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 Journal Forum

Watermark-Aided Pre-Echo Reduction in Low Bit-Rate Audio Coding

(Subscribe to this discussion)

Low bit-rate coding/decoding with standard AAC and MP3 coders smoothes attacks in transient signals and increases the pre-echo. A system is proposed for reducing pre-echo artifacts by embedding temporal envelope correction as watermarking data, which eliminates the need for an auxiliary communications channel. The restored signal is reconstructed at the receiver from two components: the decoded signal generated by the core decoder, and the temporal envelope of the original signal, which is represented by a few parameters that are transmitted as embedded data in the audio signal.

Authors:
Affiliations:
JAES Volume 60 Issue 6 pp. 431-443; June 2012
Publication Date:

Click to purchase paper or you can login as an AES member to see more options.

(Comment on this paper)

Comments on this paper

Default Avatar
Arijit Biswas
Comment posted August 15, 2012 @ 19:38:59 UTC (Comment permalink)

Very interesting paper and it was very nice to read.

However, I’ve got one question/comment:
Authors mention that “ARMA model is used to estimate the temporal envelope”.


I agree with the authors that ARMA model is efficient, but how does the authors guarantee stability of the ARMA model? I’m concerned because ARMA modeling using Prony’s Method is not guaranteed to be stable. See this link: http://www.mathworks.co.uk/help/toolbox/signal/ug/f11-7042.html
In case you have some references or used some techniques to guarantee the stability of the ARMA modeling using Prony (or any other method), I would be very interested to know.

Best Regards,
Arijit


Subscribe to this discussion

RSS Feed To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Join this discussion!

If you would like to contribute to the discussion about this paper and are an AES member then you can login here:
Username:
Password:

If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.

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