147 results about "Block transform" patented technology

The invention discloses a multi-channel high-speed sampling data storage system and a control method. The system comprises a disk array, an upper computer, a DDR3 memory particle cache module, a PXIe transport protocol module, an Aurora transport protocol module, a DDR3 memory bank cache module, a data acquisition and signal processing module and an A / D conversion module. The control method comprises the steps that an upper computer issues a control instruction in a PIO mode through a PXIe transmission protocol module and issues reconfiguration data in a DMA reading mode, a first FPGA chip stores the reconfiguration data into a DDR3 memory particle cache module, and reconfiguration of a second FPGA chip is initiated; after configuration is completed, the first FPGA chip transmits a control command and parameters to the second FPGA chip through an Aurora protocol, receives a digital intermediate frequency signal converted by the A / D conversion module according to the command, and carries out corresponding signal processing and logic control in three modes of single point, real time and triggering according to an instruction of an upper computer.

Some aspects of the disclosure provide a method of video decoding. In some examples, values of one or more target quantization coefficients in a target region of quantization coefficients of a current block are obtained. A sub-block transform (SBT) mode of the current block is derived based on the values of the one or more target quantization coefficients in the target region. The current block is reconstructed based on the SBT mode of the current block. Apparatus and non-transitory computer-readable storage medium counterpart embodiments are also contemplated.

Systems, methods, and instrumentalities are disclosed for performing subblock transform (SBT) applied to inter block copy (IBC) and intra template matching prediction (TMP). SBT may be performed in combination with IBC and intra TMP. A coding unit predicted by IBC or intra TMP may benefit from performing SBT (e.g., splitting the coding block into a zero spatial sub-part and a non-zero coded sub-part).

Some embodiments of a method can include obtaining a point cloud, which can include a first set of information describing geometry of the point cloud and a second set of information describing attributes of the point cloud; performing geometry encoding of the first set of information to generate a geometry bitstream; performing a two-stage attribute compression process to generate an attribute bitstream, wherein a first stage of the two-stage attribute compression process includes performing a block transform on each node of a set of nodes of the point cloud, and wherein a second stage of the two-stage attribute compression process includes performing hierarchical encoding on the set of nodes of the point cloud, and outputting an output bitstream including the geometry bitstream and the attribute bitstream.

An image decoding method according to the present document comprises a step of deriving a residual sample for a current block on the basis of a transform coefficient, wherein the step of deriving the transform coefficient can comprise the steps of: determining whether a sub block transform for performing a transform by dividing a coding unit is applied to the current block; determining whether a multiple transform selection (MTS), for which a plurality of transform kernels are used, is applied to the current block; and setting the size of a transform block to which the transform is to be applied, on the basis of whether the sub block transform is applied to the current block and whether the multiple transform selection is applied to the current block.

A method and apparatus are provided for video encoding and decoding. Regarding a method for encoding, the method includes encoding a coding unit using a sub-block transform including a plurality of transform units. Encoding the coding unit includes defining a residual block for a first transform unit of the plurality of transform units. The first transform unit extends across a medial portion of the coding unit to at least one of a first pair of opposed edges of the coding unit while being spaced by transform blocks of second and third transform units of the plurality of transform units from a second pair of opposed edges of the coding unit. The method also includes causing storage and / or transmission of motion information, a prediction block identified by the motion information to be associated with the coding unit, and information regarding the residual block for the first transform unit.

A process for selecting a transform set for a prediction block. The process can be used in both an encoder and a decoder. For example, the process can be used in both an encoder and a decoder for a prediction block that has been predicted from a reference block. In some embodiments, both the prediction block and the reference block are intra blocks.

The embodiments of the present application provide a video encoding and decoding method, device, computer-readable medium and electronic device. The video decoding method includes: obtaining a coding block of a video image frame; if the coding block needs to be transformed into a sub-block, determining the division mode that the coding block can adopt according to the maximum allowed sub-block size ratio and the size of the coding block; based on the division mode that the coding block can adopt, determining the target division mode used when performing sub-block transformation on the coding block; dividing the coding block based on the target division mode, and decoding the multiple sub-blocks obtained by the division. The technical solution of the embodiment of the present application can avoid the generation of overly narrow sub-blocks when using SBT technology, thereby ensuring the performance of the hardware.

