80 results about "Signal fidelity" patented technology

An intravascular ultrasound probe is disclosed, incorporating features for utilizing an advanced transducer technology on a rotating transducer shaft. In particular, the probe accommodates the transmission of the multitude of signals across the boundary between the rotary and stationary components of the probe required to support an advanced transducer technology. These advanced transducer technologies offer the potential for increased bandwidth, improved beam profiles, better signal to noise ratio, reduced manufacturing costs, advanced tissue characterization algorithms, and other desirable features. Furthermore, the inclusion of electronic components on the spinning side of the probe can be highly advantageous in terms of preserving maximum signal to noise ratio and signal fidelity, along with other performance benefits.

A Signal Conditioning Filter (SCF) and a Signal Integrity Unit (SIU) address the coupled problem of equalization and noise filtering in order to improve signal fidelity for decoding. Specifically, a received signal can be filtered in a manner to optimize the signal fidelity even in the presence of both significant (large magnitudes of) ISI and noise. The present invention can provide an adaptive method that continuously monitors a signal fidelity measure. Monitoring the fidelity of a multilevel signal can be performed by external means such as by the SIU. A received signal y(t) can be “conditioned” by application of a filter with an electronically adjustable impulse response g(t). A resulting output z(t) can then be interrogated to characterize the quality of the conditioned signal. This fidelity measure q(t) can be used to adjust the filter response to maximize the fidelity measure of the conditioned signal.

A method and apparatus for motion blur and ghosting prevention in imaging system is presented. A residue image is computed by performing spatial-temporal filter with a set of absolute image difference of image pairs from input images. A noise adaptive pixel threshold is computed for every pixel based on noise statistics of image sensor. The residue image and the noise adaptive pixel threshold are used to create a motion masking map. The motion masking map is used to represent motion and non-motion pixels in pixels merging. The pixels merging step is performed to generate an output image by considering the motion pixels where the motion pixels are performed separately. The resulting output image having no or less motion blur and ghosting artifacts can be obtained, even the input images having different degree of motion blur between each of the image, while the complexity is low. It is preferred that the current invention is applied in the Bayer raw domain. The benefit is reduced computation and memory because only 1 color component is processed for each pixel. Another benefit is higher signal fidelity because processing in the Bayer raw domain is unaffected by demosaicing artifacts, especially along edges. However, the current invention can also be applied in RGB domain.

A doped contact region having an opposite conductivity type as a bottom semiconductor layer is provided underneath a buried insulator layer in a bottom semiconductor layer. At least one conductive via structure extends from an interconnect-level metal line through a middle-of-line (MOL) dielectric layer, a shallow trench isolation structure in a top semiconductor layer, and a buried insulator layer and to the doped contact region. The doped contact region is biased at a voltage that is at or close to a peak voltage in the RF switch that removes minority charge carriers within the induced charge layer. The minority charge carriers are drained through the doped contact region and the at least one conductive via structure. Rapid discharge of mobile electrical charges in the induce charge layer reduces harmonic generation and signal distortion in the RF switch. A design structure for the semiconductor structure is also provided.

Dynamic steered spatial compounding is provided in ultrasound imaging. The compounding adjusts for variance. The compounding dynamically reacts to variance due to motion and/or view direction. For each location, the weights are set based on the motion or signal variance for the respective location. The weighting used for compounding or the results of the compounding adapt to maintain or increase signal fidelity.

The invention relates to the field of mobile communications, in particular to a signal compression method and apparatus. In order to solve the problems of high processing delay and high compression loss in the existing signal compression methods, the method comprises, based on the respective preamble symbol bits of the first i signal and the first q signal included in the initial iq signal, determining the overall displacement length, and based on the overall shift length, performing shift processing on the first I signal and the first Q signal, obtaining a second I signal and a second Q signal, and according to the preset bit width, a second I signal and a second Q signal are truncated, the third I signal and the third Q signal are obtained, and the target IQ signal is generated based onthe third I signal and the third Q signal. Thus, no additional AGC processing is required, and the time delay is greatly reduced. Moreover, since part of the IQ signal is completely reserved, the signal fidelity is high, and the compression loss is greatly reduced.

An insulator for an electrical connector that comprises a back shell, metal shell, EMI band, and the insulator. The insulator features alternating contact cavities and air dielectric cavities. The air dielectric cavities reduce the effective dielectric constant of the connector, which allows high-speed data to be transmitted while maintaining impedance, thereby preserving signal fidelity.

