Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 15 of 15 for “"linear predictive coding"”.
-
Time-varying linear predictive coding of speech signals.
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
-
Speech recognition by computer: algorithms and architectures
… (a) Walsh Analysis, (b) Fourier Analysis and (c) Linear Predictive Coding. The Fourier Analysis algorithm made use of the Prime-number Fourier Transform technique. The Linear Predictive Coding algorithm made use of LeRoux and Gueguen's method for calculating the coefficients. The system was …
-
Dialects, Sex-specificity, and Individual Recognition in the Vocal Repertoire of the Puerto Rican Parrot (Amazona vittata)
… bird-call pairing, sonagraphic analysis, and linear predictive coding. Sonagraphic analyses in combination with linear predictive coding techniques show the most promise as tools in voice recognition of the parrot, however, further research will be necessary to determine how reliable voice …
-
Policies and Mechanisms for Networked Control Systems
… extension to illustrate the utility of using linear predictive coding to reduce bandwidth usage."
-
Novel Pitch Detection Algorithm With Application to Speech Coding
… MAWT uses feature extraction, and ACR applied on Linear Predictive Coding (LPC) residuals, with a wavelet-based refinement step. MAWT opens the way for a unique approach to modeling: although speech is divided into segments, the success of voicing decisions is not crucial. Experiments demonstrate …
-
A study and comparison of digital speech systems
… autocorrelation and covariance formulations of linear predictive coding are compared for varying length segments of synthetically produced vowel sounds. The two formulations are also compared on vowel sounds contaminated with varying amounts of additive white noise. The two formulations were …
-
Implementation of a Connected Digit Recognizer Using Continuous Hidden Markov Modeling
… signal processor manufactured by Analog Devices. Linear predictive coding (LPC) analysis was first performed on a speech signal to model the characteristics of the vocal tract filter. A 7 state continuous HMM with 4 mixture density components was used to model each digit. The Viterbi reestimation …
-
Wireless Sensor Integrated Tool for Characterization of Machining Dynamics in Milling
… is used in conjunction with a data dependent linear predictive coding algorithm to demonstrate effective prediction of chatter frequencies from stable cutting.</p>
-
Improvements to a Real-Time, Satellite-Derived Surface Current Product (OSCAR) and Evaluation in the Intra-American Sea
… combined with extrapolated values computed using linear predictive coding for use in the Ocean Surface Currents Analysis, Real-time (OSCAR) is developed and tested. This method is implemented by Earth and Space Research (ESR) to produce operational height fields that are in turn used to calculate …
-
An investigation of speech synthesis parameters
… model. Types (2,3,4) are three varieties of linear predictive coding (LPC) parameters. There are five parts to the investigation: (1) an historical survey of models for speech synthesis and their problems; (2) a formal description of the models and their analytical relationships; (3) an …
-
Objective Evaluation of Tracheoesophageal Speech Quality
… glottal noise measures and features derived from linear predictive coding. In addition, we have applied timefrequency decomposition techniques and extracted a number of features for quantifying the speech quality. Discrete wavelet, wavelet packet and matching pursuit analysis were performed. …
-
A Study in Speaker Dependent Medium Vocabulary Word Recognition: Application to Human/Computer Interface
… to extract key voice features, called Median Linear Predictive Coding (MLPC). MLPC reduces the HCI calculation time and gives an improved recognition rate. This design eliminated the typical Multi-layer Perceptron (MLP) problems of complexity growth with vocabulary size, the large training …
-
Hypernasal Speech Analysis via Emperical Mode Decomposition and the Teager-Kasiser Energy Operator
… acoustical analysis methods of using a linear source model follow the premise that differences between normal and hypernasal speech can be distinguished by shifts or power changes in the formant frequencies and/or the widening (or narrowing) of the formant bandwidths. Such a premise, …
-
A low cost digital vocoder using linear predictive techniques
… cost digital vocoder based on the principle of linear predictive coding (LPC). This system eliminates many of the complexities which have evolved in LPC vocoders over recent years while preserving good quality speech at low bit rates.<br/><br/>In conventional LPC systems voiced speech is …
-
Speech Recognition under Stress
… and less energy compared to neutral. The Linear Predictive Coding (LPC) cepstral feature analysis is used to obtain the observation vector and the input vector for DTW, HMM, and stress compensation. Both HMM and HCNN consist of training and recognition stages. Training stage is to form …