54results about How to "Increase encoding rate" patented technology

Embodiments of the invention provide a data transmission method, a base station and a use device. The data transmission method comprises: the base station determines a code modulation level and the number of physical resource block pairs, selects a transmission big / small table from a first transmission block big / small table and a second transmission big / small table, and determines relative transmission block big / small TBS, to make the base station transmit data to UE based on the selected TBS in the second transmission block big / small table, thereby enhace coding rate.

An embodiment of the invention provides a data transmission method, a base station, and a user device. The data transmission method comprises determining an encoding modulation grade and a time frequency resource by the base station, determining a TBS index and modulation mode in a first or second modulation and transmission block size index table, wherein the second TBS index is not smaller than the first TBS index, sending business data and a system scheduling control signal to a user device by use of a selected TBS so as to make the base station select a larger TBS to reach a higher coding rate, and improve the throughput capacity of the system.

The present invention relates to a multi-antenna transmit diversity method in wireless communication and discloses a multi-antenna transmit diversity method and apparatus of the orthogonal frequency division multiplexing (OFDM) system to realize the multi-antenna transmit diversity and obtain frequency diversity grain of a coding speed of 1 and to improve the transmitting reliability. In the present invention, before the orthogonal frequency division multiplexing modulation the frequency domain signal is multiplied with different phase sequence, then the signals are performed diversity transmitting through the orthogonal frequency division multiplexing modulation to each antenna to realize the frequency diversity gain and obtain a high coding speed; wherein, the phase sequence can be determined at random and can also be designed as required, thus, the frequency punching effect can be avoided effectively and the channel transmit reliability is improved; in addition, the phase sequence can realize the self-adapting adjustment according to the transmit quality evaluation and feedback of the receiving end and the system robustness is improved; the free setting of the phase sequence improves the flexibility of the multi-antenna transmit diversity system greatly.

Disclosed is a video monitoring method based on an H.264 coding technology. In the method, a circuit structure of a video monitoring server includes a data acquiring circuit, a data coding circuit and a data transmission circuit; and a circuit structure of a monitoring client includes a data receiving circuit and a data decoding / displaying circuit. Output / input ends of the above-mentioned circuits are connected sequentially in an end-to-tail way. The above-mentioned circuits all adopt multi-thread input / output control. The data coding circuit and the data decoding / displaying circuit all adopt an H.264 coding / decoding mechanism. The video monitoring method has the characteristics of fluent and highly real-time videos; different threads are adopted in data acquiring and coding so that data acquiring and coding can be carried out simultaneously; and at the same time, queues with buffers are adopted so that video acquiring rate and coding rate are greatly improved. Therefore, fluency and real-time performance of the videos are ensured. At the same time, a multi-thread framework is also adopted by the monitoring client so that data receiving and data decoding can be carried out simultaneously. Therefore, real-time performance of the system is further improved.

The embodiment of the invention discloses a subframe structure and a method and a device for transmitting physical mixed retransmission indication continuous time, relating to the technical field of communication and aiming to solve the problem that one or two unused states waste null source in a control format indication in the prior art. The subframe structure provided by the embodiment of the invention comprises the control format indication for representing the state of a physical downlink control channel, and further representing the physical mixed retransmission indication continuous time. The method for transmitting the physical mixed retransmission indication continuous time provided by the embodiment of the invention comprises the following steps: obtaining the control format indication with the physical mixed retransmission indication continuous time; and transmitting the control format indication through a physical control format indication channel. Through using the invention, the free control format indication state can be used so as to reduce the cost of physical broadcast channel and signal to further save null sources.

The embodiment of the invention provides a motion estimation method and device in video encoding, electronic equipment and a storage medium. The method comprises the following steps: acquiring video frame information of the current to-be-encoded block; obtaining a candidate motion vector set according to the video frame information; determining an initial motion vector from the candidate motion vector set based on a rate distortion criterion; taking a location pointed by the initial motion vector as a starting point, performing integer vector search based on the starting point in the preset search range, thereby obtaining the optimal motion vector after the integer pixel search is accomplished; taking a location pointed by the optimal motion vector as a center point, and performing sub-pixel point search on a direct upper direction, a direct lower direction, a direct left direction and a direct right direction; determining an optimal encoding cost based on the center point and the searched sub-pixel points; and determining an optimal matching point of the current to-be-encoded block after the motion estimation according to the pixel point corresponding to the optimal encoding cost.The video encoding efficiency can be improved through the method provided by the invention.

