发明授权
US5579057A Display system for selectively overlaying symbols and graphics onto a
video signal
失效
用于将符号和图形有选择地叠加到视频信号上的显示系统
- 专利标题: Display system for selectively overlaying symbols and graphics onto a video signal
- 专利标题(中): 用于将符号和图形有选择地叠加到视频信号上的显示系统
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申请号: US369867申请日: 1995-01-05
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公开(公告)号: US5579057A公开(公告)日: 1996-11-26
- 发明人: Robert O. Banker , Cham Ith , Kinney C. Bacon , David B. Burleson
- 申请人: Robert O. Banker , Cham Ith , Kinney C. Bacon , David B. Burleson
- 申请人地址: GA Norcross
- 专利权人: Scientific-Atlanta, Inc.
- 当前专利权人: Scientific-Atlanta, Inc.
- 当前专利权人地址: GA Norcross
- 主分类号: H04N5/272
- IPC分类号: H04N5/272 ; H04N5/445 ; H04N5/45 ; H04N7/088 ; H04N7/16 ; H04N21/2743 ; H04N21/41 ; H04N21/431 ; H04N21/4786 ; H04N21/4788 ; H04N21/488 ; H04N21/6547 ; H04N5/262 ; H04N5/278
摘要:
A display system for the on screen display of information for a subscriber terminal of a subscription television system includes a display processor which can display information in the form of a display screen stored in a display memory. The display processor can be preprogrammed by the control processor with a plurality of display attributes including different symbol sets, different color palettes, whether the screen is to be a text screen, graphic screen or a combination of a text and graphics system, and the size and location of each screen display on the display area. The display processor includes a digital processor and an analog processor. The digital processor controls accessing the display data from the memory and converting it into timed digital pixels. The analog processor includes a digital to analog pixel converter which produces analog pixels from the digital pixels in a timed relation to an input video signal. The analog processor includes a multiplexer which substitutes the analog pixels for the pixels of the input video signal when display processor is active.
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