45 results about "Distortion reduction" patented technology

Presented herein are techniques for reducing distortions in noise cancellation systems, including but not limited to body noise cancellation filtering systems. In one aspect, a method is provided. The method comprises: receiving at least one input signal at a noise cancellation system; and processing the at least one input signal using the noise cancellation system to generate a noise cancellation output signal, wherein the noise cancellation system is controlled by a variable filtering strength parameter that is a function of a level of the at least one input signal.

An external chip driving system includes a decision circuit, multiple first adjustable enhancement circuits, multiple second adjustable enhancement circuits, a pull-up circuit, and a pull-down circuit. The decision circuit outputs first and second decision signals based on a frequency signal and an input signal. In response to the first and second decision signals and one of the first selection signals, each of the first adjustable enhancement circuits generates a first control signal. In response to the first and second decision signals and one of the second selection signals, each of the second adjustable enhancement circuits generates a second control signal. Because the signal amplitude attenuates and becomes distorted during high-speed data transmission, in this disclosure, the first driver in the pull-up circuit is activated in response to the corresponding first control signal, and the second driver in the pull-down circuit is activated in response to the corresponding second control signal, thereby increasing the slew rate of the output signal and reducing the distortion of the output data.

Described herein are switches with asymmetrical anti-series varactor pairs to improve switching performance. The disclosed switches can include asymmetrical varactor pairs to reduce distortions. The asymmetry in the varactor pairs can be associated with geometry of each varactor in the pair. The disclosed switches can stack both symmetrical and asymmetrical varactor pairs. The disclosed switches with asymmetrical anti-series varactor pairs can be configured to improve both H2 and H3 simultaneously.

Embodiments include an optical system that may be included in a waveguide display. A waveguide apparatus according to some embodiments includes an in-coupler grating having a first grating vector G1 substantially perpendicular to a first axis, x; a first eye pupil expander grating having a second grating vector G2 and a first angle ΦG with respect to the first axis; a second eye pupil expander grating having a third grating vector G3 and an angle substantially equal to 90°+ΦG with respect to the first axis; and an out-coupler grating having a fourth grating vector G4 substantially perpendicular to the first axis. Example embodiments describe relationships among the grating vectors, the angle ΦG, and associated parameters to achieve a satisfactory field of view while reducing distortion.

The invention provides a piezoelectric MEMS (Micro Electro Mechanical System) loudspeaker and a preparation method thereof. The piezoelectric type MEMS loudspeaker comprises a substrate supporting layer, a piezoelectric layer and a piezoelectric layer, the multi-cantilever piezoelectric diaphragm array is arranged above the substrate supporting layer, and one side of the edge of the multi-cantilever piezoelectric diaphragm array is fixedly connected with the substrate supporting layer; and the plurality of reinforcing ribs are arranged below the multi-cantilever piezoelectric diaphragm array, are formed by etching SOI wafer substrate silicon and an SOI wafer buried oxide layer, and form an integrated structure with the multi-cantilever piezoelectric diaphragm array to improve the sound pressure level frequency response characteristic of the multi-cantilever diaphragm piezoelectric MEMS loudspeaker. Compared with a piezoelectric MEMS loudspeaker without a reinforcing rib design, the reinforcing rib design suppresses the partial distortion mode of the multi-cantilever piezoelectric diaphragm array, and adjusts the resonance working frequency points of the cantilever piezoelectric diaphragms, so that under the condition of high sound pressure level output, the resonance peak of a high frequency band in a sound pressure level frequency response curve can be obviously reduced, and the sound pressure level output efficiency is improved. The flattening of the medium-high frequency band sound pressure level frequency response curve is realized, so that the effects of reducing distortion and improving sound quality are achieved.

A system and method for distortion reduction. In some embodiments, a system for distortion reduction includes a transmitter comprising pulse amplitude modulation driver circuitry. The pulse amplitude modulation driver circuitry may include a main driver comprising a most significant bit (MSB) amplifier and a least significant bit (LSB) amplifier. The LSB amplifiers may include an upper arm and a lower arm, the strength of which is adjustable.

