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Implementation of Binaural Decoding in Spatial Cue based Multi-Channel Audio Coding

  • Journal of Knowledge Information Technology and Systems
  • Abbr : JKITS
  • 2014, 9(1), pp.85-94
  • Publisher : Korea Knowledge Information Technology Society
  • Research Area : Interdisciplinary Studies > Interdisciplinary Research
  • Published : February 28, 2014

Kwangki Kim 1

1나사렛대학교

Accredited

ABSTRACT

This paper describes the binaural decoding in spatial cue based multi-channel audio coding to provide users with a realistic audio sound in the stereo headphone environment. Generally, the binaural decoding generates the binaural stereo sound by convolving multi-channel audio signals with the head related transfer function (HRTF) in time domain. So, due to a very high complexity, the typical binaural decoding cannot be implemented in the real time and applied in the network environment. To reduce the complexity of the typical binaural decoding, we proposed a new binaural decoding scheme which is implemented in the frequency domain by utilizing the gain factors calculated from the virtual source location information (VSLI). As the proposed binaural decoding can generate the binaural stereo sound only using 10% of the overall complexity of the typical binaural decoding, its' real-time implementation is possible and it can be applied in the network system. The subjective listening test result shows that the proposed binaural decoding has the statistically same sound quality compared to that of the typical binaural decoding.

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