Title :
Comparison of filterbanks for high quality audio coding
Author :
Brandenburg, Karlheinz ; Eberlein, Ernst ; Herre, Jürgen ; Edler, Bernd
Author_Institution :
Lehrstuhl fuer Tech. Elektronik, Erlangen-Nurnberg Univ., Germany
Abstract :
Perceptual coding techniques have recently been applied successfully to high-quality coding of digital audio signals. The basic perceptual coding system uses an analysis/synthesis system to map the time-domain data into a number of frequency-domain channels. A perceptual model is used to estimate the amount of noise shaping needed in order to avoid any audible noise due to the quantization of the frequency domain data. Different filterbanks have been applied to perceptual coding. A comparison of different filterbanks shows that there is no performance penalty for hybrid filterbanks compared to other solutions
Keywords :
audio signals; digital signals; encoding; filtering and prediction theory; analysis/synthesis system; digital audio signals; filterbanks; frequency-domain channels; high quality audio coding; hybrid coding; noise shaping; perceptual coding system; perceptual model; time-domain data; Audio coding; Channel bank filters; Computational complexity; Digital filters; Filter bank; Frequency domain analysis; Masking threshold; Narrowband; Noise figure; Quantization;
Conference_Titel :
Circuits and Systems, 1992. ISCAS '92. Proceedings., 1992 IEEE International Symposium on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-0593-0
DOI :
10.1109/ISCAS.1992.230257
