Perceptual Audio Coding Using Adaptive Pre- and Post-filters and Lossless Compression

Schuller G, Yu B, Huang D, Edler B (2002)

Publication Type: Journal article

Publication year: 2002

Journal

IEEE Transactions on Speech and Audio Processing Institute of Electrical and Electronics Engineers

Book Volume: 10

Pages Range: 379-390

Journal Issue: 6

DOI: 10.1109/TSA.2002.803444

Abstract

This paper proposes a versatile perceptual audio coding method that achieves high compression ratios and is capable of low encoding/decoding delay. It accommodates a variety of source signals (including both music and speech) with different sampling rates. It is based on separating irrelevance and redundancy reductions into independent functional units. This contrasts traditional audio coding where both are integrated within the same subband decomposition. The separation allows for the independent optimization of the irrelevance and redundancy reduction units. For both reductions, we rely on adaptive filtering and predictive coding as much as possible to minimize the delay. A psycho-acoustically controlled adaptive linear filter is used for the irrelevance reduction, and the redundancy reduction is carried out by a predictive lossless coding scheme, which is termed weighted cascaded least mean squared (WCLMS) method. Experiments are carried out on a database of moderate size which contains mono-signals of different sampling rates and varying nature (music, speech, or mixed). They show that the proposed WCLMS lossless coder outperforms other competing lossless coders in terms of compression ratios and delay, as applied to the pre-filtered signal. Moreover, a subjective listening test of the combined pre-filter/lossless coder and a state-of-the-art perceptual audio coder (PAC) shows that the new method achieves a comparable compression ratio and audio quality with a lower delay.

Authors with CRIS profile

Bernd Edler Lehrstuhl für Audiosignalanalyse (AudioLabs) (Stiftungslehrstuhl)

Involved external institutions

Fraunhofer-Institut für Digitale Medientechnologie IDMT DE Germany (DE) AT&T Bell Laboratories US United States (USA) (US)

How to cite

APA:

Schuller, G., Yu, B., Huang, D., & Edler, B. (2002). Perceptual Audio Coding Using Adaptive Pre- and Post-filters and Lossless Compression. IEEE Transactions on Speech and Audio Processing, 10(6), 379-390. https://doi.org/10.1109/TSA.2002.803444

MLA:

Schuller, Gerald, et al. "Perceptual Audio Coding Using Adaptive Pre- and Post-filters and Lossless Compression." IEEE Transactions on Speech and Audio Processing 10.6 (2002): 379-390.

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