77 results about "Pulse-code modulation" patented technology

The invention discloses a multipath effect suppression method for 2.4 GHz radio frequency identification. The multipath effect suppression method comprises a transmitting end processing flow and a receiving end processing flow. A transmitting end carries out pulse code modulation on an analog signal to obtain a digital signal, blocks the digital signal after channel coding, and distributes the digital signal to subcarriers through quadrature amplitude modulation; and generating a time domain OFDM symbol through IFFT (Inverse Fast Fourier Transform), adding a cyclic prefix and a synchronization head, converting into an analog baseband signal, and performing up-conversion, filtering, amplification and radiation. The receiving end amplifies the signal, down-converts the signal to a baseband, filters the signal and converts the signal into a digital signal; the method comprises the following steps of: synchronizing header frame alignment, recovering a coding bit stream through FFT (Fast Fourier Transform) and QAM (Quadrature Amplitude Modulation) demodulation, carrying out CRC (Cyclic Redundancy Check) after decoding and merging, returning ACK (Acknowledgement Character) if According to the method, the multipath effect can be effectively inhibited, and the integrity of received data is improved.

A method for video processing, comprising: performing a conversion between a video unit of a video and a bitstream of the video according to a rule, wherein the rule specifies whether the bitstream includes at least one of control flags for a chrominance block-based differential pulse code modulation (BDPCM) mode, a palette mode, or an adaptive color transform (ACT) mode based on a value of a chrominance array type of the video.

A method of video encoding includes performing context modeling to determine a context model for each of a number of bins of syntax elements corresponding to residues of a region of a transform skipped block in a current picture. The number of the bins of syntax elements being context coded does not exceed a maximum number of context coded bins set for the region. The method further includes encoding, according to Block Differential Pulse Code Modulation (BDPCM), the syntax elements based on the determined context models. When the maximum number of context coded bins is reached, remaining bins of syntax elements are encoded based on a bypass model.

The invention provides a continuous wave mud pulse code modulation method, device and equipment and a storage medium, and belongs to the technical field of oil and gas drilling. The method comprises the following steps: encoding detected target acquisition information into a multi-system code element; two code elements are taken as a group to form a code element group, and the code element group controls the rotating speed of a rotor together to form a modulated pressure wave signal for determining a phase delay degree and a phase switching position corresponding to the phase delay degree; wherein the phase switching position is a time period when the corresponding phase delay degree occurs in a modulation period of the code element group to the pressure wave signal. According to the invention, on the premise of not additionally occupying frequency band resources, the transmission information amount is doubled, so that the signal transmission rate based on the continuous wave mud pulse is doubled, and the defect of low transmission rate in the traditional code modulation mode for the continuous wave mud pulse is overcome.

The invention discloses a voltage measurement method based on pulse coding and related equipment, relates to the technical field of voltage measurement, and solves the problem of low voltage measurement precision. The method comprises the following steps: generating a pseudo-random coding sequence with sparse time domain, and modulating a pilot frequency reference signal based on the pseudo-random coding sequence to obtain a low-frequency pulse modulation wave; performing pulse power amplification on the low-frequency pulse modulation wave, and migrating a signal frequency band to a high-frequency range to obtain a high-frequency pulse train; and after the high-frequency pulse train is injected into the measured line, acquiring a coupling signal, and extracting a characteristic component corresponding to the pseudo-random coding sequence from the coupling signal so as to invert the voltage value of the measured line. According to the invention, the pilot frequency reference signal based on pulse code modulation is adopted to replace a continuous sine wave, so that the power consumption of signal injection can be reduced; and the corresponding characteristic component in the coupling signal is identified through the pseudo-random coding sequence, so that interference of a strong electromagnetic signal can be avoided, and the voltage measurement precision is improved.

