83results about How to "Reduce transmission bandwidth requirements" patented technology

An auditory scene is synthesized from a mono audio signal by modifying, for each critical band, an auditory scene parameter (e.g., an inter-aural level difference (ILD) and/or an inter-aural time difference (ITD)) for each sub-band within the critical band, where the modification is based on an average estimated coherence for the critical band. The coherence-based modification produces auditory scenes having objects whose widths more accurately match the widths of the objects in the original input auditory scene.

The embodiment of the invention discloses a centralized base-band processing unit (CBPU), which comprises a switching module, at least one base-band unit (BBU) and a resource mapping module, wherein the resource mapping module is used for performing resource block de-mapping on an uplink frequency domain base-band signal obtained by fast Fourier transform (FFT), and separating a signal of each user from a corresponding sub-carrier; the switching module is used for transmitting the signal of each user to a corresponding BBU; and the BBU is used for processing the received signal of the user. Correspondingly, the embodiment of the invention also discloses a remote radio frequency unit (RRU) and a frequency domain transmission method. By the technical scheme, the transmission performance of a cloud radio access network (C-RAN) system can be improved.

The invention discloses a method, wireless network SDN controller and system for switching cells. The method comprises the following steps: when a measurement report sent by a user terminal is received and it is determined that a switching condition is satisfied, sending a switching request to a core network SDN controller; issuing corresponding uplink and downlink data flow table rules to object access points; issuing corresponding data forwarding flow table rules to source access points; sending switching indication to the user terminal through the source access points; when an air interface switching completion message sent by the user terminal through the object access points is received, sending a path conversion request to the core network SDN controller; and when the object access points receive all caching data forwarded by the source access points, indicating the source access points to delete the data forwarding flow table rules and releasing occupied wireless resources. According to the invention, by use of an SDN network architecture, data forwarding and route control are separated, the requirement for the transmission bandwidth between cells is reduced, and a unified platform is provided for cross-system switching.

The invention discloses a method and a system for carrying out voice control in multiple regions simultaneously, as well as a server and a microphone. The method comprises the steps that: the server selects a thread corresponding to each region of the multiple regions after receiving voice information of the plurality of regions, wherein the server stores the plurality of threads, and each thread corresponding to one region; and the server analyzes the voice information of each region of the multiple regions separately by means of the plurality of threads, so as to extract instruction information of a user, obtain playing content according to the instruction information, and control at least one loudspeaker in the corresponding region to play. Therefore, the voice information in the corresponding region is processed through the independent thread, the interaction control in a manner that multiple users in different regions use voice instructions simultaneously is achieved, the response time is ensured, and user experience is enhanced.

The invention relates to the technical field of information and communication, in particular to a method of managing cluster type dynamic network distribution trees of a video live broadcast distribution network. The method of managing the cluster type dynamic network distribution trees of the video live broadcast distribution network aims to further reduce the needs of video live broadcast services on network transmission bandwidth and reduce the transmission load of a relay node server. When a fringe node server needs to access the video live broadcast distribution trees of one video live broadcast serve, a video distribution network global server firstly searches a video distribution network node server nearest to the fringe node server in the video live broadcast distribution trees, and distributes the video distribution network node server to the fringe node server as the higher-level access node of the fringe node server, and therefore the fringe node servers located on identical geographic positions are enabled not to acquire an identical media stream from a far-end relay node server repeatedly.

The invention discloses a data compression transmission method of a remote equipment fault information acquisition system. The data compression transmission method comprises the following steps: acquiring a digital or analog quantity signal of a fault point of equipment to be detected in a timed manner according to a configuration information table by a fault information acquisition terminal; compressing acquired data by bit by the fault information acquisition terminal; uploading compressed data to a central server by the fault information acquisition terminal, and correspondingly storing the compressed data according to the configuration information table by the central server. According to the method, the fault information acquisition terminal is connected to a fault point sensor of the equipment to be detected and can be used for acquiring the digital and analog signals of the equipment to be detected; the acquired data is compressed and transmitted, so that the occupied space of the fault information data is greatly reduced, the data transmission quantity is reduced, the transmission real-time property is improved, and the requirement on the transmission bandwidth is lowered.

