Dedicated programmable controller for interactive video disc system
US4855842A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1987 |
| Grant date | Aug 8, 1989 |
| Priority date | — |
| Expiry date | Aug 6, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2587
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A dedicated video disc player controller for use in interactive video disc playback systems. The controller includes memory for storing instructions representing particular commands to a video disc player in response to the present segment of the video disc being displayed and a plurality of external inputs provided through a keyboard. ports ports for communicating with a variety of non-standard control posts on various video disc players are all provided through a single 25 pin connector. The ports include three serial RS-232 level ports one TTL level serial port, one TTL level 8 bit parallel port, and several TTL input lines for reading control port responses from the video disc player. Plug insertable memory cards are used to provide instructions for playback sequence and response to keystrokes as well as for selectively downloading data indicative of the responses of past users, and modifying the operating firmware of the controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.