Claims
- 1. A method for synthesizing high-pitched sounds comprising the steps of:shifting pitch of a high-pitched sound signal to a lower pitch; after shifting pitch to a lower pitch performing LPC analysis of the lower pitch sound signal to extract the desired spectral parameters, and quantization of said spectral parameters to a desired data rate.
- 2. The method of claim 1 wherein the step before quantization the step of performing parametric editing.
- 3. The method of claim 1 wherein the step of shifting pitch includes the steps of upsampling, low pass filtering, downsampling, and time scale modification.
- 4. The method of claim 3 including the step of storing said spectral parameters.
- 5. The method of claim 4 including the step of reproducing copies of said stored spectral parameters and storing a copy of said copies in a storage medium.
- 6. The method of claim 5 including the steps of coupling a microprocessor to said storage medium and a speaker to reproduce the sound signal.
- 7. A method for synthesizing a high-pitched child's voice comprising the steps of:reducing the pitch of the high-pitched child's voice by about 20 percent to produce a lower pitch sound signal; after reducing the pitch by about 20 percent, performing LPC analysis of the lower pitch sound signal to extract spectral parameters; and quantization of said spectral parameters to a desired data rate.
- 8. The method of claim 7 wherein the step of reducing pitch includes the steps of upsampling, low pass filtering, downsampling and time scale modifications.
- 9. The method of claim 7 including the step of storing said spectral parameters.
- 10. The method of claim 7 wherein the step before quantization the step of performing parameteric editing.
Parent Case Info
This application claims priority under 35 USC §119 (c) (1) of provisional application No. 60/001,260, filed Aug. 14, 1995.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
5536902 |
Serra et al. |
Jul 1996 |
A |
5581652 |
Abe et al. |
Dec 1996 |
A |
5641927 |
Pawate et al. |
Jun 1997 |
A |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/002260 |
Aug 1995 |
US |