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drowe67
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codec2
Open source speech codec designed for communications quality speech between 700 and 3200 bit/s. The main application is low bandwidth HF/VHF digital radio.
GNU Lesser General Public License v2.1
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WP2030 - sine.c cleanup
#33
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drowe67
opened
10 months ago
drowe67
commented
10 months ago
[ ] review source code and comments
[ ] Hamming -> Hann window
[ ] some tests, e.g. estimate amplitude on sine wave, analysis/synthesis test with contrived pitch
[ ] check variable names match codec2.pdf
[ ] consider making trapezoidal window function a triangular function, as I think with TW == 0.05 that is effectively what we are doing.
[ ] consider making notation a bit more consistent, e.g. n for time index, k for DFT index, m for harmonic index
[ ] In v est function distinguish Am from model->A
[ ] decide between phi (source code) for phase or theta (latex), it should be consistent