18results about "Signal processing for reducing noise" patented technology

The invention relates to the technical field of digital playing equipment, and provides a lossless control method for the volume of a digital player and the digital player. The method comprises the following steps of: after receiving a target volume parameter, executing dynamic multiplying power oversampling and high-order noise shaping on an input digital audio signal, and injecting preset jitter to suppress in-band quantization distortion so as to generate an optimized digital audio stream; meanwhile, a high-resolution digital reference current control instruction corresponding to the target volume is independently generated, output of a reference current source is adjusted according to the high-resolution digital reference current control instruction, and a high-precision differential current signal is obtained by combining nonlinearity, temperature excursion and quantization errors of a closed-loop feedback compensation device through a multi-bit current segmentation network; performing bias stabilization processing on the signal, and converting the signal into a differential voltage signal for suppressing common-mode noise through a precision differential resistance network; and finally, low-distortion differential analog audio signals capable of directly driving a load are output through low-distortion gain, impedance conversion and power driving, so that low-distortion, high-signal-to-noise-ratio and wide-dynamic-range output in a full-volume range is realized.

A storage system including a plurality of HDDs, a cooling system, and a system controller is provided. Each of the plurality of HDDs includes a disk, a write head configured to write data to the disk, a microphone, an HDD controller configured to process a signal from the microphone determine noise detected by the microphone, and a housing that houses the disk, the write head, the microphone, and the HDD controller. The cooling system is configured to cool the plurality of the HDDs. The system controller is configured to receive data corresponding to the determined noise detected by the microphones of each of the plurality of HDD, and control a cooling level of the cooling system based on the received data and acoustic noise information associated with each of the plurality of HDDs. A method for operating the storage system is also provided.

Methods and units for determining median values in a data processing system (e.g. an image processing system) are provided, in which a stream of data values is received. A first median value of the received data values within a first subset of data values of the received stream is determined, and intermediate data used for determining the first median value is stored. The stored intermediate data is used to determine a median value of the received data values within a second subset of data values of the received stream, wherein the second subset at least partially overlaps with the first subset. The determined median values are outputted for use in the data processing system, e.g. for further processing.

Methods and units for determining median values in a data processing system (e.g. an image processing system) are provided, in which a stream of data values is received. A first median value of the received data values within a first subset of data values of the received stream is determined, and intermediate data used for determining the first median value is stored. The stored intermediate data is used to determine a median value of the received data values within a second subset of data values of the received stream, wherein the second subset at least partially overlaps with the first subset. The determined median values are outputted for use in the data processing system, e.g. for further processing.

The invention is suitable for the technical field of earphones, and provides an earphone recording method and device, earphone equipment and a readable storage medium. The earphone recording method comprises the following steps: receiving an audio signal sent by a mobile terminal; detecting the audio signal; when it is detected that the audio signal is call audio and a recording instruction is received, recording the call audio, and performing real-time recording processing in the recording process to obtain a recording file; and storing the recording file. According to the embodiment of the invention, recording can be realized through the earphone equipment, recording software is not needed for recording, and the method is suitable for various types of mobile terminals. In addition, real-time recording processing is carried out in the recording process, and the recording quality can be effectively improved.

A noise cancellation technique is presented with improved frequency resolution. The method includes: acquiring a digitized noise signal from an environment in which the audio signal stream is present; receiving a data sample from the digitized noise signal; appending one or more additional samples to the data sample to form a series of samples, where magnitude for each of the one or more additional samples is substantially zero; computing a frequency domain representation of the series of samples in the frequency domain; shifting the frequency domain representation of the series of samples in time using the digital processor circuit, thereby producing a shifted frequency domain representation of the series of samples; converting the shifted frequency domain representation of the series of samples to time domain to form a portion of an anti-noise signal; and outputting the anti-noise signal into the audio signal stream to abate the noise through destructive interference.