The embodiment of the invention relates to a dynamic regulation method and system for a Bluetooth audio. The method comprises the steps of: acquiring a current application scene, and configuring encoder parameters according to an acquired result; monitoring real-time communication quality, and if monitoring that the communication quality becomes poor, executing a strategy for avoiding sound jamming; and after executing the strategy, if monitoring that the communication quality is improved and when an improvement quantity of the communication quality reaches a preset threshold, starting up an internal timer, and according to timing of the internal timer, regulating an audio encoding rate and a radio frequency transmission power. According to the technical scheme provided by the invention, tone quality of the Bluetooth audio can be promoted, time delay can be reduced, connection stability can be reinforced and use time can be prolonged.

The invention provides an image parallel coding method and an image parallel coding system. The image parallel coding method comprises the steps of dividing a to-be-coded image into a plurality of coding areas, wherein each coding area corresponds to a coding unit line in an image coder, and each coding unit line comprises a plurality of coding units; and starting the plurality of coding unit lines to carry parallel coding on the plurality of coding areas in sequence according to a preset starting relationship. Through application of the technical scheme of the invention, the relatively high compression efficiency can be ensured, the image coding speed can be effectively improved, and the user experience can be improved.

The invention discloses an acousto-optic hybrid underwater communication method and system based on a remote optical fiber, and a storage medium. Tight coupling function integration is carried out onan optical fiber communication module and an acoustic wave communication module, high-speed, networked and long-distance data transmission is realized through the optical fiber communication module, and flexible communication with an underwater maneuvering platform within an attenuation radius range is realized by utilizing the acoustic wave communication module arranged at a submarine optical cable communication network node. According to the system, the transmission distance of acoustic wave communication is increased through an optical fiber, the coverage range of optical fiber communication is expanded through acoustic waves, an optical-acoustic communication link is flexibly switched through multiple physical field signals, the system can adapt to various underwater depths, and an important reference is provided for constructing a deep sea underwater communication network with a long transmission distance and a wide coverage range.

The invention provides an AVS2 video coding and decoding standard optimization scheme. The AVS2 video coding and decoding standard optimization scheme judges whether a rate distortion optimization quantization process is carried out in advance by utilizing the relation between scalar quantization and rate distortion optimization quantization, and directly judges that all quantization results are 0if the process is not needed, that is, a judgment condition for quantizing a coefficient block to be all 0 is added in advance, so that the quantization process time can be shortened, and the video compression rate can be increased. By setting the database used for storing the two quantization results, the scheme for directly replacing previously similar quantized coefficient blocks, which need to be quantized currently, of DCT coefficient blocks in database, can avoid repeated calculation, can improve the coding efficiency on the premise that the compression rate and the video quality are guaranteed, and can save the coding time. By adding the threshold condition for ending the search in advance in the motion estimation, the AVS2 video coding and decoding standard optimization scheme canimprove the coding rate under the condition that the video quality loss cost is relatively low.

The invention provides a video coding method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring video data to be coded; obtaining the division depth of each coding unit in the coding frame according to the coding sequence of each coding frame in the video data; for the currently read first coding unit, determining a reference division depth of the first coding unit according to the division depth of the second coding unit; when the division depth of the first coding unit is smaller than the reference division depth, determining a target division mode in a first division mode, the first division mode comprising quadtree division and non-division; and encoding the first encoding unit according to the target division mode. Therefore, under the condition that the division depth of the current coding unit is smaller than the reference division depth, the coding unit can be divided by selecting a division mode with less video loss fromthe two division modes of quadtree division and non-division. Therefore, the calculation amount in the encoding process can be reduced, and the encoding time is saved.

The invention discloses an audio matching tracking device based on dictionary classification, which comprises a signal decomposing unit and a signal reconstructing unit, wherein the signal decomposing unit comprises a dictionary building module, a signal classification module, a weight comparison module, a residual calculation module and a threshold control module; and the signal reconstructing unit comprises a reconstruction coefficient extraction module and a signal synthesis module. The invention also discloses a tracking method for the tracking device. through classifying the signals, different sparse dictionaries are adopted for different types of signals for MP algorithm, the irrelevant traversal times are reduced, and the calculation complexity is reduced; during a classification pre-processing process, an adapted sparse dictionary is judged through calculating the energy distribution interval of original signals; and the method reduces the dimension of the needed dictionary, the coding rate is improved, and the use effects are good.

The invention discloses an SHVC (scalable high efficiency video coding) enhancement layer video coding method based on rapid prediction mode selection, mainly solving the problem of low code rate of an enhancement layer in SHVC standards. The SHVC enhancement layer video coding method includes: (1), determining a correlation between a basic layer and the enhancement layer, and acquiring a prediction mode probability statistical table by probability statistics; (2), selecting a rough candidate prediction mode of the enhancement layer according to the probability statistical table; (3) respectively coding previous n frames of a video sequence by means of the rough candidate prediction mode and the Yin method to acquire a rate-distortion performance estimator BD-PSNR; (4), adjusting the rough candidate prediction mode according to the rate-distortion performance estimator BD-PSNR to acquire a final candidate prediction mode; (5), coding the video sequence according to the final candidate prediction mode. The SHVC enhancement layer video coding method has the advantages that on the premise of guaranteeing video rate-distortion performance, coding difficulty is effectively lowered and coding time is reduced; the SHVC enhancement layer video coding method can be applied to real-time video application.

