50 results about "Coding gain" patented technology

The invention relates to the field of adaptive noise reduction, in particular to an adaptive noise reduction method and system for a multi-mode audio SoC main control chip. The method comprises the following steps: acquiring an original audio input signal according to an SoC main control chip, performing time-frequency domain dual deconstruction and cross-frequency domain noise interference structure analysis, and constructing a full-frequency domain noise interference topology table; carrying out multi-mode interference factor separation on the full-frequency-domain noise interference topology table, carrying out multi-noise environment modeling, and constructing a real-time noise scene model; time sequence noise slope fluctuation modeling is carried out on the real-time noise scene model, dynamic noise reduction response learning optimization is carried out, and a dynamic noise reduction optimization strategy is constructed; and performing neural coding gain and audio boundary line reconstruction according to the original audio input signal to obtain a coding gain key audio signal and a weak audio optimization signal. According to the invention, by flexibly adjusting the noise reduction intensity of the audio signal, the real-time scene noise reduction performance is optimized.

A VVC-standard encoder and a VVC-standard decoder are provided, implementing a decoder-side chroma intra prediction mode gradient-based derivation method, which improves coding efficiency of chroma intra prediction, thereby saving on signaling cost. A VVC-standard decoder configures one or more processors of a computing system to derive one of multiple possible chroma intra prediction modes by computing gradients of adjacent luma samples and chroma samples of a current chroma block. With minimal increase in signaling cost, the VVC-standard coding and decoding processes are enhanced to base intra prediction modes for chroma blocks on collocated luma block-adjacent reconstructed luma samples adjacent reconstructed chroma samples, enabling prior computational work done on coding and decoding adjacent blocks to be referenced. In this fashion, coding gains can be achieved in matching texture characteristics of the current chroma block based on a texture gradient including adjacent blocks.

The invention discloses a self-adaptive modulation method and device for a power line carrier communication system, which belongs to the technical field of power line carrier communication, and comprises the following steps of: acquiring channel information of the power line carrier communication system, including a transmission characteristic value of each sub-channel and the total transmitting power of the system, and calculating the signal-to-noise ratio of each sub-channel; according to the signal-to-noise ratio of each sub-channel and the total transmission power of the system, calculating the power value allocated to each sub-channel, adjusting the original power peak-to-average ratio of the sub-channel, determining the adjusted power peak-to-average ratio, and calculating the adjusted coding gain through an optimization coefficient related to the system characteristics in combination with the adjusted power peak-to-average ratio and the original coding gain; according to the method, the performance and the reliability of the power line carrier communication system are improved by reasonably distributing the sub-channel power, controlling the peak-to-average power ratio, optimizing the error control coding gain and intelligently switching the working mode.

The application relates to the technical field of decoding, and provides a source channel joint decoding method and device, electronic equipment and a storage medium, the method comprising the following steps: acquiring initialization information of a channel encoder and prior probability information of a variable node of a source decoder; determining check node information of the source decoder based on the initialization information and the prior probability information; and performing the following iterative steps, which comprise the following steps: updating soft information of the variable node of the source decoder based on the check node information and the initialization information; and performing decoding decision based on the updated soft information to determine a decoding result. The method determines the check node information of the source decoder based on the initialization information and the prior probability information, iteratively updates the soft information of the variable node of the source decoder based on the check node information and the initialization information, that is, uses the information of the source as the soft information available in the decoding process, improves the coding gain, and thus improves the accuracy of the source channel joint decoding.

This application belongs to the field of channel coding technology. This application provides a WSC-assisted encoding and decoding method for PC-Polar codes. The embodiments disclosed herein can be used in any communication system employing PC-Polar codes with minimal impact on the overall design of the communication system. By assisting in the verification of multiple candidate paths, the correct path can be identified more accurately, resulting in additional coding gain compared to PC-Polar codes in simulations. The PC-Polar code is endowed with link-layer frame error detection and indication functions, allowing the system to definitively determine whether the decoding result is correct, thus enhancing the reliability of the communication system. The introduced WSC coding has low code rate loss overhead, low computational complexity, and is easy to implement in hardware, achieving a good balance between performance gain and overhead.

