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http://dx.doi.org/10.7776/ASK.2010.29.8.509

Mono-To-Stereo Blind Upmix Using Non-Negative Matrix Factorization and Decorrelator  

Choi, Keun-Woo (서울대학교 전기컴퓨터공학부 음향공학연구실)
Chon, Sang-Bae (서울대학교 전기컴퓨터공학부 음향공학연구실)
Lee, Seok-Jin (서울대학교 전기컴퓨터공학부 음향공학연구실)
Sung, Koeng-Mo (서울대학교 전기컴퓨터공학부 음향공학연구실)
Publication Information
The Journal of the Acoustical Society of Korea / v.29, no.8, 2010 , pp. 509-515 More about this Journal
Abstract
This paper presents a new method for upmixing mono signal to stereo signal with guaranteeing high stereophonic image quality (SIQ) and large apparent source width (ASW). The proposed method consists of analysis phase and synthesis phase. In analysis phase, a mono signal is first decomposed into multiple sound sources by the use of high-rank nonnegative matrix factorization. Then the multiple sources are clustered into two groups based on tonality criterion. In synthesis phase, one group is directly fed into left and right channels while the other group is decorrelated before being fed into each channel. Subjective tests reveals that the proposed method gives listener high SIQ and large ASW with minimizing timbral distortions.
Keywords
NMF; Mono Upmix;
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