Title :
A comparison of warped and conventional linear predictive coding
Author :
Harma, Aki ; Laine, Unto K.
Author_Institution :
Media Signal Processing Res., Agere Syst., Murray Hill, NJ, USA
fDate :
7/1/2001 12:00:00 AM
Abstract :
Frequency-warped signal processing techniques are attractive to many wideband speech and audio applications since they have a clear connection to the frequency resolution of human hearing. A warped version of linear predictive coding (LPC) is studied. The performance of conventional and warped LPC algorithms are compared in a simulated coding system using listening tests and conventional technical measures. The results indicate that the use of warped techniques is beneficial especially in wideband coding and may result in savings of one bit per sample compared to the conventional algorithm while retaining the same subjective quality
Keywords :
all-pass filters; audio coding; filtering theory; linear predictive coding; speech coding; audio coding; codec; conventional LPC algorithms; conventional linear predictive coding; first-order all-pass filter; frequency resolution; frequency-warped signal processing; human hearing; linear predictive coding; listening tests; music signals; simulated coding system; speech signals; subjective quality; warped LPC algorithms; warped linear predictive coding; wideband audio applications; wideband coding; wideband speech applications; Audio coding; Auditory system; Frequency; Humans; Linear predictive coding; Nonlinear filters; Signal processing algorithms; Speech coding; Testing; Wideband;
Journal_Title :
Speech and Audio Processing, IEEE Transactions on
