121 results about "Nonzero coefficients" patented technology

Systems and methods related to prioritization of non-zero coefficients for Channel State Information (CSI) for Coherent Joint Transmission (CJT) are disclosed. Embodiments of a UE and corresponding embodiments of a method performed by a UE for CJT CSI feedback in which non-zero coefficients of a precoding matrix indicator (PMI) feedback are prioritized are disclosed. Embodiment of a network node and corresponding embodiment of a method performed by a network node for CJT CSI feedback in which non-zero coefficients of a PMI feedback are prioritized are also disclosed.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, an indication of an uplink resource associated with reporting channel state information (CSI). The UE may transmit, to the network node and using the uplink resource, uplink control information (UCI) including a CSI report that indicates precoding matrix indicator (PMI) values, based at least in part on prioritizing groups of information associated with the CSI report, at least one group, of the groups, being associated with time domain basis index values and non-zero coefficients of a coefficient matrix of a codebook associated with the CSI report. Numerous other aspects are provided.

An image processing method and a codec are disclosed. The method includes: determining a quantized coefficient block obtained by quantizing a transform unit of an image; if quantized coefficients in the quantized coefficient block are all zeros, determining a quantized parameter threshold of the quantized coefficient block based on a base coefficient matrix for transforming the transform unit; and adjusting quantized coefficients at M locations in the quantized coefficient block based on the quantized parameter threshold. None of the adjusted quantized coefficients at the M locations is zero, and coefficients in a reconstructed residual coefficient block obtained by dequantizing and inversely transforming an adjusted quantized coefficient block are all zeros. According to the method, when the quantized coefficients are all zeros, a quantized coefficient block including a non-zero coefficient can be generated, and reconstructed residual coefficients obtained by dequantizing and inversely transforming the quantized coefficient block including the non-zero coefficient are all zeros.

There is provided a method at a network node of a communication network, comprising: receiving an uplink reference signal from a user equipment; estimating, based on the received uplink reference signal, delay information regarding a delay profile of a communication channel between the user equipment and the network node and spatial information regarding the communication channel; applying both the delay information and the spatial information in precoding of at least one downlink reference signal; transmitting the at least one precoded downlink reference signal to the user equipment; and receiving, from the user equipment as a response to the transmission of the at least one precoded downlink reference signal, channel information, the channel information indicating at least non-zero coefficients of at least one channel transmission layer.

Systems and methods related to prioritization of non-zero coefficients for Channel State Information (CSI) for Coherent Joint Transmission (CJT) are disclosed. Embodiments of a UE and corresponding embodiments of a method performed by a UE for CJT CSI feedback in which non-zero coefficients of a precoding matrix indicator (PMI) feedback are prioritized are disclosed. Embodiment of a network node and corresponding embodiment of a method performed by a network node for CJT CSI feedback in which non-zero coefficients of a PMI feedback are prioritized are also disclosed.

The invention discloses a method and system for determining the reaction activity of material molecules based on quantum computing, and relates to the technical field of material performance analysis based on quantum computing, and the method comprises the following steps: generating a secondary quantization molecular Hamiltonian based on a target material molecular structure; traversing non-zero coefficient excitation terms in the molecular Hamiltonian, and screening an excitation operator conforming to the symmetry of a molecular point group as a target excitation operator; generating symmetric unitary coupling cluster single-double excitation simulation according to the target excitation operator; constructing a quantum circuit based on the configuration; and determining the reaction activity of the target material molecule by using the quantum circuit. According to the method, traditional manual symmetry analysis is avoided, professional knowledge is not needed, and the operation process is simplified. The method is systematized, easy to program and implement, high in universality and capable of being automatically expanded to any molecule, the design cost is remarkably reduced, and the molecular energy level solving efficiency is improved.

A method performed by a user equipment (UE) according to some embodiments includes receiving (502) an indication from a network node for a plurality of non-zero power (NZP) channel state information reference signal (CSI-RS) resources for channel measurement, and performing (504) channel measurement on the plurality of NZP CSI-RS resources. The UE selects (505) one or more NZP CSI-RS resources from the plurality of NZP CSI-RS resources, and generates (506) a CSI report based on the channel measurement and the selected one or more NZP CSI-RS resources. The CSI report includes indicators for the one or more selected NZP CSI-RS resources, and non-zero coefficient bitmaps corresponding to the one or more selected NZP CSI-RS resources. The UE transmits (508) the CSI report to the network.

