Decomposition of a stereo signal into the primary and ambient components is a key step to the stereo upmix and it is often based on the principal component analysis (PCA). However, major shortcoming of the PCA-based method is that accuracy of the decomposed components is dependent on both the primary-to-ambient power ratio (PAR) and the panning angle. Previously, a modified PCA was suggested to solve the PAR-dependent problem. However, its performance is still dependent on the panning angle of the primary signal. In this paper we proposed a new PCA-based primary-ambient decomposition algorithm whose performance is not affected by the PAR as well as the panning angle. The proposed algorithm finds scale factors based on a criterion that is set to preserve the powers of the mixed components, so that the original primary and ambient powers are correctly retrieved. Simulation results are presented to show the effectiveness of the proposed algorithm.

Authors: Baek, Yong-Hyun; Jeon, Se-Woon; Park, Young-cheol; Lee, Seokpil
Affiliations: Yonsei University, Wonju, Kwangwon-do, Korea; Yonsei University, Seoul, Korea; Korea Electronics Technology Institute (KETI), Seoul, Korea(See document for exact affiliation information.)
AES Convention: 133 (October 2012) Paper Number: 8754
Publication Date: October 25, 2012 Import into BibTeX
Subject: Spatial Audio
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=16496

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD 133Papers)   /conv/133/8754.pdf

Start a discussion about this paper!