Receiver and channel compatible encoding/decoding system for high definition video
US5561467A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1990 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | Mar 26, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N11/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
High resolution vertical and horizontal components of a high definition video signal are combined with a standard broadcast system video signal, such as the NTSC system, in which high frequency horizontal resolution components are sampled and used to modulate at least a first sub-carrier signal. The first sub-carrier is frequency interleaved onto the standard broadcast signal. Vertical high resolution components are time compressed and time division multiplexed onto top and bottom portions of the standard broadcast signal. The modified broadcast signal can be decoded by a standard receiver to display a standard resolution video image, while receivers designed to decode the modified signal can time division demultiplex the vertical high resolution components and demodulate the horizontal high resolution components, combine these components with the standard components, and generate a high definition video image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.