A method for decoding a video includes determining, from multiple sets of multiple transform selection candidates, one set of multiple transform selection candidates based on at least one of a number of non-zero coefficients in a current block and a position of a last non-zero coefficient in the current block. The method for decoding the video also includes selecting one inverse transform method based on the one set of multiple transform selection candidates. The method for decoding the video further includes generating a residual block of the current block by performing the one inverse transform method on coefficients of the current block, where the multiple sets of multiple transform selection candidates have one or more candidates that correspond to a non-Discrete Cosine Transform 2 (non-DCT 2) inverse transform method.

A video decoder can be configured to determine a number of allowed non-zero coefficients for a block of video data based on a size of the block; obtain a set of dequantized coefficients for the block, wherein the set of dequantized coefficients comprises a first subset of dequantized coefficients that includes non-zero dequantized coefficients and a second subset of dequantized coefficients that includes all zero coefficients, wherein a number of coefficients in the first subset of dequantized coefficients is equal to the number of allowed non-zero coefficients for the block of video data; apply an inverse low-frequency non-separable transform (LFNST) to the first subset of dequantized coefficients to determine a first intermediate subset of coefficients; and apply an inverse separable transform to the first intermediate subset of coefficients and at least a portion of the second subset of coefficients to determine a block of reconstructed residual values.

Methods, systems, and apparatus for video processing are described. An example video processing method includes performing a conversion between a current video block and a bitstream of video according to a rule. During this conversion, an identity transformation mode is applied to the current video block, and the rule specifies that a zeroing operation is enabled, during which non-zero coefficients are restricted to sub-regions of the current video block.

The invention discloses a JPEG image batch steganography method and system based on experience security, and belongs to the technical field of information security. The method comprises the following steps: screening batch steganography carriers from a candidate JPEG image set based on experience security; calculating a non-zero DCT coefficient feature and a cost response curve D-alpha of each batch of steganography carriers; and calculating the optimal load rate of each batch of steganography carriers based on the non-zero DCT coefficient characteristics, the cost response curve D-alpha and the length of the load message, and executing steganography of the load message according to the optimal load rate. According to the method, the security of large-batch image steganography communication under an adaptive steganography algorithm can be improved.

A method for decoding a video includes determining, from multiple sets of multiple transform selection candidates, one set of multiple transform selection candidates based on at least one of a number of non-zero coefficients in a current block and a position of a last non-zero coefficient in the current block. The method for decoding the video also includes selecting one inverse transform method based on the one set of multiple transform selection candidates. The method for decoding the video further includes generating a residual block of the current block by performing the one inverse transform method on coefficients of the current block, where the multiple sets of multiple transform selection candidates have one or more candidates that correspond to a non-Discrete Cosine Transform 2 (non-DCT 2) inverse transform method.

An apparatus configured to process, based on a signal received from a base station, channel state information (CSI) configuration information for reporting CSI feedback based on a type II codebook in a CSI report, the CSI configuration information including a maximum number of non-zero coefficients (NZCs) in W2 to be included in the CSI report; processing a message including a CSI measurement resource based on a signal received from the base station; and generating type II codebook CSI feedback for transmission to the base station.

A method for indicating a coefficient is performed by a terminal. The method includes: receiving configuration information sent by a network device, wherein the configuration information is configured to configure codebook parameters of a plurality of Transmission Reception Point (TRP) groups, and each TRP group comprises at least one TRP; determining first indication information according to the configuration information, wherein the first indication information is configured to indicate a position of a non-zero coefficient among combination coefficients, the combination coefficients are coefficients determined by the terminal according to the codebook parameters of the plurality of TRP groups, and the combination coefficients are used by the network device to perform precoding calculation; and sending the first indication information to the network device.

A method for operating a user equipment (UE) comprises receiving configuration information about a channel state information (CSI) report, the configuration information including codebook parameters (M, α, β), wherein: M is a number of frequency domain basis vectors, α is a number≤1, and β is a number≤1; identifying values of M, α, and β; determining a value of K1 based on α, where K1 is a number of selected CSI reference signal (CSI-RS) ports from a total of P CSI-RS ports; determining a maximum number of non-zero coefficients based on β; determining the CSI report based on the values of M, K1, and the maximum number of non-zero coefficients; and transmitting the CSI report.

