| Patent application number | Description | Published |
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| 20090207959 | METHOD AND DEVICE FOR DOWNCONVERTING THE SAMPLING FREQUENCY OF A DIGITAL SIGNAL, FOR EXAMPLE IN A NON-INTEGER FREQUENCY RATIO - A method for converting a sampling frequency of a digital signal sampled at a first sampling frequency includes receiving digital signal input samples, and forming output samples corresponding to a second sampling frequency based on the digital signal input samples and an interpolation filter. The first sampling frequency may be larger than the second sampling frequency. The method may further include delivering the output samples. Forming output samples includes, for each of the digital signal input samples, updating current values of N successive output samples with N contributions. The N contributions may be respectively calculated based on a value of a current input sample of the digital input samples weighted by values of N filter coefficients associated with the current input sample, N being fixed and identical for all the digital signal input samples regardless of a value of the conversion ratio between the first and second sampling frequencies. | 08-20-2009 |
| 20100020903 | METHOD AND DEVICE FOR PROCESSING THE DC OFFSET OF A RADIOFREQUENCY RECEPTION SUBSYSTEM - A method may compensate for direct current (DC) offset in a radio frequency reception device. The method may include partitioning an analog portion of the reception device into a plurality of zones, for each zone, calibrating initial DC offset compensation to be applied within an operating range of a respective zone, the operating range of the other zones being limited to a threshold operating range, and determining DC offset compensation to be applied to the reception device throughout the operating range based on the basic DC offset compensations. | 01-28-2010 |
| 20100022214 | METHOD AND DEVICE FOR PROCESSING THE DC OFFSET OF A RADIOFREQUENCY RECEPTION SUBSYSTEM - A method may compensate for direct current (DC) offset in a radio frequency reception device. The method may include partitioning an analog portion of the reception device into a plurality of zones, for each zone, calibrating initial DC offset compensation to be applied within an operating range of a respective zone, the operating range of the other zones being limited to a threshold operating range, and determining DC offset compensation to be applied to the reception device throughout the operating range based on the basic DC offset compensations. | 01-28-2010 |
| 20100046669 | METHOD AND SYSTEM FOR PROCESSING IMPERFECTIONS OF A RADIO FREQUENCY TRANSMISSION SUBSYSTEM AND COMMUNICATION APPLIANCE INCORPORATING SUCH A TRANSMISSION SUBSYSTEM - A method processes defects in a radio frequency transmission subsystem due to elements therein. The defects may include mismatch between two channels in phase quadrature in the transmission subsystem and a transposition signal leaking from a first frequency transposition stage of the transmission subsystem. The method may include calibration processing including estimating compensation parameters representative of the defects. The estimating may include delivering, into the transmission subsystem upstream of the elements creating the defects, a reference signal having a reference frequency, obtaining, downstream of the first transposition stage, of a resultant reference signal, and obtaining, from the resultant reference signal, of an approximate value for each compensation parameter. The method also may include compensating for the defects by injecting the approximate values into the transmission subsystem. | 02-25-2010 |
| Patent application number | Description | Published |
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| 20090032712 | METHOD FOR DETECTING A SPRAY OF WATER AT THE REAR OF A VEHICLE - A method for detecting a phenomenon affecting visibility generated by an automotive vehicle, comprising the steps of emitting a first beam of light, which beam of light can be reflected by an obstacle; emitting a second reference beam of light using a second emitting source; receiving on a receiver the reflected beam of light resulting from the first beam of light being reflected by an obstacle, and the second beam of light sent directly to the input of the receiver; generating one or more detection signals as a function of a combination of the reflected beam of light in the event of an obstacle and a reference beam; and comparing the modulation of one or more detection signals generated using reference data. According to the invention, the first and second beams of light are infra-red beams, and they are directed towards the rear of the vehicle. | 02-05-2009 |
| 20090046894 | SYSTEM FOR THE DETECTION BY A MOTOR VEHICLE OF A PHENOMENON THAT INTERFERES WITH VISIBILITY - A process for the detection from a vehicle of a visibility interference phenomenon, comprising the following steps: the emission of a beam of light to illuminate the rear of the vehicle, the beam of light being emitted into a field of vision of a camera mounted in the vehicle, and the determination of a presence and the nature of a visibility interference phenomenon on the basis of at least one image captured by the camera. | 02-19-2009 |
| 20090118909 | PROCESS FOR DETECTING A PHENOMENON LIMITING THE VISIBILITY FOR A MOTOR VEHICLE - A process and system for detecting a phenomenon limiting the visibility for a motor vehicle. The process and system comprises the steps of determining at least one point of interest in an image captured of the environment of the vehicle (CALC_H(I)); determining a region of interest in the image (CALC_ROI(I)); determining a graph of different levels of grey on the basis of said region of interest (CALC_CL(ROI)), and determining an area in said graph of different levels of grey around said point of interest (CALC_A(CL, H)). | 05-07-2009 |
| 20090128309 | METHOD OF DETECTING A VISIBILITY INTERFERENCE PHENOMENON FOR A VEHICLE - A method of detecting a visibility interference phenomenon for a motor vehicle. The method includes the steps of: determining a region of interest (ROI) in an acquired image (I) of the environment (E) of the vehicle (V); determining a grey-level curve (CL) from the region of interest (ROI); calculating at least one tangent (TG) from at least one point of interest (PT) in the grey-level curve (CL); and determining a directing coefficient (CF) from the tangent (TG). | 05-21-2009 |
| 20100157614 | SWITCHING PROCEDURE OF THE MOTOR VEHICLE HEADLIGHT LIGHTING MODE - An automatic headlight switching procedure for motor vehicles, designed to emit a beam of light from one lighting mode to another lighting mode. The process features the steps of when the headlights are in a first lighting mode, detecting the backscatter of the headlight beam onto a phenomenon of visibility disturbance; increasing the lighting range of the headlight beam in relation to a maximum authorized range in accordance with the detected backscatter; and switching the headlights to a second lighting mode when the backscatter is below a first determined threshold. | 06-24-2010 |
| 20110013839 | PROCEDE DE DETERMINATION D'UNE REGION D'INTERET DANS UNE IMAGE - A system and method for determining a region of interest in an image, characterized in that it comprises the following steps:
| 01-20-2011 |
| 20110019922 | System and method for defining a search window - A system and method for defining a window to search a region of interest for processing a road image, the search window having a longitudinal orientation directed according to the height of the image and being laterally delimited by two edges. The shape of the search window is adapted to the road configuration by defining at least one non-vertical portion on one of the edges. A preferred application is the processing of road images for determining visibility distances in foggy weather. | 01-27-2011 |
