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Adaptive coding method based on VR terminal feedback

The invention discloses an adaptive coding method based on VR terminal feedback and belongs to the technical field of multimedia transmission. The core concept of the method comprises the steps that a transmission mechanism is improved; a panorama video is segmented into a plurality of visual angle videos; each piece of visual angle video information is independently coded and transmitted; the visual angle video information demanded by a user is transmitted in real time according to a terminal visual angle tracking technology; other visual angle information is transmitted in a low bit rate; various visual angle videos are spliced into the panorama video at the terminal; the user is enabled to obtain suitable visual angle information through adoption of the terminal scoring feedback mechanism; a scoring instruction of the user is transmitted to a server; and the server maps different bit rates to the terminal according to the user scores. The invention has the advantages that under the existing transmission channel capacity, the panorama video sill can be transmitted, so a VR technology can be realized on various platforms, the method is applicable to wide groups, a channel itself does not need to be excessively improved, and the user is enabled to select the suitable subjective watching experience through adoption of the terminal scoring feedback mechanism.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Navigation device and method capable of updating increment of map data

The invention relates to a navigation device capable of updating an increment of map data. The navigation device comprises a map data storage device, a network connecting device, a GPS (Global Positioning System) receiving device, a display device, a map data managing module, a navigation functional module and a display device. A navigation method capable of updating the increment of the map data is characterized by comprising the following steps: dividing the map data according to an administrative region boundary; simultaneously updating the data by a navigation data supply module; before downloading differential map data from a server, obtaining summary information from the server and showing the summary information to a user; and after downloading the differential map data from the server, emphasizing the displaying of a detailed updated content in the differential map data on the device before the map data is updated. The navigation device provided by the invention has the advantages: the user can select one or more updating regions for updating the map data according to the individual requirement; the updating time is saved; the user can select to update or not; the user experience is met; and the running of the device is stable and reliable.
Owner:SHENYANG MXNAVI CO LTD
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