The embodiment of the invention relates to an uplink data sending method, equipment, a device and a medium, uplink authorization information carries information of a plurality of different RVs and uplink control information, so that terminal equipment generates data streams of a plurality of PUSCHs corresponding to the plurality of different RVs based on the information of the plurality of different RVs and the uplink control information, and sends the data streams of the plurality of PUSCHs corresponding to the plurality of different RVs to the terminal equipment. And the data streams of the plurality of PUSCHs are simultaneously sent to one or more target network devices through the plurality of transmitting panels, so that the transmission delay of blind retransmission can be reduced, the transmission efficiency can be improved, and the coding gain can be obtained.

Interaction of transform size and coding tools. The invention provides a method and apparatus for implementing a discrete triangular transform based on a maximum transform size. In one embodiment, matrix-based intra prediction is enabled for coding unit sizes up to a certain size, regardless of the maximum transform size. In another embodiment, a low frequency non-separable transform is used to improve coding gain. Syntax in the bitstream can be used to indicate the coding tools used.

This invention provides a method and apparatus for implementing discrete trigonometric transformations based on the maximum transform size. In one embodiment, matrix-based intra-frame prediction is enabled for coding unit sizes up to a specific size, regardless of the maximum transform size. In another embodiment, low-frequency inseparable transforms are used to improve coding gain. The syntax in the bitstream can be used to indicate the coding tools used.

This invention discloses a precoding gain estimation method, device, storage medium, computer product, and system. It includes: an EDU determining a compressed channel matrix and a large-scale fading coefficient matrix; a UCDU determining an estimated value of the precoding gain based on the large-scale fading coefficient matrix; the UCDU processing and fusing the estimated values ​​of the compressed channel matrix and precoding gain using a residual-aware fusion neural network, outputting an estimated value of the residual between the precise value of the precoding gain and the estimated value of the precoding gain; and the UCDU determining the final precoding gain based on the estimated value of the precoding gain and the estimated value of the residual. This method uses a residual-aware fusion neural network that has learned the residual between the precise value of the precoding gain and the estimated value of the precoding gain to output an estimated value of the residual, thereby determining the final precoding gain, which can improve the computational efficiency of the precoding gain.

The invention relates to a short code length QC-LDPC (Quasi-Cyclic Low-Density Parity-Check) code construction method based on a Stanley sequence and a genetic algorithm. According to the method, a Stanley sequence is used for forming first two rows of an index matrix meeting the condition that no four rings exist, then a genetic algorithm is used for searching a third row element which enables the index matrix to meet the requirements that the ring length is at least 8 and the number of trap sets is small, and therefore the index matrix with the girth length being at least 8 is obtained, the genetic algorithm can guarantee that the number of the trap sets is minimum, and the number of trap sets is small. And finally, the index matrix is expanded to obtain a parity check matrix of the index matrix, so that four rings and six rings do not exist in a Tanner graph of the check matrix, the number of trap sets is small, the storage space required by code words is small, and hardware implementation is easy. Simulation shows that compared with an HS-QC-LDPC code, an MT-QC-LDPC code and an SES-QC-LDPC code which have the same code rate and code length, the SS-QC-LDPC code constructed by the method has the advantages that the net coding gain is improved to a certain extent, and the constructed SS-QC-LDPC code has better waterfall region performance in a high signal-to-noise ratio region and has no obvious error leveling phenomenon.

The invention relates to the technical field of decoding, and provides a source-channel joint decoding method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining the initialization information of a channel encoder, and the prior probability information of a variable node of a source decoder; determining check node information of the information source decoder based on initialization information and the prior probability information; executing the following iteration steps: updating the soft information of the variable node of the information source decoder based on the check node information and the initialization information; and based on the updated soft information, performing decoding judgment to determine a decoding result. According to the method, check node information of a source decoder is determined based on initialization information and prior probability information, soft information of variable nodes of the source decoder is iteratively updated based on the check node information and the initialization information, that is, the information of a source is used as available soft information in the decoding process, the coding gain is improved, and the decoding efficiency is improved. Therefore, the accuracy of source-channel joint decoding is improved.