The invention discloses a transmission resource allocation method and transmission resource allocation equipment. The method comprises the following steps of: determining the transmission bandwidth quota of every cell in a set period; acquiring the actual data transmitting quantity of every cell in the period; and adjusting the transmission bandwidth quota of every cell in a next period accordingto the actual data transmitting quantity and the transmission bandwidth quota of every cell in the period. The requirement on the transmission bandwidth in a long-term evolution system can be reduced, and the transmission bandwidth can be shared among the cells of the same base station, so that the cost of operators can be effectively saved.

The invention discloses an extension visual encryption and decryption method. In the extension visual encryption process, a cover image is chunked first, and pixels in each block are divided into secret information pixels, auxiliary black pixels and common pixels; then (2,2) lines of a visual cryptography fundamental matrix are filled at the position of secret information, share images are divided into four areas, and secret images and watermark images are sequentially embedded into the four areas; at last, limited error diffusion is used for incorporating the characteristics of the cover image. In the extension visual decryption process, the two share images are overlaid in a staggered mode, and watermarks are recovered; then the two images align to each other to recover secret images. The extension visual encryption and decryption method has the advantages that image sharing is meaningful, the dimension is not extended, decryption does not need a computer, a tampering authentication function is achieved, and the recovered secrete images and the watermarks can be free of interference of the cover images at the same time.

The invention discloses an adaptive coding and transmitting method for live broadcast of mobile streaming media. The method is mainly applied to intelligent terminals such as intelligent mobiles phones and tablets. During the collecting, coding and transmitting process of live broadcast of the mobile streaming media, H.264 coding parameters and coding modes are automatically selected according to the hardware processing capability of the terminal and underlying operation system characteristics. Meanwhile, the video acquisition frame rate is reflectively adjusted in real time according to network transmission conditions. Through applying the method, the power usage and a calorific value of the terminal can be reduced as much as possible in the live broadcasting process of the mobile streaming media, and a specific balance between the live broadcast timeliness and the viewing experience can be achieved on the basis of the equipment processing capability and the available transmission bandwidth.

The invention discloses an automatic video inspection system and method for road traffic accidents. The system comprises a road patrol application platform and a video analysis processing platform; the road patrol application platform communicates with the video analysis and processing platform through a network; the system establishes network connection with a road monitoring video source and accesses a video to be patrolled; and the road patrol application platform comprises a video monitoring and patrol management module, an algorithm model registration and management module and a databasemodule; the video analysis and processing platform comprises a task scheduling module and an algorithm model service module. According to the automatic video inspection system and method for the roadtraffic accidents, based on a road traffic event video patrol service mode, with an intelligent video event detection technology, an extensible and distributed processing framework in which business application is decoupled from an algorithm model is constructed; the batch automatic polling of road monitoring videos and the automatic detection and alarming of various road traffic events can be realized, and road network video polling efficiency can be effectively improved, and the risk of the missed detection of the road traffic events is lowered.

The invention discloses a multi-class multi-scale multi-target snapshot method and system, and belongs to the technical field of artificial intelligence and computer vision, and the method comprises the following steps: obtaining a panoramic video processing frame from a miscellaneous scene; performing intelligent real-time multi-category multi-scale multi-target detection; carrying out on-line multi-target tracking category by category; carrying out deduplication and preferential selection on the snapshots; and transmitting a snapshot result to a server or a data center. According to the invention, on one front-end camera, real-time detection and analysis can be carried out on videos with multiple categories, multiple scales and multiple targets, and target object snapshot results which are classified, high in image quality and low in repetition and redundancy can be efficiently obtained.

The invention provides an image processing method, an image processing device and electronic equipment for a cloud true machine system. The image processing method comprises the following steps of acquiring continuous image frames displayed on a screen in real time; caching the collected continuous image frames; rendering the image frame at the current moment in the cached continuous image framesat every preset time interval, and outputting the image frame at the current moment after rendering; and carrying out hardware encoding on the rendered image frame at the current moment, and generating and outputting video streams corresponding to the continuous image frames displayed on the screen. The coding of screen images is executed by utilizing a hardware encoder at an electronic equipmentend, so that the delay of the cloud true machine system is reduced, the hardware requirements for local processing equipment are reduced, the number of the electronic equipment which can be accessed by the single remote processing equipment is increased, and the deployment cost is reduced. In addition, the electronic equipment directly transmits the video streams to the local processing equipment,compared with image data under the same definition, the requirements for the transmission bandwidth are reduced.

