| 摘要 |
A set-top-box receives catalogs through digital TV data broadcast or through the Internet. The catalogs are stored as files on the STB e.g. on hard drive or solid state memory. Usually, a particular user will receive only a subset of transmitted catalogs according to preferences set or deduced from user-specific information such as location. Users can search the catalogs by store, category keyword or other terms. Catalogs can appear in the "channels" menu or the "library" menu or any other menu. The ordering of catalogs displayed in a menu can be arranged according to likely interest to a viewer, or with "specials" first, or "newest" first or "closest" first etc. Viewers can click straight to a catalog or item when invited during watching a show or a commercial. They can be notified of specials, new catalogs or new items by means of an icon or other popup, or a notice appearing on a menu, or by SMS or email etc.
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