The application provides a layered beam training method and device based on channel coding, which encodes an L-bit binary sequence of indexes (0 to N T -1) of N T angle directions into an M-bit binary sequence by using an encoder; constructs a beam set by using N T M-bit binary sequences; generates a wide-beam layered codebook corresponding to the beam set based on a narrow-beam codebook; and performs layered beam training on each user by using the wide-beam layered codebook and a decoder to select an optimal beamforming code word of each user in the narrow-beam codebook. The layered beam training problem is modeled as a channel coding and decoding problem, so that the reliability of the layered beam training is improved by using the coding gain of the channel coding to improve the data transmission reliability and reduce the bit error rate; and the low pilot overhead of the layered beam training is ensured by using the advantages of the layered beam training.

This invention discloses a source-channel joint coding scheme for short packet communication. The scheme includes: at the transmitting end, firstly, performing two-stage classified enumerative (CE) coding on the message sequence u to be transmitted to obtain a variable-length description sequence (w). u i u ), where w u Indicates the type of the message, i u This indicates the order of message u within this type class; subsequently, the variable-length sequence (w) will be... u i u After multi-rate matching channel coding, a fixed-length transmit codeword c is obtained. During modulation, transmission energy is allocated according to the channel code rate, with low-rate transmit codewords receiving low transmission energy. At the receiving end, type-specific test decoding is used to recover the transmitted message. For a given type, the corresponding channel code decoding is performed first, followed by CE decoding, ultimately yielding an estimate of the message sequence. This invention has a significant coding gain compared to existing schemes, and its performance can approach the source-channel joint coding bound under finite length conditions.

The invention discloses an image high dynamic range reconstruction method and system based on a detail coding gain graph, and belongs to the technical field of computer vision and image processing. The method comprises the following steps: S1, data preprocessing: acquiring an input single standard dynamic range image, and preprocessing the image to obtain image data in a linear space or normalized floating point tensor format; s2, proposing a detail recovery network design based on detail generation of a diffusion model; s3, predicting a detail coding gain graph, and providing a gain convolutional neural network design; and S4, final HDR synthesis: carrying out pixel-by-pixel multiplication on the processed standard dynamic range (SDR) image and the three-channel (R, G, B) gain image according to channels to obtain a reconstructed HDR image. According to the method, the problems of detail recovery missing, image structure distortion, low calculation efficiency and the like in the existing single image HDR (High Dynamic Range) reconstruction technology are effectively solved.

The embodiment of the invention provides a motion vector prediction (MVP) candidate determination method, a storage medium and an electronic device, and the method comprises the steps: obtaining an MVP candidate list, and enabling the candidate MVP types in the MVP candidate list to comprise a space-domain motion vector candidate MVP, a time-domain motion vector candidate MVP, a historical motion vector prediction (HMVP) candidate MVP, and a motion vector angle prediction (MVAP) candidate MVP; and determining a basic candidate MVP according to the MVP candidate list. The problem that the coding gain is low due to the fact that the optimal basic candidate MVP cannot be selected in the prior art is solved, and the effects of efficiently selecting the optimal basic candidate MVP and improving the coding gain are achieved.

The application discloses a shortened LDPC decoding method and system with high coding gain, and the method comprises the following steps: initializing channel reception log-likelihood ratio information and extrinsic information transmitted from check nodes to variable nodes; taking the initialized channel reception log-likelihood ratio information and the extrinsic information transmitted from the check nodes to the variable nodes as first iteration input, performing iteration decoding calculation to obtain a code word decision result; and outputting the code word decision result as a decoding result. The application improves the accuracy of decoding and the convergence speed of decoding.

The invention discloses a data encoding method, a data decoding method, a data encoding device, data decoding equipment, and a storage medium, and belongs to the technical field of communication. The method comprises the steps of obtaining a first data segment; a plurality of basic code blocks are obtained, the basic code blocks are composed of a first code block set and a second code block set, and the minimum code block distance between any basic code block in the first code block set and other code blocks in the basic code blocks is larger than the minimum Euclidean distance of PAM, the minimum code block distance between any basic code block in the second code block set and other code blocks in the multiple basic code blocks is equal to the minimum Euclidean distance, and the number of the basic code blocks in the first code block set is larger than that of the basic code blocks in the second code block set; and encoding the first data segment according to the plurality of basic code blocks. As the code block distance between any basic code block in the first code block set and other code blocks is greater than the minimum Euclidean distance, the basic code blocks in the first code block set are used for coding, and additional coding gain can be generated.