The present invention provides a noise cancellation technique with improved frequency resolution. The method includes: obtaining a digitized noise signal from an environment in which the audio signal stream exists; receiving data samples from the digitized noise signal; appending one or more additional samples to the data samples to form a series of samples, wherein the magnitude of each of the one or more additional samples is substantially zero; calculating a frequency domain representation of the series of samples in the frequency domain; using the digital processor circuit to shift the frequency domain representation of the series of samples in time, thereby generating a shifted frequency domain representation of the series of samples; converting the shifted frequency domain representation of the series of samples to the time domain to form a portion of an anti-noise signal; and outputting the anti-noise signal into the audio signal stream to cancel the noise by destructive interference.

The invention discloses a waveform file generation method and system. The waveform file generation method comprises the following steps: acquiring and processing original signal data through a proper sensor and a data acquisition system; converting the signal data of the time domain into frequency domain data; according to an FFT result, main frequency components are extracted, and difference coding is carried out on the selected main frequency components; the compressed data and necessary metadata are packaged together; storing the compressed data file to a local or cloud server; according to the method, the time domain data is converted into the frequency domain data through the fast Fourier transform, so that the data can be analyzed and compressed more easily, the requirements for data storage and transmission are further reduced through difference value coding, the frequency domain data can be accurately recovered to the time domain data through the inverse fast Fourier transform, and the accuracy of the data storage and transmission is improved. The data processing and uploading speed is increased, the data management efficiency and safety are enhanced, and efficient processing of large-scale data is supported.

To provide a magnetic recording device capable of improving recording density.SOLUTION: A magnetic recording device 210 includes a magnetic head 110 and a control unit 75. The magnetic head includes a first magnetic pole 31, a second magnetic pole 32, a magnetic element 20 provided between the first magnetic pole and the second magnetic pole, a first terminal T1 electrically connected to the first magnetic pole, a second terminal T2 electrically connected to the second magnetic pole, and a coil 30c. The control unit is electrically connected to the first terminal, the second terminal, and the coil. One end of the magnetic element is electrically connected to the first magnetic pole. The other end of the magnetic element is electrically connected to the second magnetic pole. The control unit can perform a recording operation. In the recording operation, the control unit supplies a recording current to the coil while applying an element voltage of a first voltage or more and a second voltage or less between the first terminal and the second terminal.SELECTED DRAWING: Figure 1

The present invention belongs to the field of data storage, and specifically relates to a method for detecting a readback signal sample sequence in a process of reading optical disc data, comprising: performing equalization filtering processing on the signal-to-signal crosstalk in the readback signal sample sequence; predicting and eliminating the remaining noise in the readback signal sample sequence after the equalization filtering processing to obtain a noise-eliminated readback signal sample sequence; performing sequence detection on the noise-eliminated readback signal sample sequence to obtain a detection result, wherein a state transition grid for sequence detection is constructed by an equivalent complete channel partial response target coefficient vector t including three processes of equalization filtering, noise prediction and elimination, t is represented by the difference between g and gp, g represents a preset partial response target coefficient vector, and p represents a preset prediction tap coefficient vector for prediction. The present invention can avoid the problem of high computational complexity caused by the inclusion of noise prediction and elimination operations in branch metrics.

The invention relates to the technical field of recording pen design, in particular to a recording system and method based on wireless communication and recording equipment, and the system comprises a microphone module which is used for receiving to-be-processed analog audio and converting the to-be-processed analog audio into to-be-processed digital signals; the processor module is used for receiving the to-be-processed digital signal and performing signal processing based on the to-be-processed digital signal so as to generate an audio digital data packet; and the antenna module is used for sending an audio digital data packet and receiving an instruction, and transmitting the audio digital data packet to the man-machine interaction equipment by adopting a preset Bluetooth protocol so as to display the audio in real time. According to the invention, the audio digital data packet which is convenient to store and automatically played can be obtained, so that automatic playing while recording can be realized, and the practicability of the recording equipment is improved.

