Self calibrating cable for a high definition digital video interface
US7970567B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2008 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Oct 20, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/205
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An HDMI cable may exhibit frequency dependent signal attenuation, inter symbol interference, and inter-pair skew. A boost device integrated with the cable can compensate for such impairments of the cable. A self calibrating cable with a boost device of the embodiment of the invention is described, in which parameters that control the response of the boost device are set optimally in a self-calibrating process comprising looping the boosted cable on itself through a calibration fixture that contains a calibration control device. The boost device includes pattern generators and a sampling circuit. Each high speed channel of the cable is separately tested and calibrated with the help of one of the other channels serving as a sampling channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.