Warped linear prediction (WLP) in speech and audio processing
نویسندگان
چکیده
In this paper linear prediction process is applied to frequency warped signals. The warping is realized by using orthonormal FAM' functions. The general formulation of WLP is given and effective realizations with allpass filters are studied. The application of auditory WLP to speech coding and speech recognition has given good results.
منابع مشابه
Alternatives for Warped Linear Predictors
Linear Prediction (LP) is a well-known compression tool for coding speech and audio signals. By employing a frequency-warping technique, an extension has been proposed called Warped Linear Prediction (WLP). WLP enables controlling the degree at which details in specific regions in the spectral envelope can be conserved. Therefore, the coder can be tuned to a particular application. However, the...
متن کاملA warped linear-prediction-based subband audio coding algorithm
In this paper, a novel audio coding algorithm is proposed where the warped linear prediction (WLP) technique is employed to construct a perceptual preand post-filter for subband audio coding. A modified signal-to-mask ratio (SMR) calculation is given for subband coding of the WLP residuals of audio signals. The concept of perceptual entropy (PE) is extended to subband coding, resulting in the s...
متن کاملSpeech synthesis using warped linear prediction and neural networks
A text-to-speech synthesis technique, based on warped linear prediction (WLP) and neural networks, is presented for high-quality individual sounding synthetic speech. Warped linear prediction is used as a speech production model with wide audio bandwidth yet with highly compressed control parameter data. An excitation codebook, inverse filtered from a target speaker’s voice, is applied to obtai...
متن کاملWideband Parametric Speech Synthesis Using Warped Linear Prediction
This paper studies the use of warped linear prediction (WLP) for wideband parametric speech synthesis. As the sampling frequency is increased from the usual 16 kHz, linear frequency resolution of conventional linear prediction (LP) cannot efficiently model the speech spectrum. By using frequency warping that weights perceptually the most important formant information, spectral models with bette...
متن کاملWarped Linear Prediction for Improved Perceptual Quality in the Scelp Low Delay Audio Codec (w-scelp)
The SCELP (Spherical Code Excited Linear Prediction) audio codec, which has recently been proposed for low delay audio coding [5], is based on linear prediction (LP). It applies closed-loop vector quantization employing a spherical code which is based on the Apple Peeling code construction rule. Frequency warped signal processing is known to be beneficial especially in the context of wideband a...
متن کامل