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

Wei Chen Chang, Wen-Yu Su

研究成果: Conference contribution

摘要

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.

原文English
主出版物標題Audio Engineering Society - 121st Convention Papers 2006
頁面432-437
頁數6
出版狀態Published - 2006 12月 1
事件121st Convention Papers 2006 - San Francisco, CA, United States
持續時間: 2006 10月 52006 10月 8

出版系列

名字Audio Engineering Society - 121st Convention Papers 2006
1

Other

Other121st Convention Papers 2006
國家/地區United States
城市San Francisco, CA
期間06-10-0506-10-08

All Science Journal Classification (ASJC) codes

  • 建模與模擬
  • 聲學與超音波

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