Apparatus and method using speech understanding for automatic channel selection in interactive television

摘要

A speech understanding system for receiving a spoken request from a user and processing the request against a knowledge base of programming information for automatically selecting a television program is disclosed. The speech understanding system includes a knowledge extractor for receiving electronic programming guide (EPG) information and processing the EPG information for creating a program database. The system also includes a speech recognizer for receiving the spoken request and translating the spoken request into a text stream having a plurality of words. A natural language processor is provided for receiving the text stream and processing the words for resolving a semantic content of the spoken request. The natural language processor places the meaning of the words into a task frame having a plurality of key word slots. A dialogue manager analyzes the task frame for determining if a sufficient number of key word slots have been filled and prompts the user for additional information for filing empty slots. The dialog manager searches the program database using the key words placed within the task frame for selecting a program, and produces a signal for selecting a television channel associated with the program.