35results about How to "Guaranteed viewing quality" patented technology

This invention relates to a media server and method for realizing media route thereof, which contains coding unit, decoding unit, code stream conversion unit, main control unit, network management control unit, IP network unit, hard disc storage unit, DVD-ROM driving unit, DVD-S / DVB-C / DVB-T receiving unit, and multicomplexing unit, which features 1, converting various audio-video data stored in different medium into TS stream adapted to digital television broadcast, then outputting through ASI or IP network, to effectively utilize various kind of media data and realize digital broadcast in minimum image loss, 2, converting the real time program received by DVD-S / DVB-C / DVB-T receiving unit through media route, playing more than two times program in one channel after multiplexing.

The invention discloses a video source determination method comprising the steps of when the condition that a first video source of a currently playing video is in an abnormal state is monitored, recording a time length of the first video source in the abnormal state, and determining a first time length; judging whether the time length of the first video source in the abnormal state is more than the first time length; when the time length of the abnormal state is more than the first time length, determining a second video source based on a preset changing strategy; and playing the currently playing video based on the second video source. The embodiment of the invention provides a video source determination device and a computer readable storage medium.

The invention relates to an operating method of a tracking system, an HMD (Head Mount Display) device and a tracking system. The operating method is suitable for the tracking system. The operating method includes the following operations: obtaining, by a processor, a parameter of a lens of the HMD device; calculating, by the processor, data of a foveation area according to the parameter; generating, by the processor, a foveation image according to the foveation area; generating, by the processor, a peripheral image whose resolution is lower than a resolution of the foveation image; and merging, by the processor, the foveation image and the peripheral image to generate a viewing image; and outputting, by the processor, the viewing image.

The invention discloses a self-adaptive scalable video coding and decoding structure design method which is based on a region of interest and a scalable video coding and decoding technical system architecture of the region of interest (ROI); the content of a video is segmented by a self-adaptive video segmentation and tracking technology, thereby realizing the separation of the region of interest(ROI) from a background; the time-domain redundancy is eliminated by a regional motion compensation time-domain filter technology of the ROI; information of the region of interest (ROI) can be coded and transmitted prior to the background region by a ROI self-adaptive bit plane lifting technology of regional wavelet, thereby obtaining better visual effect under the low code rate; a regional time-frequency domain factor carries out the distinction between the region of interest (ROI) and the background by a regional self-adaptive template technology; and the self-adaptive code rate distribution of the region of interest (ROI) and the background is realized by a regional self-adaptive code rate control technology.

The invention provides a video image transmission method and a device thereof, relating to the technical field of data transmission, wherein the video image transmission method comprises the followingsteps of: detecting, by a video transmitting end, a data transmission quantity of a transmission medium connected thereto; when a main body resolution value of the image data is greater than the foreground resolution value, and when the main body resolution value is greater than the background resolution value, dividing each frame of image of the video data to be transmitted into a plurality of image blocks; when the data transmission amount is smaller than the pixel, calculating the difference between the data transmission amount and the pixel, reducing the pixel of the selected image blocksby selecting image blocks with the least varieties, and calculating the reduction amount of pixel of the image blocks; when the reduction amount and the difference are equal, updating the image blocks with the least color type as the saved image blocks, and putting the un-updated image blocks and the saved image blocks into a transmission medium for transmission, thereby improving the matching degree between the image data and the transmission medium.

A seamless data transmission system between a digital TV network and a mobile communication network. The system receives a digital television signal from a digital television network and detects a decoding bit error rate of the digital television signal at a first frequency. When the decoding bit error rate detected at the first frequency is continuously greater than the first threshold value, the decoding bit error rate of the digital TV signal is detected at the second frequency and the average signal strength of the mobile communication network is detected. When the decoding bit error rate detected with the second frequency is continuously greater than the second threshold and the average signal strength is continuously greater than the third threshold, establish a network connection with the multimedia server through the mobile communication network and receive multimedia data from the multimedia server. The invention also provides a seamless data transmission method between the digital television network and the mobile communication network.

The invention provides a file sharing system and a corresponding file sending and receiving method and device, and relates to the technical field of file sharing. The file sharing system includes a file sending device and a file receiving device. The file sending device includes a file format conversion module, a file format conversion module, a first file compression module, a second file compression module, and a file sending module. The file receiving device includes a file receiving module. module, a first decompression module, a second decompression module, and a file format conversion module. Since the document is divided into small pieces by page and better compressed, the timeliness of document sharing can be realized, and the page-by-page segmentation also realizes the page-by-page synchronization of document sharing control. The document conversion format is an enhanced metadata file, which can be displayed on the Windows platform without installing other tools.

The invention relates to a method for controlling relay in alternative multi-view-point video flow media service, which belongs to the technical field of multimedia data transmission. The method mainly comprises the following steps: firstly, carrying out the time synchronization between users and a server, wherein the server enables the users who watch the same view-point to build a view-point inner overlay network, all the view-point inner overlay networks together build an overlay network between the view-points, when the users watch multi-view-point video programs, the equal overlay networks are added on the two levels, key frame data in the multi-view-point programs is averagely divided into a plurality of key frame data segments and are respectively transferred to audiences who watchthe different view-points, all the audiences mutually exchanges the key frame segments of their own, and the bandwidth spending of the server during the transmission process is reduced according to the transmission condition of the current data. The method reduces the dependence to the bandwidth resource of the server during the view-point switching process according to the neighbor node bandwidthresources, reduces the intermediate section during the view-point switching process, speeds up the switching speed of the view-points, improves the service quality and increases the watching experience of users.

The invention discloses a coding / decoding method for fountain codes. The coding method comprises the following steps: dividing raw data blocks into different information layers in the descending order of priority; precoding each information layer at the same code rate, connecting the obtained coded layers in a cascade mode, and sending to a priority LT coder to carry out LT coding; and in the coding process, dynamically adjusting the size of the input symbol set of each code symbol according to the adjustment parameter, and controlling the unequal protection degrees of data in different priorities. The decoding method comprises the following steps: a priority LT decoder decodes the received coded data packet to obtain output data with unequal error protection functions; a data diverter divides the output data into different coded layers according to the number of layer; and each coded layer is respectively sent into the corresponding precoding decoder to decode the precoding, thereby restoring each information layer. The invention also discloses a coding / decoding device for fountain codes. By using the invention, video can be efficiently and reliably transmitted in a layered multicasting environment.