Mapping uniform resource locators to broadcast addresses in a television signal

摘要: Web pages and other Internet information resources are retrieved from a one-way broadcast signal such as television signal. A user selects range of available information, including hypertext markup language (HTML) pages, which is carried in the stream by invoking command defined according to uniform resource locator (URL) format. Table mapping data provides address corresponding URL request for use identifying location desired can be retrieved. The may provide regarding frequency, packet identifier, satellite, transponder, cryptographic scheme, modulation rate, error correction page number or relevant criteria associated with must known retrieve requested information. system has look feel two-way connection, compatible existing transmission schemes.