| Title |
Fundamental Frequency Estimation based on Time-Frequency Analysis |
| Keywords |
순간주파수 ; 기본주파수 Instantaneous Frequency ; Fundamental Frequency ; Pitch |
| Abstract |
A simple robust fundamental frequency estimator on the time-frequency domain is proposed. Combined with the appropriately designed low-pass filter, the instantaneous frequency estimator based on the Teager-Kaiser energy function can detect the fundamental frequency of speech signal. The Teager-Kaiser function can be obtained through real computation and show the change of frequency as time goes. And when a speech block with N samples is processed with a lowpass fille. with length of L, it requires O(N·(L+5))operations, compared to O(N·2log_2N+L))operations in the recently introduced wavelet and conventional instantaneous frequency method. The computer simulation confirms the usefulness of the proposed fundamental frequency estimation method. |