40results about How to "Reduce codec complexity" patented technology

The invention relates to the information technology field of radio electronics and telecommunication technology, and relates to an aggregate of wireless enhancement technology of high-speed data transmission in the wireless communication field, in particular to an all-in-one feedback retransmission method based on fountain code mainly applied to wireless channel data transmission high-speed data service in a general mobile communication system. The method utilizes the ratioless channel coding principle of the fountain code, improves the existing mixed bit error feedback retransmission HARQ method and data coding mode in a wireless link, and mainly solves the relevant technical problems of how to utilize unique fountain code series to carry out the algorithm flow of coding and decoding foreach data block. The method has the beneficial effects that the feedback retransmission method and relevant fountain code design scheme can lead the data throughput of the wireless link to be improvedby 110% compared with the prior art, and the method has higher efficiency when the data blocks segmented in each group is more or the initial transmission groups sharing the same retransmission groupare more.

The embodiment of the invention relates to a coding and decoding method, a coder, a decoder and a coder / decoder system. The coding method comprises: obtaining a predicted value according to an original image or a reconstructed image; performing transform domain processing to the predicted value; performing quantization and inverse quantization to the predicted value after transform domain processing; obtaining a residual error according to the predicted value after inverse quantization and the original image transform domain parameter; obtaining coding data according to the residual error; performing quantization to the residual error; performing inverse quantization to the quantized residual error; obtaining a reconstruction value according to the predicted value and the residual error which both finish inverse quantization processing; and obtaining a reconstruction image after performing inverse transform domain processing to the reconstruction value. The embodiment of the inventionreduces distortion factor, improves R-D performance, improves coding and decoding efficiency and lowers coding and decoding complexity.

The embodiment of the invention discloses a method, a device and a system for processing an image residual block, relating to the technical field of video coding and decoding and capable of increasing the video compression coding performance and reducing the complexity in coding and decoding calculation. The method for processing the image residual block, provided by the embodiment of the invention, comprises the steps of: performing transformation coding on residual blocks of blocks to be coded by adopting a transformation base to obtain transformation coefficients of the residual blocks; determining a scanning sequence of the transformation coefficients of the residual blocks according to the transformation base and the grain direction information of the blocks to be coded; and scanningthe transformation coefficients of the residual blocks according to the scanning sequence to obtain the scanned transformation coefficients.

The invention relates to a method for establishing an SCMA codec model based on a noise reduction auto-encoder, and the method comprises the steps: building the SCMA encoder based on the noise reduction auto-encoder and a full-connection neural network, and enabling the original input data of a user to be mapped into a code word; superposing and transmitting the code words of all the users on eachresource block, and superposing channel noise on the signal on each resource block; establishing an SCMA decoder based on a full-connection neural network at a receiving end, and decoding original input data of all users; training an SCMA codec model based on a noise reduction auto-encoder; and testing the BER performance of the SCMA codec model based on the noise reduction auto-encoder. Comparedwith a traditional SCMA system, the method has the advantages that the encoding and decoding complexity is reduced; compared with an existing SCMA system model based on deep learning, the method hasthe advantages that the bit error rate is further reduced; compared with the existing SCMA system model based on deep learning, the SCMA system model based on deep learning has a faster training convergence speed.

The embodiment of the invention provides a point cloud geometrical information inter-frame encoding and decoding method. The method comprises the following steps: acquiring a frame point cloud in front of a current frame point cloud as a reference frame point cloud; making octree division on the current frame point cloud and the reference frame point cloud respectively, then dividing divided nodes, making iterative division until leaf nodes are ended to acquire a first octree structure of the current frame point cloud and a second octree structure of the reference frame point cloud; obtainingthe occupation condition of each reference node, and when the occupation condition of the reference node corresponding to the coding node is occupied, obtaining the occupation condition of a first neighbor node of the reference node; and determining a context model of a to-be-coded node placeholder code based on the placeholder condition, and performing entropy coding according to the context model to obtain a binary code stream. When the inter-frame prediction is occupied, the inter-frame context model is used for entropy coding, otherwise, the intra-frame context model is used for entropy coding, and motion compensation is not needed, so that the inter-frame coding and decoding complexity can be reduced, and the geometric entropy coding performance can be improved.

The invention discloses a joint channel security coding method based on a balance index and a polarization code. The method comprises the steps that after polarization code coding is carried out on all message sequences, the sequences are encoded into balance code words with the same number of 0 and 1; the balance index is used to carry out one-time pad sequence password encryption with small complexity on the balance code words; and private key encryption system encryption is carried out on the balance index based on the polarization code. The code words have dual functions of error correction and encryption, which can reduce the overhead of a system. In the design of the private key encryption system, the redundant information freeze bit of the polarized code is used as one private key which has the tasks of error correction and encryption; a randomly generated error vector ensures that the system is resistant to the existing exhaustive attack and selection plaintext attack; and the decoding complexity is reduced.

