Title :
Warped ARMA filters in high quality audio coding
Author :
Deriche, Mohanied ; Ning, Daryl
Author_Institution :
Dept. of Electr. Eng., King Fahd Univ. of Pet. & Miner., Dhahran, Saudi Arabia
Abstract :
In this paper, a novel audio coder using the discrete wavelet transform (DWT) and a warped linear prediction (WLP) model, is proposed. In contrast to conventional LP, WLP allows for the control of frequency resolution to closely match the response of the human auditory system. The residual from the inverse WLP filtering is analyzed by a wavelet filterbank designed to approximate the critical bands. For monophonic signals sampled at 44.1 kHz, the coder achieves near transparent quality at an average bit-rate of 64 kb/s.
Keywords :
audio coding; discrete wavelet transforms; filtering theory; quantisation (signal); signal resolution; signal sampling; 44.1 kHz; 64 kbit/s; audio coder; audio coding scheme; discrete wavelet transform; frequency resolution control; human auditory system; monophonic signals; quantization error; warped ARMA filters; warped linear prediction model; wavelet filterbank; Audio coding; Auditory system; Control systems; Discrete wavelet transforms; Filtering; Filters; Frequency; Humans; Predictive models; Signal resolution;
Conference_Titel :
Signal Processing and Its Applications, 2003. Proceedings. Seventh International Symposium on
Print_ISBN :
0-7803-7946-2
DOI :
10.1109/ISSPA.2003.1224838
