Subband-multipulse digital audio broadcasting for mobile receivers

Author

Lin, X. ; Hanzo, L. ; Steele, R. ; Webb, W.T.

Author_Institution

Dept. of Electron. & Comput. Sci., Southampton Univ., UK

Volume

39

Issue

4

fYear

1993

fDate

12/1/1993 12:00:00 AM

Firstpage

373

Lastpage

382

Abstract

The audio quality, robustness and implementational complexity of a novel mobile digital audio broadcast scheme are addressed. The audio codec proposed is based on an efficient combination of subband coding (SBC) and multipulse excited linear prediction coding (MPLPC). The bit allocation is dynamically adapted according to both the signal power in different subbands and a perceptual hearing model. Typically a segmental signal to noise ratio (SEGSNR) in excess of 30 dB associated with high fidelity subjective quality was achieved for 2.67-b/sample transmissions at a bit rate of 86 kb/s. Perceptually unimpaired audio quality was achieved for a bit error rate (BER) of about 10^-4, when injecting random errors, which was degraded for increased BERs. In order to provide robust error protection, the audio codec was also subjected to a rigorous bit sensitivity analysis. Four different forward error correction schemes were investigated in order to explore the complexity, bit rate, and robustness tradeoffs

Keywords

codecs; digital radio systems; error correction codes; linear predictive coding; mobile radio systems; radio broadcasting; radio receivers; 86 kbit/s; BER; MPLPC; SBC; SEGSNR; audio codec; bit allocation; bit error rate; bit rate; bit sensitivity analysis; complexity; forward error correction; high fidelity subjective quality; mobile digital audio broadcasting; mobile receivers; multipulse excited linear prediction coding; perceptual hearing model; perceptually unimpaired audio quality; random errors; robust error protection; segmental signal to noise ratio; signal power; subband coding; Auditory system; Bit error rate; Bit rate; Codecs; Degradation; Digital audio broadcasting; Protection; Robustness; Sensitivity analysis; Signal to noise ratio;

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/11.259597

Filename

259597