The present invention provides a BDPCM-based image decoding method and an apparatus therefor. According to the present invention, an image decoding method performed by a decoding device is characterized by comprising: a step for determining whether the width and height of a current block are less than or equal to a maximum transform block size; a step for acquiring a BDPCM flag indicating whether block-based incremental pulse code modulation (BDPCM) is applied to the current block when the width and height are less than or equal to the maximum transform block size; a step for acquiring, on the basis of the BDPCM flag, a BDPCM direction flag indicating a prediction direction for the current block; a step for deriving a prediction sample of the current block on the basis of an intra prediction mode derived on the basis of a BDPCM direction flag; and a step for deriving a recovery sample of the current block on the basis of the prediction sample.

Video coding and decoding methods are described. An example method includes performing a conversion between a current video block of a video and a bitstream representation of the current video block by determining a first intra coding mode to be stored which is associated with the current video block using a differential coding mode, where the first intra coding mode associated with the current video block is determined according to a second prediction mode used by the differential coding mode, and where, in the differential coding mode, a difference between a quantized residual of an intra prediction of the current video block and a prediction of the quantized residual is represented in the bitstream representation for the current video block using a differential pulse coding modulation (DPCM) representation.

The invention discloses a PCM (Pulse Code Modulation) collector dynamic framing IP core and method based on an FPGA (Field Programmable Gate Array). The IP core comprises a register access module, a DNA authorization module, an acquisition frame processing module, a framing control module and a PCM coding module. Comprising the following steps: performing parameter configuration on an IP core register; the DNA authorization module verifies the authorization key; the acquisition frame processing module receives and caches the acquisition frames in parallel and assembles PCM frame data; and performing PCM coding according to the code pattern configured by the register. The method has the beneficial effects that the frame format is high in universality, high in flexibility and high in deployment efficiency; predefinition and rapid dynamic switching of three frame formats are supported; parallel framing of 32 paths of acquisition frames is supported; common PCM code pattern output is supported; all functions can be accessed through a register, and extra logic is not needed; the register interface adopts a standard AXI-Lite interface; and a DNA authorization function is integrated.

The utility model provides a battery which comprises a battery cell structure and a connecting structure arranged at one end of the battery cell structure, the connecting structure comprises a PCM (Pulse Code Modulation), a hot melt adhesive and a rubber shell, and the PCM is fixedly connected with the rubber shell in a hot melt adhesive low-pressure injection molding packaging mode. According to the battery disclosed by the utility model, the battery protection module mounted at the head of the battery cell structure and the rubber shell are subjected to low-pressure injection molding packaging by using the hot melt adhesive, so that excellent bonding strength and sealing performance between the battery protection plate and the battery shell are realized, the structural stability of battery assembly can be improved, and the appearance quality of the battery is optimized; and meanwhile, the production efficiency and the environmental protection performance of the product are improved.

Systems, methods, and instrumentalities are disclosed for video coding. Video coding may be or may include video encoding and / or video decoding. In examples, a coding device, such as an encoder and / or a decoder, may obtain a coding block associated with a video content. The coding device may determine whether transform skip and / or block differential pulse coded modulation (BDPCM) associated with the coding block has been enabled. Based on a determination that the transform skip and / or BDPCM has been enabled, the coding device may obtain a coefficient associated with the coding block. The coding device may obtain a plurality of predicted signs, e.g., based on the obtained coefficient. In examples, the coding device may predict BDPCM direction.

An image encoding / decoding method and apparatus are provided. An image decoding method according to the present disclosure may include parsing, from a bitstream, first information specifying whether block difference pulse code modulation (BDPCM) applies to an intra-predicted current block, determining a prediction direction of BDPCM for the current block and generating a residual block of the current block based on the determined prediction direction of BDPCM, based on the first information specifying that BDPCM applies to the current block, generating a prediction block of the current block, by performing intra prediction based on an intra prediction mode of the current block, and reconstructing the current block based on the residual block and the prediction block.

An image encoding / decoding method and apparatus are provided. An image decoding method according to the present disclosure may include parsing, from a bitstream, first information specifying whether block difference pulse code modulation (BDPCM) applies to an intra-predicted current block, determining a prediction direction of BDPCM for the current block and generating a residual block of the current block based on the determined prediction direction of BDPCM, based on the first information specifying that BDPCM applies to the current block, generating a prediction block of the current block, by performing intra prediction based on an intra prediction mode of the current block, and reconstructing the current block based on the residual block and the prediction block.

