128results about "Gain control" patented technology

A computer system for manipulating, combining, or composing dynamic sounds accesses a package of one or more music stems. The computer system then receive an input variable from one or more vehicle sensors. The one or more vehicle sensors measure an aspect of driving parameters of a vehicle. In response to the input variable, the computer system generate a particular audio effect with the one or more music stems.

Systems and techniques are provided for power amplifier gain error compensation for a Digital Power Amplifier (DPA). In some aspects, a compensation method includes obtaining in-phase (I) and quadrature-phase (Q) components of a baseband sample corresponding to in-phase input amplitude codes and quadrature-phase input amplitude codes. The in-phase input amplitude codes can be distorted based on first gain pre-compensation information corresponding to an in-phase signal branch of the DPA, to generate pre-distorted output amplitude codes of the I component. The quadrature-phase input amplitude codes can be distorted based on second gain pre-compensation information corresponding to a quadrature-phase signal branch of the DPA, to generate pre-distorted output amplitude codes of the Q component. The DPA can be driven using the pre-distorted output amplitude codes of the I and Q components to generate a Radio Frequency (RF) output.

An RF power detector controls an amplitude of a replica input signal so that a power of the replica input signal substantially equals a power of an input signal to the RF power detector. A signal generator generates the replica input signal responsive to a digital control word. A feedback circuit adjusts the digital control word responsive to a comparison of output signals from an analog power sensor.

This invention belongs to the field of integrated circuit technology and discloses a dual-transformer load-gain-flat tunable low-noise amplifier, including an input matching circuit, a two-stage common-source current-multiplexed amplifier circuit, and an output matching circuit. It also includes a first transformer topology circuit, a second transformer topology circuit, a first adjustable bias voltage source, and a second adjustable bias voltage source. The two-stage common-source current-multiplexed amplifier circuit includes a first-stage common-source amplifier circuit and a second-stage common-source amplifier circuit. The first transformer topology circuit serves as the load for the first-stage common-source amplifier circuit; the second transformer topology circuit serves as the load for the second-stage common-source amplifier circuit. The low-noise amplifier of this invention features high gain, high linearity, and high gain flatness, while achieving a wide tuning range of gain adjustment. Furthermore, it achieves good gain flatness and good input-output matching at different gain adjustment levels.

The application discloses a noise control automatic gain control system, comprising: a unit gain second-order active low-pass filter module for filtering an input signal to suppress out-of-band noise; an automatic gain control module connected to the unit gain second-order active low-pass filter module, comprising a variable gain amplifier and a negative feedback loop, the negative feedback loop controls a gain control voltage through charging and discharging of a capacitor, and is used for realizing adaptive gain adjustment; and a temperature compensation module connected to the automatic gain control module, used for generating a positive temperature coefficient voltage through a resistor to compensate for output signal amplitude variation caused by temperature. The application also discloses a noise control automatic gain control method. The technical scheme provided by the application realizes triple technical effects of noise suppression, adaptive gain control and temperature stability enhancement, and improves the comprehensive performance of the automatic gain control system as a whole.

Certain aspects of the present disclosure provide techniques for multi-connectivity automatic gain control. An example method of wireless communications includes receiving, via a receive path, signaling comprising a first signal and a second signal, wherein the receive path comprises one or more components. The method further includes adjusting a set of gains applied to the one or more components based at least in part on one or more first metrics associated with the first signal and one or more second metrics associated with the second signal.

The present application relates to a method and apparatus for processing human biological signal data, a device, and a storage medium. The method includes: traversing an original human biological signal with a plurality of preset peak-to-peak value adjustment time windows; acquiring an original peak-to-peak value of the original human biological signal within a previous peak-to-peak value adjustment time window; determining a target adjustment multiple of the current peak-to-peak value adjustment time window based on the original peak-to-peak value and a preset target peak-to-peak value; and determining a plurality of actual adjustment multiples of the current peak-to-peak value adjustment time window based on the target adjustment multiple, and sequentially adjusting signal values of the original human biological signal at a plurality of sampling points within the current peak-to-peak value adjustment time window based on the plurality of actual adjustment multiples, so that a peak-to-peak value of the original human biological signal within the current peak-to-peak value adjustment time window gradually approaches the target peak-to-peak value. The present application can optimize human biological signal data and improve the accuracy of signal indicators and parameters.

