Method and apparatus for limiting band of moving-picture signal
US6101220A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 1997 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Jul 24, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A motion-compensated predictive error signal is generated in response to a moving-picture signal for every frame related to the moving-picture signal. Calculation is made as to an activity for each of pixels composing the frame in response to the motion-compensated predictive error signal. The activities for the respective pixels composing the frame are accumulated to calculate a 1-frame activity accumulation value. A band of the moving-picture signal in at least one of a spatial direction and a temporal direction is limited with a controllable band limiting characteristic. The controllable band limiting characteristic is controlled in response to the activity for each of the pixels and the 1-frame activity accumulation value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.