| 摘要 |
PURPOSE:To assure the high quality of voice information compression by correcting a pitch period by using a lograrithmic power spectrum, searching the nearly max. value on the logarithmic power spectrum in accordance with the corrected pitch period and obtaining a normal PSE by the interpolation thereof. CONSTITUTION:The pitch period obtd. from the point indicating the max. value of the ceptsrum obtd. in a cepstrum section 7 is corrected by the point indicating the max. value of the logarithmic power spectrum to obtain a exact pitch period and the nearly max. value is searched to obtain the exact PSE by the interpolation of 3 to 5 points at the time of sampling the power spectrum by the pitch period interval in order to obtain the power spectrum envelop (PSE) in a pitch extracting section 8. The high quality of the voice information compression is assured in this way. |