This invention is related to signal processing of music. The invention specifically concerns removal of unwanted artifacts from a music signal. The invention provides a method for attenuating resonances in a sound signal, which method uses subsampling of at least one sub-band of the original signal to save computing resources. As a coarse overview description, the method comprises at least steps in which an incoming signal block is filtered (120) into at least two different frequency sub-band signals, at least one of the sub-band signals is subsampled (121), a resonance analysis step is performed (125) for each sub-band signal, said step resulting in a filter response, a sub-band signal from each sub-band is convolved (130) with the corresponding filter response to produce a filtered sub-band signal, for each subsampled sub-band, the filtered sub-band signal is upsampled (140), and finally the upsampled sub-band signals of subsampled sub-bands and filtered sub-band signals of any non-subsampled sub-bands are combined (150) to form a result signal block. This method saves computing resources by performing analysis based on subsampled sub-band blocks.

Certain aspects of the present disclosure provide techniques for multi-connectivity automatic gain control. An example method of wireless communications includes receiving, via a receive path, signaling comprising a first signal and a second signal, wherein the receive path comprises one or more components. The method further includes adjusting a set of gains applied to the one or more components based at least in part on one or more first metrics associated with the first signal and one or more second metrics associated with the second signal.

To provide a method and system for dynamic voice enhancement of an audio source.SOLUTION: A method of processing audio source input signals includes: first path signal processing including receiving an audio source input and performing dynamic loudness balancing on the audio source input based on a first gain control parameter; and second path signal processing including performing voice detection on the audio source input and calculating a detection confidence, and calculating a second gain control parameter based on the detection confidence. The first gain control parameter is updated with the second gain control parameter calculated by a second processing path. The first path signal processing and the second path signal processing may be performed synchronously or asynchronously.SELECTED DRAWING: Figure 8

A wireless transmitter and antenna are provided on the transmit side, and a receiver and an antenna are provided on the receive side. A transmitter receives samples from a video source via media signals, permutes the input samples into input vectors, and encodes each input vector with reference to a set of orthogonal codes to produce analog SSVT signals per encoder. The wireless transmitter modulates the SSVT signals generated by the SSVT transmitter onto one or more carrier frequency signals. Once modulated, the carrier frequency signals are then broadcast by the antenna. On the receive side, the antenna receives the broadcast and provides the modulated carrier signals to the wireless receiver. In response, the wireless receiver demodulates the carrier frequency signals and produces the corresponding analog SSVT signals, which are then decoded into reconstructions of the input media samples into output vectors, which are then permuted into output samples that are sent to a video sink for display.

In at least one embodiment, an audio system is provided. The audio system includes one or more microphones and at least one controller. The one or more microphones are positioned about a vehicle to provide a captured audio input signal. The at least one controller is programmed to receive the captured audio input signal and to receive a first signal indicative of a vehicle speed for the vehicle. The at least one controller is further programmed to determine an attenuation amount based on the vehicle speed for the vehicle and to attenuate the captured audio input signal based on the attenuation amount to increase clarity of the captured audio input signal.

The invention relates to a method for operating a device system (100) comprising at least one household appliance (102) and a mobile terminal (104) coupled to the at least one household appliance (102) in a data-transmitting manner, wherein the method comprises the following steps: reading volume information from the mobile terminal (104), wherein the volume information represents a current volume of media playback by the mobile terminal (104); determining a current operating volume of the at least one household appliance (102) using at least one device information of the household appliance (102), wherein the device information comprises a correlation between a power level and / or an operating mode of the household appliance (102) and a volume value of the household appliance (102);Setting media playback on the mobile device (104) depending on the volume information and the current operating volume by means of a control signal.;

A charging case for a pair of wireless earphones, the charging case comprising: a housing having a peripheral wall that defines a shell and one or more audio openings formed through the peripheral wall; a frame insert coupled to the housing and extending into the shell, the frame insert having one or more insert walls that define first and second pockets sized and shaped to accept first and second wireless earphones, respectively; wherein the one or more insert walls cooperate with the housing peripheral wall to define a interior cavity within the charging case; a lid coupled to the housing and operable between a closed position in which the lid covers the first and second pockets and an open position in which the first and second pockets are exposed; a rechargeable battery disposed within the interior cavity; a speaker disposed within the interior cavity and aligned to emit sound through the one or more openings; and circuitry coupled to the battery and the speaker and configured to: initiate playing an audio asset on the speaker at a first gain level; while continuing to play the audio asset, increasing the gain level of the speaker from the first gain level to a final gain level by repeating a sequence of measuring a system load on the battery and increasing the gain level of the speaker until the measured system load reaches a threshold level; after the measured system load reaches the threshold level, setting the gain level of the speaker at the final gain level and continuing playing the audio asset with the gain set at the final gain level.

