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This paper presents a stereo-to-multichannel upmix algorithm based on source separation method. In the conventional upmix algorithms, panning source and ambient components are decomposed or separated by adaptive algorithm, i.e. least-squares (LS) or least-mean-square (LMS). Separation performance of those algorithms is easily influenced by primary to ambient energy ratio (PAR). Since PAR is time-varying, it causes the energy fluctuation of separated sound sources. To prevent this problem, we propose a robust separation algorithm using pseudo inverse matrix. And we propose a novel post-scaling algorithm to compensate for the influence of interference with considering desired multichannel format. Performance of the proposed upmix algorithm is confirmed by subjective listening test in ITU 3/2 format.
Author (s): Jeon, Se-Woon; Park, Young-Cheol; Lee, Seok-Pil; Youn, Dae-Hee
Affiliation:
Yonsei University, Seoul, Korea; Yonsei University, Gangwon, Korea; Korea Electronics Technology Institute (KETI), Seoul, Korea
(See document for exact affiliation information.)
AES Convention: 128
Paper Number:7976
Publication Date:
2010-05-06
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Session subject:
Recording, Production, and Reproduction—Multichannel and Spatial Audio
Permalink: https://aes2.org/publications/elibrary-page/?id=15273
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Jeon, Se-Woon; Park, Young-Cheol; Lee, Seok-Pil; Youn, Dae-Hee; 2010; Robust Representation of Spatial Sound in Stereo-to-Multichannel Upmix [PDF]; Yonsei University, Seoul, Korea; Yonsei University, Gangwon, Korea; Korea Electronics Technology Institute (KETI), Seoul, Korea; Paper 7976; Available from: https://aes2.org/publications/elibrary-page/?id=15273
Jeon, Se-Woon; Park, Young-Cheol; Lee, Seok-Pil; Youn, Dae-Hee; Robust Representation of Spatial Sound in Stereo-to-Multichannel Upmix [PDF]; Yonsei University, Seoul, Korea; Yonsei University, Gangwon, Korea; Korea Electronics Technology Institute (KETI), Seoul, Korea; Paper 7976; 2010 Available: https://aes2.org/publications/elibrary-page/?id=15273