The invention discloses an interference elimination method and device for a digital information chain and electronic equipment. The method comprises the following steps: performing channel estimation and equalization processing on a received first signal to obtain a second signal; demodulating the second signal to obtain demodulation soft information of the second signal; decoding the demodulation soft information to obtain decoding soft information, determining a candidate signal sequence according to the decoding soft information, and verifying the candidate signal sequence; under the condition that the candidate signal sequence passes the verification, determining the candidate signal sequence as a decoding result of the first signal; and under the condition that the candidate signal sequence does not pass the verification, obtaining the updated candidate signal sequence again according to the decoding soft information and the first signal until the updated candidate signal sequence passes the verification. According to the invention, the technical problem that data transmission cannot be carried out in a complex environment due to insufficient data link coding gain and anti-interference capability in related technologies is solved.

Methods and apparatus for implementing Discrete Trigonometric transforms are based on maximum transform size. In one embodiment, matrix-based intra prediction is enabled for coding unit sizes up to a specified size, regardless of the maximum transform size. In another embodiment, low-frequency non-separable transforms are used to improve coding gain. Syntax in a bitstream can be used to indicate a coding tool that is used.

The invention relates to the technical field of information security, and particularly provides a steganography method and device, equipment, a medium and a product. According to the steganography method and device, target signals of carrier audio are searched based on a plurality of fixed codebook vector combinations, steganography parameters to be determined are obtained, and the target signals are random noise excitation obtained through self-encoding gain and noise processing; based on the to-be-determined steganography parameter and a first mapping relation, determining a steganography bit stream, the first mapping relation being used for representing a mapping relation between a level state of the to-be-steganography target secret information and a steganography parameter range; the steganography bit stream is a signal carrying target secret information; determining steganographic audio based on the steganographic bit stream; and sending the steganography audio to a receiving device. The value of a steganography parameter is limited at a sending end, and the steganography parameter is used as an intermediate variable in a coding process, so that embedding of secret information is realized. Therefore, the security of audio steganography can be improved.

Provided in the present application are a communication method and communication apparatus based on a PC code, in which PC coding and CRC coding are mainly used to implement the precoding of information bit sequences transmitted in a broadcast channel, an uplink data channel and a downlink data channel, or information bit sequences carried in control information, followed by channel coding, so that the coding gain of channel coding can be improved, thereby facilitating an improvement in the communication quality. In addition, the method can improve the error correction performance when the number of payloads increases, and can also achieve a further improvement in the coding gain when a mother code length increases.

The present disclosure provides a communication method, apparatus, device, storage medium, and program product, which relate to communication technology and include: determining a transmission block size based on the time-frequency resources occupied by a multi-slot physical uplink shared channel (PUSCH), where the time-frequency resources occupied by the multi-slot PUSCH include time-frequency resources in multiple time slots; obtaining a transmission block corresponding to the transmission block size, encoding the transmission block to obtain a coding block, and transmitting the coding block via the multi-slot PUSCH. In this embodiment, the transmission block size can be increased, thereby allowing more data to be transmitted through a single encoding, improving coding gain, and thereby enhancing coverage performance.

Provided in the present application are a communication method and apparatus. In the method, on the basis of performing convolution on some bit sequences among bit sequences to be sent, that is, on the basis of a coding framework of partial convolution of MPAC, CRC coding is introduced at a coding end, such that code weight distribution better than that of an MPAC code can be obtained, i.e. a greater coding gain can be obtained, and by means of a CRC code, the MPAC code can also be assisted in checking an output decoding path in a decoding stage, thus improving a path error detection capability, and thereby improving an error correction capability in the decoding stage, and improving the decoding performance.