An example method of video decoding includes receiving a video bitstream that includes multiple blocks, including a current block. The method also includes identifying a partial region of the current block, where residual data for the current block outside of the partial region is zero, and reconstructing the current block by applying a subblock transform to the partial region of the current block. Instructions for the example method may be stored in a computer system or storage medium.

There is a problem in that implicit MTS performance is lost in a case that the implict MTS is combined with secondary transform. The present invention provides an image decoding apparatus that can more preferably apply transform by MTS and secondary transform. A video decoding apparatus includes: a second transformer configured to apply transform using a transform matrix to the transform coefficient to modify the transform coefficient in a case that secondary transform is enabled; a first transformer configured to apply separate transform including vertical transform and horizontal transform to the transform coefficient; and an implicit transform configuration unit configured to disable implicit transform in a case that the secondary transform is enabled, an intra subpartition mode is not used, and subblock transform is not used, and configured to derive a horizontal transform type according to a width of a target TU and derive a vertical transform type according to a height of the target TU in a case that the implicit transform is enabled. The first transformer performs transform according to the vertical transform type, and transform according to the horizontal transform type.

The invention provides a video encoding and decoding method and a related device. The video encoding and decoding method comprises: receiving input data related to a current block in a current picture, the input data comprising residual data of the current block for encoding at an encoder end or transform coefficients of the current block for decoding at a decoder end, the prediction data of the current block is generated by applying intra block copying or intra template matching prediction; applying a target transform pattern to the current block to derive a final transform coefficient at the encoder side or to derive reconstructed residual data at the decoder side, where the target transform pattern includes a sub-block transform or a partial transform, and wherein the sub-block transform divides the current block into a plurality of sub-blocks and applies transform processing to one or more sub-blocks that are target portions of the current block, or the partial transform applies transform processing only to the target portions of the current block; and providing the final transform coefficient at the encoder side or the reconstructed residual data at the decoder side. According to the video coding and decoding method and the related device, the coding and decoding efficiency can be improved.

The invention provides a multi-head attention processing method, a related device and a medium, and the method comprises the steps: dividing an input matrix into a first number of sub-blocks, and carrying out the first linear transformation through a first number of processing units, and obtaining a first number of first transformed sub-blocks; performing sub-block transformation on a first number of first transformed sub-blocks corresponding to the first number of processing units to obtain a second transformed sub-block corresponding to each processing head, and inputting the second transformed sub-block into a processing head corresponding to the second transformed sub-block for attention calculation to obtain a first attention result sub-block; and performing sub-block inverse transformation on the first attention result sub-blocks corresponding to the processing heads to obtain second attention result sub-blocks corresponding to the processing units, and generating a multi-head attention result matrix based on the second attention result sub-blocks. The multi-head attention processing efficiency can be improved, and the multi-head attention processing method and device can be applied to scenes such as artificial intelligence assistants and machine translation.

The present application belongs to the field of computer vision and image processing, aiming at the double bottleneck of "semantic overfitting" and "space-frequency feature mislocation" existing in the existing deep fake detection, the present application proposes a deep fake face detection method based on dual domain. The present application constructs a dual domain complementary architecture of dual domain deep fake detection network DDSF-Net based on semantic suppression and space-frequency alignment, the micro mark difference module in the network significantly enhances the residual subtle fake artifacts between pixels by eliminating redundant face attributes. And the space-frequency mapping module uses the block transformation strategy to adaptively mine the abnormal distribution of frequency domain, realizes the multi-dimensional enhancement of the fake features. At the same time, through the complementary fusion of dual domain features, the detection accuracy and generalization are effectively balanced. Extensive experiments on multiple benchmark datasets show that the performance of the method in the same dataset and cross dataset scenarios is significantly better than that of the existing advanced technology.

The present invention relates to a device (e.g., a decoder for video decoding) that can determine that a sub-block transform (SBT) is enabled for a video block. The device can determine whether a secondary transform (e.g., a low-frequency non-separable transform (LFNST) or a non-separable primary transform (NSPT)) is enabled for the video block. The device can determine a transform function to decode the video block based on determining whether the secondary transform is enabled for the video block. For example, a first type of transform function (e.g., discrete cosine transform (DCT) II) can be used to decode the video block if the LFNST or NSPT is enabled for the video block. A second type of transform function can be used to decode the video block if the secondary transform is disabled for the video block. The device can decode the video block using the transform function.

