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The Engineering Toolbar
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Video RAM (VRAM)
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Video RAM (VRAM) is a dual-port RAM used in video accelerator cards and on motherboards that incorporate video technology. VRAM stores the pixel values in a graphical display. To refresh the display, the board's controller reads from VRAM continuously. Unlike SRAM and DRAM, video RAM provides two access points to each memory cell. One port is used to refresh the display and the other is used to change the data to display. This dual-port system results in a doubling of bandwidth and faster video performance. Products & Services
Memory modules are computer chips used to add memory to a computer.
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SRAM modules are collections of static random access memory (SRAM) chips assembled on circuit boards.
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Video cards are used to regulate the data displayed on computer monitors.
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Memory chips are internal storage areas in computers. Although the term “memory chip” commonly refers to a computer's random access memory (RAM), this product area includes many different types of electronic data storage. Computer memory stores data electronically in cells. Without memory chips, a computer could not read programs or retain data.
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Video processor boards are used to process video, medical imaging, automated optical inspection, and other related activities. They can be fitted with between one and a thousand digital signal processing (DSP) units in order to increase the computing power of the board.
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Topics of Interest
Synchronous graphics RAM (SGRAM) is a single-port RAM used primarily with video accelerator cards. To improve performance, a dual-bank feature opens two memory pages simultaneously. SGRAM is used in...
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Static RAM (SRAM) is more expensive than DRAM, but faster and more reliable. Unlike DRAM, SRAM does not need to be refreshed constantly; SRAM is refreshed only when a write command is performed. SRAM...
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Cache is a special memory subsystem in which frequently used data values are duplicated for quick access. A memory cache stores the contents of frequently accessed RAM locations and the addresses...
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6.5 Enhancement of Video Performance
When conventional LCD desktop monitors and notebook panels are used to display video from a DVD, for example, the image quality is inferior to that on a CRT.
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Overview
In addition to encoding and decoding MPEG, NTSC/PAL and many other types of video, a typical system usually requires considerable additional video processing.
Since many consumer...
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