The utility model discloses a loudspeaker with a novel magnetic circuit design, which comprises a loudspeaker body, the loudspeaker body is arranged in an up-and-down penetrating manner, the upper surface of the loudspeaker body is provided with a vibrating diaphragm, and the middle part of the upper surface of the vibrating diaphragm is provided with a dome; a plurality of voice coils are arranged on the lower surface of the vibrating diaphragm in parallel, the voice coils are symmetrically distributed with the symmetric plane of the vibrating diaphragm as the center and are arranged at equal intervals, the central axes of the voice coils are horizontally arranged, and a plurality of magnets are arranged on the lower portion of an inner cavity of the loudspeaker body. The magnets are distributed among the plurality of voice coils and on one side of the edge voice coil, and the horizontally arranged central axis of the voice coil is favorable for optimizing the linearity of the loudspeaker, so that the change of a BL value in the whole voice coil displacement range is smoother, and nonlinear distortion is reduced; the magnets are distributed between the voice coils and on one side of the edge voice coil, so that the design of a magnetic field can be optimized, the uniformity of the magnetic field can be improved, the smoothness of a BL value can be improved, distortion can be reduced, and dynamic response can be optimized.

The present application relates to a mobile body control device and control method, storage medium, and vehicle that appropriately recognize the outside of a mobile body according to a movement scene. A mobile body control device having one or more imaging devices includes: an image acquisition unit that acquires images of the outside of the mobile body from the one or more imaging devices; a correction unit that performs distortion reduction processing for reducing distortion of the images for one or more regions included in the images acquired from the one or more imaging devices; and a recognition unit that recognizes the outside of the mobile body based on the images after the distortion reduction processing, the correction unit determining the one or more regions that are the targets of the distortion reduction processing in accordance with a predetermined rule corresponding to the movement scene of the mobile body.

The embodiment of the invention provides a signal processing system and electronic equipment. The system comprises an input signal module, a displacement model, a filter coefficient generation module, a group delay compensation module, an adjustable equalizer, an amplifier and an audio converter. The input signal module is respectively connected with the group delay compensation module and the displacement model, the displacement model is connected with the filter coefficient generation module, the group delay compensation module is connected with the adjustable equalizer, the adjustable equalizer is connected with the amplifier, the amplifier is connected with the audio converter, and the filter coefficient generation module is connected with the adjustable equalizer. According to the technical scheme provided by the embodiment of the invention, the frequency response change related to the displacement of the driver can be corrected in a very wide frequency range, so that distortion, particularly intermodulation distortion, is reduced.

The application relates to a method for generating distortion reduced images of a wafer having a periodic semiconductor structure. A reference image of the wafer showing a reference region of the wafer with at least one reference feature representing a part of the periodic semiconductor structure is determined and a plurality of additional images of the wafer are determined, each of the additional images showing the reference region with the at least one reference feature and a milled region obtained by milling a top surface of the wafer, wherein the plurality of additional images differ from one another by a depth of the milled region. A first position of the at least one reference feature is calculated in the reference image, and for each of the additional images, a second position of the at least one reference feature in the additional images is calculated. A transform is determined with which the second positions are matched to the first position and the transform is applied to the additional images in order to obtain the distortion reduced images in the milled region.

Broadly speaking, embodiments of the present techniques generally relate to a method and user device for generating modified audio signals using a machine learning, ML, model. In particular, the present application relates to a computer-implemented method for training a ML model to generate modified audio signals for hearing-impaired persons and / or for distortion reduction or removal, and a user device for generating modified audio signals using a trained ML model. Advantageously, the present techniques provide an effective way of training a ML model to aid in the treatment of hearing impairments.

The present invention discloses an in-ear earphone with a caisson structure, comprising: a front cavity shell, comprising a front cavity and a sound outlet connected to the front cavity, wherein the sound outlet is sleeved with an earmuff; a rear cavity shell, comprising a rear cavity connected to the front cavity, wherein a caisson structure part is arranged in the rear cavity, wherein the caisson structure part comprises an upper caisson structure, a middle caisson structure and a lower caisson structure connected in sequence, wherein the middle caisson structure is located outside the upper caisson structure, and its diameter is larger than that of the upper caisson structure, and the lower caisson structure is located outside the middle caisson structure, and its diameter is larger than that of the middle caisson structure; a sound-emitting unit is arranged in the front cavity and the rear cavity; by arranging the caisson structure part in the rear cavity, a cavity is formed between the caisson structure part and the sound-emitting unit, thereby preventing the sound from diffusing upward, and scientifically applying the principle of acoustic inverted holes to play a role in gathering sound, and at the same time, in order to enhance the low-frequency response and improve the sound quality, the inverted holes reduce the back wave reflection of the bass unit, thereby making the bass cleaner and reducing distortion.

