244results about How to "Occupies less bandwidth" patented technology

The present invention relates to a data group transmission art, in particular to a sending and receiving device which can prevent the data lose in the transmission process. The present invention can solve the art problems that the receiving end can not recover the data when the data bag is lost. The present invention is characterized in that the sending end will group the prior data bag order crossingly and form the redundancy bag for each group; the receiving end will order the prior data bag again, if the prior data bag is lost the redundancy bag will recover the data bag in the group of the prior data bag. The present invention has a simple method and has a good resistance effect against continuous bag losing, and the present invention enhances the experience of the customer.

The invention discloses a intelligent video monitor search method, including the steps: collecting the video frame, extracting the moving target information flow, storing the corresponding moving target information flow of the video frame; searching the stored moving target information flow, judging the detected object whether matching with the defined affair rule, if so, determining the corresponding occurrence of the affair rule. Furthermore, the invention includes the step of inquiring the stored affair and the step of playing back the corresponding video frame based on the affair selection. The invention discloses an intelligent video monitor affair search system for executing the method. Due to the target information data flow smaller than the video data flow, hence the invention has faster searching speed, higher searching effectiveness, higher data transmission, lower cost compared with the prior scheme.

The invention provides a certificate verification method, a system and a certificate verification terminal, aiming at solving the problem in the traditional checking system which checks the verification of certificates by manually inputting the certificate number and has the disadvantages of wasting time and energy and having high error rate. The method comprises the following steps of: obtainingan area image containing a certificate number; carrying out character segmentation to the area image, thus obtaining images of all the characters; utilizing a classifier obtained by training in advance to carry out identification to the images of all the characters, thus obtaining the certificate number information; and sending the certificate number information to a server side for verification and then receiving the returned checking result. The invention can identify certificate numbers automatically and does not need to input certificate numbers manually, thus greatly raising the efficiency of certificate checking; besides, the identification processing of certificate numbers is carried out in a system terminal, thus occupying little bandwidth and reducing the demand for the performance of network and server terminals.

The invention discloses a method for synchronizing wide area data between data centers based on a cache. The method is characterized by comprising the following steps of: (1) initializing synchronous systems, namely filling data frequently accessed by the systems into a memory according to the configuration by a server of a local data center, communicating with each remote data center required to be synchronized, comparing the difference of the data, and then performing synchronization; (2) performing read-write access on the data, namely directly reading and writing the cache in the memory through an interface, and writing the data in the memory into a hard disk by one or more independent threads in a service program of a background; and (3) performing remote synchronization on the data, namely periodically and directly synchronizing the contents called and modified by the interface from the memory to a remote data center, and executing the same interface calling by the remote data center to complete data synchronization. The method has the advantages of high synchronizing efficiency, small occupied bandwidth, high reliability, good transplantability and simple deployment, and solves the problem of inconsistency of other abnormities when the systems run.

The invention discloses a continue phase-extended binary phase shift keying (CP-EBPSK) communication system for pseudorandom sequence phase modulation and a communication method thereof. On the basis of a CP-EBPSK modulation mode, the CP-EBPSK communication system comprises a CP-EBPSK modulator of pseudorandom sequence phase modulation and a CP-EBPSK demodulator of pseudorandom sequence phase modulation. According to the CP-EBPSK modulator of pseudorandom sequence phase modulation, a pseudorandom sequence generator is added to an original CP-EBPSK modulator and the pseudo random number generated by the pseudorandom sequence generator is utilized to randomly select a symbol of the delta. And the CP-EBPSK demodulator of pseudorandom sequence phase modulation includes an impulse filter that is used for highlighting phase modulation information of a received signal and eliminating the polarity changes, so that the demodulation performance is not influenced by pseudorandom sequence modulation. According to the invention, advantages of narrow bandwidth occupied by the modulation signal, low interference, simple realization, wide code rate adaptive range and flexible application.

The invention discloses a deep learning-based crowd density detection method and system. The detection method comprises the following steps: firstly, obtaining background image information through background learning, and then extracting a target foreground image of each frame image through the background image information; establishing a low-density crowd model through an image from which the target foreground image is extracted and belonging to the low-density crowd level, and establishing a high-density crowd model through the image from which the target foreground image is extracted and belonging to the high-density crowd level; first inputting each frame image needing to detect the crowd density to the low-density crowd model, judging the crowd density level according to the crowd number when the low-density crowd model acquires that the crowd number result does not exceed a certain value; inputting the image into the high-density crowd model when the low-density crowd model acquires that the crowd number result exceeds a certain value, and judging the crowd density through the high-density crowd model. The detection method disclosed by the invention has the advantages of being high in detection precision and small in amount of calculation.

