467results about How to "Save transmission bandwidth" patented technology

Embodiments of the present invention provide a communication system and management method thereof. The communication system includes: a radio transceiving layer, including a radio transceiving node combination, where the radio transceiving node combination includes at least one type of the following: a macro cell RRU, a Pico cell RRU, and a Pico cell BRU; a local computing layer, including a local computing node, connected to a radio transceiving node in one or multiple neighboring radio transceiving node combinations and configured to execute all communication processing or a first part of communication processing of a cell corresponding to the local computing node; a centralized computing layer, including a centralized computing node, connected to the local computing node in the local computing layer and configured to execute a second part of communication processing, where the all communication processing includes the first part and second part of communication processing.

The invention discloses a panoramic video playing method and device. The method comprises: receiving a panoramic video playing request of a player, the panoramic video playing request including user viewpoint position information; according to the user viewpoint position information, determining a video unit to be played, the vide unit being obtained by dividing the video frame of a panoramic video to be played in advance; and sending a vide unit determined to be played to a player in a video stream mode to solve the problem of a low use ratio of a transmission bandwidth in the present panorama video playing technology.

The invention relates to multimedia communication technique, disclosing a multimedia communication method and the terminal design and implementation thereof, improving transmission reliability and communication quality. And the invention adopts ERRTP to provide a transmission layer packing form able to carry error resilient encoding solution related information on the basis of the existing RTP protocol, making multimedia data label the corresponding error resilient encoding solution related information while transmitted on ERRTP, thus merging error resilient mechanism into the transmission layer; in accordance with H.264 NALU structure, the invention provides a special ERRTP packing method and protocol header modification solution, able to integrate all NALU header bytes in the same ERRTP packet into its header, thus expressing important information of NALU in the ERRTP header and raising transmitting efficiency.

The invention discloses a network data processing method, device and system. The method comprises: a server acquires collected multiple network data of multiple firewalls in a running process, wherein the multiple firewalls are configured at multiple local area network exports, and each network data at least comprises: a running state of each firewall, flow data, domain name information, suspicious files and threatening information; the server analyzes the multiple network data, thereby obtaining multiple analyzed network data; the server stores the multiple analyzed network data into a first database; and meanwhile, the server runs multiple analysis engines and analyzes the multiple analyzed network data, so that analysis results are obtained, and then protective capability of each firewall is enhanced. The network data processing method, device and system solve a technical problem of low data processing accuracy caused by the loss of network data arriving at a host and the server due to the fact that the network data is from the host and the server of a local area network and the firewalls filter a part of the network data in the prior art.

The embodiment of the invention provides a Content transmission method applied to the technical field of virtual reality. In the method, a virtual reality terminal establish network connection with a video system; the virtual reality terminal detects the visual angle information of a user in real time; the visual angle information of the user is synchronized to the video system; and video contents returned by the video system on the basis of the visual angle information are received, wherein the video contents comprise a first picture corresponding to a main visual angle and a second picture corresponding to a non-main visual angle, and the video quality of the first picture is higher than the video quality of the second picture.in the method, the video system adopts a high-quality way to transmit the video contents in the current visual angle range of user, the video contents in the non visual angle range of the user are transmitted by a low-quality way, and the consumption of network transmission resources is lowered.

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 system comprises a key frame information extracting unit and an image browsing terminal. Wherein, the key frame extracting unit is used for extracting the adjacent iframes from the bit-stream; when the histogram difference of the adjacent iframes are over a preset threshold, the video frame is extracted between said adjacent iframes; the extracted video frame and said adjacent iframes are sent to the browsing terminal. Said image browsing terminal is used for displaying the extracted video frame and adjacent iframes in order to provide them for manually examination.

The embodiment of the invention discloses a method for establishing a service and a method, equipment and a system for providing a service, wherein the method for establishing the service comprises the following steps that: a mobile gateway receives a service establishing request transmitted by a user; when determining that the service can be provided by a cache server within a mobile network, the mobile gateway informs the cache server of establishing a service connection with the user. By establishing the connection between the user and the cache server within the mobile network, the response time of a user request service can be shorten and a backhaul transmission bandwidth requirement can be saved.

An underwater communications system for transmitting electromagnetic and/or magnetic signals to a remote receiver, the system having a data input; a digital data compressor for compressing data that is to be transmitted; a modulator for modulating the compressed data onto a carrier signal and an electrically insulated, magnetic coupled antenna for transmitting the compressed, modulated signals.

