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.
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Showing 1 to 14 of 14 for “"Speech coding"”.
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Application of wavelets to speech coding
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993.
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Novel Pitch Detection Algorithm With Application to Speech Coding
… a novel method for accurate pitch detection and speech segmentation, named Multi-feature, Autocorrelation (ACR) and Wavelet Technique (MAWT). 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 …
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Vector quantization applied to speech coding in the wireless environment
… thesis describes the development of the Voice Coding Development and Research (VoCoDeR) System, a software tool for testing and development of new speech coding methods. This tool enables a researcher to build a voice encoder and speech filters, determine an optimal bit allocation scheme, …
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A modular approach to speech enhancement with an application to speech coding
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and, Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Speech Coder using Line Spectral Frequencies of Cascaded Second Order Predictors
A major objective in speech coding is to represent speech with as few bits as possible. Usual transmission parameters include auto regressive parameters, pitch parameters, excitation signals and excitation gains. The pitch predictor makes these coders sensitive to channel errors. Aiming for …
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Cascade RLS with Subsection Adaptation
Speech coding or speech compression is one of the important aspects of speech communications nowadays. By coding the speech, the speed needed to transmit the digitized speech, called the bit rate, can be reduced. This means that for a certain speech communications channel, the lower the bit rate of …
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On speech processing
… important ways of communication between humans. Speech processing refers to the technology of speech signal transformations for more efficient storage and transmission, for enhanced intelligibility and ease of assimilation. According to the different purpose as above, technologies on speech …
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Lossless audio compression of speech and voice
… with the rapid demand for multimedia data. Speech and voice compression is one of applications in this field. Although there are a lot of techniques used in speech coding, new algorithms need to be developed to achieve better performance. Our research focus is on lossless speech and voice …
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VLSI implementation of an efficient method for the computation of line spectral frequencies
<p>In speech coding applications using linear predictive techniques, the computation of line spectral frequencies (LSFs) from the predictor coefficients is an extremely computationally intensive task. The unique properties of the symmetric and antisymmetric polynomial roots limit the region which …
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Using a low-bit rate speech enhancement variable post-filter as a speech recognition system pre-filter to improve robustness to GSM speech
Performance of speech recognition systems degrades when they are used to recognize speech that has been transmitted through GS1 (Global System for Mobile Communications) voice communication channels (GSM speech). This degradation is mainly due to GSM speech coding and GSM channel noise on speech …
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Low bit-rate speech encoding for digital mobile radio
The need for low bit-rate speech coding is the result of growing demand on the available radio bandwidth for mobile communications both for military purposes and for the public sector. To meet this growing demand it is required that the available bandwidth be utilized in the most economic way to …
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Automated Testbench Generation for Communication Systems
… methods, a VHDL model was constructed for the speech-coding channel of the Global System for Mobile Communication (GSM). GSM is the Pan-European digital mobile telephony standard specified by the European Telecommunication Standards Institute (ETSI). This thesis emphasizes the error detection …
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A comparison of features for large population speaker identification
Speech recognition systems all have one criterion in common; they perform better in a controlled environment using clean speech. Though performance can be excellent, even exceeding human capabilities for clean speech, systems fail when presented with speech data from more realistic environments …
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ΣΥΣΤΗΜΑ ΣΥΝΘΕΣΗΣ ΟΜΙΛΙΑΣ ΣΤΗΝ ΕΛΛΗΝΙΚΗ ΓΛΩΣΣΑ ΜΕ ΑΠΕΡΙΟΡΙΣΤΟ ΛΕΞΙΛΟΓΙΟ
IN THIS THESIS WE PRESENT THE REALIZATION OF A SPEECH SYNTHESIS SYSTEM FOR THE GREEK LANGUAGE WITH UNLIMITED VOCABULARY. THE THESIS CONSISTS OF A THEORETICAL PART, AN EXPERIMENTAL/REALIZATION PART AND A PART WITH MEASUREMENTS AND THEIR RELATIVE MERIT. IN THE THEORETICAL PART SPEECH SYNTHESIS IN …