An audio processing system includes an audio source device configured to provide an analog based audio signal; an audio converting device including an analog gain amplifier configured to amplify the analog based audio signal into an amplified analog signal, a first analog-to-digital converter (ADC) configured to convert the amplified analog signal into an amplified digital signal, a digital gain reducer configured to reduce the amplified digital signal into a first digital signal, an analog gain reducer configured to reduce the analog based audio signal into a reduced analog signal, a second ADC configured to convert the reduced analog signal into a reduced digital signal, and a digital gain amplifier configured to amplify the reduced digital signal into a second digital signal.

The method (800) includes receiving (850-1) input samples of a signal to be processed by a subsequent device, clipping, and performing a limiting process on at least one of the input samples (850-2), the limiting process including generating an inter-sample prediction value by applying a sub-filter to a corresponding plurality of input samples including the relevant input sample, the sub-filter modeling the inter-sample behavior of the subsequent device, generating an inter-sample prediction value by applying a sub-filter to a corresponding plurality of input samples including the relevant input sample, and replacing the relevant input sample with a reduced sample by applying an offset to the relevant input sample, the reduced sample having the same sign as the relevant input sample but having an amplitude smaller than that of the relevant input sample, and the offset being calculated based on a parameter of the sub-filter and an overshoot difference between a threshold and one of the inter-sample prediction values.

Smart glasses, method and device for automatic volume control, and smart glasses system are provided. The smart glasses include: a glasses body, and a wireless communication module, microphone(s) and speaker(s) provided on the glasses body. The wireless communication module has a processor connected to the microphone(s) and the speaker(s). The microphone(s) transmit a picked up audio signal to the processor. The processor determines whether the audio signal is a noise signal, calculates a noise level of the noise signal when the audio signal is the noise signal, and adjusts an output volume of the speaker(s) to an output volume corresponding to the noise level of the noise signal according to a preset corresponding relationship between noise levels and output volumes of the speaker(s). The present application can automatically adjust the output volume according to the noise level, and improve the intelligence of smart glasses and convenience of user action.

The utility model discloses a kind of control circuit of high-power optical fiber amplifier, it is related to optical fiber amplifier technical field, high-power optical fiber amplifier includes the first stage gain unit and second stage gain unit sequentially arranged along the transmission direction of light;Control circuit includes the control module, first gain control ring and second gain control ring connected;When starting optical fiber amplifier, control module controls first gain control ring to start first stage gain unit, and the output light power of first stage gain unit is collected, control module controls second gain control ring to start second stage gain unit when the output light power of first stage gain unit is greater than threshold light power;When closing optical fiber amplifier, control module first controls second gain control ring to close second stage gain unit, then controls first gain control ring to close first stage gain unit.The control circuit can improve the security and reliability of the high-power optical fiber amplifier application.

A signal processing system for adjusting an audio signal, the signal processing system configured to: receive an audio signal for adjustment at a signal input; at a function generator, receive a selection of a musical key and scale, the musical key and scale including musical notes, and generate an audio signal processing function, configured to adjust the amplitude of frequencies of an audio signal, the audio signal processing function being dependent on the selected musical key and scale; apply the generated audio signal processing function to the received audio signal to generate an adjusted audio signal; and, output the adjusted audio signal at a signal output.

The application provides a pulse radiator, relates to the field of microwave radio frequency technology, and comprises a radio frequency multistage amplification link and a measurement and control communication component; the radio frequency multistage amplification link generates an output pulse signal; the measurement and control communication component performs real-time monitoring and regulation on the output pulse signal, and is configured with a self-adaptive degradation fault prevention shutdown control strategy. In a continuous radiation working mode, operating state parameters are continuously acquired; when the operating state parameters reach a preset warning limit, the self-adaptive degradation control is triggered, a dynamic attenuation control code is issued to reduce the output gain to enter a degradation working mode; during the degradation working mode, the parameter development trend is continuously monitored; when the parameters recover to a safe interval, the dynamic attenuation control code is reversely adjusted to smoothly recover the output gain to the initial setting state. The application prevents hard power-off shutdown of the equipment caused by abnormal working conditions, and maintains continuous radiation of the signal.

