56results about How to "Noise level" patented technology

An apparatus for removing a noise of a video signal is disclosed, by which a noise level can be effectively estimated to enhance an image quality of the video signal, by which the noise can be removed in a manner of effectively estimating a noise level though motion adaptive filtering, and by which blurring is prevented in the process of removing the noises. The present invention includes a temporal noise level estimation unit estimating a level of a temporal noise included in the video signal using a difference between two temporally consecutive videos, a noise correction unit correcting a noise estimated by the temporal noise level estimation unit, and a noise removal unit removing the noise included in the video signal using a level of the corrected noise.

In a voltage boost circuit for driving a fuel injector of an internal combustion engine, a high voltage developed in the voltage boost coil will be discharged into the battery power supply through the boost coil by electrically energizing a discharge switching element provided in parallel to the charging diode. If the overboost compensation overlaps a boost execution period, the end of the boost execution period will await starting of the overboost compensation.

The present invention relates to a particle comprising a non-metallic core having a fluorescent material and a metallic shell encapsulating the non-metallic core wherein the metallic shell has transparency for an electromagnetic radiation having a first wavelength to excite the said fluorescent material and reflectance for an electromagnetic radiation having a second wavelength emitted by the said fluorescent material to confine the electromagnetic radiation having the second wavelength in the metallic shell. This system allows for the excitation of optical cavity modes inside the particle even at sub-micron particle size. The cavity modes are extremely sensitive to any change of the dielectric environment of the particle. This sensitivity can be used for the construction of optical nano-biosensors. Another application of the system is that of a microscopic source for spherical light waves, which may find applications in digital inline holography and display technology.

Two-pump optical parametric devices (OPDs), and methods of operating the same, generate desired output signals and idlers having reduced stimulated Raman scattering (SRS) noise levels. When the two-pump OPD is used as a two-pump optical parametric amplifier (OPA), the pumps are polarized perpendicular to each other, and the lower-frequency sideband (signal or idler) is polarized parallel to the lower-frequency pump (perpendicular to the higher-frequency pump). The desired output may be an amplified signal or a generated idler. When the two-pump OPD is used as a two-pump optical frequency converter (OFC), the pumps can be polarized parallel to one another, in which case the signal and idler are both perpendicular to the pumps, or perpendicular to one another, in which case the lower-frequency sideband (signal or idler) is polarized parallel to the lower-frequency pump (perpendicular to the higher-frequency pump).

In an axial flow fan, for reducing fluid noise and further reducing the noise by suppressing solid-conveyed noise (structure-bone noise) generated by the vibration of an electric motor or the like, the axial flow fan is equipped with a propeller, a motor for driving the propeller, and a venturi portion disposed on the outer circumference side of the propeller and provided on its inner circumferential side with a bellmouth through which an air flow generated by the revolution of the propeller passes, wherein the bellmouth has an intake portion whose diameter contracts in a curved shape in the direction of the air flow, a cylindrical portion having a cylindrical shape, and a discharge portion whose diameter slantingly expands in the direction of the air flow.

The adjustment of stimulation signal amplitudes in capacitive touch sensor panels and/or styli to reduce power consumption while preserving satisfactory touch performance is disclosed, in particular in situations where the noise level is not significant and there is excess SNR margin. To accomplish this, one or more metrics can be measured, calculated or otherwise determined to use as a predictor of touch performance, and these metrics can be processed to determine the minimum stimulation voltage required to maintain acceptable touch performance.

The present application describes a device for active noise reduction in the range of a passenger seat of an airplane or a land-based or water-based vehicle, respectively, the elements of which are either integrated into the passenger seat, or are installed in the immediate vicinity thereof. In the immediate vicinity of the head region of a passenger seat, at least one measurement microphone is disposed, the measurement signal of which is lead to a signal processing device. An output signal in counter-phase and amplified with respect to the measurement signal is generated there, serving for driving a reproduction device disposed in the vicinity of the head region of the passenger seat. At least one monitoring microphone is provided in the vicinity of the head region of the passenger seat, the output signal of which is lead to a further input of the signal processing device.

A power clamp circuit for preventing unnecessary power supply leak current at a tolerable power supply noise level. A reference voltage circuit generates a reference voltage by reducing a positive voltage supplied from a first power supply terminal by a predetermined potential and supplies the reference voltage to a buffer circuit. The buffer circuit activates a transistor functioning as a clamp element based on the reference voltage to short-circuit the first and second power supply terminals.

Provided are a surface inspection method and a surface inspection apparatus that are capable of detecting scattered light from a contaminant particle and a defect at a good S/N even when the relative ratio of background scattered light to the total quantity of scattered light and the anisotropy of background scattered light in angular directions are not relatively large in a case where background scattered light deriving from the surface roughness of a semiconductor wafer has directivity in a direction of an elevation angle or an azimuthal angle and in a case where the directivity of background scattered light changes depending on positions on a wafer to be inspected. In surface inspection according to the present invention, by use of a plurality of photodetectors arranged in a plurality of directions, light scattered, diffracted or reflected on a surface of an object to be inspected or in the vicinity of the surface is detected and a plurality of signals obtained by this are subjected to weighted addition processing or weighted averaging processing by linear combination, whereby a contaminant particle and a defect on a surface of an object to be inspected and the like are detected. The size of a contaminant particle and a defect is calculated from results of the weighted addition processing or weighted averaging processing.

A motor vehicle door lock comprising a locking mechanism (1, 2) and a closing/opening device (3 to 7) including a drive (3, 4, 5), acting upon the locking mechanism (1, 2), wherein the drive (3, 4, 5) is configured as a linear drive (3, 4, 5).

