Variable resolution transition placement device
US6373515B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 9, 2000 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Aug 9, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04798
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A variable resolution transition placement circuit in an electrophotographic imaging device allows transitions to be placed within a stream of video data so that the pixel resolution achieved over a scan line is adjustable on a pixel by pixel basis using a system clock. Pixel data defines transition positions relative to a synthesized video clock defining pixel time periods. A converter converts positions of the transitions relative to the synthesized video clock to positions relative to the system clock using a value provided by a synthesized video clock to system clock transform generator. The value can change between synthesized video clock cycles to change the pixel resolution. A synthesized video generator generates values of a synthesized video clock relative to the system clock. Offset values generated from values of the synthesized video clock, the positions of the transitions relative to the system clock, and phase difference values from a phase measuring device are combined to determine the positions at which the transitions will be generated relative to the system clock. The values representing the positions at which the transitions will be generated are stored in a tran…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.