Color television signal processing apparatus
US4394680A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1981 |
| Grant date | Jul 19, 1983 |
| Priority date | — |
| Expiry date | Mar 31, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/75
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A novel color television signal processing apparatus which is capable of producing a keying signal (soft key signal) with gradation usable for such signal processing as detecting portions with a specified color in a first composite color television signal and inserting a second color television signal in the detected portions, and is capable of processing line (encoded) and soft chromakey operations by producing a soft chromakey signal from a composite color image signal made by, e.g. NTSC system, and further enables efficient image mixing operations by sampling color television signals or using stored data of three color signal components and obtaining a keying signal with high precision in digital signal processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.