Jean-Louis’s scientific contributions

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Publications (32)

CES TERRITORIALITES qui se dessinent
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Figure 2: PCM Module uses the Pulse Code Modulation (PCM) technique, It is designed in such a way that speech can be 'digitized and synthesized at three different sampling frequencies: 4, 6 and 8 KHz. The module is built around an a,;alog to digi tal converter (A/D) used to digitize the speech signal and a digital to analog converter (D/A) to restitute the speech signal, A pair of low-pass fil t ers (MC145414) are used to filter undesirable noise, The second module uses a Continuously Variable Slope Delta (CVSD) modulation circuit, the HC-55564, manufactured by Harris Semiconductor, The module can encode speech at different bit rates since it is equipped with an on-board clock sampling circuit, It is also equipped with a pair of low-pass filters identical to the PCM module. A third s peech modul e , illustrated in figure 3, uses the Linear Predictive Coefficient (LPC) speech processor TMS5220 manufactured by Texas Instrument, The module can work i n two operating modes, First the 5220 speech processor can synthesize speech by reading the coefficients stored in a 128 ·Kbit-ROM designed by Texas Instrument, the Voice Synthesis M emory TMS6100, The TMS5220 Speech Processor may directly access up to 16 _ TMS6100 circuits with no exte.rnal hardware required, Such an arrangement would provide about 30 minutes of speech. The second operating mode allows the host processor to fetch from its own ·memory the vocabu 
Figure 3: LPC Module lary to be synthesized, The inconvenience of the second approach is that the host CPU must service the speech processor by performing a series of read and store of the LPC coefficients at a rate of approximatly 1200 bits per second, Inversely, in the first approach, the host processor is interrupted only when the speech processor has completed the synthesis of a word or a frame, Finally, the last speech module uses the CMOS SSI 263 phonetic speech synthesizer. circuit manufactured by Silicon Systems, It can be operated in two modes, At low bit rate, the speech quality is comparable to the speech produced by the Vot rex SC-OlA chip, In this operating mode the host processor only transmits the codes for the individual phonemes to be synthesized, This explains a low bit rate of approximatly 70 bits per second, In the second operating mode, it .is possible to dynamically program the content of the registers of the 263, 
Figure 4: Speech recognition block diagram 
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The Architecture of a Voice Interactive Evaluation System and its Application to Radio Frequency Selection in a Military Aircraft

February 1996

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Jean-Louis
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Des contrôles dans l'exploitation : avec application dans l'industrie mécanique /

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Jean-Louis

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docteur. rer. pol

Includes bibliographical references (p. 130). Thesis (doctoral)--Université de Berne.

Citations (2)

... In order to analyse the territorial organisation, and in the context of the lack of explicit spatial planning guidance form the Regional Council 1 , we will use the concept of polycentrism, which emerges as consensual European spatial planning objective (European Commission 1999). The idea of polycentrism is to attempt to escape from an unwanted centre-periphery trend model (Baudelle and Castagnède 2002). As public transport -the object of our assessment -relies on heavy flows, we will focus on the urban framework of the territories concerned. ...

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A Transport network for a City network: Analysing the quality of the public transport service in the Nord-Pas-de-Calais region
Le POLYCENTRISME en Europe: une vision de l'aménagement du territoire européen
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Bernard CASTAGNEDE

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... Le processus de l'étalement urbain et les dynamiques des espaces ruraux aux alentours de nos villes nous ont imposé de dépasser la dichotomie qui a opposé la ville à la campagne pendant les époques préindustrielle et industrielle (Schmitt et Goffette-Nagot, 2000). Loin du débat sur la suprématie de l'urbain (Lévy, 1999 ;Chalas, 2000) ou du rural (Kayser et al., 1994 ;Perrier-Cornet, 2002), nous considérons que les deux espaces se reproduisent mutuellement et composent une nouvelle forme de territorialité hybride (Debarbieux et Vanier, 2002, Vanier, 2005 (Thomsin, 2001). D'autres concepts viennent mettre l'accent sur les différences entre les deux extrêmes (ville / campagne), mais insistent aussi sur les gradients et les interrelations, comme le continuum urbain-rural (Pahl, 1966), les tiers espaces (Vanier, 2000) ou l'espace intermédiaire (Bonerandi et al., 2003). ...

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Interface ville/campagne et dynamiques des espaces périurbains d’une ville intermédiaire sud-méditerranéenne. L’exemple de Mostaganem (Algérie)City/countryside interface and dynamics of the peri-urban spaces of a South Mediterranean intermediate city. The case of Mostaganem (Algeria)
CES TERRITORIALITES qui se dessinent

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