The present invention relates to the field of data processing, and particularly to an intelligent electric meter data optimization storage method. It performs normalization, smoothing, and outlier processing on multi-dimensional time series data such as electric energy, current, voltage, and power. Subsequently, it uses the autocorrelation function to perform periodic analysis on time series such as power, voltage, and current to determine the periodic intensity of the data. Finally, it compresses the data through pulse code modulation (PCM), differential pulse code modulation (DPCM), and Huffman coding, thereby effectively improving the data compression rate and reducing redundancy, ensuring the optimization of data transmission efficiency and storage space. The present invention compresses the electric meter data through periodic analysis and Huffman coding, thereby improving the storage efficiency and transmission efficiency.

An image decoding method according to the present invention comprises the steps of: referring to a first flag for indicating whether intra block-based delta pulse code modulation (BDPCM) signaled through a sequence parameter set is permitted, so as to determine whether a second flag for indicating whether the intra BDPCM is applied to a current block is parsed; determining whether the intra BDPCM is applied to the current block on the basis of the second flag; determining an intra BDPCM mode of the current block when it is determined that the intra BDPCM is applied to the current block; and acquiring a residual sample of the current block on the basis of the intra BDPCM mode.

The application provides a video image fast clipping and dimension reduction method and system based on a hierarchical bounding box, applied to the technical field of image processing, wherein the method collects multi-view dynamic scene point cloud data, and then divides the space by using a hierarchical bounding box to establish a bounding box structure with density characteristics; subsequently, optical diffraction array pre-filtering is used, and point clouds are separated based on wavelength selectivity and density distribution to generate a first subset and a background subset; then, adaptive pulse code modulation is used on nodes in the first subset to obtain high-precision data, and nodes in the second subset are compressed into low-code-rate data by using run-length encoding; subsequently, the two types of data are input into an improved k-d tree based on the spatial relationship of the bounding box to generate a two-dimensional point set representing key features, and a spatial index is constructed to realize real-time scene retrieval. The application can realize image dimension reduction while retaining key geometric features of the image, thereby improving efficient real-time spatial retrieval in a dynamic scene.

The present invention relates to a video signal processing method and apparatus using a block DPCM prediction method. The present disclosure relates to a method and apparatus for processing a video signal, and more specifically, comprises the steps of: parsing block-based incremental pulse code modulation (BDPCM) enabling information indicating whether BDPCM has been enabled from a bitstream; when the BDPCM enabling information indicates that the BDPCM has been enabled, the width of the current block is less than or equal to a first value, and the height of the current block is less than or equal to a second value, parsing intra-frame BDPCM information indicating whether to apply the BDPCM to the current block from the bitstream; when the intra-frame BDPCM information indicates that BDPCM is applied to the current block, parsing intra-frame BDPCM direction information on the current block from the bitstream; and reconstructing the current block based on the intra BDPCM direction information.

According to the present disclosure, a method of image decoding performed by a decoding device includes determining whether a width and a height of a current block are less than or equal to a maximum transform block size, obtaining a block-based delta pulse code modulation (BDPCM) flag indicating whether BDPCM is applied to the current block when the width and the height are less than or equal to the maximum transform block size, obtaining a BDPCM direction flag indicating a prediction direction for the current block based on the BDPCM flag, deriving prediction samples of the current block based on an intra prediction mode derived based on the BDPCM direction flag, and deriving reconstructed samples of the current block based on the prediction samples.

