Title :
Adaptive optimal decompositions with hybrid DCT-subband coding
Author_Institution :
Univ. Catholique de Louvain, Belgium
Abstract :
A generalization of the discrete wavelet transform, i.e., the hybrid subband coding decomposition is introduced. It consists of the application of adequate invertible operators at each level of decomposition (inner-and inter-subbands) before application of the next level of decomposition. An important application is hybrid discrete cosine-transform (DCT)-subband coding, which produces optimal local (in time or frequency) decorrelation of the coefficients of decomposition
Keywords :
discrete cosine transforms; encoding; wavelet transforms; adaptive optimal decompositions; decomposition coefficients; discrete cosine-transform; discrete wavelet transform; frequency decorrelation; hybrid DCT-subband coding; signal processing; time decorrelation; Cyclotrons; Decorrelation; Discrete cosine transforms; Discrete wavelet transforms; Filter bank; Pulse modulation; Quantization; Signal processing; Speech analysis; Wavelet packets;
Conference_Titel :
Time-Frequency and Time-Scale Analysis, 1992., Proceedings of the IEEE-SP International Symposium
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-0805-0
DOI :
10.1109/TFTSA.1992.274155
