AES Store

Journal Forum

Perceptual Effects of Dynamic Range Compression in Popular Music Recordings - January 2014
4 comments

Accurate Calculation of Radiation and Diffraction from Loudspeaker Enclosures at Low Frequency - June 2013
9 comments

New Measurement Techniques for Portable Listening Devices: Technical Report - October 2013
1 comment

Access Journal Forum

AES E-Library

A Subband Analysis and Coding Method for Downmixing Based Multichannel Audio Codec

In present downmixing based multichannel coding standard, the downmixing process causes the ‘tone leakage’ problem by mixing different channels into one channel. In this paper a novel multichannel analysis method is proposed to reduce ‘tone leakage’ phenomenon with additive side information, the basic idea is to find subbands with largest spectrum difference and coding their spectrum envelope information. By analyzing the decoded signals, ‘leakage tones’ are identified and attenuated, then the original ones are reconstructed which meantime retain the original interchannel level difference (ICLD) of subbands unchanged. Result shows our method can improve subjective quality compared with HE-AAC (v2) codec with bit rate increasing slightly.

Authors:
Affiliation:
AES Convention: Paper Number:
Publication Date:
Subject:

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