A hybrid warped linear prediction (WLP) AAC audio coding algorithm

Jaseong Lee, Young Cheol Park, Dae Hee Youn, Hong Goo Kang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We propose a hybrid warped linear prediction (WLP) AAC audio coding algorithm. The proposed algorithm employs a warped linear prediction processor to construct a perceptual pre and post-filter for the MPEG-4 AAC. The WLP residue is applied to the MDCT filter-bank and the signal to mask ratio of the corresponding block is modified to set a masking threshold for the WLP residues. In the decoder, the reconstructed residual signal is through a modified WLP synthesis filter to restore the audio signal. Subjective tests show that the proposed audio codec operating at 50kbps has comparable perceptual quality to the conventional MPEG-4 AAC operating at the 58kbps.

Original languageEnglish
Title of host publicationAudio Engineering Society - 122nd Audio Engineering Society Convention 2007
Pages678-684
Number of pages7
Publication statusPublished - 2007 Dec 1
Event122nd Audio Engineering Society Convention 2007 - Vienna, Austria
Duration: 2007 May 52007 May 8

Publication series

NameAudio Engineering Society - 122nd Audio Engineering Society Convention 2007
Volume2

Other

Other122nd Audio Engineering Society Convention 2007
CountryAustria
CityVienna
Period07/5/507/5/8

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Acoustics and Ultrasonics

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  • Cite this

    Lee, J., Park, Y. C., Youn, D. H., & Kang, H. G. (2007). A hybrid warped linear prediction (WLP) AAC audio coding algorithm. In Audio Engineering Society - 122nd Audio Engineering Society Convention 2007 (pp. 678-684). (Audio Engineering Society - 122nd Audio Engineering Society Convention 2007; Vol. 2).