Quality improvement of scalable audio codec based on phase estimation technique for reconstructed harmonic structure

Wei Chen Chang, Wen-Yu Su

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

Abstract

A spectral oriented trees based audio coder with harmonic structure reconstruction was proposed recently. Its fine scalability, low complexity, and almost MP3 quality make it suitable for Internet applications. However, during the reconstruction process, the phase information of reconstructed coefficient is absent. This may create phase discontinuities between two adjacent frames. It is audible in listening tests and makes the objective grade degraded for many testing sources. In this paper, we presented a new inter/intra-frame phase estimation method to reduce the problem and a refined harmonic reconstruction method is also applied. The quality improvement is significant. It outperforms the previous method and its performance is closer to the popular MP3pro for many audio music sources.

Original languageEnglish
Title of host publicationAudio Engineering Society - 121st Convention Papers 2006
Pages432-437
Number of pages6
Publication statusPublished - 2006 Dec 1
Event121st Convention Papers 2006 - San Francisco, CA, United States
Duration: 2006 Oct 52006 Oct 8

Publication series

NameAudio Engineering Society - 121st Convention Papers 2006
Volume1

Other

Other121st Convention Papers 2006
CountryUnited States
CitySan Francisco, CA
Period06-10-0506-10-08

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All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Acoustics and Ultrasonics

Cite this

Chang, W. C., & Su, W-Y. (2006). Quality improvement of scalable audio codec based on phase estimation technique for reconstructed harmonic structure. In Audio Engineering Society - 121st Convention Papers 2006 (pp. 432-437). (Audio Engineering Society - 121st Convention Papers 2006; Vol. 1).