A decoder for decoding a one-dimensional digital waveform signal from a data stream by use of block-wise transform decoding, the decoder configured to decode a sequence of transform coefficients of a predetermined block of the one-dimensional digital waveform signal from the data stream by deriving a position information from the data stream, locating, using the position information, a position in the sequence of transform coefficients; and decoding one or more first transform coefficients of the sequence of transform coefficients from the data stream, which precede the position in the sequence of transform coefficients, and attributing a predetermined value to one or more second transform coefficients of the sequence of transform coefficients, which follow the position in the sequence of transform coefficients. Further disclosed is an encoder, a system, methods, a data stream and a computer program.

A spectral representation of an audio signal having consecutive audio frames can be derived more efficiently, when a common time warp is estimated for any two neighbouring frames, such that a following block transform can additionally use the warp information. Thus, window functions required for successful application of an overlap and add procedure during reconstruction can be derived and applied, the window functions already anticipating the re-sampling of the signal due to the time warping. Therefore, the increased efficiency of block-based transform coding of time-warped signals can be used without introducing audible discontinuities.

The invention discloses a depth time-frequency denoising transformation defense method for a frequency spectrum monitoring model. The method comprises the following steps: step 1, constructing a depth time-frequency denoising transformation defense architecture comprising a depth denoising module, a transformation module and a pre-trained automatic modulation classification model; step 2, in a deep denoising module, short-time Fourier transform is used to map an input data sample into a time-frequency matrix, the difference between an original sample xs and an adversarial sample xa is amplified, and a time-frequency domain signal is reconstructed under the supervision of depth features extracted by a feature extractor; 3, inputting the reconstructed original sample and the confrontation sample into a transformation module, generating transformation matrixes Ms and Ma specific to the samples, and obtaining a transformed original sample # imgabs0 # and a transformed confrontation sample # imgabs1 #; and 4, inputting the transformed original sample # imgabs2 # and the transformed confrontation sample # imgabs3 # into a pre-trained automatic modulation classification model, and realizing the classification decision of the signal.

A method of encoding images into a bitstream, the method comprises determining a residual subblock comprising an area of a residual block for a block to be encoded, and encoding transform coefficients of a transform block to be encoded based on the residual subblock area. A corresponding method comprises decoding images from a bitstream. The methods may comprise obtaining a prediction information portion of a block, comprising a plurality of samples for the block and determining the residual subblock based on the prediction samples. The methods may comprise inferring the position of the residual subblock. The process may be an Advanced Subblock Transform (ASBT) process. The method may comprise selectively encoding an orientation of the transform block in the bitstream, and wherein the orientation of the transform block is context-adaptive binary arithmetic coding (CABAC) coded; wherein at least one CABAC context is associated with the orientation of the transform block. [Fig. 14]

The present application relates to the technical field of radar sensor, and relates to a millimeter wave radar echo signal processing method and system. When the surrounding environment is detected by a millimeter wave radar, a transmitting array generates and transmits FMCW radar wave detection pulses, a receiving array receives echo signals of the radar wave detection pulses reflected by targets in the environment, and the echo signals enter a receiving signal processor. The received signal pulses are converted into radar digital baseband signal sequences by a radio frequency front end module, a radar echo digital baseband intermediate signal sequence is obtained through first step digital baseband signal processing, the radar echo digital baseband intermediate signal sequence is transmitted to hardware for performing second step digital baseband processing through a high-speed data interface, the second step digital baseband processing is performed, CFAR and AoA detection are finally performed, and information of the detected target is obtained. Compared with a traditional scheme, the data amount of inter-chip transmission is greatly reduced, so that the baseband data scale that can be processed by the radar system is increased, and the radar detection capability is improved.

An example method of video decoding includes receiving a video bitstream that includes multiple blocks, including a current block. The method also includes identifying a partial region of the current block, where residual data for the current block outside of the partial region is zero, and reconstructing the current block by applying a subblock transform to the partial region of the current block. Instructions for the example method may be stored in a computer system or storage medium.

