Title :
Efficient implementation of Koilpillai-Vaidyanathan pseudo quadrature mirror filter (PQMF) banks
Author :
Wei, Xiang ; Shaw, Martyn J. ; Varley, Martin R.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Central Lancashire, Preston, UK
fDate :
12/1/1996 12:00:00 AM
Abstract :
An efficient implementation algorithm for the Koilpillai-Vaidyanathan (see ibid., vol.41, no.1, p.82-92, 1993) pseudo quadrature mirror filter (KVPQMF) bank, which is useful in audio compression schemes, is presented. The implementation employs a polyphase system with discrete cosine transforms (DCTs). Theoretical and practical results show a typical saving in computational load of 82% over the direct implementation
Keywords :
audio coding; band-pass filters; data compression; discrete cosine transforms; filtering theory; quadrature mirror filters; transform coding; DCT; algorithm; audio coding; audio compression; computational load; discrete cosine transforms; polyphase system; pseudoquadrature mirror filter banks; subband coding; Audio compression; Channel bank filters; Decoding; Discrete cosine transforms; Filter bank; Frequency; Mirrors; Prototypes; Signal synthesis; Workstations;
Journal_Title :
Signal Processing, IEEE Transactions on
