108 results about "Pulse-code modulation" patented technology

The invention provides a rising and falling control method and system for a PCM audio sampling rate, and belongs to the technical field of audio processing, and the method comprises the following steps: obtaining audio signal features of pulse code modulation PCM audio data, the audio signal features comprising spectrum energy distribution, instantaneous power, a signal-to-noise ratio and a peak-to-average ratio; monitoring hardware state parameters of the Bluetooth audio equipment in real time, wherein the hardware state parameters comprise a current representative processor load rate, a bandwidth occupancy rate and a current coding and decoding mode parameter; according to the predicted value of the target sampling rate, performing resampling processing on the PCM audio data by adopting a filtering processing method and an interpolation algorithm to obtain PCM audio data matched with the target sampling rate; the resampling processing comprises up-sampling processing or down-sampling processing; and inputting the PCM audio data matched with the target sampling rate to an audio output module of the Bluetooth audio equipment for playing. The audio quality, the computing resources and the transmission efficiency are optimized through self-adaptive resampling processing.

The invention relates to the field of data processing, in particular to an intelligent electric meter data optimization storage method, which comprises the following steps of: performing normalization, smoothing and abnormal value processing on multi-dimensional time series data such as electric energy, current, voltage and power; performing periodic analysis on time sequences of power, voltage, current and the like by using an autocorrelation function, and determining periodic intensity of the data; and finally, performing compression processing on the data through pulse code modulation (PCM), differential pulse code modulation (DPCM) and Huffman coding, thereby effectively improving the data compression rate, reducing redundancy, and ensuring optimization of data transmission efficiency and storage space. According to the invention, the ammeter data is compressed through periodic analysis and Huffman coding, so that the storage efficiency and the transmission efficiency are improved.

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.

The utility model relates to the technical field of thermal insulation boxes, in particular to a fully-assembled passive thermal insulation box inner temperature control chamber structure, which comprises a gel type PCM (Pulse Code Modulation) plate used for maintaining a specific temperature interval; the gel type PCM plate hanging bag is used for accommodating and fixing the gel type PCM plate; the supporting frame is used for supporting the gel type PCM plate hanging bag and comprises a top supporting rod, a vertical supporting rod, a bottom supporting rod and a supporting top plate, and all the parts are fixedly connected through bolts. According to the utility model, a temperature control chamber framework in the box body can be built and a gel type PCM can be fixed by matching with a hanging bag through a small number of standard general structural rod pieces and auxiliary components, the disassembly and assembly are simple and convenient, the operation convenience is improved, the rapid size switching of the box body is realized on the premise of not increasing any components, and the cost is reduced. The space utilization rate in the transportation and storage process is improved, the size of the box body can be flexibly changed and adjusted through the universal structural design, and the development time and cost of a new-size box type are greatly shortened and reduced.

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 present application discloses a display device and an audio processing method, which receives an access signal sent by an external device that has been connected, and determines that the external device that has been connected supports the first sound effect processing when the access signal contains a first identifier that supports the first sound effect processing; determines that the external device that has been connected does not support the first sound effect processing when the access signal does not contain the first identifier that supports the first sound effect processing; and parses the audio file into pulse code modulation data when the external device that has been connected does not support the first sound effect processing and the first sound effect has been turned on, performs at least the first sound effect processing on the pulse code modulation data, and sends the processed pulse code modulation data to the external device to instruct the external device to play audio based on the processed pulse code modulation data. The use of this method can greatly enhance the spatial sound field effect of the output.

An image decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: acquiring image information including a block-based delta pulse code modulation (BDPCM) constraint flag indicating whether or not BDPCM is constrained with respect to an image; acquiring BDPCM-associated information regarding a current block on the basis of the BDPCM constraint flag; and generating reconstructed samples for the current block on the basis of the BDPCM-associated information.

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.

The present disclosure relates to a BDPCM-based image decoding method for a luma component and a chroma component, and an apparatus therefor. An image decoding method performed by a decoding device according to the present document is characterized by comprising the steps of: acquiring block-based incremental pulse code modulation (BDPCM) available flags regarding whether BDPCM is available for chroma blocks and luma blocks; acquiring a BDPCM luminance flag on the basis of the BDPCM available flag as to whether to apply the BDPCM to the current luminance block; and acquiring, on the basis of the BDPCM available flag, a BDPCM chroma flag regarding whether to apply the BDPCM to the current chroma block.

Disclosed are an image decoding and encoding method, a method for transmitting a bitstream, and a medium. 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 of a current block; acquiring a BDPCM direction flag of the current block based on a BDPCM flag indicating that BDPCM is applied to 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.

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.

The present application relates to a method for encoding / decoding an image signal and an apparatus therefor. An image decoding method according to the present invention comprises the steps of: referencing a first flag for indicating whether intra block-based incremental pulse code modulation (BDPCM) signaled by a sequence parameter set is allowed, so as to determine whether to parse a second flag for indicating whether to apply the intra BDPCM to a current block; determining whether to apply the intra BDPCM to the current block based on a second flag; when it is determined that the intra-frame BDPCM is applied to the current block, determining an intra-frame BDPCM mode of the current block; and acquiring a residual sample point of the current block based on the intra-frame BDPCM mode.

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 low-dielectric-constant epoxy resin-based prepreg and a preparation method thereof, epoxy resin, a curing agent, an accelerant, a flexibilizer, a filler, color paste and the like are used as basic raw materials, and the epoxy resin adopts high-bromine epoxy resin as a flame retardant; a latent material is adopted as a curing agent and an accelerant; inorganic matters such as aluminum hydroxide, aluminum oxide, glass beads and metal antimony oxide are used as fillers, so that the insulating property of the material is improved, and the dielectric constant of the material is less than 5. The prepreg is prepared by adopting a hot melting method, release paper is coated with an epoxy resin matrix to obtain a resin adhesive film, then a glass fiber fabric is fully infiltrated by the resin matrix by applying certain pressure and temperature, and the preparation process is simple and reliable. The product has good mechanical property and molding effect, and the prepreg can be pressed into the required automobile battery cover at a proper curing temperature by adopting a PCM (Pulse Code Modulation) process.