The embodiment of the invention discloses a webpage browsing method. The method comprises the steps: when receiving the webpage request of a user, downloading the page information of the requested webpage; analyzing the page information to obtain the page core content of the requested webpage; and composing the page core content, and displaying the composed requested webpage. The embodiment of the invention also discloses a webpage browsing device and a mobile terminal. With the adoption of the webpage browsing device and the mobile terminal, the transmission bandwidth can be saved, the response speed of the webpage request is increased, and the webpage browsing effect and the browsing experience of the user are increased at the same time.

Trick modes are substantially prevented during DVR and NDVR content by obtaining an audiovisual asset that is digitally compressed in accordance with a compression technique employing at least a plurality of substantially complete frames and a plurality of substantially intermediate frames, substantially removing the plurality of substantially complete frames from a portion of the asset for which trick play is to be substantially prevented, and streaming the asset, with the plurality of substantially complete frames substantially removed from the portion thereof, to a user thereof.

The invention discloses an exception event detection and double-stream coding-based video monitoring method in the technical field of video monitoring. The method comprises the following steps: initializing operation environment of a system, completing network configuration of the system, and regularly detecting a storage medium and a network connecting state; acquiring video information of a current monitored area, and respectively performing exception detection and double-stream coding processing on preprocessed video data; according to the acquired exception detection result and coding result, starting up alarm linkage, selectively remotely transmitting low-quality bit streams subjected to the first kind of coding in the double-stream coding image information, and performing ring buffer-based exception event storage on high-quality bit streams subjected to the second kind of coding; decoding, displaying and storing the acquired image information subjected to the first kind of coding at a receiving end; and locally storing the acquired image information subjected to the second kind of coding. The method can realize real-time browsing of the video and high-quality historical image check, and has the advantages of low cost, simpleness and reliability, and complete monitoring information.

The invention provides a method and device for carrying out a video call based on virtual face expressions. The method comprises the steps of acquiring first video frame data and first audio data corresponding to the first video frame data sent by a first user based on a call terminal continuously in real time, wherein the first video frame data comprises first face feature values of the first user; selecting a virtual face model and generating the virtual face expressions corresponding to the virtual face model according to the first video frame data; and playing the virtual face expressionscontinuously in real time, and decoding and playing the corresponding first audio data at the same time. According to the method, the other party in the video call only needs to provide data comprising the face feature values, then a local terminal regenerates the virtual face expressions only comprising the expression information of the user at the opposite side according to the face feature values and the virtual face model, the information of the user at the opposite side can be prevented from being leaked, the information security is ensured, and the privacy can be improved.

The invention discloses a user interface protocol stack, applied to radio evoluted networkin two-layer node structure, comprising IP access gateway (IAGW) user interface protocol stack, edge radio station (ERS) user interface protocol stack and uer end (UE) user interface protocol stack, where the IAGW user interface protocol stack comprises: layer L1, layer L2, IP layer and higher layer; the ERS user interface protocol stack comprises equivalent layer L1, layer L2, IP layer and higher layer on E-I interface side between it and IAGW; the radio interface side comprises: radio layer L1, lower layer and head compression layer; the UE user interface protocol stack comprises equivalent radio layer L1, lower layer and head compression layer to those on ERS radio interface side. And the invention also discloses a head compressing method in the two-layer node structure, implementing head compression of air interface data packet between ERS and UE.

The utility model provides an encoding and decoding method based on the DCT resolution telescopic image, which is characterized in that, in the process of coding, an original image or video frequency frame is divided into (4xN)2x(4xN)2 macro blocks, the macro blocks are divided into (4xN)x(4xN) code blocks, the same frequency is arranged in a same restructuring encoding block to encode according to the PRI of the resolution property by using the frequency of the coefficient in the code blocks after DCT quantification, the corresponding position relations of the frequency in the blocks, and the resolution characteristic; in the process of decoding, the received restructuring encoding block is reverted to the DCT position in the original macro blocks, and the IDCT encoding block is selected to recompose the resolution telescopic image according to the resolution grade of the current coding block. The encoding and decoding method has an advantage that the corresponding coding flow can be transmitted according to the different receiving ends, so the transmitting bandwidth is effectively saved, and the resolution telescopic coding and decoding code is agile than the DWT.

