A new audio compression method based on spectral oriented trees

Wen-Yu Su, Wei Chen Chang, Jing Xin Wang

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

3 Citations (Scopus)

Abstract

A new audio compression method based on Spectral Oriented Trees is presented. After frequency transformation is performed over a frame of audio samples, the transform coefficients are arranged to form one to several quad trees depending on harmonic structures of the signal. In each quad tree, the coefficients having larger magnitudes regarded as more important are placed closer to the root position of the tree. A method called Concurrent Encoding in Hierarchical Tree (CEIHT) is employed to encode the tree coefficients such that those important coefficients are encoded before less important coefficients. Therefore, scalability is easy by discarding the tailing bits at any position of the bit-stream. The quality is comparable to that of MP3. The proposed method doesn't use psychoacoustic model and the computation complexity is relatively lower compared to those of MP3 and AAC. Only one small coding table is used for CEIHT method while the tables used in MP3 or AAC require lots of memory spaces. Thus, the proposed method provides a lower cost alternative, too.

Original languageEnglish
Title of host publicationAudio Engineering Society - 118th Convention Spring Preprints 2005
Pages1082-1088
Number of pages7
Publication statusPublished - 2005 Dec 1
Event118th Convention Spring Preprints 2005 - Barcelona, Spain
Duration: 2005 May 282005 May 31

Publication series

NameAudio Engineering Society - 118th Convention Spring Preprints 2005
Volume3

Other

Other118th Convention Spring Preprints 2005
CountrySpain
CityBarcelona
Period05-05-2805-05-31

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All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Acoustics and Ultrasonics

Cite this

Su, W-Y., Chang, W. C., & Wang, J. X. (2005). A new audio compression method based on spectral oriented trees. In Audio Engineering Society - 118th Convention Spring Preprints 2005 (pp. 1082-1088). (Audio Engineering Society - 118th Convention Spring Preprints 2005; Vol. 3).