Widescreen television transmission system utilizing conventional equipment including a camera and VCR
US4897722A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 1988 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | Apr 7, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N11/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A widescreen enhanced definition television system compatible with an existing television standard (e.g., NTSC) has provisions for utilizing a conventional television camera. The conventional camera is modified by replacing the conventional lens with an anamorphic lens or by modifying the scanning control signals to produce a widescreen television signal corresponding images with a widescreen aspect ratio (e.g., 5:3) greater than the conventional aspect ratio (e.g., 4:3). The widescreen television signal produced by the modified camera is coupled to an encoder without restriction of horizontal bandwidth required to conform to the existing television standard. The encoder produces a television signal encoded with components for producing widescreen images with enhanced horizontal resolution when processed by a widescreen receiver but suitable for transmission within a single transmission channel of the existing television standard. When processed by a conventional receiver, due to the nature of the encoding, an image with the conventional aspect ratio but, without significant artifacts is produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.