The invention discloses an encoder and a bit rate control circuit and a bit rate control method thereof, and belongs to the technical field of image encoders, and the encoder comprises a storage circuit, an encoding circuit and the bit rate control circuit. The storage circuit is used for storing a coding block, and the coding block comprises a plurality of pixel values. The coding circuit is used for coding the coding block according to a target quantization parameter so as to generate a bit rate. The bit rate control circuit comprises a frequency domain conversion circuit, a quantization circuit, a statistics and classification circuit and a selection circuit. The frequency domain conversion circuit is used for performing frequency domain conversion on the plurality of pixel values to generate frequency domain data. The quantization circuit is configured to perform a quantization operation on the frequency domain data based on a current quantization parameter to generate a quantized data. The statistics and classification circuit is used for classifying the coding block based on the distribution of non-zero coefficients in the quantized data so as to generate a category. The selection circuit is configured to change the current quantization parameter based on the category or output the current quantization parameter as the target quantization parameter.

This application discloses an encoding / decoding method, a bitstream, an encoder, a decoder, and a computer storage medium. The method includes: parsing the bitstream to determine the component identification information of the current slice and determining the coordinate information of the last non-zero coefficient of the current block corresponding to the component of the current slice; when the component identification information indicates that the component of the current slice is flipped using the position of the last non-zero coefficient, calculating the coordinate information of the last non-zero coefficient to obtain the position of the last non-zero coefficient of the current block; and decoding all coefficients before the position of the last non-zero coefficient according to a preset scanning order to determine the coefficients of the current block. This can improve compression efficiency in high-bit-width, high-bit-rate, high-quality, or lossless video encoding / decoding scenarios.

A coding method, a coder, a bitstream and a storage medium are provided. The decoding method comprises: parsing a bitstream, determining first information, the first information being used for indicating a position of a last non-zero coefficient of a current transform block; if the first information indicates that the last non-zero coefficient is located at a top-left corner of the current transform block, decoding a first parameter of the current transform block based on a first context model; wherein the first context model is different from a second context model, and the second context model is a context model used by a transform block decoded before the current transform block.

Certain aspects of the present disclosure provide techniques for a beam refinement procedure. According to certain aspects, a method for wireless communications by a user equipment (UE) generally includes generating CSI comprising non-zero coefficients according to a codebook parameter configuration and transmitting the CSI to a network entity.

A communication method comprises: determining K code words (S310), generating a first symbol according to the K code words and K cluster modulation data (S320), and transmitting the first symbol (S330). Wherein the K code words are in one-to-one correspondence with the K codebooks, the positions of non-zero coefficients contained in the K code words are related, the K code words are in one-to-one correspondence with the K cluster modulation data, and K is an integer greater than 1. According to the method, the peak-to-average ratio of the first symbol can be reduced, the transmission interference between users is reduced, and the demodulation performance is further improved.

The invention discloses a channel feedback information transmission method and device, and relates to the technical field of wireless communication. The method comprises the following steps: a second device receives a first signal from a first device; and the second equipment sends channel feedback information to the first equipment, the channel feedback information indicates quantization information of non-zero coefficients in a coefficient matrix and selection information of the non-zero coefficients, and the coefficient matrix is obtained according to a space domain base and a frequency domain base. The spatial domain base and the frequency domain base meet a first option, a second option or a third option; the first option is that the spatial base is all vectors in a spatial base matrix, and the frequency domain base is all vectors in a frequency domain base matrix; the second option is that the spatial base is a part of vectors in a spatial base matrix, and the frequency domain base is all vectors in a frequency domain base matrix; the third option is that the spatial base is all vectors in the spatial base matrix, and the frequency domain base is a part of vectors in the frequency domain base matrix.

For a transform block of a frame of a video encoded with conventional residual coding, if an inferred sub-block of a transform block of an sb codeflag is not present is a DC sub-block and / or the last one of transform blocks containing a non-zero coefficient level, the decoder inferes that the sb codeflag of that sub-block is 1. And otherwise, inferring that the sb coded flag is 0. If a transform block is encoded using transform skip residual encoding, the sb coded flag of a sub-block in which no sb coded flag exists is estimated to be 1. The decoder determines an initial context value of an entropy coding model based on the sub-block flag of the inferred sub-block, and determines a sub-block flag of the encoded sub-block using the entropy coding model.

