AES Store

Journal Forum

Audibility of a CD-Standard A/DA/A Loop Inserted into High-Resolution Audio Playback - September 2007

Reflecting on Reflections - June 2014

Quiet Thoughts on a Deafening Problem - May 2014
1 comment

Access Journal Forum

AES E-Library

A Frequency-Domain Approach to Multichannel Upmix

A series of upmixing techniques for generating multichannel audio from stereo recordings are proposed. The techniques use a common analysis framework based on a comparison between the short-time Fourier transforms of the left and right stereo signals. An interchannel coherence measure is used to identify time-frequency regions consisting mostly of ambience components, which can then be weighted via a nonlinear mapping function, and extracted to synthesize ambience signals. A similarity measure is used to identify the panning coefficients of the various sources in the mix in the time-frequency plane, and different heuristic mapping functions are applied to unmix (extract) one or more sources, and perceptually based functions to repan the signals into an arbitrary number of channels. We illustrate the application of the various techniques in the design of a two-to-five channel upmix system.

JAES Volume 52 Issue 7/8 pp. 740-749; July 2004
Publication Date:

Click to purchase paper 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 $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!

Facebook   Twitter   LinkedIn   Google+   YouTube   RSS News Feeds  
AES - Audio Engineering Society