The invention discloses a self-service investigation system and an investigation method, consisting of a plurality of investigation terminals and an investigation central server. The investigation central server publishes a questionnaire to a designated investigation terminal which provides a convenient self-service operation interface by which a user can participate in; and after the investigation, the investigation terminal automatically provides rewards for participation of investigation and transmits the investigation result to the self-service investigation central server. By applying the invention, an investigator can publish questionnaires to each designated investigation terminal conveniently and instantaneously and obtain the investigation result in time; respondents can freely participate in the questionnaire survey at the investigation terminals and obtain the rewards of participation in time; and only in the case of data communication, the system needs to be connected with the network, thereby occupying lower bandwidth and having lower network fees. Therefore, the invention solves the problems that the questionnaire can not be issued automatically and efficiently, the investigation result can not be updated in real time, users can not finish the investigation by themselves, and the investigation rewards can not be automatically provided in time.

The embodiment of the invention provides a data transmission method for having access to a cellular mobile network system and associated equipment. Only necessary data are transmitted between a cloud server and the terminal equipment, and resources of a communication network are saved. The method includes the steps that the cloud server receives access place information sent by the terminal equipment; according to the access place information, SIM cards or USIM cards are distributed, and associated data of the cards are acquired; the associated data are processed, and a data set is acquired; historical login place information of the terminal equipment is acquired, the access place information and the historical login place information are compared, whether the terminal equipment has access to a service provider network of an access place before or not is judged, if yes, the first kind of data are transmitted to the terminal equipment, and if not, the first kind of data and the second kind of data in the data set are transmitted to the terminal equipment. The embodiment of the invention further provides the cloud server. The embodiment of the invention further provides the terminal equipment.

A information modulating and demodulating method used on digital communication includes realizing modulation by utilizing binary information code element to directly vary abrupt phase of sine carrier wave, utilizing lock phase ring to realize demodulation, making modulated signal g0(t) corresponding to number zero be sine wave of N carrier wave period and making g1(t) corresponding to number one be in sine wave of N carrier wave period with frequency of fc, applying phase jump off angle theta and parameter tau as modulation index for varying signal bandwidth and transmission code rate as well as demodulation property.

The invention discloses a processing method of hyper text transport protocol (HTTP) request data. The processing method includes step: (1) a client side reads received request data before transmitting the request data to a server; (2) whether the capacity of the request data is larger than or equal to or smaller than a preset value N is judged; (3) the request data are compressed and marked if the capacity of the request data is larger than or equal to the preset value N, and the request data are not compressed if the capacity of the request data is smaller than the preset value N; (4) the request data are transmitted to the server through a HTTP communication protocol; (5) the server analyzes the received request data and judges whether the request data have data compression identification; and (6) the request data are subjected to uncompressing if the request data have data compression identification. The processing method effectively saves time of the client side for transmitting the request data to the server and enables data to occupy small bandwidth.

The invention discloses an underground electromagnetic-wave ultrasound united positioning system and method for a coal mine. The system comprises a ground monitoring terminal on the ground, an underground central station, a plurality of gateway nodes, an optical fiber, a bus, a plurality of anchor nodes, a plurality of mobile nodes and an upper terminal arranged at a far end, wherein the underground equipment is intrinsic safety equipment. The method is a united positioning method, wherein electromagnetic waves are matched with ultrasonic waves; according to the space structure of a roadway and the properties and characteristics of the electromagnetic waves and the ultrasonic waves, the mobile nodes capable of simultaneously emitting two wireless signals of the electromagnetic waves and the ultrasonic waves are adopted; according to a logarithm-normal model, the electromagnetic waves are utilized to measure the distance between the mobile nodes and anchor nodes; and according to the TOF (time of flight) distance measurement principle, the ultrasonic waves are utilized to measure the distances between the mobile nodes and the wall of the roadway and the distances between the mobile nodes and the bottom surface of the roadway. Therefore, a simple algorithm is utilized to directly obtain the position coordinates of the mobile nodes so as to realize the accurate positioning. The underground electromagnetic-wave ultrasound united positioning system and method are high in positioning accuracy, low in cost and less in energy consumption; and the structures of the system equipment are simple.