The invention discloses a hop-by-hop reliable transmission control method for an underwater wireless sensor network. Based on a digital fountain code technology irrelevant to a code rate, optimized degree distribution and recursive coding ideas are adopted, and an RLT (recursive LT) coding scheme is designed, so that rapid and efficient coding and decoding are realized; packet collision and end-to-end delay are reduced; and the network throughput is increased. Through collection of feedback information of a receiving node, the packet corruption probability of an underwater acoustic channel is accurately estimated, and the coding packet quantity of next transmission is further computed, so that the transmission overhead of extra packets is reduced. The fourth-layer reliable transmission mechanism and the second-layer medium access control mechanism of a conventional TCP / IP (Transmission Control Protocol / Internet Protocol) protocol stack are organically fused, so that block-by-block and hop-by-hop reliable transmission of the underwater wireless sensor network is realized on the basis of RLT coding, and transmission-reception conflicts, multi-transmission-single-reception conflicts and data-ACK conflicts caused by simplex communication of an underwater Modem are reduced. As an effective and practicable technical scheme, the method has a good application prospect.

The invention relates to a method and system for encoding a region of interest by limited variable bit rate control, which improves the picture quality of images of a motion region and a region of interest of human eyes at a limited bit rate, and achieves the purpose of saving the encoding bit rate by rejecting high-frequency coefficient information of much background images. Compared with ROI encoding by constant bit rate control (CBR) taking a traditional rate-distortion model as the basis, the limited variable bit rate control algorithm of the invention is matched with a quick block decision mechanism, has lower encoding and decoding complexity, and is more suitable for an instant monitoring coding system.

The invention provides a point cloud isolated point coding method and device and a point cloud isolated point decoding method and device. The method comprises the following steps of acquiring geometric information of ta o-be-coded point cloud; carrying out coordinate translation and coordinate quantification on the geometric position of the to-be-coded point cloud, so that the to-be-coded point cloud is contained in a bounding box; performing multi-way tree division on bounding box iteration based on the geometric position of the to-be-coded point cloud after coordinate quantification to obtain a current to-be-coded block of the layer after each division; for each current to-be-coded block, judging whether the current to-be-coded block meets a cut-off division condition or not based on thegeometric position of the point cloud point and the number of points; if the cut-off division condition is not met, continuing to execute the multi-way tree division; and encoding the point cloud point entropy in the current to-be-encoded block meeting the cut-off division condition into a binary code stream. According to the cut-off division condition provided by the invention, for the current to-be-coded block with repeated points, if the cut-off division condition is met, entropy coding is directly carried out without continuous division, so that the coding and decoding complexity is reduced.

An apparatus and method for SFBC coding and decoding in a communication system using a plurality of (Nt) Tx antennas are provided. In a transmitter using Nt transmit antennas, a pre-coder pre-codes an input symbol sequence using a pre-coding matrix. The pre-coding matrix is produced by puncturing a unitary matrix in a predetermined method. An encoder generates a plurality of vectors by grouping the symbols of the pre-coded symbol sequence by twos, space-frequency maps each of the vectors by encoding each of the vectors in an Alamouti coding scheme, and provides each of the space-frequency mapped symbols to a predetermined OFDM modulator.

The invention discloses a method for coding a syntactic element. The method can improve the compression coding efficiency of the syntactic element. The coding method comprises the following steps: inquiring a pre-configured coding data structure according to the code attribute value of current frame or fragmentation, and determining a method for representing the syntactic element for the current frame or fragmentation, wherein the coding data structure includes more than two coding attribute values, and identification information of the representation method related to each code attribute value; and coding the current frame or the fragmentation according to the determined representation method of the syntactic element. The coding device comprises a representation method determining unit of the syntactic element, and a coding unit of the syntactic element. According to the self-adaption coding method disclosed by the invention, the frame or the fragment is used as a basic unit, which means that the distribution of code words or the sequence of identifications in a predication mode can be dynamically adjusted according to each frame or each fragment in turn, therefore, the compression coding efficiency can be obviously improved, and the information redundancy can be reduced as well.

The embodiment of the invention discloses a coding method, which comprises: scaling a data frame according to the energy and coding bit number of the data frame; quantizing coded vectors in the scaleddata frame into closest RE8 grid points to acquire vectors to be coded; and coding the vectors to be coded by layer to acquire a coded code stream. The embodiment of the invention also discloses a decoding method, a coding device and a decoding device. The methods and the devices of the invention effectively reduce operation complexity and save storage space on the premise of ensuring coding anddecoding quality.