The invention provides an imaging system and an imaging method. White light and infrared light are adopted to irradiate a sample carrying fluorophores at the same time, the white light is reflected toform a first signal light, the fluorophores are excited to form a second signal light, an RGBIR image sensing module obtains a first RGBIR image signal of the sample according to the first signal light and the second signal light, and only one shoot is needed to obtain the first RGBIR image signal. The imaging system and the imaging method greatly reduce the amount of data needed to acquire the same data, reduce the requirement on a transmission bandwidth of the system, effectively improve the exposure adjustment time, can obtain better image noise suppression, have lower requirement on the exposure frequency of the RGBIR image sensing module, can use a rolling shutter image sensor with low price, and reduce the costs.

The invention discloses a GNSS interference source positioning method based on a radio wave propagation model. The method comprises the following steps of: (1) reasonably arranging detection nodes ina monitoring area range; (2) if the detection nodes detect an interference signal with the power exceeding a predetermined threshold, determining that there is interference; (3) receiving and processing the monitoring data sent by each detection node, and analyzing the position of the detection nodes, the power of the received interference signal, and the environment type information, then performing GNSS interference source positioning in combination with the radio wave propagation model by a center node; and (4) after the center node performs the interference source positioning, calculatingthe equivalent radiation power of an interference source by using the radio wave propagation model based on the detection node closest to the interference source. The GNSS interference source positioning method based on the radio wave propagation model adopts the radio wave propagation model applicable to various environments to calculate the losses of signal propagation paths, thereby improving the positioning accuracy of the interference source.

The invention is suitable for the technical field of desktop cloud, and provides an implementation method and device of graphics card virtualization, a desktop cloud system and a mobile terminal. The implementation method comprises the steps of calling a physical GPU by a client through a graphics card; abstracting the physical GPU into more than one VFIO virtual devices; calling one VFIO virtual device to generate a QEMU VGA device, and giving a GPU graphic processing function to a corresponding virtual desktop when the QEMU VGA device is called by a virtual machine; and by the client, displaying the content of the virtual desktop locally by using the QEMU VGA device. Through the method, requirements on a network transmission bandwidth can be reduced, and the signal transmission efficiency is increased.

The invention relates to a method for extracting vehicle state information from a center, and relates to the method for dynamically collecting vehicle information; the operation comprises a step of indicating a target net frame, a step of receiving the target net frame and a step of canceling the target net frame. In the step of receiving the target net frame, a vehicle terminal receives a net frame sent by any electronic control unit and checks self set files, if a frame identification code of the received net frame is recorded, then according to a digit, with digit value being 1, from corresponding mask codes, bytes with same series number are extracted from a net frame data segment; the bytes are then assembled in sequence to form a new data segment, the new data segment and the frame identification code of the net frame are compiled to form the target net frame sent to a central processing server by a wireless network; if the frame identification code is not recorded, then the net frame is discarded. The central processing server receives the target net frame, searches a bitmap and a mask code corresponding to the net frame according to the frame identification code, and the vehicle concerned state information can be extracted from the data segment of the target net frame according to the bitmap and the mask code; the state information can be stored and processed, and communication quantity can be reduced.

The invention relates to a method and a device for processing graphic instruction data, which are applied to a cloud interactive system. The cloud interactive system comprises a server and a terminal.The method comprises the following steps of acquiring the graphic instruction data when the server renders a graphical interface corresponding to an image frame; identifying whether the graphic instruction data is configured as particle effect data or not, wherein the particle effect data is used for describing particle effects in the graphical interface corresponding to the image frame; if so, compressing the particle effect data according to the characteristics of particle surfaces corresponding to the particle effect data; and sending the compressed graphic instruction data of the image frame to the terminal, and restoring the graphical interface corresponding to the image frame in the terminal through the sent graphic instruction data. By the adoption of the method and the device forprocessing the graphic instruction data provided by the invention, the transmission quantity of the graphic instruction data can be effectively reduced.

Embodiments of the invention provide a video transmission method. The method comprises the following steps that a server converts an original frame of a first video into an expression frame of the first video and converts an original frame of a second video into an expression frame of the second video, wherein the expression frame of the first video and the expression frame of the second video have the same resolution and the same bit depth; the server determines an average pixel value of pixel points of the expression frame of the first video and the expression frame of the second video whichhave the same timestamp, and determines a third video according to the average pixel value; the server encodes the third video; and the server sends the encoded third video to a client. A problem ofhigh bandwidth demand under a condition of high concurrency is solved.