Various aspects are directed to a data storage device comprising one or more disks, an actuator mechanism configured to position a selected head among one or more heads proximate to a corresponding disk surface among the one or more disks, and one or more processing devices. The one or more processing devices are configured to detect repeatable runout (RRO) noise components from a measurement of fly height of the selected head above one or more sectors of a fly height measurement track, and remove the detected RRO noise components from one or more per-sector readback signal measurements.

This invention relates to the field of noise reduction technology, and in particular to an intelligent noise reduction mode switching method and system. The method involves: acquiring real-time environmental data of the user device's current environment after recording begins; analyzing the real-time environmental data using a noise level assessment model to obtain the real-time noise level of the user device's current environment; correlating the real-time noise level with the amplitude of noise signal changes in the real-time environmental data; inputting the real-time environmental data into an environmental scene recognition model to obtain the real-time scene type corresponding to the user device's current environment; and automatically switching the user device to the corresponding target noise reduction mode based on the real-time noise level and the real-time scene type to ensure the recording quality of the user device. By analyzing environmental data from different perspectives through the noise level assessment model and the environmental scene recognition model, environmental adaptability is improved, noise reduction effect is enhanced, and recording quality is ensured to be unaffected by environmental changes.

Methods and units for determining median values in a data processing system (e.g. an image processing system) are provided, in which a stream of data values is received. A first median value of the received data values within a first subset of data values of the received stream is determined, and intermediate data used for determining the first median value is stored. The stored intermediate data is used to determine a median value of the received data values within a second subset of data values of the received stream, wherein the second subset at least partially overlaps with the first subset. The determined median values are outputted for use in the data processing system, e.g. for further processing.

The invention discloses a method for optimizing steel wire recording digital audio quality, which comprises the following steps of: S1, measuring abrasion of a main shaft and a belt pulley of a steel wire recorder, and adjusting a tolerance to be within an original design range; s2, the magnetic head is cleaned through ultrasonic waves, and metal coating is conducted again; s3, controlling power supply voltage fluctuation by adding a voltage stabilizer; s4, analyzing the audio signal in combination with a spectrum analysis tool, separating distortion and noise components, and performing noise reduction processing by using a spectrum De-Noise technology and a dynamic threshold value; and S5, expanding a frequency range through a Spectral Recovery technology, and carrying out equalization compensation on the signal by using MusicRebalance. According to the method, mechanical structure optimization, magnetic head performance recovery, power system stability improvement and a digital audio processing technology are combined, so that the digital audio quality of steel wire recording is remarkably improved, the sound quality of recording is optimized, noise interference of equipment is reduced, and audio playback is clearer and more real.

The invention relates to the technical field of noise reduction, in particular to an intelligent noise reduction mode switching method and system. The method comprises the following steps: after a recording is started, acquiring real-time environment data in an environment in which user equipment is currently located; performing noise analysis on the real-time environment data through a noise level evaluation model to obtain a real-time noise level of the environment where the user equipment is located currently; the real-time noise level is associated with the noise signal change amplitude in the real-time environment data; inputting the real-time environment data into an environment scene recognition model to obtain a real-time scene type corresponding to the current environment of the user equipment; and based on the real-time noise level and the real-time scene type, automatically switching to a corresponding target noise reduction mode for the user equipment so as to ensure the recording quality of the user equipment. The environment data is analyzed from different angles through the noise level evaluation model and the environment scene recognition model, the environment adaptability is improved, the noise reduction effect is improved, and it is ensured that the recording quality is not interfered by environment changes.

Various embodiments of the present invention provide a method and a device, the device comprising a microphone, a communication module, a memory comprising a transmission buffer, and a processor operatively connected to the microphone, the communication module, or the memory, wherein the processor is configured to establish a connection of a first communication link with a first external electronic device through the communication module, establish a connection of a second communication link with a second external electronic device through the communication module, acquire a microphone input signal by operating the microphone upon reception of a recording request from the first external electronic device, monitor a transmission environment with the communication module or the second external electronic device, determine a bit rate of audio, based on the transmission environment, encode the audio, based on the determined bit rate, and transmit the encoded audio data to the first external electronic device. Various embodiments are possible.