Video signal processing
US6643325B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2000 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Jan 28, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Video signal processing apparatus in which at least two input video signals are combined in proportions determined by a pixel key signal to generate an output video signal for compression, at least one of the input video signals each having respective associated compression parameters from a data compression process applied to that video signal. The apparatus functions to estimate the quantity of data which will be produced by compression of a current image of the output video signal, compares the detected quantify of data with a target quantity of data, to determine whether a data overflow is expected, and in the event that a data overflow is expected, determine which blocks of the output video signal can be compressed by re-using compression parameters from corresponding block of one of the input video signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.