Title :
Quantization noise reduction in oversampled filter banks
Author :
Bölcskei, Helmut ; Hlawatsch, Franx
Author_Institution :
Inst. of Commun. & Radio-Freq. Eng., Wien Univ. of Technol., Austria
Abstract :
We introduce a new method for quantization noise reduction in oversampled filter banks. This method is based on predictive quantization and achieves much better noise reduction than the best existing methods for noise reduction in overcomplete representations. It is demonstrated that the proposed oversampled predictive subband coders are well suited for subband coding applications where low resolution quantizers have to be used. In this case, oversampling combined with linear prediction improves the effective resolution of the subband coder at the cost of increased rate. Simulation results are provided to assess the achievable quantization noise reduction and resolution enhancement
Keywords :
channel bank filters; filtering theory; image coding; image enhancement; image representation; image resolution; image sampling; prediction theory; quantisation (signal); low resolution quantizers; overcomplete representations; oversampled filter banks; oversampled predictive subband coders; predictive quantization; quantization noise reduction; resolution enhancement; simulation results; subband coding applications; Bit rate; Channel bank filters; Costs; Filter bank; MIMO; Noise reduction; Quantization; Radio frequency; Signal analysis; Vectors;
Conference_Titel :
Time-Frequency and Time-Scale Analysis, 1998. Proceedings of the IEEE-SP International Symposium on
Conference_Location :
Pittsburgh, PA
Print_ISBN :
0-7803-5073-1
DOI :
10.1109/TFSA.1998.721473