Real-time performance measures of perceptual audio coding

被引：0

作者：

Pasero, E ^{[1
]}

Montuori, A ^{[1
]}

机构：

[1] Politecn Torino, Dipartimento Elettron, Turin, Italy

来源：

ITRE 2004: 2ND INTERNATIONAL CONFERENCE INFORMATION TECHNOLOGY: RESEARCH AND EDUCATION, PROCEEDINGS | 2004年

关键词：

psycho-acoustics; wavelets; real-time digital signal processing;

D O I：

10.1109/ITRE.2004.1393678

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

The selection of the wavelet packet best basis of a perceptual real-time audio encoder has been a challenging task for researchers. Due to the subjective nature of the auditory masking phenomenon, fully objective performance measures (entropy versus SNR, delay, etc.) are not sufficient for the selection of optimal representations. In our work we present a DSP application by means of which we can measure, or each hybrid wavelet packet basis resulting from a predetermined library of wavelet filters, the bitrate of a perceptually transparent coding of the audio input and the overall filter bank delay. The novelty is that the transparency of the compression is established with a subjective evaluation. The tool user can customize both the filter bank parameters and the psycho-acoustic model parameters by means of a MATLAB (R) graphical interface and listen in real-time the reconstructed signal. The audio codec runs in real-time on a TI TMS320C6711 (TM) DSK.

引用

页码：213 / 217

页数：5

共 18 条

[1]

[Anonymous], 1993, Ten Lectures of Wavelets

[2]

[Anonymous], 1997, A Wavelet Tour of Signal Processing

[3]

FU X, 2000, SPRA558B TEX INSTR A

[4] CRITICAL BANDWIDTH AND FREQUENCY COORDINATES OF BASILAR MEMBRANE [J].

GREENWOOD, D .

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1961, 33 (10) :1344-&

[5] Hybrid Wavelet Packet analysis [J].

Hedges, RA .

PROCEEDINGS OF THE IEEE-SP INTERNATIONAL SYMPOSIUM ON TIME-FREQUENCY AND TIME-SCALE ANALYSIS, 1998, :221-224

[6]

Jayant N. S., 1984, DIGITAL CODING WAVEF

[7]

JOHNSTON JD, 1988, P ICASSP 88, V5, P2524

[8]

*MATHWORKS INC, 2002, MATLAB LINK COD COMP

[9]

PASERO E, 2001, P IEEE MTAC 2001 MUL

[10]

PASERO E, 2003, P ICASSP 2003 INT C, V2, P761

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