To predict at high speed and with accuracy, a time series signal related to biological information of a patient.SOLUTION: A time series signal prediction device has a time series signal acquisition part, a block conversion part, a feature vector acquisition part, and a feature vector conversion part. The time series signal acquisition part acquires a time series signal related to biological information of a patient. The block conversion part divides the time series signal into partial signals for each prescribed interval, for converting the time series signal into a block signal having a shorter time series than the time series of the time series signal. The feature vector acquisition part outputs a feature vector which indicates a time series signal in the future time relative to an acquisition time point of the time series signal, from the block signal. The feature vector conversion part converts the feature vector into a prediction signal related to the biological information of the patient.SELECTED DRAWING: Figure 2

This disclosure provides a method, apparatus, storage medium, and electronic device for quantizing feature data in a model. The method includes: acquiring feature data to be quantized from a target model deployed on a target device, wherein the feature data includes at least two data blocks; performing an inter-block transformation on the feature data using a pre-constructed inter-block orthogonal transformation matrix to obtain inter-block transformed data; performing an intra-block transformation on each data block included in the inter-block transformed data using a pre-constructed intra-block orthogonal transformation matrix to obtain intra-block transformed data; and quantizing the intra-block transformed data to obtain quantized feature data. This disclosure can evenly distribute the energy of the feature data across all blocks, eliminating the influence of high-variance blocks on the quantization sharing index, and redistributing the intra-block data so that the intra-block data is evenly mapped to each codeword interval of the codebook, solving the codebook collapse problem and thus significantly improving quantization accuracy.

Embodiments in the present specification provide a method and device for processing video signal including steps of: obtaining a sub-block transform (SBT) flag indicating whether a SBT is applied, wherein the SBT represents a transform applied to a transform unit corresponding to one of subblocks split from a coding unit; determining a variable value related to a transform target region based on the SBT flag and a size value of the transform unit, wherein if the SBT flag equals to 1 and the size value is greater than a threshold value, the variable value is determined as the threshold value; obtaining position information of a last significant coefficient according to a scan order within the transform unit, wherein the position information of the last significant coefficient is coded based on the variable value; and performing an inverse-transform based on the position information of the last significant coefficient.

Provided in the present application are a video coding method and apparatus, a video decoding method and apparatus, and an electronic device and a computer-readable storage medium, which methods and apparatuses can improve the efficiency of coding and decoding. The video decoding method comprises: acquiring a target quantization coefficient in a target region in a current block; on the basis of the target quantization coefficient in the target region, determining a sub-block transformation mode corresponding to the current block; and decoding the current block on the basis of the sub-block transformation mode corresponding to the current block.

A system including a proportional-integral-derivative (PID) controller, a modified relay feedback test (MRFT) block, a memory block, a biasing block, a dq0-to-abc transformation block, a switch configured to selectively couple output signal of the biasing block or the PID controller output signal to the input of the dq0-to-abc transformation block, a three phase digital pulse width modulator, electronic switches, a voltage sensor configured to measure the output of each voltage of the three phases on the load and produce voltage data signals (Voa, Vob, Voc), and an abc-to-dq0 transformation block having an input being a representative of the phase voltages on the load, and producing an output being a representative of these voltages in the dq0 format.

A mechanism for processing video data is disclosed. The mechanism includes determining to apply a sub-block transform (SBT) to an intra-predicted coding unit (CU). A conversion is performed between a visual media data and a bitstream based on the intra-predicted CU. For example, a CU can be split into subblocks for intra prediction and then the SBT can be applied to the residual of each subblock.

A method for deblocking at least one boundary of a coding unit. The method includes determining that the coding unit uses a sub-block transform, wherein the sub-block transform generates a transform sub-block boundary within the coding unit, thereby forming at least a transform sub-block within the coding unit; as a result of determining that the coding unit uses the sub-block transform, determining a maximum filter length based on a dimension of the transform sub-block within the coding unit, wherein the maximum filter length indicates a maximum number of samples to modify when deblocking a boundary of the coding unit; and deblocking the boundary of the coding unit based on the determined maximum filter length.