Emerging digital audio applications for broadcast radio and multimedia systems are presenting new challenges such as the need to code mixed audio content, error robustness, higher audio bandwidth and the need to deliver high quality audio at low bit rates demanding a paradigm shift in the existing low bit rate speech coding techniques. This paper describes the continuation of our research concerning low bit rate speech coding and enhancements in the recently introduced bandwidth extension toolkit, Audio Bandwidth Extension Toolkit (ABET). Several new modes of operation have been introduced in the codec with the innovative use of perceptual coding tools. In addition, a new mode in ABET is added to improve the efficiency of the temporal shaping tool, Multi Band Temporal Amplitude Coding (MBTAC), by exploiting the time and frequency correlation in signals. The structure of the codec and its performance in these modes of operation are detailed. Audio demos and further information is available at http://www.atc-labs.com/lbr/

Authors: Annadana, Raghuram; E. V., Harinarayanan; Ferreira, Anibel; Sinha, Deepen
Affiliations: ATC Labs; University of Porto(See document for exact affiliation information.)
AES Convention: 121 (October 2006) Paper Number: 6876
Publication Date: October 1, 2006
Subject: Audio Coding

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

No AES members have commented on this paper yet.

Subscribe to this discussion

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

Start a discussion!

If you would like to start a 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.