Patent ID: 7062430
Filing Date: 2006-06-13
Classification: H03H

Abstract:
1. A signal processing device comprising a biorthogonal filter bank operable to process a finite length signal that comprises a left boundary and a right boundary, the biorthogonal filter bank comprising: an analysis filter bank comprising one or more left boundary filters, one or more right boundary filters, and one or more steady-state analysis filters, each left boundary filter and each right boundary filter comprising a row vector, the left and right boundary filters having been designed by: a synthesis filter bank corresponding to the analysis filter bank, the synthesis filter bank comprising a number of left boundary filters, a number of right boundary filters, and a number of steady-state synthesis filters, a synthesis matrix specifying the left boundary filters, right boundary filters, and steady-state synthesis filters of the synthesis filter bank, the synthesis matrix having been created by calculating the dual, or inverse, of the square analysis matrix.