A comparison of warped and conventional linear predictive coding

Frequency-warped signal processing techniques are attractive to many wideba nd speech and audio applications since they have a clear connection to the frequency resolution of human hearing. A warped version of linear predictiv e coding (LPC) is studied in this paper, The performance of conventional an d warped LPC algorithms are compared in a simulated coding system using lis tening tests and conventional technical measures. The results indicate that the use of warped techniques is beneficial especially in wideband coding a nd may result in savings of one bit per sample compared to the conventional algorithm while retaining the same subjective quality.