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 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 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 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 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.

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.

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 invention discloses an FSE coding method and device, equipment and a storage medium, and the method comprises the steps: obtaining a to-be-coded symbol sequence corresponding to to-be-coded data, and determining a to-be-coded symbol of which the symbol state does not depend on other symbol states from the to-be-coded symbol sequence, so as to obtain a target to-be-coded symbol; splitting the to-be-coded symbol sequence based on the position of the target to-be-coded symbol in the to-be-coded symbol sequence to obtain a plurality of to-be-coded subsequences corresponding to the to-be-coded symbol sequence; and separately coding the plurality of sub-sequences to be coded to obtain the coded data to be coded. According to the method, the symbol with the unique state is taken as the splitting point to split the to-be-coded symbol sequence to obtain the plurality of subsequences, and compared with the mode that the whole to-be-coded symbol sequence is subjected to serial coding and splitting to realize parallel coding of the subsequences, the coding rate is improved.

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.