Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1993-11-15
1996-02-13
Chan, Wing F.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345189, G09G 114
Patent
active
054914981
ABSTRACT:
An graphics/audio controller system supports the delivery of digital audio signals in a graphics controller architecture so that much of the video circuitry can also be used to process audio information. The graphics/audio controller may be implemented to accommodate either asynchronous or synchronous audio access. A memory control unit is incorporated to receive audio and video data request signals and to correspondingly access the required data from a memory section. Digital audio and video signals are provided at an output bus of the memory section and are converted to analog signals by one or more digital to analog converters. As a result of the graphics/audio controller system, efficient audio reproduction is supported while minimizing hardware requirements. In addition, the overall size and cost of the system is minimized.
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patent: 5138500 (1992-08-01), Haikawa et al.
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Bartlett Niall M.
Koyama Ryo
Chan Wing F.
Chang Vivian W.
Guillot Robert O.
Hamrick Claude A. S.
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