The invention discloses a low-pass filtering based engine fuel consumption detection system, mainly comprising a single-chip microcomputer (1), a power platform to be detected, an engine to be detected, a measuring and controlling instrument (4), a power analyzer (2), an accelerator driver (5), a motor controller (3), a fuel signal acquisition system (6), and a low-pass filtering system (7). The engine is disposed on the power platform. The measuring and controlling instrument (4) and the power analyzer (2) are connected with the single-chip microcomputer (1). The accelerator driver (5) is connected with the power analyzer (2). The fuel signal acquisition system (6) is connected with the engine. The input end of the low-pass filtering system (7) is connected with the fuel signal acquisition system (6), and the output end thereof is connected with the single-chip microcomputer (1). The system is capable of processing acquired signals, the processed signals are of high fidelity, and thus precision of the system is improved.

The invention discloses a preparation method of a single crystal copper-silver composite conductor. The method comprises the following steps: (1) preparing a single crystal copper wire rod; (2) silvering pretreating the surface of the single crystal copper wire rod; (3) preparing a single crystal copper-silver composite filament; and (4) preparing the single crystal copper-silver composite conductor. The single crystal copper-silver composite conductor prepared by the method comprises a copper matrix and a silvered layer out of the copper matrix, the cross section of the single crystal copper-silver composite conductor is a round or a polygon, the diameter at the maximum part of the cross section is 0.008mm-0.5mm, and the thickness of the silvered layer is 0.1 micron-100 microns. The composite conductor adopting the above technical scheme has the advantages that the scattering, refraction and reflection phenomena of the electron are reduced by using the single crystal copper wire rod as the matrix, the attenuation and the distortion of the signal are effectively prevented, the conducting performance and the signal transmission performance of the conductor are improved, and the conductor has high conductivity and signal fidelity.

High temperature pressure sensing devices and methods are disclosed. In some embodiments, a high temperature pressure sensor including intrinsic zero output and span correction versus temperature is disclosed. In addition, ways to improve high temperature performance through the use of intermediate circuits located towards the distal end of the high temperature pressure sensor as well as configurations to reduce thermally induced stresses within the pressure sensor are disclosed. The disclosed embodiments also detail ways to reduce signal loss due to various stray capacitances within the pressure sensor to improve signal fidelity and sensitivity.

The invention belongs to the technical field of optical equipment manufacturing, and relates to a two-dimensional silicon substrate photonic crystal line-defect slow optical waveguide device. Monosymmetrical circular-segment-shaped scattering elements are sequentially arranged and etched on the surface of a two-dimensional silicon wafer along the direction of the long edge of the two-dimensional silicon wafer, and a row of positions at which no monosymmetrical circular-segment-shaped scattering element is etched is left at a symmetric axis of the two-dimensional silicon wafer so as to form a line defect; the centers of adjacent monosymmetrical circular-segment-shaped scattering elements are arranged in the shape of an equilateral hexagon on the surface of the two-dimensional silicon wafer, and each monosymmetrical circular-segment-shaped scattering element is formed by docking two semicircular segments; the digged monosymmetrical circular-segment-shaped scattering elements respectively and sequentially arranged on the two-dimensional silicon wafer are of a transparent structure; and the direction of the line defect is parallel to the direction of a long axis of the monosymmetrical circular-segment-shaped scattering element. The two-dimensional silicon substrate photonic crystal line-defect slow optical waveguide device is simple in structure, small in size, low in cost, high in stability, high in efficiency, simple and feasible, high in group refractive index, large in slow optical bandwidth and good in signal fidelity, and can be widely applied to the technical field of solar photovoltaic conversion and photonic crystal luminescence.

The invention discloses an image restoration method in combination with a weight factor and gradient restriction. The image restoration method comprises the steps of (1) mathematically deducing and establishing an image restoration model by uniting a Bayes frame and image relevant characteristics, (2) designing a weight factor coefficient matrix, and (3) optimizing and obtaining the optimal restored image. The image restoration method in combination with the weight factor and the gradient restriction is characterized in that the requirements of signal fidelity and detail retention in image restoration are taken into account, an image restoration cost function on the basis of energy minimization is provided from the perspective of Bayes conditional probability according to the ideas of high fidelity and good detail retention, the image restoration model is established, and finally, the optimal solution of image restoration can be obtained by virtue of deduction optimization. According to the image restoration method, an observation blurred noise image is input and a corresponding degenerate function is provided, and then an excellent restoration result can be obtained quickly. The image restoration method in combination with the weight factor and the gradient restriction is applicable to processing, such as deblurring, denoising and the like, images of visible light, infrared and the like, and capable of realizing image restoration quickly.