The present invention provides a method and system for separating range-ambiguous clutter of a radar, which relates to the technical field of radar clutter processing, and includes: Step S1: According to the actual situation, perform azimuth pulse coding modulation on the transmitted signal of a multi-channel radar; Step S2: Perform azimuth pulse coding modulation with different phase factors on adjacent frames, and the modulation factors are obtained by theoretical calculation; Step S3: By demodulating the azimuth pulse coding at the receiving end, obtain the received echo signals of two adjacent frames; Step S4: Combine the processing results of adjacent frames to compensate for the detection blind area of the azimuth pulse coding. The present invention can effectively separate the range-ambiguous clutter of a multi-channel radar and overcome the deficiency of the existing azimuth pulse coding method that has a repeated detection blind area.

An image decoding method performed by a decoding device according to the present document is characterized by comprising the steps of: acquiring image information including a Block-based Delta Pulse Code Modulation (BDPCM) available flag; and generating a reconstructed picture on the basis of the image information, wherein the BDPCM available flag relates to whether BDPCM is available for chroma and luma blocks.

In some aspects, an electronic device may receive a plurality of haptic signals associated with a plurality of haptic events, wherein the plurality of haptic events overlap in a time domain. The electronic device may generate a mixed haptics signal that combines the plurality of haptic signals in a mechanical acceleration domain, wherein the mixed haptics signal preserves timing or synchronization information associated with the plurality of haptic signals. The electronic device may generate an output stream to be provided to a haptic actuator, wherein the output stream includes a pulse code modulation (PCM) voltage signal based on the mixed haptics signal that combines the plurality of haptic signals. Numerous other aspects are described.

In some aspects, an electronic device can receive multiple tactile signals associated with multiple tactile events, wherein the multiple tactile events overlap in the time domain. The electronic device can generate a hybrid tactile signal that combines the multiple tactile signals in the mechanical acceleration domain, wherein the hybrid tactile signal stores timing or synchronization information associated with the multiple tactile signals. The electronic device can generate an output stream to be provided to a tactile actuator, wherein the output stream includes a pulse code modulation (PCM) voltage signal based on the hybrid tactile signal combining the multiple tactile signals. Numerous other aspects are described.

The invention discloses a carrier rocket video image measurement system, and relates to the technical field of rocket video image transmission, and the system comprises the steps: a plurality of network cameras respectively collect the video image data of rocket monitoring points, and output the video image data after compression; the telemetering transmission equipment is respectively connected with each network camera, receives the compressed video image data, frames the compressed video image data according to a preset frame format to form multiple paths of pulse code modulation code streams, and outputs ground-based radio-frequency signals after frequency modulation; the ground-based power amplifier unit is connected with the telemetering transmission equipment, receives the ground-based radio frequency signal, amplifies the ground-based radio frequency signal and And the antenna is connected with the ground-based power amplifier unit, receives the amplified ground-based radio frequency signal, and sends the ground-based radio frequency signal to ground test equipment through a radio signal. And the ground test equipment receives a ground-based radio frequency signal through the antenna, demodulates the ground-based radio frequency signal, decodes the ground-based radio frequency signal, and then displays The problem of video image analysis delay caused by low transmission rate in the prior art is solved.

Provided is a semiconductor device including: a pulse-width modulation circuit configured to pulse-width modulate a signal based on a first pulse-code modulated signal that is a sound source signal, and output a first pulse-width modulated signal; a first conversion circuit configured to convert a second pulse-width modulated signal based on the first pulse-width modulated signal into a second pulse-code modulated signal; and a comparison circuit configured to convert the first pulse-code modulated signal into a first comparison target signal by an inversely convertible conversion method, convert the second pulse-code modulated signal into a second comparison target signal by the conversion method, and compare the first comparison target signal with the second comparison target signal.

The invention provides an audio power amplifier, electronic equipment and an intelligent cockpit, the audio power amplifier comprises a data bus interface, a pulse code modulation data route, at least one power amplification module and at least one loudspeaker, the data bus interface comprises a first integrated circuit built-in audio I2S bus interface and a time division multiplexing TDM module, and the power amplification module comprises a first integrated circuit built-in audio I2S bus interface and a second integrated circuit built-in audio I2S bus interface. The pulse code modulation data router comprises a second integrated circuit built-in audio I2S bus interface and at least one time division multiplexing TDM time slot module, the first integrated circuit built-in audio I2S bus interface is connected with the second integrated circuit built-in audio I2S bus interface, and the TDM time slot module is connected with the at least one time division multiplexing TDM time slot module. And the second integrated circuit built-in audio I2S bus interface and the at least one time division multiplexing TDM time slot module are respectively connected with the at least one power amplification module in a one-to-one manner. According to the invention, the hardware cost can be reduced while the spatial audio effect is achieved.

