includes computing a first transform of the signal to a frequency domain over a first time interval (42), and computing a second transform of the signal of the frequency domain over a second time interval (44), which contains the first time interval. A line spectrum of the signal is found, based on the first an d second transforms, the spectrum including spectral lines having respective line amplitudes and line frequencies. A utility function (130) that is periodic in the frequencies of the lines in the spectrum is then computed. This function is indicative (158), for each candidate pitch frequency in a given pitch frequency range, of a compatibility of the spectrum with the candidate pitch frequency. The pitch frequency of the speech signal is estimated responsive to the utility function (176, 178).

公开(公告)号：AU7272901A

公开(公告)日：2002-01-30

申请号：AU7272901

申请日：2001-07-12

Applicant: IBM

Inventor： CHAZAN DAN ,  ZIBULSKI MEIR ,  HOORY RON

IPC: G10L25/90

Abstract: A method for estimating a pitch frequency of an audio signal includes computing a first transform of the signal to a frequency domain over a first time interval, and computing a second transform of the signal to the frequency domain over a second time interval, which contains the first time interval. A line spectrum of the signal is found, based on the first and second transforms, the spectrum including spectral lines having respective line amplitudes and line frequencies. A utility function that is periodic in the frequencies of the lines in the spectrum is then computed. This function is indicative, for each candidate pitch frequency in a given pitch frequency range, of a compatibility of the spectrum with the candidate pitch frequency. The pitch frequency of the speech signal is estimated responsive to the utility function.