Discrete cosine transform: algorithms, advantages, applications
Discrete cosine transform: algorithms, advantages, applications
Signal Processing with Lapped Transforms
Signal Processing with Lapped Transforms
Extended lapped transforms: fast algorithms and applications
ICASSP '91 Proceedings of the Acoustics, Speech, and Signal Processing, 1991. ICASSP-91., 1991 International Conference
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The perfect reconstruction conditions for a time-varying lapped transform are presented. The emphasis is on a class of cosine modulated filter banks known as the extended lapped transforms. A mechanism for achieving this error-free variation thru the factorization of the transform matrix into sparse factors is presented along with a discussion of transition states. Some possible applications are indicated, including a structure for perfect reconstruction orthogonal time-varying wavelet packets