This paper suggests the simple higher-frequency band extension (HBE) method based on digital wavelet transform (DWT). The method estimates the missed band through the perceptual coding by using DWT filters. To estimate it from the input signal, the FIR type inverse filter of DWT analysis stage filter is designed. After synthesizing the output wave, we attenuate the overlapped band using the cutoff frequency to get more natural output wave. The method is implemented to behave in real time for variable type of mobile devices such as mobile handsets and mp3 players using ARM9 core as their processing units.
Author:
Oh, Sang Keun
Affiliation:
LG Electronics Institute of Technology
AES Conference:
34th International Conference: New Trends in Audio for Mobile and Handheld Devices (August 2008)
Paper Number:
8
Publication Date:
August 1, 2008
Subject:
Audio for Mobile & Handheld Devices: Signal Processing
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.