Systems and methods related to prioritization of non-zero coefficients for Channel State Information (CSI) for Coherent Joint Transmission (CJT) are disclosed. Embodiments of a UE and corresponding embodiments of a method performed by a UE for CJT CSI feedback in which non-zero coefficients of a precoding matrix indicator (PMI) feedback are prioritized are disclosed. Embodiment of a network node and corresponding embodiment of a method performed by a network node for CJT CSI feedback in which non-zero coefficients of a PMI feedback are prioritized are also disclosed.

Systems, apparatuses, methods, and computer-readable media are described for coding transformed (e.g., RAHT) coefficients of a portion (e.g., a node) of a point cloud based on previously-coded coefficients in the same portion (e.g., node). The coefficients to be coded may be determined as zero or non-zero, for example, based on a context index determined from the previously-coded coefficients. Non-zero coefficients may be coded (e.g., encoded or decoded) for the portion of the point cloud. Local attribute coding may be achieved with improved efficiency and / or compression capability.

A video decoder can be configured to determine a number of allowed non-zero coefficients for a block of video data based on a size of the block; obtain a set of dequantized coefficients for the block, wherein the set of dequantized coefficients comprises a first subset of dequantized coefficients that includes non-zero dequantized coefficients and a second subset of dequantized coefficients that includes all zero coefficients, wherein a number of coefficients in the first subset of dequantized coefficients is equal to the number of allowed non-zero coefficients for the block of video data; apply an inverse low-frequency non-separable transform (LFNST) to the first subset of dequantized coefficients to determine a first intermediate subset of coefficients; and apply an inverse separable transform to the first intermediate subset of coefficients and at least a portion of the second subset of coefficients to determine a block of reconstructed residual values.

The embodiments of the present application disclose a rate-distortion optimization quantization method, system, device and storage medium for video coding. The technical solution provided by the embodiments of the present application calculates the optimal quantization coefficient of the current pixel point based on the first fixed value in the entropy coding bit estimation process of rate-distortion optimization quantization, represents the first bit consumption information required for encoding the current pixel point when the coefficient to be encoded is greater than 1 according to a set first fixed value; represents the second bit consumption information of the current pixel point marked as the last non-zero bit of the current transformation unit according to a set second fixed value, and calculates the rate-distortion cost of encoding the current pixel point as the last non-zero coefficient based on the second fixed value. By adopting the above technical means, the time consumption of rate-distortion optimization quantization can be shortened while ensuring the coding quality, the optimization of the rate-distortion optimization quantization process can be achieved, and the video coding efficiency can be improved.

A method for video coding includes determining whether any coding group of a transform block located within a second region has a non-zero coefficient. The transform block comprises a first region and the second region. Further, in accordance with a determination that no coding group of the transform block located within the second region has a non-zero coefficient, the method includes applying respective inverse transforms to transform coefficients of the transform block in horizontal and vertical directions.

This invention provides a method for improving coefficient coding / decoding throughput, coding / decoding speed, and compression efficiency in high-bit-depth, high-bit-rate, high-quality, or lossless video coding / decoding scenarios. [Solution] The method analyzes the bitstream to obtain video flag information. If the video flag information indicates that the video satisfies a predetermined condition, the bitstream is analyzed to obtain the position inversion flag information for the last non-zero coefficient and the coordinate information for the last non-zero coefficient. If the position inversion flag information for the last non-zero coefficient indicates that the position inversion of the last non-zero coefficient is to be used, the position of the last non-zero coefficient is determined by calculating the coordinate information for the last non-zero coefficient. According to a predetermined scan order, all coefficients prior to the position of the last non-zero coefficient are decoded to determine the coefficient of the current block.

Systems, apparatuses, methods, and computer-readable media are described for coding transformed (e.g., RAHT) coefficients of a portion (e.g., a node) of a point cloud based on previously-coded coefficients in the same portion (e.g., node). The coefficients to be coded may be determined as zero or non-zero, for example, based on a context index determined from the previously-coded coefficients. Non-zero coefficients may be coded (e.g., encoded or decoded) for the portion of the point cloud. Local attribute coding may be achieved with improved efficiency and / or compression capability.