Dual band progressive television system with noise reduction
US5130798A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 31, 1991 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | Jan 31, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An input filter separates a luminance input signal into a high frequency component that is noise reduced by coring and a low frequency component that is noise reduced by a frame recursive filter preceded by sub-sampling and followed by sample rate restoration by interpolation. An output circuit combines the noise reduced components to provide a processed output signal in which high frequency portions thereof are subjected to coring and low frequency portions thereof are subjected to recursive filtering. In a specific application the frame recursive filter provides a plurality of low frequency sub-sampled components which are combined with the processed output signal in a further output circuit to provide a noise reduced output signal of progressive scan form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.