The invention discloses a method for supervising traffic flow and an apparatus thereof. The method comprises the following steps: configuring a user token bucket for each user to be supervised and performing single-flow supervision on the user token bucket, configuring a general token bucket for all users to be supervised, wherein, token addition rate of the configured general token bucket is associated with sum of the token addition rates of all the user token buckets; when the token addition rate of the configured general token bucket equals the sum of the token addition rates of all the user token buckets, after messages of the users to be supervised are obtained, if number of tokens in the user token bucket of the user and/or number of tokens in the general token bucket is more than orequal to number of the arrived messages, forwarding the arrived messages, or discarding the messages. The method and the apparatus can help make full use of bandwidth resources or fairly distribute the bandwidth resources on the premise of giving necessary restriction on the bandwidth resources of the users.

The invention discloses an extended binary phase shift keying modulation and demodulation method for frequency spectrum compression, which is an information modulation method used for digital communication. The method uses a binary information code element to directly change a continuous phase of a sinusoidal carrier to realize modulation, and uses a type of special simple-zero multi-pole narrowband digital filters with quite close resonance frequencies to realize demodulation so that a modulated signal f0(t) corresponding to the number '0' is sine wave of N carrier cycles, while a f1(t) corresponding to the number '1' is in the sine wave of N carrier cycles with an angular frequency of omega, and the phases and carrier frequencies of front K cycles synchronize and change continuously according to the sine rule. The method directly controls the continuous changed magnitude of the phases of the sinusoidal carrier and the time duty ratio thereof by using data bits, namely the method can change the signal bandwidth, transmission code rate and transmission performance respectively or simultaneously, and can realize high-speed data transmission of extremely narrow bandwidth.

The invention provides a distributed network television live broadcast method, a device, a video gateway and a system. The method comprises the steps that the resource information and channel identifier collection of M video gateways is acquired; a broadcast request which carries the configuration information of a broadcast terminal and a broadcast command for a target channel identifier and is sent by the broadcast terminal is received; the broadcast request is responded; according to the resource information, a video gateway is selected from M video gateways and is used as a target video gateway which provides a video content transmission service for the broadcast terminal; and a video content pushing request which carries the configuration information of the broadcast terminal is pushed to the target video gateway, so that the target video gateway pushes a video content to the broadcast terminal. According to the technical scheme of the invention, the operation cost of a network live broadcast television system is reduced.

The present invention provides a method of secure communication for a wireless mobile terminal. In the invention, the wireless mobile communication user realizes secure information exchange of terminal to terminal based on the guarantee reliability identity authentication without bearing deployment, maintenance and complex operation of public key infrastructure, without the participation of telecom operator, without replacing or impacting telecom signaling exchange protocol. The mobile communication user uses mobile terminal identity mark as identity, introducing a credible thirst party, named for key generation center, the main function is to help user to generate key according to the identity of user. The user acquires a key corresponding to the identity from the credible third party by mobile phone message or data service. The key guarantees the encryption key exchange and safety parameter between users to negotiate and resist active attack, session key between mobile users is independent to the KGC random generation, realizing the safety communication of terminal to terminal.

The invention discloses a mobile video monitoring and high-precision positioning command and dispatching system for a railway. The system comprises a mobile terminal, a wireless communication network and a background processing service center; the mobile terminal comprises a GPS unit, a recording unit, a data processing unit, a compressed encoding unit and a voice broadcasting unit. A collected video stream is pushed to a background server in real time via a handheld terminal integrated with a high-precision GPS chip based on a currently most popular RTMP live broadcasting protocol, meanwhile a current location is positioned by the high-precision GPS chip, a GPS coordinate is uploaded to the server, a command center can open a video in live broadcasting at any time via a management website for watching, and meanwhile, field personnel can be commanded and scheduled by voice or characters; the background server also has a function of storing the live video in real time, and command staffs can also check any video at any time after live broadcasting and meanwhile can check a moving trail of rail operation personnel within a period.