The invention provides an OFDM (Orthogonal Frequency Division Multiplexing) waveform design method suitable for covered wire transmission, which comprises the steps of CRC (Cyclic Redundancy Check) check, Turbo coding / rate matching, serial-to-parallel conversion, constellation mapping, OFDM modulation and framing, and utilizes a mode of combining an OFDM transmission technology with high spectrum utilization rate with 16QAM (Quadrature Amplitude Modulation) and 4QAM modulation technologies with high information transmission rate. Compared with a traditional single-carrier frequency domain equalization technology and a PAM constellation mapping mode of covered line transmission, the frequency spectrum utilization rate and the data transmission rate are improved; meanwhile, compared with the traditional grid coding, the Turbo coding further improves the coding gain; the insertion of the CP-UW pilot signals can reduce the difficulty of subsequent receiving end signal processing and improve the channel estimation precision, so that distortion and attenuation signals introduced by covered wire long-distance transmission can be recovered more accurately, large-bandwidth and long-distance communication in a covered wire communication environment is realized, and audio and video transmission services can be supported.

The application claims a reliability parameter assisted low complexity polar code rate matching method, belonging to the technical field of wireless communication. In view of the problem that the recursive structure of polar code makes it difficult to select suitable puncturing bits during rate matching, a polar code puncturing bit selection algorithm based on reliability parameters is proposed. Based on the analysis of the decoding process of polar code and the influence of the box operation on the selected puncturing bits, a kind of information bit reliability parameter is defined to calculate the reliability of the candidate puncturing bits. The optimal puncturing bits are selected by solving the maximum reliability parameter minimum value through iteration. In view of the problem that the existing polar code rate matching method has high complexity, an interleaving algorithm based on rate matching parameter mapping and a pruning serial cancellation list decoding algorithm are proposed, which avoids the secondary sorting calculation of the interleaver and simplifies the updating strategy of the calculation unit of the decoder. The proposed polar code rate matching method can not only improve the rate matching coding gain, but also effectively reduce the calculation complexity.

This invention belongs to the field of optical fiber testing and sensing technology, specifically relating to a method for identifying faults and disturbances in few-mode optical fibers using Raman-enhanced time-domain reflectometry (TDDR). The method includes: signal transmission based on pulse coding and mode-selective excitation; signal-to-noise ratio enhancement based on distributed Raman amplification; mode demultiplexing and mode field detection; coded demodulation and reconstruction using a multi-mode few-mode optical TDDR; multi-dimensional fault identification based on mode-dependent loss and coupling characteristics; and multi-mode differential and high-precision positioning based on digital signal processing. This invention targets high-capacity communication and distributed sensing systems using few-mode fibers. It solves the problem of detecting weak inter-mode scattering signals by coordinating pulse coding gain and distributed Raman optical gain. Subsequently, it utilizes the unique mode-dependent loss and inter-mode energy transfer characteristics of few-mode fibers for joint decision-making, providing highly sensitive, multi-dimensional optical fiber link health monitoring capabilities. This method has great potential and application prospects in the operation and maintenance of next-generation space-multiplexed optical networks.

Methods and apparatus for implementing Discrete Trigonometric transforms are based on maximum transform size. In one embodiment, matrix-based intra prediction is enabled for coding unit sizes up to a specified size, regardless of the maximum transform size. In another embodiment, low-frequency non-separable transforms are used to improve coding gain. Syntax in a bitstream can be used to indicate a coding tool that is used.

A method of transmitting information symbols over an OTFS communication channel subject to frequency-selective fading comprises precoding information symbols to be transmitted, yielding precoded information symbols, and arranging the precoded information symbols into the two-dimensional delay-Doppler domain, yielding a symbol matrix in the delay-Doppler domain. The symbol matrix in the delay-Doppler domain is then converted into an OTFS time-domain signal for transmission over the OTFS communication channel. The precoding comprises multiplying the information symbols to be transmitted with a precoding matrix having a trace that equals the product of the numbers or dimensions of the OTFS delay and Doppler resource grids, and whose elements are targeted to maximise a coding gain and / or a diversity gain on the OTFS communication channel.

The methods and devices for implementing discrete trigonometric transformations are based on the maximum transformation size. In one approach, matrix-based intraprediction is permitted for encoding unit sizes up to a specified size, regardless of the maximum transformation size. In another approach, low-frequency, non-separable transforms are used to improve the encoding gain. Syntax can be used on a bitstream to indicate the encoding tool being used.