The embodiment of the invention provides a layered video encoding and decoding method, an encoding device and a decoding device. The method comprises steps: a relative image block of an enhancement layer image block is determined, wherein the relative image block comprises a base layer image block corresponding to the enhancement layer image block and an encoded image block near the enhancement layer image block; residual information corresponding to the relative image block is acquired; according to the residual information corresponding to the relative image block, whether generalized residual prediction algorithm is adopted when interframe prediction is carried out on the enhancement layer image block is determined, wherein the residual information corresponding to the relative image block is used for indicating whether the relative image block has residual or indicating the residual degree of the relative image block. According to the layered video encoding and decoding method, the encoding device and the decoding device, complexity of video encoding and decoding and the time of encoding and decoding can be reduced.

The invention relates to a hierarchical data coordination method based on polarization codes in a continuous variable quantum key distribution system. The specific steps of the method are as follows:S1, legitimate communication parties hold cross-correlated continuous variables, and hierarchically quantify the data of a sender (a receiver under reverse coordination) to obtain multi-level binary data; S2, a few levels containing less information in the multi-level binary data obtained in S1 are disclosed, polarization code inverse encoding is carried out on the undisclosed data, and the locations of sleep bits and corresponding data are disclosed; and S3, the receiver (the sender under reverse coordination) uses the disclosed binary data and sleep bit information to carry out polarizationcode decoding among multiple levels on the continuous variables held. The method has low encoding and decoding complexity and good error correction performance. By using the method, high coordinationefficiency can be achieved, and the security code rate of the continuous variable quantum key distribution system can be improved.

The invention discloses an image decoding method and device, and electronic equipment. The method comprises the steps of obtaining a to-be-coded original image; encoding the original image by using a preset encoding standard to obtain target encoding data, the preset encoding standard being based on intra-frame prediction encoding and including target block division processing and target quantization processing, the target block division processing being image block division processing based on a preset rule, the target quantization processing comprising data quantization processing based on grid coding quantization. According to the method, the complexity of image coding processing can be reduced on the premise of considering the image compression performance.

The invention provides an encoded video stream forwarding method. The method comprises the following steps: (1) receiving at least one path of original encoded video streams, and decoding the original encoded video streams in real time to obtain original image sequences; (2) receiving a request of one video stream of the video streams from a client; and (3) performing intra-frame encoding on the original image sequence corresponding to the video stream requested by the client, constructing a video stream header by using an intra-frame encoding image frame, transmitting the video stream header to the client, and forwarding an original encoded video stream corresponding to the video stream requested by the client to the client. The invention also provides a corresponding encoded video stream forwarding device and system. Through adoption of the method, the device and the system, the advantages of low complexity in encoding and decoding, small delay and small code rate of original large GOP (Group of Pictures) encoded video streams can be kept; the phenomenon of abnormal display during video stream switching can be restrained; and the user experience is improved remarkably.

The invention discloses a view map array division method which comprises the following steps: decomposing a light field image to acquire a view map array; and performing reference view map and rebuiltview map division on the view map array by using an ADP (Automatic Data Processing) or SMP (Symmetric Multi-Processing) algorithm to enable a proportion and a sparse degree of reference view maps inthe divided view map array to be both less than preset targets. The method can enable the proportion of the reference view maps to be lower and enable sampling to be sparser, thereby reducing the overall encoding and decoding complexity.

The invention discloses the structure and working principle of an information source channel joint codec and its codec parameter optimization design method based on vector quantization. The codec in the present invention is divided into encoder and decoder two parts, and encoder is by the input information source message vector buffer, encoding index generator, channel signal output unit, channel signal power and other encoding parameter memory, reconstruction information source Composed of message memory and coded channel signal memory; decoder consists of input channel signal vector buffer, decoding index generator, reconstructed source message output unit, decoded channel signal memory and reconstructed source message memory. The codec can directly encode a channel-optimized K-dimensional channel signal that strictly meets the requirement of average transmit power from L-dimensional source information, and realize source bandwidth compression or expansion. The codec has simple structure, low coding and decoding complexity, and strong versatility. The codec has excellent performance and has the characteristics of flexible degradation and flexible improvement, especially suitable for multi-user and time-varying channel applications.

The invention provides a video decoding method and device, a video coding method and device, equipment and a storage medium, which relate to the technical field of video coding and decoding. The method comprises the following steps of decoding a code stream to obtain a binary symbol string of string length information of a current string, performing reverse binarization processing on the binary symbol string according to the string length resolution of the current string to obtain string length information, and determining the string length of the current string according to the string length information. The length of the pixel string in the coding and decoding block can be limited to be the multiple of the string length resolution, the uniformity of the pixel string is improved, a coding and decoding end can carry out coding and decoding under the condition of memory alignment, and the coding and decoding efficiency of the pixel string is improved. Besides, in consideration of the influence of the string length resolution on string length information coding and decoding, a binarization and anti-binarization processing method for string length information is provided, the coding and decoding mode of the string length information under different string length resolutions is improved, and the coding and decoding performance can be improved.

