发明名称 |
Method and apparatus for loosely sychronizing closed free-running raster displays |
摘要 |
The present invention is a means and method for synchronizing closed free-running systems, such as graphics systems, with no external synchronization signals required. Video games and most computer display controllers are closed free-running systems. Because most such systems have the means to switch between an interlaced and non-interlaced operation, and because interlaced and non-interlaced modes have a relative timing variation, the timing between two or more such closed free-running systems can be synchronized. This method allows synchronization with an imprecise timing reference. The vertical display timing is the free-running oscillator and the interlaced/non-interlaced mode transition is used as the timing adjustment means. The actual arrival time of data in a communication medium connecting two systems being synchronized is used in relation to an expected arrival time to provide the clock reference.
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申请公布号 |
US5790113(A) |
申请公布日期 |
1998.08.04 |
申请号 |
US19960713593 |
申请日期 |
1996.09.12 |
申请人 |
CATAPULT ENTERTAINMENT |
发明人 |
PERLMAN, STEPHEN G.;ROSKOWSKI, STEVEN G. |
分类号 |
G09G5/12;H04N5/073;H04N7/01;(IPC1-7):G09G5/00;H04N5/05 |
主分类号 |
G09G5/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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