Sub-band coding of audio using recursively indexed quantization

Author

Chen, Yang-Jeng ; Maher, Robert C.

Author_Institution

Dept. of Electr. Eng., Nebraska Univ., Lincoln, NE, USA

fYear

1995

fDate

15-18 Oct 1995

Firstpage

187

Lastpage

190

Abstract

A low-complexity audio data compression technique using sub-band coding (SBC) and a recursively indexed quantizer (RIQ) is proposed. The characteristics of the proposed system are investigated and several relevant implementation issues are described. The objective performance of the proposed system is compared to conventional coding techniques. A real time implementation of the proposed system running on a DSP microprocessor is also discussed. The results indicate that the RIQ-SBC system exhibits objective signal-to-quantization noise ratio 2 to 5 dB higher than other coders of similar computational complexity when processing a variety of wideband audio signals

Keywords

audio coding; audio signals; computational complexity; data compression; digital signal processing chips; microprocessor chips; quantisation (signal); DSP microprocessor; RIQ-SBC system; computational complexity; low complexity audio data compression; objective performance; objective signal-to-quantization noise ratio; real time implementation; recursively indexed quantization; subband coding; wideband audio signals; Computational complexity; Data compression; Distortion; Finite impulse response filter; Image coding; Information science; Quantization; Real time systems; Signal processing; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Signal Processing to Audio and Acoustics, 1995., IEEE ASSP Workshop on

Conference_Location

New Paltz, NY

Print_ISBN

0-7803-3064-1

Type

conf

DOI

10.1109/ASPAA.1995.482987

Filename

482987