Abstract: An improvement to system clock synchronization corrector in a digital transceiver allows the generation of a phase error correction signal for use in an imbedded clock synchronization control loop without the use of additional transmitted information or additional external circuitry. The system allows a transceiver to achieve timing and synchronization lock to a system master clock, such as a T1 or E1 clock, by triggering a counter to supply a count responsive to a higher-frequency replica of the local clock signal with the network clock signal. A network timing reference unit generates a phase error offset by clocking data into comparison registers in response to the maximum counter values. Subsequent counter values are mathematically combined to generate a series of phase offset samples. The phase error samples may be stored and or further manipulated to generate a phase error correction signal for use in a clock synchronization control loop.

Abstract: Approaches to generating clock signals are presented in which a signal is received from a line and a clock signal is generated as a function of the received signal. The received signal has portions that are correlated to a cyclostationary disturbance that is present on the line. Hence, by setting the rising edge and the falling edge of the clock as a function of the received signal may result in a clock signal that is substantially synchronous to the cyclostationary signal on the line.

Abstract: To obtain improved readability of a liquid crystal display screen under varied conditions of ambient luminosity, it is possible to increase the dynamic range of variation of the polarizing voltage. However, this leads to an increase in the electrical power consumption and to contrast reversal defects. To prevent this phenomenon, it is proposed not to modify the dynamic range of variation of polarizing voltage but to shift this range towards the lower voltages when the ambient luminosity increases or towards the higher voltages when the ambient luminosity diminishes. Thus, the white level is favored under high ambient luminosity and the black level is favored under low or normal luminosity.

Abstract: An ADSL system for operating in a time duplex system that provides alternative configurations for limiting crosstalk in a broadband network is disclosed. The ADSL system introduces a trial bitmap profile configuration to maximize the bit rate at which information is transmitted, regardless of network topology. In a simplified embodiment, a composite signal to noise ratio is derived from a minimum far end crosstalk signal to noise ratio and a minimum near end crosstalk signal to noise ratio. A maximum bit rate for the transfer of information, which is directly related to the derived composite SNR, is then determined. Information is then transmitted simultaneously between an asymmetric digital subscriber line central office and an asymmetric digital subscriber line customer premise at the determined maximum bit rate.

Abstract: Optical devices using thin optical films to adapt the characteristics of a light radiation. An optical device includes an optical structure and thin optical films interposed in the path of a light radiation that gets propagated towards the optical structure. The optical films are placed in an enclosed space having dimensions that are greater than the dimensions of the optical films so that the latter are maintained by a float mounting that allows each of them freedom of movement. The device prevents mechanical strains created by differential thermal expansion. Such optical devices may find particular application to liquid crystal display screens.

Abstract: The invention relates to a device for illuminating a liquid crystal screen. The device comprises a light box (1) located behind the screen (2). The light box (1) comprises a plurality of light sources (4). The device further comprises first means (3) to power the light sources (4). The first means (4) comprise second means enabling, under steady conditions, at least one of the light sources to be extinguished while the other sources remain lit.

Abstract: A system and method for modifying symbol duration for the efficient transmission of information in a time duplex noise environment is disclosed. In a simplified embodiment, the system modifies the length of Discrete MultiTone (DMT) symbols, thereby providing a system wherein a first half of the DMT symbols are transmitted entirely during a period in which there is far end crosstalk (FEXT) noise, and a second half of the DMT symbols are transmitted entirely during a period in which there is near end crosstalk (NEXT) noise. Preferably, the duration of each DMT symbol is selected to be 0.25 ms such that exactly ten DMT symbols fall within a time duplex period of 2.5 ms. As such, during a FEXT period, exactly five DMT symbols are transmitted, and during a NEXT period, exactly five DMT symbols are transmitted. Therefore, in each TTR period, an additional DMT symbol, with modified length, is transmitted during the FEXT period, during which information is transmitted at a high bit rate.

Abstract: The headlight comprises a light source, a reflector having a base surface that is selected to form images of the source in a determined distribution in a lighting direction that is axial and horizontal, and a closure glass. According to the invention, the closure glass is essentially free from deflecting stripes and the reflector includes, over at least a portion of its surface, a plurality of zones in which said base surface is replaced by substitution surfaces of outlines defined by projecting a plane array of polygonal zones onto the base surface, the plane array being defined as a function of a predetermined distribution of light flux. The array of zones corresponds to the array that would have been obtained if it had been an array of stripe zones formed on the closure glass, and the differential offset in a horizontal plane between the base surface and each substitution surface corresponds to the profile that the corresponding stripe would have had if it had been formed on the closure glass.

Abstract: A layout method for formatting and reprocessing of structured documents containing text and graphics is employed by a formatting module. The method first performs reading of the generic logical structure, the specific logical structure, and the generic layout structure, in order to create a specific layout structure gradually by a plurality of recursive layout processes.

Abstract: In a method of manufacturing a flux-recovering mirror for a motor vehicle signaling or lighting device a base reflecting surface is provided. Mutually spaced apart base points are distributed in at least one zone of the surface. A randomly determined correcting offset is attributed to each base point so that each base point is associated with a corrected point situated on the normal to the base surface at said base point and located at a random distance from said base point. A corrected smooth surface passing through the corrected points is thus defined in the zone to form a mirror whose reflecting surface in said zone is constituted by said correcting smooth surface. The invention also relates to a headlight fitted with a mirror having properties of distributing images randomly. The invention is also applicable to making light beams more uniform.