Video modem termination system and method
US7849488B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 15, 2004 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Sep 16, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Highly asymmetrical nature of digital video allows a single Cable Modem Termination System (CMTS) like device to support the transmission over a thousand individual high-quality IP packetized video data channels terminating into low cost cable modem units. A Video Modem Terminating System (VMTS) unit handles housekeeping information. As the amount of upstream housekeeping data are small, even for 1000 simultaneous TV channels, the data can be inserted into the digital video cell streams and packaged within IP packet envelopes. The VMTS unit is equally effective for MPEG-2, MPEG-4, Microsoft Media 9 and other digital encoding of video and audio signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.