Television camera and display employing quincuncial scanning
US5181102A · kind A · utility
3Cited by
6References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 5, 1991 |
| Grant date | Jan 19, 1993 |
| Priority date | — |
| Expiry date | Apr 5, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A television camera and display device, in which a transmission and reception utilizes quincuncial scanning (HDQ) with sub-sampling associated with an optical filter (9) for reducing the diagonal resolution of the image. The filter (9) prevents the folding of the spectrum when subsampling is employed, and permits the simplification of the device. The device may be implemented in both solid-state and vacuum tube form. It is applicable especially to high-definition television having only a restricted pass band and low sampling frequencies, and to the acquisition of and to the visual display of images in HDQ mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.