Efficient design of low delay IIR QMF banks for speech subband coding

Speech subband coding offers resources for wideband speech processing due to the utilization of masking effects of the human ear. The effectiveness of this method depends on a proper splitting of the signal frequency band. In this paper we propose an efficient design of low delay QMF banks using IIR prototype filters. These filterbanks allow sharp bandsplitting operations with a sufficient amount of subband channels and distinctively low perceptive phase distortions.