In embodiments of the invention, the present invention is directed to a contact hearing system including: a transmit circuit including a transmit coil positioned in an ear tip, THE transmit circuit having a first bandpass characteristic, wherein the transmit circuit is tuned such that a center of the first bandpass characteristic is set at a first frequency; and a receive circuit including a receive coil positioned on a contact hearing device, the receive circuit having a second bandpass characteristic, wherein the receive circuit is tuned such that a center of the second bandpass characteristic differs from the center of the first bandpass characteristic.

Telecommunications network hardware unit comprising a processor connected to a computer-readable memory unit, the memory unit containing instructions which, when executed by the processor, implement a method for dynamically filtering telecommunications network agents, the method comprising: Retrieval, by the processor executing software code with respect to a virtual network function (VNF) and a physical network function (PNF) of the telecommunications network hardware unit, of peripheral data associated with a user device (UE) that is enabled with respect to a telecommunications network associated with the telecommunications network hardware unit; Assigning peripheral data to a predefined filter selection model by the processor; Selecting, by the processor executing the predefined filter selection model, and in response to the results of mapping, a filtering agent model from a pool of model resources; Selecting, by the processor in response to the execution of the filtering agent model, filtering agents from the VNF and in connection with noise and distortion reduction, which is related to the UE in relation to the telecommunications network; Retrieval, by the processor using a plurality of sensors of a global positioning system (GPS sensors), of environmental properties related to the telecommunications network; Identify, by the processor based on the environmental characteristics, a specified location of the UE that is enabled in relation to the telecommunications network; Sending the filtering agents to the UE via push, through the processor, with the filtering agents being stored within a temporary memory area of ​​an operating system of the UE; Generating, by the processor, network instructions related to the execution of the filtering agents; Execution, by the processor in response to the activation of the network instructions, of the filtering agents with respect to the UE, wherein the execution activates the filtering agents with respect to the UE for a specified time frame; and Reduce, by the processor in response to the results of execution, noise and distortion that occur during the operation of the UE in relation to the telecommunications network.

According to the omnidirectional circularly polarized antenna, the oscillator arms are of a spiral structure, so that under the condition that the heights of the antennas are the same, compared with linear oscillator arms, the oscillator arms are longer in current path and have good standing-wave ratio characteristics and gain characteristics; due to the fact that the multiple oscillator arms on the same layer are arranged in the circumferential array mode, and the spiral directions of the oscillator arms on different layers are opposite, the omnidirectional circularly-polarized antenna has the excellent omnidirectional performance and the stable radiation characteristic. Due to the arrangement of the short-circuit sleeve, the influence of induction current on the feed cable on an antenna radiation pattern can be effectively reduced, the original pattern can be preserved to the greatest extent, and the antenna has higher gain and more stable radiation performance; in general, the omni-directional circularly polarized antenna is not easily influenced by cable induction current, and shape preservation and distortion reduction can be performed on a directional diagram to the greatest extent while the characteristics of high gain and high axial ratio are maintained, so that the communication quality is improved.

A system is provided that may include plural converters that are connected to a common bus. Each of the converters may be configured to convert an alternating current (AC) through the common bus to a direct current (DC) by alternating switches of each of the plural converters between open and closed states in a switching cycle. The system may also include a controller circuit that may be configured to adjust the AC conducted onto the common bus to the plural converters so that a root mean square of a ripple current component of the AC meets one or more designated criteria.

A double-layer rubber edge passive vibration plate comprises an upper rubber edge which is made of an elastic soft rubber material and is formed on a balancing weight in a vulcanization mode; the balancing weight is embedded into the upper rubber edge; the lower rubber edge is fixed with the upper rubber edge and the balancing weight through an adhesive; the passive plate is novel in structure and ingenious in conception, and the double-layer rubber edge design optimizes the vibration characteristics of the passive plate, so that the sound quality performance of the sound box is remarkably improved, distortion and abnormal sound are reduced, and purer and more natural sound experience is brought. The application of the vibration balance theory further improves the vibration balance of the passive plate, so that the sound is more accurate and stable.

