Method for compressing and decompressing moving picture information and video signal processing system
US6373892B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1995 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Nov 13, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4348
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for compressing and decompressing moving picture information wherein a key signal is correctly reproduced and coding is efficiently carried out, and a video signal processing system for implementing the method. At the time of coding a video signal, conversion is carried out for make large a distance between an ordinary digitized video signal and a key signal indicative of whether an image indicates background or foreground for data compression. At the time of decoding the coded video signal, the video signal and key signal of the decompressed image are separated based on a predetermined threshold and reverse conversion opposite to the coding mode is carried out. Since the coding is carried out with the ordinary video signal separated from the key signal, the video signal and the key signal can be separated by a suitable threshold from the compressed and then decompressed image and thus the video signal and key signal can be correctly reproduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.