49results about How to "Eliminate noise components" patented technology

In a motion detection device that detects motion from two frames of a video signal, a pattern matching detector determines pattern similarity between pixel blocks centered on a pixel of interest in the two frames to detect pattern motion. An edge detector detects edge presence and direction in a vicinity of the pixel of interest. A frame difference detector generates a smoothed frame difference signal for the pixel of interest. The smoothing is carried out within appropriate extents selected according to the detected pattern motion and edge direction. A motion information corrector generates motion information for the pixel of interest from the frame difference signal. Appropriate selection of the smoothing extent reduces motion detection mistakes. The motion information is useful in motion adaptive video signal processing.

An apparatus and a method that achieve physical separation of sound sources by pointing directly a beam of coherent electromagnetic waves (i.e. laser). Analyzing the physical properties of a beam reflected from the vibrations generating sound source enable the reconstruction of the sound signal generated by the sound source, eliminating the noise component added to the original sound signal. In addition, the use of multiple electromagnetic waves beams or a beam that rapidly skips from one sound source to another allows the physical separation of these sound sources. Aiming each beam to a different sound source ensures the independence of the sound signals sources and therefore provides full sources separation.

A solid-state imaging apparatus includes: a plurality of light-receiving elements which are arranged by rows and columns; a plurality of vertical transfer units each of which is arranged for a corresponding column of the light-receiving elements, and is operable to vertically transfer a plurality of signal packets and a dummy packet in a packets-mixing mode, the signal packet including charges read from the light-receiving elements, the dummy packet being a packet other than the signal packets, and N columns of the vertical transfer units forming one column group; a plurality of holding units which are arranged in final stages of the vertical transfer units in N columns except M columns in the column group, and each of which is operable to mix, hold, and vertically transfer charges of the signal packets and the dummy packet without depending on vertical transfer from upstream of the corresponding vertical transfer unit; a horizontal transfer unit operable to mix, hold, and horizontally transfer the charges transferred from the holding units or the vertical transfer units in the M columns in the column group; and a driving unit operable to drive the vertical transfer units, the holding units, and the horizontal transfer unit, wherein the driving unit is operable to drive, in the packets-mixing mode, the holding units and the horizontal transfer unit to generate a first mixed packet and a second mixed packet in the horizontal transfer unit, the first mixed packet includes: a plurality of signal packets belonging to a same row and neighbor columns of a same color; and a dummy packet belonging to a same column as the signal packets, and the second mixed packet includes no signal packet but a plurality of dummy packets in a same column as the signal packets included in the first mixed packets.

An improved heart rate monitor is provided that can detect and distinguish a heartbeat from an otherwise contaminated system with noise components potentially larger than the signal of interest. Embodiments of the inventive monitor have an amplification system that eliminates large noise components so as not to saturate the system during detection of a desired low amplitude signal. In embodiments the elimination of noise components is accomplished through wavelet decomposition, and the removal of undesired components including interference components during adaptive gain control (AGC), in addition to hunting algorithms which minimize the error with techniques such as neural network least mean squares type back propagation algorithms.

In a reflection type optical fiber electric current measurement apparatus, a standardization reference signal (Xr), which is defined by the intensity (Pr) of the optical reference signal transmitted through a partial transmission mirror by using a reflector (111B) provided in one end of a sensor fiber as the partial transmission mirror, is subtracted from a standardization detection signal (Xs), which is defined by the intensity (Ps) of the optical detection signal obtained from the light reflected at the partial transmission mirror. Thereby, it is possible to remove noise caused by fluctuation in the polarization state (B) as well as fluctuation in the luminescence intensity (A) of the light source.

An apparatus and a method that achieve physical separation of sound sources by pointing directly a beam of coherent electromagnetic waves (i.e. laser). Analyzing the physical properties of a beam reflected from the vibrations generating sound source enable the reconstruction of the sound signal generated by the sound source, eliminating the noise component added to the original sound signal. In addition, the use of multiple electromagnetic waves beams or a beam that rapidly skips from one sound source to another allows the physical separation of these sound sources. Aiming each beam to a different sound source ensures the independence of the sound signals sources and therefore provides full sources separation.

An apparatus and method for extracting an optical clock signal are provided. The method includes splitting a predetermined polarization component from an input optical signal, selecting frequency components for clock signal extraction from the predetermined polarization component and amplifying the selected frequency components, rotating the amplified frequency components by a predetermined angle and then reflecting them, amplifying the reflected frequency components and removing noise from the amplified frequency components using a Fabry-Perot filter, and obtaining a beat frequency component from the frequency components from which noise has been removed using the Fabry-Perot filter to extract a clock signal. Accordingly, influence of the pattern of the input optical signal is reduced and the apparatus and method are provided at low price.

A biological optical measuring apparatus includes a light source probe and a light receiving probe, one of which is provided with a pressure sensor to detect a contact pressure of a skin of a subject. Pairs of plural values of the contact pressure and light detection signals are previously recorded as calibration data, an estimated value of a false signal is derived from a detection value of the pressure sensor at primary measurement and the calibration data, and a measurement signal waveform in which a noise component due to a movement of the subject is removed is acquired by subtracting the estimated value from a light measurement signal.

