A low-complexity down-mixing structure on quadraphonic headsets for surround audio

Tai Ming Chang, Yi Ming Shiu, Pao Chi Chang

Research output: Contribution to journalArticlepeer-review


This work presents a four-channel headset achieving a 5.1-channel-like hearing experience using a low-complexity head-related transfer function (HRTF) model and a simplified reverberator. The proposed down-mixing architecture enhances the sound localization capability of a headset using the HRTF and by simulating multiple sound reflections in a room using Moorer's reverberator. Since the HRTF has large memory and computation requirements, the common-acoustical-pole and zero (CAPZ) model can be used to reshape the lower-order HRTF model. From a power consumption viewpoint, the CAPZ model reduces computation complexity by approximately 40%. The subjective listening tests in this study shows that the proposed four-channel headset performs much better than stereo headphones. On the other hand, the four-channel headset that can be implemented by off-the-shelf components preserves the privacy with low cost.

Original languageEnglish
Pages (from-to)1526-1533
Number of pages8
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Issue number7
StatePublished - Jul 2013


  • Head-related transfer function
  • Reverberation
  • Surround audio
  • Virtual loudspeaker


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