Video signal processing with motion compensation at low bandwidth
US5754246A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1995 |
| Grant date | May 19, 1998 |
| Priority date | — |
| Expiry date | Feb 16, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/014
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for reducing the deleterious effects of motion in a video signal process. The video signal process is conducted at high bandwidth without motion compensation and a like video signal process is conducted at low bandwidth without motion compensation to produce a low bandwidth control signal. A similar video signal process with motion compensation is conducted at low bandwidth to produce a low bandwidth motion compensated signal. The low bandwidth control signal and low bandwidth motion compensated signal are compared to produce an error signal which is subtracted from the high bandwidth video signal process. Video signal procession apparatus includes parallel high and low bandwidth paths. The high bandwidth path contains a processing unit conducting a video signal process at high bandwidth, the low bandwidth path contains a differential video processor providing the difference between two low bandwidth video processes, each equivalent in function to the high bandwidth video signal process, but only one being motion compensated. Additional components combine the high and low bandwidth paths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.