An image decoding method performed by a decoding device according to the present document is characterized by comprising the steps of: acquiring image information including a Block-based Delta Pulse Code Modulation (BDPCM) available flag; and generating a reconstructed picture on the basis of the image information, wherein the BDPCM available flag relates to whether BDPCM is available for chroma and luma blocks.

The invention discloses a federated learning cold start method and system based on an FPGA dynamic watermark, and the method comprises the following steps: 1, obtaining a preset watermark bit stream at an edge node of a client, and relates to the technical field of federated learning and privacy calculation crossing. According to the method, the watermark bit stream is embedded into the low level of the shadow vector through the FPGA watermark embedding device by adopting the differential pulse code modulation, so that the watermark information carried by the embedded watermark bit stream has the anti-noise capability, the watermark embedding strength lambda is dynamically adjustable, the dynamic self-adaptive adjustment of the watermark strength is realized, and the watermark embedding efficiency is improved. Therefore, the anti-stripping capability of the watermark is enhanced, and model pruning, fine tuning and DLG reverse attack can be effectively resisted.

The invention provides a PCM-based mapping table hierarchical storage and dynamic updating method and system, and the method comprises the steps: dividing a mapping table according to a logic address space when an SSD controller initializes a system, and building a DDR cache region and a PCM intermediate layer; the SSD controller establishes a popularity statistical table; entries of a high-frequency or key starting area are loaded into a DDR cache region, and full entries are stored into a PCM intermediate layer; when the host sends a read-write request to the SSD controller, the SSD controller preferentially searches the corresponding mapping entry from the DDR cache region; if the corresponding mapping entry is not found, searching the corresponding mapping entry from the PCM intermediate layer; if the mapping entry is found, loading the accessed mapping entry into a DDR cache region from a PCM intermediate layer, and updating the heat; and realizing adaptive migration between the DDR and the PCM based on the access heat item.

Methods, systems, and devices are described for implementing adaptive color transform (ACT) and block-based delta pulse code modulation (BDPCM) during image / video encoding or decoding. An example method of video processing includes, for a conversion between a current video unit of a video that is a chroma video unit and a bitstream representation of the video, determining, based on a rule, whether a block-based delta pulse code modulation (BDPCM) mode is available, and performing the conversion based on the determination, where the rule is based on whether an adaptive color transform (ACT) mode is used to code the current video unit and / or whether the BDPCM mode is used to code a luma video unit corresponding to the current video unit.

An image decoding method performed by a decoding device according to the present document comprises the steps of: acquiring a block-based delta pulse code modulation (BDPCM) flag for a current block; on the basis of the BDPCM flag indicating that BDPCM is applied to the current block, acquiring a BDPCM direction flag for the current block; and storing, as an intra-prediction mode of the current block, an intra-prediction mode of a prediction direction derived on the basis of the BDPCM direction flag.

The present invention relates to a video signal processing method and apparatus using a block DPCM prediction method. The present disclosure relates to a method and apparatus for processing a video signal, and more specifically, comprises the steps of: parsing block-based incremental pulse code modulation (BDPCM) enabling information indicating whether BDPCM has been enabled from a bitstream; when the BDPCM enabling information indicates that the BDPCM has been enabled, the width of the current block is less than or equal to a first value, and the height of the current block is less than or equal to a second value, parsing intra-frame BDPCM information indicating whether to apply the BDPCM to the current block from the bitstream; when the intra-frame BDPCM information indicates that BDPCM is applied to the current block, parsing intra-frame BDPCM direction information on the current block from the bitstream; and reconstructing the current block based on the intra BDPCM direction information.