Cosine modulated filter banks are a well-known signal processing tool whose applicative field ranges from coding, to filtering, to spectral estimation. Because of their peculiar structure (the impulse responses are obtained by modulating a prototype window with trigonometric functions) they are easy to design and have a low computation complexity. Their continuous-time counterpart, local cosine bases, play an important role in the construction of Lemarie-Meyer wavelets. We propose a unified approach to both discrete and continuous time cosine modulated filter banks. The resulting theory offers a single general framework that makes clear the deep similarity between the two cases.
General theory for local cosine bases with multiple overlapping
Bernardini Riccardo
1997-01-01
Abstract
Cosine modulated filter banks are a well-known signal processing tool whose applicative field ranges from coding, to filtering, to spectral estimation. Because of their peculiar structure (the impulse responses are obtained by modulating a prototype window with trigonometric functions) they are easy to design and have a low computation complexity. Their continuous-time counterpart, local cosine bases, play an important role in the construction of Lemarie-Meyer wavelets. We propose a unified approach to both discrete and continuous time cosine modulated filter banks. The resulting theory offers a single general framework that makes clear the deep similarity between the two cases.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