The invention relates to an image noise reduction method of Contourlet transformation region, wherein it comprises: translating the input image with noise; using Contourlet transformation to decompose said image at multiple sizes and directions, and in the Contourlet transformation region, using minimum Bayesian risk function to evaluate the Contourlet region factor; then processing Contourlet inverse transformation and inversed translating to obtain the noise reduced image; then repeating aforementioned steps, linearly averaging the noise reduced image, to obtain last noise reduced image. The invention can improve the quality of noise reduced image, to provide full and accurate target and background information, to be used in optical imaging, target detecting and safety detecting systems.

The invention relates to the field of electronics, and discloses an isolated type power circuit, and a circuit and method for transmitting control signals of the isolated type power circuit. The method for transmitting control signals of the isolated type power circuit comprises the following steps that first ground wire noise components are obtained according to ground wire noise signals, the first ground wire noise components and the ground wire noise signals are in a predetermined ratio, first peak signals containing second ground wire noise components are generated according to first control signals of the isolated type power circuit, the first control signals contain the ground wire noise signals, the second ground wire noise components and the ground wire noise signals are in a predetermined ratio, second control signals are obtained according to the first peak signals and the first ground wire noise components, and the isolated type power circuit is controlled to be switched on and switched off according to the second control signals. By means of the technical scheme, the control signals used for controlling the isolated type power circuit are effectively transmitted, and the control accuracy of the isolated type power circuit is improved.

The invention discloses an integrated chip crack detection device and method. The device comprises: a control unit connected to each other, an induction unit, and an excitation unit. Under the instruction of the control unit, the excitation unit generates a linear laser beam, and the linear laser beam To the surface of the semiconductor chip, scan horizontally and vertically on the surface of the semiconductor chip, and at the same time, the linear laser beam generates a thermal wave at the desired excitation line, and the thermal response of the thermal wave is captured by the sensing unit, and the thermal response data is then transmitted to the control unit. The invention realizes non-contact, non-damage and non-intrusion detection and identification of cracks on the surface of the integrated chip; it is not limited by the chip material, has high detection efficiency, and is suitable for online detection; and improves the ability of crack detection and the reliability and safety of the integrated chip sex.

The invention discloses an integrating circuit, and the integrating circuit comprises a first integrating module and a second integrating module. At a first mode, the first integrating module carried out the first integrating of an input current. At a second module, the second integrating module carries out the second integrating of the input current, and reduces the results of the first integrating. The invention also discloses an approaching detection chip, and the chip comprises a light-emitting diode, a photodiode, the integrating circuit, an analog-digital converter, and a control circuit. The chip can effectively eliminate the interference from ambient light, improves the detection precision, not only is suitable for a condition of short distance, but also is suitable for a condition of long distance.

Systems and methods for cancellation of interferences from interference signals are provided. In one embodiment, the system includes a cancellation circuit, and the cancellation circuit is configuredto receive, from a first antenna, a first signal comprising an interference component from the interference signals and a desired component from desired signals; to receive a second signal comprisingan interference component from the interference signals and received with an antenna or frequency different from that of the first signal. The interference component in the second signal is stronger than that the interference component in the first signal. The cancellation circuit is also configured to derive a cancellation signal according to the second signal; subtract the cancellation signal from the first signal to substantially remove the interference component from the first signal to generate an output signal; and output the output signal.

A cardiopulmonary coupling analysis method based on single lead ECG includes the steps of extracting an RR inter-phase sequence and an EDR signal from body surface single-lead ECG signals, eliminating the noise components of the EDR signal according to the relevance between the RR inter-phase sequence and the EDR signal by means of a self-adaptive filter with the RR inter-phase sequence as the reference input signal of the self-adaptive filter and the EDR signal as the ideal signal of the self-adaptive filter to obtain an enhanced type EDR signal, conducting experience pattern decomposing on the RR inter-phase sequence and the enhanced type EDR signal to obtain a plurality of intrinsic mode functions of the RR inter-phase sequence and a plurality of intrinsic mode functions of the enhanced type EDR signal, and selecting the intrinsic mode function, corresponding to a preset frequency band, of the RR inter-phase sequence and the intrinsic mode function, corresponding to the preset frequency band, of the enhanced type EDR signal for cardiopulmonary coupling analysis to obtain a coupling result.

To provide an optical transmission system which cancels out noise components and whose construction cost is lower than that of the conventional system, the present invention is an optical transmission system for transmitting an optical signal from an optical transmitter to an optical receiver and outputting an output electrical signal after a noise canceling process is performed. The optical receiver and transmitter are connected by one optical fiber, through which an optical signal is transmitted before being intensity-modulated. The optical receiver includes; a first processing unit receiving an optical signal, intensity-modulating the received optical signal, and splitting the intensity-modulated optical signal into two optical signals whose respective intensity-modulated components are in antiphase; first and second optical transmission fibers transmitting the two optical signals respectively; and a second processing unit converting the two optical signals into electrical signals respectively, and generating an output electrical signal by performing differential amplification.

In the present invention, by providing an apparatus for displaying a complex modulated holograph and including a light source configured to output light, a display configured to display the hologram by diffracting the output light through a plurality of pixels, and a processor configured to control the display to obtain complex hologram data corresponding to the hologram, and modulate the output light based on the complex hologram data and device information of the plurality of pixels, it is possible to modulate amplitude information and phase information of the light source into required values and display a complex hologram, and to remove a noise component of the hologram.