Showing papers by "Takao Hinamoto published in 2020"
01 Oct 2020
TL;DR: A new expression of evaluating l2-sensitivity for generalized direct-form II structure of two-dimensional (2-D) separable-denominator digital filters is derived and analyzed, and the results are compared with those obtained by existing techniques.
Abstract: A new expression of evaluating l 2 -sensitivity for generalized direct-form II structure of two-dimensional (2-D) separable-denominator digital filters is derived and analyzed. Unlike the previous work, l 2 -sensitivity is analyzed for the filter structure instead of its state-space realization. Then the resulting l 2 -sensitivity measure is compared with that deduced in a recent study of generalized direct-form II state-space realization of 2-D separable in denominator digital filters. In a numerical example, the new l 2 -sensitivity measure is minimized with respect to free parameters subject to l 2 -scaling constraints by an exhaustive search over a set of discrete values of finite cardinality, and the results are compared with those obtained by existing techniques.
2 citations
12 Oct 2020
TL;DR: The design of perfect-reconstruction cosine-modulated filter banks is revisited by applying new linearization techniques for the time-domain quadratic perfect reconstruction constraints to provide improved approximation accuracy hence improved performance with insignificant increase in complexity.
Abstract: The design of perfect-reconstruction cosine-modulated filter banks is revisited by applying new linearization techniques for the time-domain quadratic perfect reconstruction constraints. The new techniques are analyzed to explain why they can provide improved approximation accuracy hence improved performance with insignificant increase in complexity. A design example is presented for performance demonstration and comparison.
1 citations