Structure-Aware Web Transcoding for Mobile Devices
نویسندگان
چکیده
As both the number of mobile users and users’ reliance on the Web grows, so does the need for Web access from handheld devices.1 The current disparity between such devices’ available computing resources and the resources required for smooth Web browsing makes it difficult and unpleasant to access Web pages with them. To navigate complex Web pages with a handheld device, a user must scroll down and across the page many times. Furthermore, although handhelds are becoming more powerful, few can satisfactorily handle multimedia data. Two general solutions to this disparity exist: manual and automatic reauthoring. In manual reauthoring, Web authors prepare multiple versions of a Web page targeted to resource profiles of various platforms, including the Wireless Application Platform (www.wapforum.org).2,3 Although this approach can produce high-quality pages for specific devices, it assumes a Web author will both be available to reauthor the pages and will know what pages users will want to access. Because no one can predict how Web surfing will progress (during a mobile Web search session, for example), this approach severely limits the number of Web pages accessible via handheld devices. In automatic reauthoring,4,5 a transcoding module transparently converts individual pages, making all Web pages accessible. Although attractive in theory, this approach is not yet widely used because the transcoding quality is poor. Systems such as Pixo (www.pixo.com/ products/products002.htm) generate almost unusable pages from complex Web pages with large nested table structures. Existing automatic reauthoring techniques ignore the relative importance of Web page components — basic units for transcoding — which can be extracted through syntactic analysis of the page’s HTML source code. Furthermore, because most existing transcoding techniques are local transforms, they do not consider the
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ورودعنوان ژورنال:
- IEEE Internet Computing
دوره 7 شماره
صفحات -
تاریخ انتشار 2003