Audio coding using sinusoidal excitation representation

Author

Chang, Wen-Whei ; Wang, De-Yu ; Wang, Li-Wei

Author_Institution

Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

Volume

1

fYear

1997

fDate

21-24 Apr 1997

Firstpage

311

Abstract

Most LPC-based audio coders employ simplistic noise-shaping operations to perform psychoacoustic control of quantization noise. In this paper, we report on new approaches to exploiting perceptual masking in the design of adaptive quantization of LPC excitation parameters. Due to its localized spectral sensitivity, sinusoidal excitation representation is preferred to spectrally flat signals for use in excitation modeling. Simulation results indicate that the proposed multisinusoid excited coder can deliver high quality audio reproduction at the rate of 72 kb/s

Keywords

audio coding; linear predictive coding; quantisation (signal); signal representation; spectral analysis; 72 kbit/s; LPC excitation parameters; adaptive quantization; audio coding; high quality audio reproduction; localized spectral sensitivity; multisinusoid excited coder; perceptual masking; quantization noise; simulation results; sinusoidal excitation representation; Audio coding; Bit rate; Filters; Frequency; Linear predictive coding; Noise shaping; Psychoacoustic models; Psychology; Quantization; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on

Conference_Location

Munich

ISSN

1520-6149

Print_ISBN

0-8186-7919-0

Type

conf

DOI

10.1109/ICASSP.1997.599635

Filename

599635