In this paper, we present a perceptual audio coding method that encodes the audio using perceptually salient envelope features. These features are found by passing the audio through a set of gammatone filters, and then computing the Hilbert envelopes of the responses. Relevant points of these envelopes are isolated and transmitted to the decoder. The decoder reconstructs the audio in an iterative manner from these relevant envelope points. Initial experiments suggest that even without sophisticated entropy coding a moderate bitrate reduction is possible while retaining good quality.
Authors:
Kabal, Peter; Thiemann, Joachim
Affiliation:
McGill University
AES Conference:
34th International Conference: New Trends in Audio for Mobile and Handheld Devices (August 2008)
Paper Number:
7
Publication Date:
August 1, 2008
Subject:
Audio for Mobile & Handheld Devices: Coding Technologies for Audio & Speech
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.
To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.
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.