The present invention relates to a plastering robot feeding detection method and device, comprising: obtaining a real-time original image of the feeding execution end of the plastering robot feeding process; preprocessing the original image, including performing wide-angle distortion reduction, extracting a valid area from the image, and evenly dividing the valid area into multiple unit images along the horizontal direction; for each unit image, obtaining a feeding grade A based on an RGB threshold filter detection and a feeding grade B based on an LSTM network classification model detection; the feeding grade represents the proportion of the cement area in the entire image; calculating the error E = |A-B| between the two feeding grades A and B, comparing the error E with a set discrimination value, and selecting one of A and B as the feeding grade of the unit image; and summing and averaging the feeding grades of all unit images to obtain a final feeding grade. The present invention enables the plastering robot to accurately and quickly identify the feeding situation.

A system (11) includes (a) an actuator (23, 25, 27), which is configured to tilt a roller (99, 77, 76) while an intermediate transfer member (ITM) (44) of a printing system (11) is moved thereon; and a controller (54, 20), which is configured to: (i) identify a distortion of the ITM (44), and 5 (ii) control the actuator (23, 25, 27) to tilt the roller (99, 77, 76) to reduce the distortion while the ITM (44) is being moved.

An apparatus may be configured to receive a signal to be transmitted via an array of antennas by a zero-forcing precoder, wherein the signal is processed by the linear precoder based on one or more input power criteria for power amplifiers of the array of antennas; apply a distortion reducing matrix to the processed signal, wherein the distortion reducing matrix is trained to reduce the distortion at each output of the power amplifiers based on minimizing an error signal corresponding to a difference between measured and calculated outputs of the power amplifiers after a coupling effect between the power amplifiers based on the applied matrices; and provide an output of the distortion reducing matrix to be used in digital pre-distortion processing of an input signal for the power amplifiers.

A method of signal compensation in wireless communications is described. The method includes receiving a signal that has been distorted by a transmitter. This signal includes in-band (IB) components that include both data and distortion, and out-of-band (OOB) components that are indicative of distortion. The method includes decomposing the received signal to distinguish between the IB and OOB components. It then uses the content within the OOB components to reduce the distortion and produce a compensated signal. An apparatus and one or more non-transitory computer-readable storage devices configured to perform this method are also disclosed. With the embodiments described herein, improved signal fidelity is achieved, allowing for improved receiver performance without the need for additional reference signals or complex transmitter-side compensation mechanisms.

The embodiment of the utility model discloses a long-focus lens with a large target surface and a large aperture. The telephoto lens sequentially comprises a first lens with positive focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with positive focal power from an object side to an image side along an optical axis, the seventh lens has positive focal power; the eighth lens has negative focal power; the first lens and the sixth lens are glass aspheric lenses, and the other lenses are plastic aspheric lenses. According to the utility model, through focal power distribution of the eight lenses, aberration distribution can be balanced, luminous flux can be controlled, an imaging surface can be adjusted, and large-aperture and large-target-surface imaging performance can be realized. In addition, aberration correction, distortion reduction, illumination increase, reduction of the number of optical system lenses and reduction of manufacturing cost can be better achieved through the aspheric plastic lens. The glass lens is utilized to eliminate chromatic aberration, and clear imaging is realized in high and low temperature environments.

A method including receiving a first signal indicative of a first electrical current measured on a first motion assembly (77) for moving a flexible substrate (44) that receives droplets of a printing fluid from an image forming station (60) to form an image thereon. A second signal indicative of a second electrical current measured on a second motion assembly (99) for moving the flexible substrate (44), is received, wherein a section of the flexible substrate (44) is moving between the first motion assembly (77) and the second motion assembly (99). A parameter, which is indicative of a distortion in the image, is calculated based on the first signal and the second signal. In response to detecting, based on the parameter, an increase in the distortion, a corrective action is applied to reduce the distortion.

