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Downloading applications software through a broadcast channel

  • US 5,978,855 A
  • Filed: 11/28/1997
  • Issued: 11/02/1999
  • Est. Priority Date: 05/27/1994
  • Status: Expired due to Term
First Claim
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1. A memory system for a digital set-top terminal device comprising:

  • (b) a protected memory storing an operating system and a resident application for controlling operation of the digital set-top terminal to provide a first user interface functionality; and

    (c) a random access memory for receiving and storing a non-resident application for controlling operation of the digital set-top terminal to provide a second user interface functionality;

    wherein;

    the operating system and the resident application are for controlling all communications of the digital set-top terminal with elements of any communication network coupled to the digital set-top terminal, andthe resident application provides a software interface for any non-resident application that may be stored in the random access memory, said software interface providing a set of predetermined function calls to facilitate communication with elements of the communication network during selective execution of a non-resident application by the digital set-top terminal.

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