Browse > Article

A Perception Based Active Matrix Decoder with Virtual Source Location Information  

Moon, Han-Gil (DMC R&D center, Samsung Electronics, CO., LTD.)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.47, no.5, 2010 , pp. 18-24 More about this Journal
Abstract
In this paper, a new matrix decoding system using vector based Virtual Source Location Information (VSLI) is proposed as an alternative to the conventional Dolby Pro logic II/IIx system for reconstructing multi-channel output signals from matrix encoded two channel signals, Lt/Rt. This new matrix decoding system is composed of passive decoding part and active part. The passive part makes crude multi-channel signals using linear combination of the two encoded signals(Lt/Rt) and the active part enhances each channel regarding to the virtual source which is emergent in each inter channel. Since the virtual sources are related to the perceptual sound images in virtual sound field, the reconstructed multi-channel sound results in good dynamic perception and stable image localization. Moreover, the good channel separation is maintained with nonlinear trigonometric enhancing function.
Keywords
Multichannel audio; Matrix decoder; Active; VSLI;
Citations & Related Records
연도 인용수 순위
  • Reference
1 H. Moon, J. Seo, S. Beack, K. Sung "A multi-channel audio compression method with virtual source location information for MPEG-4 SAC," IEEE trans on Consumer Electronics, vol. 51, no. 4, pp. 1253-1259, Nov. 2005.   DOI   ScienceOn
2 ITU-R Recommendation, "Multi-channel stereophonic sound system with and without accompanying picture", International Telecommunication Union, BS. 775-1 1998.
3 ITU-R Recommendation, "Subjective Assessment of Sound Quality", International Telecommunication Union, BS. 562-3, Geneva, 1990.
4 Lexicon Inc., "Sound reproduction," US Patent no. 5136650, Aug., 1992.
5 DTS Inc., "Method of decoding two-channel matrix encoded audio to reconstruct multi-channel audio," WO Patent Pub. No. WO02/032186, Aug., 2003.
6 V. Pulkki, "Localization of Amplitude-Panned Virtual Sources II: three-dimensional panning," J. Audio Eng. Soc., vol. 49, no. 9, pp. 753-767, Sep., 2001.
7 West J. R, "Five-channel panning laws: an analytic and experimental comparison", Master's Thesis, Music Engineering, University of Miami, 1998.
8 G. Strang, Linear algebra and its application, Harcourt, 1988.
9 J. A. Fill and D. E. Fishkind, "The Moore- Penrose generalized inverse for sums of matrices", SIMAX, vol. 21, no. 2, pp 629-635, 1999.
10 Dolby labs, "Method for apparatus for audio matrix decoding," US Patent no. 7280664, Oct., 2007.
11 Dolby labs, "Matrix-encoded surround-sound channels in a discrete digital sound format," US Patent no. 6624873, Sep., 2003.