To provide bidirectional variable gain amplifiers (VGAs) for radio frequency (RF) communication systems.SOLUTION: A bidirectional VGA 120 includes a first amplifier A1 having an input coupled to a transmit / receive port TR, a second amplifier A2 having an output coupled to a transmit port TX, a third amplifier A3 having an input coupled to a receive port RX, a fourth amplifier A4 having an output coupled to the transmit / receive port TR and to the input of the first amplifier A1, and a switch circuit S1, S2 that connects an output of the first amplifier A1 to an input of the second amplifier A2 in a transmit mode, and that connects an output of the third amplifier A3 to an input of the fourth amplifier A4 in a receive mode.SELECTED DRAWING: Figure 4

The application discloses a kind of multi-channel collaborative loading automatic compensation method and system, it includes: obtaining trigger signal in signal channel, and establish shared clock reference and synchronous trigger mechanism;Initial calibration is carried out to each signal channel based on shared clock reference, and its response data is determined;Compensation coefficient is generated for each signal channel based on response data to construct initial compensation lookup table, compensation coefficient of input digital signal in each signal channel is determined according to it, and pre-compensation signal is obtained by compensating digital signal based on compensation coefficient;After pre-compensation signal is loaded, feedback signal is collected and target signal is determined to determine signal error;Adjustment coefficient is determined based on signal error, and the compensation coefficient of each signal channel is adjusted based on it.The application constructs digital domain inverse model to carry out automatic collaborative compensation correction to input signal, and introduces real-time feedback and adaptive algorithm to form closed-loop fine tuning, realizes the effect that component can continuously and stably run.

A circuit includes an amplifier and a feedback network coupled between the input and the output of the amplifier. The feedback network includes a plurality of parallel coupled branches, each branch having a first selection switch coupled to the input, a second selection switch coupled to the output, and an impedance between the first and second selection switches. Each branch includes a plurality of signal feedback paths coupled in parallel, each having a tuning switch coupled between the first selection switch and the second selection switch of that branch. A control unit is coupled to the feedback network and configured to vary a gain of the amplifier by selectively placing the first and second selection switches of each branch in a conductive state or a non-conductive state and selectively activating respective tuning switches of any branch having first and second selection switches in the conductive state.

Embodiments of the present disclosure relate to electronic amplifiers. A variable gain amplifier has a cascode stage formed by a pair of cross-coupled transistors. Each pair of cross-coupled transistors is provided with a transformer that keeps the impedance presented to the cross-coupled transistors constant with gain.

An audio device includes an input circuit configured to receive an audio input signal; an output circuit configured to output an audio output signal; and an isolation circuit including: a resistive opto-isolator including a light source configured to emit an amount of light therefrom in response to a control signal from a user interface, wherein the control signal is indicative of a desired gain for one or more loudspeakers to transmit the audio output signal into a listening environment; and at least one detector including a resistance value and being optically coupled to the light source such that the at least one detector detects the amount of light being emitted from the light source and the resistance value changes based on the detected amount of light for the one or more loudspeakers to transmit the audio output signal at the desired gain.

The application discloses a kind of broadband solid-state power amplifier and pulse modulation method, belong to amplifier technical field, including amplifier unit, detection control unit, power module and power detection module, it solves the technical problem of improving the protection of GaN power device in high-power power amplifier, accurate control amplitude and improve the maintainability of modularity, the local grid negative voltage management of the present application is realized, power-on power-down timing control, drain pulse modulation and temperature monitoring, effectively avoid GaN chip damage due to power timing error or local overheating, significantly improve the reliability of the whole machine, support open-loop gain control and closed-loop automatic level control ALC two modes, effectively reduce the impact of pulse current on power bus, improve the flatness of output pulse top, ensure the consistency of each unit radio frequency phase and power supply timing, improve the synthesis efficiency, can be quickly positioned and replaced, greatly reduce the average repair time, improve the availability and usability of equipment.

A low noise amplifier circuit (40), a receiver (110), and a wireless device (100) are provided, and relate to the field of radio frequency integrated circuit technologies. The low noise amplifier circuit (40) includes: An input of a first-stage amplifier circuit (41) receives an operating signal, an output of the first-stage amplifier circuit is separately connected to an input of a second-stage amplifier circuit (42) and a first end of a notch circuit (43), and an output of the second-stage amplifier circuit (42) is connected to a second end of the notch circuit (43). The operating signal includes a radio frequency signal with a first frequency and an interference signal with a second frequency, the first frequency is in a preset operating frequency band, and the second frequency is in an operating frequency band other than the preset operating frequency band. An equivalent impedance value of the notch circuit (43) in the preset operating frequency band is a first impedance value, an equivalent impedance value of the notch circuit (43) in the operating frequency band other than the preset operating frequency band is a second impedance value, the first impedance value is greater than a first threshold, and the second impedance value is less than the first threshold. In this way, the low noise amplifier circuit (40) has low power consumption, a high gain, and a strong anti-interference capability.

Method of stitching audio segments, comprising: flushing the buffers of first (101,Fig.1A) and second (103,Fig.1A) computing device 402; obtaining a first audio frame and metadata from a first computi