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Complexity Reduction of Virtual Reverberation Filtering Based on Index-Based Convolution for Resource-Constrained Devices

  • Kwang Myung Jeon
  • Nam In Park
  • Hong Kook Kim
  • Ji Woon Kim
  • Myeong Bo Kim
Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 151)

Abstract

Virtual reverberation effects are a vital part of virtual audio reality. Reverberation effects can be directly applied by implementing a convolution process between the input audio and a reverberation filter response that characterizes a virtual space. In order to apply reverberation effects, however, additional or dedicated processors are required for practical implementation due to the excessively long impulse response of the reverberation filter. In this paper, we propose a fast method for applying virtual reverberation effects based on a reverberation filter approximation and an index-based convolution process. Throughout exhaustive experiments, we attempt to optimize the proposed method in terms of satisfaction of the reverberation effect and its computational requirements. We then implement three different types of virtual reverberation functions in a resource-constrained digital imaging device. It is shown that the virtual reverberation effects implemented by the proposed approach are able to operate in real-time with less than 5ms latency, with an over 80% overall satisfaction score in the subjective preference test.

Keywords

Virtual reverberation sparseness of impulse response index-based convolution audio effects 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Kwang Myung Jeon
    • 1
  • Nam In Park
    • 1
  • Hong Kook Kim
    • 1
  • Ji Woon Kim
    • 2
  • Myeong Bo Kim
    • 2
  1. 1.School of Information and CommunicationsGwangju Institute of Science and Technology (GIST)GwangjuKorea
  2. 2.Digital Imaging BusinessSamsung ElectronicsGyeonggi-doKorea

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