Retrieval of additional information not found in interactive TV or telephony signal by application using dynamically extracted vocabulary
US5809471A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1996 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Mar 7, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/488
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is provided to enable a user watching and/or listening to a program to retrieve supplemental information or supplemental entertainment pertaining to an item just seen or words just heard. The apparatus includes a recognition system which recognizes the user's request and causes its satisfaction to be provided. A dynamically changing dictionary is created from items or keywords extracted from the most recently received program portion. The items or keywords may be contained in closed caption text in a TV signal. Particular items or keywords may be assigned a high priority so that they are maintained in the dictionary for a long duration. The user's request is matched against this continually changing dictionary. Upon recognition of the request, a search is initiated to access, import and deliver to the user the information required to satisfy the request. The information may be presented to the user separately or in coincidence with the normal program using picture in picture or split screen. Alternate embodiments enable preprocessing to obtain and store expanded information for such items and keywords deemed to be of high priority. This speeds up the satisfac…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.