AES E-Library

AES E-Library

Investigation on Balanced-Delay Filter-Bank for Encoding Multi-Channel Audio Signals

Document Thumbnail

Various MPEG audio standards, such as MPEG Surround, MPEG Advanced Audio Coding (AAC), MPEG Spatial Audio Object Coding (SAOC) as well as MPEG-H 3D Audio, employ a similar powerful hybrid filter-bank. Even though the filter-bank introduces an unbalanced delay, the overall filter distortion is very low. However, when MPEG Surround encodes multi-channel audio, such as 22.2 channels, the whole filter-bank structure can form a multi-layer filtering. In this paper, we investigate a case of balancing the delay for minimizing the overall filter distortion. The results of the experiments using 22.2 multi-channel audio signals show that the proposed balanced-delay filter-bank is capable of increasing the Signal-to-Noise Ratio up to 8 dB.

AES Convention: eBrief:
Publication Date:

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

The Engineering Briefs at this Convention were selected on the basis of a submitted synopsis, ensuring that they are of interest to AES members, and are not overly commercial. These briefs have been reproduced from the authors' advance manuscripts, without editing, corrections, or consideration by the Review Board. The AES takes no responsibility for their contents. Paper copies are not available, but any member can freely access these briefs. Members are encouraged to provide comments that enhance their usefulness.

Start a discussion about this paper!

AES - Audio Engineering Society