Provided is a low-residual-voltage ultra wide band coaxial lightning arrester. The problem that an existing coaxial lightning arrester is few in discharging channel, poor in through-current capability, high in residual voltage caused by insufficient discharging, narrow in transmission band and small in application, easily damages a protected device and causes communication signal distortion is mainly solved. The low-residual-voltage ultra wide band coaxial lightning arrester is characterized in that each main coaxial core (5) comprises an interface portion (53) penetrating insulation supports (51) and an equant core body portion (52) arranged between the insulation supports (51), and a plurality of cavities different in diameter are coaxially arranged inside a main coaxial housing (3). The main coaxial cores of the low-residual-voltage ultra wide band coaxial lightning arrester are even, and impedance matching is achieved by adopting a method of changing the diameters of the cavities of the main coaxial housing. The low-residual-voltage ultra wide band coaxial lightning arrester is wide in band width, large in through-current channel number, high in through-current capacity, rich in high-frequency digital signal frequency spectrum, high in signal fidelity, wide in application range, complete in discharging, low in residual voltage and high in protectiveness on an instrument device behind the lightning arrester.

The invention discloses a three-dimensional through silicon via vertical interconnection method based on a multi-layer graphene auxiliary layer, which comprises the steps of manufacturing a silicon via in a silicon substrate; depositing an insulating layer at the surface of the silicon substrate and the inner wall of the silicon via; depositing a barrier layer on the insulating layer; forming a multi-layer graphene auxiliary layer at the surface of the barrier layer; attaching a dry film to the multi-layer graphene auxiliary layer at the surface of the silicon substrate, and then performing exposure and development to form a dry film layer; depositing a seed layer at the bottom surface of the silicon via and the surface of the dry film layer; and filling the silicon via with a conductive material. According to the invention, a via is manufactured in the silicon substrate, then an insulating layer and a barrier layer are successively deposited, a multi-layer graphene auxiliary layer isformed, a dry film is attached, a seed layer is deposited, and then the via is filled with a conductive material, excellent electrical performance of the graphene material is utilized to solve a problem of increase in resistance and power consumption of the TSV (Through Silicon Via) caused by a skin effect, atom migration and the like, the graphene and copper serve as a TSV signal transmission channel, the electrical performance and the reliability of the 3D-TSV structure are improved, and problems such as TSV vertical interconnection and signal fidelity under a new technology node are improved.

The invention discloses a decoded image enhancement method, and mainly solves the problem that the current decoded enhanced image algorithm does not fully consider the visual and transmission requirements of human eyes on different areas of an image and cannot achieve the balance of texture subjective quality and edge signal fidelity. The method is based on different characteristics of a texture region and an edge region. An edge region-based decoding enhancement method and a texture region-based decoding enhancement method are respectively designed to obtain a basic fidelity layer and a texture enhancement layer; and then the basic fidelity layer and the texture enhancement layer are adaptively fused by using a region adaptive fusion technology, so that the balance of texture subjective quality and edge signal fidelity is obtained, a decoded image is enhanced better, and the subjective experience of a user and the fidelity transmission of a signal are improved.

The invention discloses a mechanical microseism source, and a microseism monitoring system and a using method thereof. The microseism source comprises a driving power unit, a pressure storage cavity, a safety valve and an energy emission head; and the microseism source is characterized in that a gas outlet of the pressure storage cavity is connected with the safety valve and the energy emission head successively, the pressure storage cavity is provided with gas inlets, each gas inlet is internally provided with a non-return valve, and the driving power unit controls the magnitude of the pressure in the pressure storage cavity. The microseism monitoring system comprises the microseism source, a signal fidelity box, a microseism signal monitoring device, a control computer and a microseism sensor; and the system is characterized in that an electronic switch of the microseism source is electrically connected with the control computer, one end of the microseism signal monitoring device is electrically connected with the control computer, and the other end of the microseism signal monitoring device is electrically connected with the signal fidelity box and the microseism sensor successively. According to the invention, the structure is simple, operation is convenient, the energy releasing magnitude and direction can be controlled, and networking is allowed; and the microseism source is low in frequency and cost and safe in use, and provides hardware equipment support for microseism monitoring.

The present invention relates to an acoustic design of an earphone horn and particularly relates to a dual impedance earphone. When a voice coil of the earphone horn is made, an enamelled wire of the voice coil wire is designed in a double charge-discharge manner, the outlet direction of a lead of the voice coil forms 180 degrees with the horizontal direction, and the horn is dual impedance. In the earphone, two groups of voice coils are converted into a parallel or serial state through a switch conversion module, at the parallel state, namely the voice coils are low impedance, an audio signal directly drives the horn to sound; and at the serial state, namely the voice coils are high impedance, the audio signal drives the horn to sound after being amplified by an audio power amplification module, at this time, the signal to noise ratio of the audio signal is twice larger than that of at the low impedance, and the signal fidelity is also greatly improved.