The application discloses a progressive hyperspectral image compression method based on a context model, comprising the following steps: converting a public data set of a hyperspectral image into a latent tensor through an encoder; processing the latent tensor through a hyper-encoder and a slice module respectively to obtain a hyper-latent tensor and a slice tensor; obtaining an entropy parameter mean M and a standard deviation ∑ of the hyper-latent tensor through a hyper-decoder; calculating a probability tensor P of each slice l , the M and the ∑, and the P l of the reconstructed approximate tensor of the coded slice, M and ∑, and P l as three context information, obtaining an updated probability tensor through a context feature fusion model, using the updated probability tensor to perform entropy encoding, entropy decoding and slice recombination on the slice tensor, inputting the slice tensor after the slice recombination into a distortion reduction module to obtain a more refined latent tensor, and then outputting a result through a decoder and reconstructing a hyperspectral image, so that the application improves the problems of high bit information and poor reconstructed image in the compression of the hyperspectral image.

A semiconductor device and a method for manufacturing the same. A substrate is provided. At least one silicon layer is formed on the top of the substrate. At least one silicon-germanium layer is formed on top of the at least one silicon layer. The at least one silicon-germanium layer contains at least one n-type dopant. A semiconductor device having at least one silicon layer and at least one silicon-germanium layer is formed.

An inductive position sensor can include a first target coil, included in a target, and including a first outer lobe that has a size based on a first shift ratio of a harmonic period of a receiver coil, and a first inner lobe having a size based on a second shift ratio of the harmonic period where the harmonic period corresponds with a harmonic and the first shift ratio is different from the second shift ratio. The inductive position sensor also include a second target coil including a second outer lobe having a size based on the second shift ratio, and a second inner lobe having a size based on the first shift ratio.

In some aspects, an apparatus for wireless communication includes a receiver and a transmitter. The transmitter is configured to transmit a capability message that includes an indication of whether the receiver supports frequency-dependent residual side band (FDRSB) distortion reduction for received signals. The receiver is configured to receive a signal that is precoded, in accordance with at least the indication of whether the receiver supports the FDRSB distortion reduction, with one of a first precoder or a second precoder that is different than the first precoder.

The invention discloses a folding ring, a sound production monomer and electronic equipment, and relates to the technical field of electro-acoustic conversion. The corrugated ring comprises at least two stages of corrugations which are sequentially nested, the at least two stages of corrugations are sequentially first-stage corrugations and second-stage corrugations, the first-stage corrugations alternately form at least one first-stage wave crest and at least one first-stage wave trough from inside to outside, the first-stage wave crest and the first-stage wave trough are both first-stage wave-shaped units, and the second-stage wave crest and the second-stage wave trough are both second-stage wave-shaped units. At least one second-stage wave crest and at least one second-stage wave trough are alternately formed on the first-stage wave-shaped unit from inside to outside, and the second-stage wave crest and the second-stage wave trough are both second-stage ripples, so that the folding ring forms a multi-type wave-shaped structure, and each wave-shaped bending surface of the folding ring forms a diffuse reflection surface. The folding ring is of a multi-type wave-shaped structure formed by at least two stages of corrugations which are sequentially nested, the sound field at the medium-frequency valley can be improved, the medium-high frequency response is relatively flatter, distortion is reduced, the sound effect is improved, and then the acoustic performance is improved.

A system may include a controller couplable to an imaging sub-system utilizing multiple particle beams, where the imaging sub-system includes one or more control elements to manipulate the two or more particle beams that are adjustable with two or more control parameters. The controller may select values of the two or more control parameters by iteratively performing steps until one or more termination conditions are met. For example, the controller may receive measurements of changes of distortions of the particle beams resulting from individual adjustments of the control parameters. The controller may further calculate values of the control parameters that reduce the distortions of the particle beams based on the changes of the distortions resulting from the individual adjustments. The controller may further direct the adjustment of the values of the control parameters to the calculated values.

Methods, systems, and apparatus for wireless communication are described. A user equipment (UE) can be configured to select a beam set to generate energy in a first coverage area (e.g., an out-of-coverage (OOC) area) to reduce the effects of distorted electric fields. The UE can select the beam set based on a gain parameter associated with an antenna set at the UE, wherein the gain parameter is determined for communication in a second coverage area (e.g., an in-coverage (INC) area). In some examples, the UE can use iterative techniques to select the beam. In some examples, the UE can select the beam set based on calculations using a codebook beam set associated with the second coverage area. In some examples, the UE can additionally select the beam set for communication in the second coverage area.