Title :
Preservation of subband symmetry in multirate signal coding
Author :
Brislawn, Christopher M.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
fDate :
12/1/1995 12:00:00 AM
Abstract :
The article derives necessary and sufficient conditions for a multirate linear phase FIR filter bank, acting on a symmetrically extended finite-length input signal, to produce either symmetric or antisymmetric downsampled subbands. Such techniques have gained popularity for image coding applications, and we provide the solution to a key technical problem in terms of the input and filter symmetries and the downsampling ratio
Keywords :
FIR filters; band-pass filters; delay circuits; filtering theory; image coding; image sampling; antisymmetric downsampled subbands; downsampling ratio; filter symmetry; image coding applications; input symmetry; multirate linear phase FIR filter bank; multirate signal coding; necessary conditions; subband symmetry; sufficient conditions; symmetric downsampled subbands; symmetrically extended finite-length input signal; Block codes; Boundary conditions; Digital images; Discrete cosine transforms; Filter bank; Finite impulse response filter; Frequency; Image coding; Nonlinear filters; Signal mapping;
Journal_Title :
Signal Processing, IEEE Transactions on
