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VPU—Evolution of an acronym

In 1992, Pixel, a subsidiary of Circus Logic, introduced two new digital video chips, the CL-PX2070 and CL-PX2080. Those chips were the most sophisticated and complex chips for multimedia and video applications we had seen and were designed to process and display multiple streams of full motion video at the same time. The PX2070 had four major functional units: the ...

Jon Peddie

In 1992, Pixel, a subsidiary of Circus Logic, introduced two new digital video chips, the CL-PX2070 and CL-PX2080. Those chips were the most sophisticated and complex chips for multimedia and video applications we had seen and were designed to process and display multiple streams of full motion video at the same time. The PX2070 had four major functional units: the HIU—host interface unit, VBU—video bus unit, RFU—reference frame unit, and the  VPU—video processing unit. The VPU was a field-oriented signal processor and did YCbCr and RGB input stream format conversion, color space conversion, data tagging, three channel LUT operations, horizontal
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