The invention discloses one visual data compression method, which comprises the following steps: coding device gets original visual frame sequence; using all original visual frequency frame for computation to compress redundant information to get codes information and to send the information to the decoding device; decoding device gets coding information from coding device; through coding device getting the preset computation information and to restore original visual frequency sequence from coding device.

The invention provides a compression and decompression method, device and system based on a cloud compression link, aiming at solving problems of not allowing to upload files as attachments and limiting file share in a network. The compression method comprises the following steps of: triggering a cloud compression request; automatically compressing local file data to be compressed according to the cloud compression request by a client side and uploading the compressed data to a server and storing as the cloud compression data; generating a corresponding cloud compression link according to the cloud compression request by the server and sending the cloud compression link to a client side; and creating a mapping relation between the cloud compression data and the cloud compression link by the server. The method provided by the invention has the capability of transferring files with any sizes into the cloud compression links so as to conveniently send the files to others, save the transmission bandwidth and easily share, and facilitates file share without attachment uploading nearly in any place, such as an instant messaging window, microblog, forum and email and the like where the characters can be input.

The invention provides a communication network element, a clock frequency correction system and method. The communication network element comprises an acquisition module, a jitter value estimation value, a frequency offset calculation module and a correction module, wherein the acquisition module is used for acquiring a packet transmitting time stamp value and a local packet receiving time stamp value which are carried in an RTCP (Real-Time Control Protocol) message when the RTCP message which serves as a clock reference clock and is transmitted by an opposite end communication network element is received; the jitter value estimation module is used for estimating the jitter value of the RTCP message; the frequency offset calculation module is used for calculating a clock frequency offset according to the packet transmitting time stamp value, the packet receiving time stamp value and the jitter value of the RTCP message; and the correction module is used for correcting a time frequency according to the clock frequency offset. By adopting the system and the method, clock frequency can be corrected easily and effectively.

The invention provides a high performance video encoding method in combination with frame rate conversion for the HEVC encoding standard. The method mainly comprises the following steps: performing self-adaptive frame-extracting on an original video at an encoding end to lower the transmission data amount; performing HEVC encoding on a low frame rate video, performing motion vector estimation on a lost frame in combination with the reference frame motion vector extracted from the code stream and the intra-frame blocking information, and then reconstructing the lost frame through the improved two-way motion compensation inserting frame based on block coverage in combination with the above mentioned motion vector at a decoding end. The transmission data amount is lowered due to self-adaptive frame-extraction, and the transmission bandwidth is saved; plenty of time is saved since the process of performing repeated motion estimation on the decoded video is omitted; and the quality of the reconstructed video is guaranteed due to the improved two-way motion compensation inserting frame based on block coverage. An experimental result shows that the algorithm provided by the invention saves about 15% of code rate in the premise of guaranteeing that the reconstructed video PSNR approaches to consistency at a middle and low code rate end, and the encoding time is saved nearly 40% at the same time.

The invention provides a color image compression and encryption method based on compressed sensing and a double random encryption mechanism. The method comprises the following steps: firstly, decomposing a plaintext image into R, G and B components; the method comprises the following steps: firstly, obtaining a sparse coefficient matrix, then respectively performing DWT conversion on the sparse coefficient matrix, then performing double random position scrambling on the sparse coefficient matrix by using index vectors D1, D2, D3 and D4, then performing compression measurement and quantification on the scrambled matrix, performing simultaneous double random pixel value diffusion among R, G and B components and inside the components on the quantified matrix, and finally obtaining a ciphertext image. Parameters and initial values of a four-wing hyper-chaotic system and a Logistic-Tent chaotic system are generated by using plaintext image information and an external key, and then the parameters and the initial values are substituted into the Logistic-Tent chaotic system to generate a chaotic sequence to construct a measurement matrix; and then substituting the parameters and the initial values into a four-wing hyperchaotic system, and sorting the four generated chaotic sequences to obtain four index vectors which are respectively used for double random position scrambling and diffusion.

The invention discloses an image display method, device and system as well as a storage medium and a processor. The method comprises the following steps that a control end sends a first control command to a source end, wherein the first control command at least comprises identification information of a to-be-intercepted application window; the source end carries out screen shot on the to-be-intercepted application window according to the first control command in order to obtain image data of the to-be-intercepted application window; the source end sends the image data of the to-be-intercepted application window to a display server; and the display server controls a splicing screen to display the image data of the to-be-intercepted application window. The invention solves the technical problem that the image display method in the existing technology cannot only display the application window on the source end.