A roller chain transmission comprises a sprocket having at least first teeth and second teeth having different tooth forms, the first teeth and second teeth being randomly arranged, and the number of the second teeth not exceeding four times of the number of the first teeth. The roller chain may also have pins of slightly differing diameters, randomly arranged along the length of the chain.

A video-signal processing method for measuring a noise level of an input video signal includes the steps of detecting an intra-field or intra-frame feature for each region that, is set in the input video signal, the intra-field or intra-frame feature representing a noise level in the input video signal within a field or frame; checking the intra-field or intra-frame feature against a noise-free-region threshold, and excluding regions with which the infra-field or intra-frame feature is less than the noise-free-region threshold from subjects of noise-level measurement; and outputting a result of noise-level measurement by statistically processing the intra-field or intra-frame features of regions remaining without being excluded.

There is provided a frequency synthesizer capable of improving phase noise. A sinusoidal signal with a frequency set by a frequency setting part is output as a digital signal from a set signal output part, and the digital signal is D/A-converted. A difference between a sinusoidal signal with a frequency corresponding to an output frequency of a voltage controlled oscillating part and a sinusoidal signal output from a D/A converting part is amplified by a differential amplifier, and an amplified signal is input via an A/D converting part to a means for extracting a phase difference between the aforesaid sinusoidal signals. A voltage corresponding to a signal being the result of integration of the phase difference is input as a control voltage to the voltage controlled oscillating part. Then, a gain of the differential amplifier is set larger than a maximum value of phase noise degradation of the A/D converting part, whereby the phase noise degradation of the A/D converting part is cancelled.

A vehicle AC generator has a stator winding formed of series-connected U-shaped conductor segments, with a plurality of connection portions, each formed of a pair of connected tip portions of respective conductor segments, protruding axially at one end of the stator core, with a flow of cooling air being impelled outward from the rotor along a flow direction that deviates from a radial direction, to pass between the connection portions. Each connection portion is oriented along a direction that deviates from a radial direction, to reduce air flow resistance and reduce audible noise caused by the air flow.

A driver circuit is configured as a frequency compensated differential amplifier having one input coupled to a first data signal and a second input coupled to a second data signal. Each stage of the differential amplifier is biased with a current source. The driver circuit generates a first output signal coupled to the input of a first transmission line and a second output signal coupled to the input of a second transmission line. The first and second output signals are generated as the difference between the first and second data signals amplified by a compensated gain. A compensation network that attenuates the low frequency components of the input signals relative to the high frequency components is coupled between current sources biasing the differential amplifier. The outputs of the first and second transmission lines are coupled to the inputs of a differential receiver that may or may not be frequency compensated.

A method for configuring blades of a wind turbine for low noise generation. The method includes providing at least one noise measuring device. The noise measuring device is arranged and disposed in a position to measure noise of the blades during rotation. The wind turbine is configured to include a rotational trigger, the rotational trigger being arranged to provide a signal at a predetermined rotational position of the wind turbine blades. One or more of the blades is configured with an aerodynamic modifying device. Noise level is measured with the noise measuring device during wind turbine operation. The noise produced by each of the blades is determined. The blades are configured in response to the noise determined for each of the blades. A method for measuring the noise level generated by an individual blade and a wind turbine configured for desired noise level are also disclosed.

The present invention produces strings of true random numbers, extracted from field emission of electrons from nano-size emitters (NSE). Electrons may be produced in a miniature, three-electrode vacuum element that consists of a NSE emitter attached to the cathode surface, a close proximity gate electrode and an accelerating electrode (anode). A miniature fast response electron detector may also be inserted into the vacuum vessel. The detector sensitivity may allow single electron detection, with a noise level much lower than the resulting single-electron signal. The accelerated electrons may be directed to the detector and produce electric signals with well-defined pulse height and pulse shape characteristics. The electronic system analyzes the signals from the detector and generates random numbers thereby.

The invention relates to a method for reducing interference in radio transmitters with feedback from the antenna end to the baseband side and to a transmitter applying the said method. In a Cartesian loop formed for the linearization of a transmitter, the levels of baseband input signals (s_I2, s_Q2) to a modulator are measured and the attenuation of a level control unit (210) following the modulator (203) is adjusted until the modulator input signal levels are sufficiently above the noise level. The adjustment may be carried out as a one-time procedure during the manufacturing process or repeatedly during the operation of the device. By means of the invention, the noise level of the output signal of a linearized transmitter can be made lower than in known transmitters. Moreover, the transmitter may utilize a cheaper and, from the point of view of manufacturing, easier 4modulator than known transmitters.

Provided is a video signal processing method of measuring a noise level of an input video signal, the method including the steps of: setting a plurality of areas in the input video signal and extracting a characteristic amount which is an index of the noise level of the input video signal for each area; detecting characteristic amounts suitable to a measurement of the noise level from among the characteristic amounts of the plurality of areas; and creating a histogram by using the detected characteristic amounts suitable to the measurement of the noise level and detecting the noise level by analyzing the histogram.

The present application relates to a breast pump. The breast pump has a chamber (12) and a membrane (22). The membrane (22) is receivable in the chamber (12) to separate the chamber (12) into first and second spaces (23, 24). The membrane (22) is also deformable in the chamber in response to a reduction of pressure in the first space (23) to cause a reduction of pressure in the second space (24). A limiter (16) is in the chamber (12) against which the membrane (22) is locatable to limit deformation of the membrane (22).