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Method and system for streaming documents, e-mail attachments and maps to wireless devices

  • US 8,878,851 B2
  • Filed: 11/12/2004
  • Issued: 11/04/2014
  • Est. Priority Date: 11/12/2004
  • Status: Active Grant
First Claim
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1. A method for streaming vector images to wireless devices, comprising:

  • receiving a request from a wireless device for a portion of a vector image and a target display width and height, the vector image including a plurality of global vector primitives and the vector image being decomposed into a plurality of tile regions, wherein at least a portion of the global vector primitives overlap more than one tile region, and wherein the global vector primitives have associated ranges of relevant magnification levels, each range being a set of one or more magnification levels between a respective first level and a respective last level, the ranges not all comprising the same number of levels, and wherein the requested portion and the target display width and height correspond to a level of magnification for display;

    determining sub-divisions of each global vector primitive according to the one or more portions of overlap of the global vector primitive with the plurality of tile regions;

    encoding each of the determined sub-divisions as a local vector primitive;

    identifying the tile regions that overlap the requested portion;

    identifying the local vector primitives that belong to an identified tile region, and that were encoded from sub-divisions of those global vector primitives that have associated ranges of relevant magnification levels that include the level of magnification for display; and

    transmitting the identified local vector primitives in response to the request.

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