The embodiment of the invention provides a memory access processing method and a controller. The method includes the following steps: a counter is adopted to count the time between two neighboring accesses of each line of a dynamic random memory (DRAM) to acquire a timing result T1; and if the time T1 corresponding to one line of the DRAM is greater than the refresh cycle T2 of the DRAM, then the line is accessed and processed to be refreshed. In the embodiment of the invention, the time between two neighboring accesses of each line is counted, refresh operation does not need to be carried out anymore if the line is accessed in the refresh cycle, so that the frequency of refresh is decreased, and thereby the bandwidth occupied by cyclic refresh is saved; for a line which is not accessed in the refresh cycle, a one-time access mode is adopted to substitute for refresh, special refresh operation does not need to be taken into consideration, and thereby the design is simpler.

The invention discloses a distance-constraint-based electromagnetic and ultrasound wave combined positioning system and method for coal-mine downholes. In the system, according to the spatial structure of a laneway and the attribute characteristics of electromagnetic and ultrasonic waves, a simplified formula for the ratio of the distances from a mobile node to two anchor nodes is obtained through an electromagnetic wave propagation logarithmic-normal model formula by using appropriate approximation algorithms. As the distance between the two anchor nodes is a known quantity, the longitudinal coordinate of the mobile node in the laneway is obtained by taking the distance as a constraint condition. According to the ranging principle of TOF (Time of Flight), the distance from the mobile node to the wall of the laneway is obtained through ranging by using the ultrasonic waves, the horizontal coordinate of the mobile node in the laneway is obtained, and then the two-dimensional position coordinates of the mobile node are obtained, so that the accurate positioning is realized. The method disclosed by the invention has the advantages of high positioning accuracy, low cost and little energy consumption. The system disclosed by the invention has the advantage of simple equipment structure.

The invention discloses a voice signal transmitting and receiving device and method. In the device, a coder is used for coding current acquired to-be-transmitted voice signals; a processor is used for classifying the voice signals and/or signals obtained after coding by the coder, and is used for executing corresponding packet loss prevention treatment for the classified voice signals; and a transmitter is used for transmitting the voice signals processed by the coder and the voice signals processed by the processor. According to the technical scheme provided by the invention, the code rate of the voice code stream as well as the occupied bandwidth are lowered, at the same time, the pocket loss prevention ability of the voice signals is maintained, and the user experience is not affected.

The invention discloses a transformer substation smoke and fire intelligent identification monitoring method based on deep learning. Improvement and optimization of a video recognition model and an image recognition model are carried out on an actual scene of a transformer substation; two improved model frameworks are fused; the disadvantages of the two improved model frameworks are avoided as much as possible, and respective advantages of the two improved model frameworks are developed, a reasonable and flexible detection method is designed, an image recognition model is used for monitoring at ordinary times, after smoke is detected, a video recognition model is automatically called for secondary rechecking, an alarm signal is sent to a monitoring platform after checking is accurate, anddetection and early warning work can be effectively completed.

The embodiment of the invention provides a picture uploading method and device, and relates to the technical field of picture processing. The method comprises the following steps: receiving a picture uploading instruction; judging whether the size of a picture exceeds a first threshold; if the size of the picture exceeds the first threshold, enabling a picture editing mode, and loading the to-be-uploaded picture; editing the to-be-uploaded picture; compressing the edited picture after the editing operation is accomplished; and uploading the compressed picture. By adoption of the picture uploading method and device provided by the invention, in an uploading process, the picture is firstly edited and then is compressed so as to reduce the size of the picture, thereby having the beneficial effects of reducing the flow consumption and reducing the network bandwidth occupation.

The invention relates to a video preview method and device, and the method comprises the steps: obtaining a preview request sent by terminal equipment, and enabling the preview request to comprise a video identifier of a to-be-previewed video; determining a preview image according to the video identifier, wherein the preview image comprises an image formed by splicing frame images in the to-be-previewed video intercepted according to a first time interval; and sending the determined preview image to the terminal device. According to the video preview method provided by the embodiment of the invention, after the server sends the preview image to the terminal equipment, the terminal equipment can realize video preview by playing the frame image on the preview image, so that the preview process is smoother.

The invention relates to a method and device for synchronously playing files at multiple terminals. The method comprises the following steps: uploading a file to be played to a server and generating an information code corresponding to a file address so that a second terminal can open a webpage corresponding to the file address through scanning the information code; and in the process of playing the file, obtaining the current played page and sending to the server so that the second terminal can enable the file played in the webpage to skip to a corresponding page according to the played page stored in the server. Through the method and device, the users can conveniently participate in the multi-terminal synchronous playing, the synchronous waiting time is short and the occupied bandwidth is less.