80 results about "Nonzero coefficients" patented technology

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.

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.

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.

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.

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.

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.

A method for video processing includes determining, based on a first indication, whether a sub-block residual coding scheme is applied to residual of a current video block in a transform skip mode, the sub-block residual coding scheme splitting the residual of the current video block into multiple sub-blocks and a subset of the multiple sub-blocks have non-zero coefficients; determining, based on a second indication, a specific split pattern to be applied to the residual of the current video block, in response to the sub-block residual coding scheme being applied to the residual of the current video block; deriving, based on a third indication, the subset of the multiple sub-blocks which have non-zero coefficients; and performing a conversion on the residue of the current video block based on the determined subset of sub-blocks having non-zero coefficients.

For a transform block of a frame of video encoded with regular residual coding, a decoder infers the sb coded flags of a sub-block of the transform block that is not present to be 1 if the inferred sub-block is a DC sub-block and / or the last sub-block in the transform block that contains a non-zero coefficient level. Otherwise, the sb coded flag is inferred to be 0. If the transform block is encoded with transform skip residual coding, the sb coded flag of a sub-block that is not present is inferred to be 1. The decoder determines an initial context value for the sub-block flags of an inferred sub-block based on the sub-block flags of the sub-block and uses the entropy coding model to determine the sub-block flags of the encoded sub-block.

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, methods, and devices for wireless communication are described. A method of wireless communication includes receiving, by a wireless device, configuration signaling. The method also includes determining, by the wireless device, a precoding matrix indicator (PMI), where the PMI is based on a codebook indicated by the configuration signaling and the PMI corresponds to a precoding matrix applicable to more than 32 antenna ports of a network device. The method also includes transmitting, by the wireless device, the PMI. In some embodiments, the method includes configuration of oversampling factors, configuration of codebook subset restriction, selection of a spatial domain (SD) / frequency domain (FD) basis, non-zero coefficient indication, and non-zero coefficient quantization.

The invention discloses a channel measurement method, a terminal and a base station. The channel measurement method executed at the terminal comprises the following steps: receiving configuration information for channel measurement, wherein the configuration information comprises the number of indicated spatial domain and frequency domain feature basis vectors; receiving a reference signal for channel measurement; measuring a channel according to the reference signal, and determining channel state information based on the number of indicated spatial domain and frequency domain feature basis vectors; and reporting channel state information (CSI) to the base station, the CSI comprising a precoding matrix indicator (PMI), and the PMI comprising the non-zero coefficients reported by the terminal and the number of the non-zero coefficients corresponding to at least one layer and / or at least one polarization direction. The invention can reduce the overhead reported by the terminal.

The embodiment of the application discloses a coefficient coding and decoding method, an encoder, a decoder and a computer storage medium, and the method comprises the following steps: analyzing a code stream, and obtaining video identification information; when the video identification information indicates that the video satisfies a preset condition, analyzing the code stream, and obtaining last non-zero coefficient position flip identification information and last non-zero coefficient coordinate information; when the last non-zero coefficient position flip identification information indicates that the last non-zero coefficient position flip is used, calculating the last non-zero coefficient coordinate information, and determining the position of the last non-zero coefficient; and decoding all coefficients before the position of the last non-zero coefficient in a preset scanning order, and determining the coefficients of a current block. In this way, in the video coding and decoding scene of high bit width, high code rate, high quality or lossless, not only the throughput and coding and decoding speed of coefficient coding are improved, but also the compression efficiency is improved.

The present disclosure relates to a quantization method and device in video coding, electronic equipment and storage medium, and relates to the technical field of video coding. The present disclosure is used to reduce the calculation amount of RDOQ, improve the coding efficiency, and avoid waste of computing resources. The method comprises: obtaining an initial transform unit of a video to be encoded, performing transform processing on the initial transform unit to obtain a target transform unit; the initial transform unit comprises a plurality of initial transform coefficients; the target transform unit comprises a plurality of target transform coefficients; the redundancy of the frequency domain information reflected by the plurality of target transform coefficients is less than the redundancy of the frequency domain information reflected by the plurality of initial transform coefficients; determining the number of non-zero coefficients in the plurality of target transform coefficients, and in the case that the number of non-zero coefficients is less than a preset threshold, determining the quantization value of each target transform coefficient in the target transform unit as a preset quantization value, and skipping the rate-distortion optimization quantization processing on each target transform coefficient in the target transform unit.

The embodiment of the invention discloses a coding and decoding method, a code stream, a coder, a decoder and a computer storage medium, and the method comprises the steps: analyzing the code stream, determining the component identification information of a current piece, and determining the coordinate information of the last non-zero coefficient of a current block corresponding to the component of the current piece; when the component identification information indicates that the component of the current block is overturned by 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 sequence, and determining the coefficient of the current block. Therefore, the compression efficiency can be improved in a high bit width, high bit rate, high quality or lossless video coding and decoding scene.

Apparatuses and methods for channel state information (CSI) codebook. A method for operating a user equipment (UE) includes receiving a configuration about a CSI report. The configuration includes information about N>1 groups of CSI reference signal (CSI-RS) ports and a codebook. The codebook includes a spatial-domain (SD) basis component, a frequency-domain (FD) basis component, and a coefficient component. The SD basis component includes Lr basis vectors for each group r=1, . . . , N. The FD basis component includes Mv basis vectors. The coefficient component includes coefficients associated with (SD, FD) basis vector pairs. The method further includes, based on the configuration, measuring the N groups of CSI-RS ports and determining the SD basis component, the FD basis component, and the coefficient component such that K1 coefficients are non-zero and remaining coefficients are zero, whereK1≤∑ r=1N⁢( 2⁢Lr⁢Mv).The method further includes transmitting the CSI report including an indicator indicating locations of non-zero coefficients.

The present disclosure relates to a video encoding method, device, electronic equipment and storage medium. The method comprises: obtaining an encoding block in a video image frame, determining at least one quantization coefficient block in the encoding block; mapping the parity of the number of non-zero coefficients in the quantization coefficient block as the transform kernel index of the encoding block to obtain the current transform kernel index; the transform kernel index is used to represent the selection state of the coefficient transform kernel for the encoding block; the coefficient transform kernel is used for low-frequency non-separable second transform of the coefficients in the encoding block; in the case that the current transform kernel index is different from the actual transform kernel index of the encoding block, the number of non-zero coefficients in the quantization coefficient block is adjusted to obtain the adjusted quantization coefficient block; the parity of the number of non-zero coefficients in the adjusted quantization coefficient block is used to represent the actual transform kernel index; and based on the adjusted quantization coefficient block, the video encoding of the video to which the video image frame belongs is generated. The present disclosure can save the code rate of video encoding and improve the video encoding efficiency.