Methods and apparatus for generating a picture-in-picture digital television frame by inserting a mean-only frame into a full-size frame
US5361098A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1992 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Nov 30, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/2365
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for generating a picture-in-picture digital television frame comprises the steps of: converting a first analog television signal into a first digital frame comprising a first prescribed number of pixels; deriving a mean-only frame from the first digital frame, the mean-only frame comprising a second prescribed number of pixels; creating an insertion frame on the basis of the mean-only frame; and inserting the insertion frame into a second digital frame, thereby generating a picture-in-picture digital television frame. A Vector Quantization receiver/decoder comprises a mean-only decode section 20, a full decode section 30, and an image inserter 40.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.