SUMMARY AND FUTURE DIRECTIONS

We have presented a system that obtains linear frequency chirp parameters efficiently and accurately. The system is significant because it reduces the frame rate needed to capture the essential features of input signals, while incurring little computational expense at the frame level. Future work will focus on making the chirp parameter estimation more consistent. We will attempt spectral interpolation for the derivative estimates in eqn. 5 and will investigate combining estimates from multiple chirp estimators into a more robust estimate. The task of intra-frame trajectory matching is yet to be addressed. This could provide for a significant area of exploration, with trajectory matching incorporating a confidence measure in the chirp parameter or a history of a given trajectory. Advances in this area will also have a significant impact on the implementation of chirps in synthesis.