The invention relates to a data packet processing method for a two-way relay system, which comprises that: a first node and a second node code own information required to be transmitted to each other respectively, and synchronously transmit the coded information to a relay node in form of data frame; the relay node receives a composite signal data frame; the relay node processes the contents of the composite signal data frame bit by bit, and further performs comprehensive processing according to coding redundancy to obtain an intermediate signal data frame; the intermediate node transmits theintermediate signal data frame; and the first and second nodes receive the intermediate signal data frame respectively, and subtract corresponding data frames transmitted per se from the intermediatesignal data frame to obtain data frames transmitted from the opposite nodes. The invention also relates to a data packet processing device for the two-way relay system. The data packet processing method and the data packet processing device for the two-way relay system have the advantages of no requirement on complete decoding on the relay node, relatively higher coding rate and great reduction in error rate.

The invention belongs to the technical field of information fault-tolerance, and provides a grouped fault-tolerant entropy coding method. The method comprises the steps of: first, dividing a frame in a video sequence into macro blocks which are equal in size, and compressing the macro blocks to obtain data blocks which are unequal in length as source data of grouped fault-tolerant entropy coding; then, obtaining a length conversion sequence according to a length conversion algorithm, and dividing the source data into different groups to obtain grouped information of each data block; and finally, coding the grouped information of each data block. By dividing the blocks which are different in length into groups which are equal in total length and coding the groups according to a one-frame-to-one-frame sequence, the coding process is optimized, and the coding rate at a coding end is accelerated. The storage requirement increase is less, and the decoding complexity is reduced, so that the robustness is effectively improved. The grouped fault-tolerant entropy coding method has stronger popularization and application values.

The invention relates to the technical field of video coding, and relates to a video coding method and system based on terminal equipment parameters. The method comprises the steps of obtaining firstvideo stream data and second video stream data of a first display device; secondly, extracting a current terminal device parameter of the first display device and extracting pixel distribution information of the first display device from the current terminal device parameter when the current terminal device parameter represents that the first display device has the encoding and decoding defect identifier; and then determining video encoding and decoding defect distribution of the second display device and encoding the video stream data displayed by the second display device to ensure that thesecond display device normally displays the video. Different audio and video coding parameter information can be sent according to different terminal display devices, different audio and video streamsare sent to different types of terminals, it is ensured that different terminal devices can achieve the purpose of smooth audio and video playing on the premise of different parameters, and the audioand video communication quality is improved.

The embodiment of the invention discloses a coding mode determination method and device, equipment and a storage medium, and the method comprises the steps: dividing a coding unit under each coding specification into conversion units under a next coding specification adjacent to the coding specification, and calculating the coding cost of each conversion unit; and sequentially performing cost optimization integration on the coding unit and the conversion unit under the same coding specification to obtain an overall coding mode under the optimal coding cost. According to the technical scheme provided by the embodiment of the invention, the coding cost can be minimized when the overall coding mode is adopted for video coding, the adaptability of the video coding modes adopted under differentvideos is ensured, the calculation overhead of video coding is reduced, and the video coding rate is further improved.

A transmission method includes receiving analog signal from shooting head by image collection component and carrying out A / D conversion, using hardware to carry out JPEG 2000 format coding for converted image to obtain JPEG format image code data generated by image coding component from control processing unit, packing the data according to TCP / IP protocol and retransmitting the packed data to Ethernet through standard Ethernet interface.

The invention discloses a video coding method and device, computer equipment and a storage medium, and belongs to the technical field of audios and videos. According to the invention, the current macro block to be coded is the static macro block and the reference video frame is the forward reference P frame, and the coding mode of the static macro block is directly determined as the target codingmode based on the fact that the quality parameter of the static macro block is greater than or equal to the quality parameter of the reference macro block and the motion vector meets the target condition; prediction judgment on other coding modes is skipped, rate-distortion cost does not need to be calculated in an intra-frame mode and an inter-frame mode one by one, and the coding rate can be greatly increased under the condition that coding efficiency is not lost.

Embodiments of the present invention provide a data transmission method, a base station, and user equipment. The data transmission method includes: the base station determines the coding and modulation level and the number of physical resource block pairs, and selects from the first transmission block size table and the second transmission block size table A transport block size table to determine the corresponding transport block size TBS, so that the base station can increase the encoding rate when transmitting service data to the UE according to the TBS in the selected second transport block size table.