The invention discloses a parallel reasoning method oriented to a neural network encoding and decoding tool, comprising: extending the boundary of an image to be processed to obtain an image with a complete boundary; dividing the image with a complete boundary into images of the same size according to a raster scanning sequence block; the image blocks of the same size are organized into several tensors, and the several tensors are simultaneously sent to the neural network as a group of tensors for forward propagation processing, wherein, according to the neural network coding tool and HW memory size sets the batch size value for said tensors. Through the above method, the video memory of the neural network inference can be effectively reduced, and the encoding and decoding complexity of the neural network video encoding tool can be reduced.

The invention discloses a high-speed serial communication method applicable to a low-cost child node. The method comprises steps as follows: a modulation mode of communication adopts voltage modulation, a modulation disturbance is superimposed on a power supply cable and is denoted with data '0', and no modulation disturbance is denoted with data '1', or a modulation disturbance is superimposed on the power supply cable and is denoted with data '1', and no modulation disturbance is denoted with data '0'; the modulation disturbance comprises two continuous fluctuations, and the two fluctuations have basically identical fluctuation shapes, but have opposite polarities; the initial phases of the modulation disturbance sent by a host and the modulation disturbance sent by a submachine are opposite. On the premise of no adding of any coding and decoding complexity, consumption of devices on a bus because of irrelevant data processing is avoided, and the system cost is substantially reduced.

Disclosed are a syntax element encoding and decoding method and device, which can improve the compression encoding efficiency of syntax elements. The encoding method comprises: querying a preconfigured encoding data structure according to an encoding attribute value of a current frame or fragment, determining a syntax element expression method for the current frame or fragment, and encoding the current frame or fragment according to the determined syntax element expression method. The encoding device comprises a syntax element expression method determining unit and an encoding unit. The decoding method comprises: obtaining, by parsing a code stream or by implicit derivation according to information of a decoded frame or fragment, identification information for distinguishing different expression methods; and querying, according to an encoding attribute value of a current frame or fragment, a preconfigured encoding data structure, calculating a syntax element expression method for the current frame or fragment, and decoding the current frame or fragment. The decoding device comprises a syntax element expression method determining unit and a decoding unit.

The invention provides a video processing method and device. The method comprises the following steps: determining a chrominance block to be coded or decoded; and taking the motion vector of one luminance block in the luminance blocks corresponding to the chrominance block as the motion vector of the chrominance block. By directly using the motion vector of one of the brightness blocks corresponding to the chrominance block as the motion vector of the chrominance block, the process of obtaining the motion vector of the chrominance block can be effectively simplified, so that the coding and decoding process of the chrominance block can be simplified, the coding and decoding complexity can be reduced, and the coding and decoding efficiency can be improved.

The embodiment of the invention discloses a coding method, which comprises: scaling a data frame according to the energy and coding bit number of the data frame; quantizing coded vectors in the scaleddata frame into closest RE8 grid points to acquire vectors to be coded; and coding the vectors to be coded by layer to acquire a coded code stream. The embodiment of the invention also discloses a decoding method, a coding device and a decoding device. The methods and the devices of the invention effectively reduce operation complexity and save storage space on the premise of ensuring coding anddecoding quality.

The invention relates to a high-efficiency non-I-frame image encoding and decoding method, which comprises the following steps of: detecting an original video sequence of a non-I-frame image at an image level by adopting a preset division rule, determining an image of an approximate static frame according to the preset division rule, and setting an identification bit of the image to be true, otherwise, setting an image identification bit to be false; writing the identification bit into a code stream; for the current frame image with the frame level identification being true, enabling each coding unit to directly adopt a preset new coding mode for coding, and writing coding information of the preset new coding mode into a code stream; and for a current frame image with a false frame level identifier, enabling each coding unit to still perform coding unit division and pre-coding on the image according to an originally set coding method, and writting division information and optimal coding mode information of each coding unit into a code stream. According to the invention, the coding and decoding complexity can be reduced, and the coding and decoding efficiency can be improved.

The invention relates to a layered data coordination method based on a polar code used in a continuous variable quantum key distribution system. The specific implementation steps of the method are as follows, step 1: both legal communication parties hold continuous variables with mutual correlation, and quantify the data of the sender (receiver under reverse coordination) hierarchically to obtain multi-level binary data; steps 2: Disclose the levels that contain less information in the multi-level binary data obtained in step 1, perform polar code inverse coding on the undisclosed data, and disclose the dormant bit positions and corresponding data; step 3: the receiver ( Under the reverse coordination (the sender) uses the public binary data and dormant bit information to perform multi-level inter-level decoding of the polar code on the held continuous variable. The encoding and decoding complexity of the method is low, and the error correction performance is good. The application of the method can obtain higher coordination efficiency, thereby improving the security code rate of the continuous variable quantum key distribution system.