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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Pilot-Based Coding Scheme for Parametric Stereo in Enhanced aacPlus

  • Pang, Hee-Suk (Department of Electronics Engineering, Sejong University)
  • Received : 2009.05.07
  • Accepted : 2009.06.15
  • Published : 2009.10.31
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Abstract

We propose a pilot-based coding (PBC) scheme for lossless bit rate reduction of parametric stereo (PS) in enhanced aacPlus. It uses PBC in addition to the existing frequency and time differential coding to encode and decode PS parameter indexes. We also design optimal Huffman codebooks (HCBs) for PBC in the proposed scheme. Experiments show that the proposed scheme is superior to the original coding scheme, where both the new coding structure and the optimal HCBs contribute to the bit rate reduction.

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References

  1. 3GPP TS 26.401, Enhanced aacPlus General Audio Codec; General Description, v.8.0.0., 2008.
  2. 3GPP TS 26.405, Enhanced aacPlus General Audio Codec; Encoder Specification Parametric Stereo Part, v.8.0.0., 2008.
  3. ISO/IEC 14496-3, Information Technology–Coding of Audio-Visual Objects–Part 3: Audio, 2005.
  4. ISO/IEC 23003-1, Information Technology–MPEG Audio Technologies–Part 1: MPEG Surround, 2007.
  5. S. Beack et al., “Angle-Based Virtual Source Location Representation for Spatial Audio Coding,” ETRI J., vol. 28, no. 2, Apr. 2006, pp. 219-222. https://doi.org/10.4218/etrij.06.0205.0079
  6. K. Kim et al., “Improved Channel Level Difference Quantization for Spatial Audio Coding,” ETRI J., vol. 29, no. 1, Feb. 2007, pp. 99-102. https://doi.org/10.4218/etrij.07.0206.0149
  7. H.O. Oh, Y.W. Jung, H.S. Pang, D.S. Kim, and J. Lim, “Proposed Core Experiment on Pilot-Based Coding of Spatial Parameters of MPEG Surround,” ISO/IEC JTC1/SC29/WG11, M12549, 2005.
  8. H.S. Pang, J. Lim, and H.O. Oh, “Extended Pilot-Based Coding for Lossless Bit Rate Reduction of MPEG Surround,” ETRI J., vol. 29, no. 1, Feb. 2007, pp. 103-106. https://doi.org/10.4218/etrij.07.0206.0173

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  2. New Context-Adaptive Arithmetic Coding Scheme for Lossless Bit Rate Reduction of Parametric Stereo in Enhanced aacPlus vol.ed101, pp.12, 2009, https://doi.org/10.1587/transinf.2018edl8135