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Retrieval of additional information not found in interactive TV or telephony signal by application using dynamically extracted vocabulary

  • US 5,809,471 A
  • Filed: 03/07/1996
  • Issued: 09/15/1998
  • Est. Priority Date: 03/07/1996
  • Status: Expired due to Term
First Claim
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1. A system receiving an input signal from a program and displaying said program on a program display medium to a user, said input signal having a plurality of information components for which an application can provide expanded information not found provided in said input signal, said system comprising:

  • a context extractor for extracting each of said plurality of information components from said input signal;

    a buffer for receiving and storing each of said plurality of information components extracted by said context extractor for a predetermined time;

    a user interface for said user to make a request to receive said expanded information regarding at least one of said plurality of information components; and

    a recognition processor for receiving said request, for recognizing a match between said request and said information components extracted by said context extractor, and for forwarding said match to said application, whereby said application retrieves said expanded information and provides said expanded information for display on said displaying medium.

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