Data compression of Blainville's beaked whale vocalizations.

摘要

Defence Research and Development Canada Atlantic uses autonomous underwater vehicles and sonobuoys to capture recordings of nearby marine mammal activity. The data are then transmitted via a low bandwidth satellite link. Timely transmission of these data is critical in achieving compliance with the Naval directive to check marine mammal activity within the vicinity of training exercises before their commencement. Currently, the data are not compressed, and timely transmission is not being achieved.;Two separate versions of the algorithm were used, one for use with sonobuoys, which have more processing capabilities, and one more suitable for autonomous underwater vehicles which have limited on-board processing capability. These data compression techniques allow for a significant reduction in transmission time of the marine activity data while retaining the information necessary for detection.;This thesis uses the signal processing technique called the fast orthogonal search to achieve data compression. The fast orthogonal search algorithm has previously been shown capable of providing model expansion representation of both time and frequency domain signals. Furthermore, irregular sampling and domain transformation have been successfully used for data reconstruction. The proposed algorithm, patented by Korenberg et al. [1], has previously been used for interferometric spectrometer data.