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 discloses an LDPC encoding method and an LDPC encoder, and the method comprises the steps: 1), obtaining an I-row J-column b-order cyclic matrix Bi, j from a generation matrix G, i beinggreater than or equal to 1 and less than or equal to I, and j being greater than or equal to 1 and less than or equal to J; step 2) dividing the coded information bit vector u into I sections of information bit vectors A1,..., AI of which the lengths are b bits, performing zero supplement processing on each information bit vector A1,..., AI, and expanding the information bit vectors A1,..., AI into E1,..., EI; 3) according to the coding parallelism degree M, segmenting Ei into M equal-length sub-vectors; 4) segmenting a cyclic matrix Bi, j into M sub-cyclic matrixes; 5) calculating Cj as a check bit vector segment of which the length is b; and finally, obtaining a check bit vector C = (C1, C2,..., CJ). The LDPC encoding method provided by the invention has the advantages of low complexity, configurable encoding parallelism and high encoding rate, and has higher application value in a satellite high-speed data transmission system with harsh requirements on resources, power consumptionand encoding rate.

The embodiment of the present invention provides a coding and modulation method supporting a robust channel RC, comprising: forming a data frame with bit data carried by a DMT symbol at the interface of the PMD and the PMS-TC; The interface of PMS-TC determines the first part of bit data including the RC bit data in the data frame as non-coded bit data, and encodes the second part of bit data in the data frame to obtain coded bits Data; in the PMD, the non-coded bit data and the coded bit data are mapped to multiple subcarriers corresponding to the data frame for modulation to obtain modulated subcarriers, and the RC bit data is mapped to the at least one on the RC subcarrier. The invention also provides an encoding and modulating device supporting RC channel. By adopting the invention, the encoding and decoding rate of the data frame can be improved, and the security of information transmission can be guaranteed.

The application discloses a video encoding method, device, computer equipment and storage medium, belonging to the technical field of audio and video. In this application, the current macroblock to be encoded is a static macroblock and the reference video frame is a forward reference P frame, based on the quality parameter of the static macroblock being greater than or equal to the quality parameter of the reference macroblock and the motion vector meeting the target condition, the static The coding mode of the macroblock is determined as the target coding mode, skipping the prediction and judgment of other coding modes, and there is no need to calculate the rate-distortion cost of intra-frame mode and inter-frame mode one by one, which can greatly improve the coding rate without losing coding efficiency .

The invention discloses a method and a related device for determining the coding cost of a coding unit. The method includes: determining a coding unit for predictive coding in an intra-frame prediction mode; and determining pixel gradient information corresponding to the coding unit, where the pixel gradient information includes pixel gradient variance , the pixel gradient variance is the variance of the image gradient of at least some pixels in the coding unit; the coding unit is divided and pre-judged according to the pixel gradient information; Determined as the second coding cost of the coding unit, the second coding cost is used to determine the division strategy of the coding tree unit corresponding to the coding unit, and the first coding cost is to use the current size of the coding unit as the size of the prediction unit to predict the coding unit The encoding cost obtained by encoding. In the technical scheme of the present invention, by ending the division of coding units in advance, the amount of calculation can be reduced, the coding complexity can be reduced, and the coding rate can be improved.

The invention discloses a dynamic control method of channel coding gain. The method comprises the steps of setting multiple optional channel coding rates corresponding to various numbers of code channels occupied by a user in advance; setting an accelerating threshold and a deceleration threshold for each optional channel coding rate under the corresponding code channel number; monitoring a target SIR (Signal Interference Ratio) of the user while the channel coding gain control is carried out; if the target SIR of the access user is always lower than the accelerating threshold of the current channel coding rate within a certain time, keeping the number of the occupied code channels invariable and increasing the channel coding rate so as to reduce the coding gain, increase the code resource utilization rate and provide a larger user bandwidth as much as possible under the precondition of assuring that the access user number is invariable; and if the target SIR of the access user is always higher than the decelerating threshold of the current channel coding rate within a certain time, keeping the number of the occupied code channels invariable and reducing the channel coding rate so as to assure the receiving performance of the user data.

The invention provides a construction method of partially polarized polar code, which belongs to communication technology field. The method cancels regularly unneeded polarization operation in polarization process of traditional polar code and deletes 1 that needn't participate in polarization operation in the original polarization matrix, which cancels polarization operation caused by raw information Bit in coding procedure. The generated polarization matrix after deleting 1 regularly is provided. On the one hand, partially polarized polar code generated by the method can improve error-correcting performance of finite length polar codes, and simplify polarization operation structure of polar code and reduce code-decode complexity of polar code; on the other hand, the polar code still can be proved to reach the channel capacity at infinity. A simulation result shows that the polar code has better BER performance than the traditional polar code.