Maximum Phase Modeling for Sparse Linear Prediction of Speech
TABLE II: Relative computation time (in %) for the compared methods.
['[BOLD] LP2', '[BOLD] MaxP-LP2', '[BOLD] WLP2', '[BOLD] MaxP-WLP2', '[BOLD] LP1', '[BOLD] MaxP-LP1']
The computational complexity of the methods is now assessed by the Relative Computation Time (RCT), defined as the ratio between the computation time over the sound duration. The proposed MaxP method results in an increase of complexity by a factor varying between 2.8 and 3.9. This is because 2 LP analyses of order Ka and 2 of order Kc are achieved, instead of only one of order K. Note also that WLP2-based techniques require in addition the estimation of GCIs, which is performed in a RCT of 7.3%.