By Topic

Perceptual quantisation of LPC excitation parameters

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Chang, W.-W. ; Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan ; Wang, D.-Y.

A new approach to wideband digital audio compression at 64 kbit/s is presented. This LPC coder features a sinusoidal excitation model and adaptive bit-allocation based on a mask-to-noise ratio perceptual measure. Owing to its localised spectral sensitivity, sinusoidal excitation representation can be shown to provide an ideal framework for incorporating an estimated masking threshold in the design of noise spectral shaping. Quantisation of LPC and excitation parameters is also examined. Simulation results indicate that sine waves are preferred to spectrally flat signals for use in excitation modelling, because in the former the estimated masking threshold can be more precisely implemented in the distribution of quantisation noise

Published in:

Vision, Image and Signal Processing, IEE Proceedings -  (Volume:145 ,  Issue: 3 )