System and method for interconnecting and mixing multiple audio and video data streams associated with multiple media devices
US5170252A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1990 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Apr 9, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H60/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system (10) has a pipeline (12) comprised of a multi-channel bi-directional video bus (14), multi-channel bi-directional audio bus (16), and a digital interprocessor communications bus (18). The pipeline (12) is equipped with a number of ports (20) where media controller (microprocessor) printed circuit cards (22) can be connected, thus providing a convenient method for connecting media devices (24) to the pipeline (12). In this manner, a media device's video input and output can be optionally connected to any of the video pipes (26) of the video bus (14). Similarly, the media device (24) audio inputs and outputs can be optionally connected to any of the audio bus (16) pipes (26). The switching is accomplished through a pair of analog multiplexers (28) whose connection options have been commanded by local microprocessor (30) resident on the media device microprocessor control board (22). The local microprocessor (30) receives instructions for the pipeline switch interconnections through the interprocessor serial communications bus (18 ). The pipeline (12) is constructed on a motherboard printed circuit board (32) that additionally contains a microprocessor (34) that serves as the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.