A general theory for local cosine bases with multiple overlapping
نویسنده
چکیده
Cosine modulated lter banks are a well{known signal processing tool whose applicative eld ranges from coding, to ltering, 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 Lemari e{Meyer wavelets. We propose a uni ed approach to both discrete and continuous time cosine modulated lter banks. The resulting theory o ers a single general framework that makes clear the deep similarity between the two cases.
منابع مشابه
Discrete- and Continuous-Time Local Cosine Bases with Multiple Overlapping - Signal Processing, IEEE Transactions on
Cosine-modulated filter banks (CMFB’s) are filter banks whose impulse responses are obtained by modulating a window with cosines. Among their applications are video and audio compression and multitone modulation. Their continuoustime counterpart is known as local cosine bases. Even though there is an extended literature on the discrete-time case both for single and multiple overlapping, the con...
متن کاملEidgen Ossische Technische Hochschule Lausanne Politecnico Federale Di Losanna Swiss Federal Institute of Technology Lausanne Ecole Polytechnique
Cosine modulated lter banks are lter banks whose impulse responses are obtained by modulating a window with cosines. Among their applications are video and audio compression and multitone modulation. Their continuous time counterpart is known as local cosine bases. While there is an extended literature on the discrete time case, both for single and multiple overlapping, the continuous time case...
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