direct digital interface 中文意思是什麼
direct digital interface
解釋
直接數位界面-
A common data acquisition card can be used on laboratory virtual instrument engineering workbench through designing the external interface between labview and common date acquisition card on the software design ; used the idea of the double buffer and direct memory access, a real time data acquisition and logging about the succession, big capacitance leakage current is realized ; a digital filter is designed to filter high frequency signals
在軟體設計上，設計了與普通數據採集卡的介面，實現了在labview環境中應用普通數據採集卡的功能；運用雙緩沖和內存直接映射的設計方法實現對連續、大容量泄漏電流信號的實時採集和存儲；設計了數字濾波器對採集后的原始數據濾去高頻干擾。 -
The configuration that uses ieee - 13 94 to control a vxi system is introduced. chapter 2 describes the resource manager application of message - based device 13 94 - vxi controller and the mechanism of register - based device arbitrary waveform generator ( awg ). the key technology of interface circuit and direct digital synthesis in awg module is discussed explicitly
本文先對vxi總線技術進行了概略的介紹，在此基礎上，對一具體的vxi寄存器基任意波形發生器模塊進行展開，介紹了任意波形發生器模塊與vxi機箱背板總線通訊的介面電路部分及波形發生機理的核心部分的直接數字合成技術。 -
Through " host direct boot " the monitor program and subroutine can be added or substituted during running. the interface and all digital logics are integrated into two cplds on the module. this simplifies the circuit and enhances its reliability
在電路硬體設計中，使用了現場可編程邏輯器件，將模塊介面、數字邏輯功能都集成到一、兩塊晶元中，簡化了電路，提高了可靠性。 -
After analyzing the characters windows system in graphic platform, at the same time describing how to use mirror driver in core mode realiz the screen sample. therefore, this paper introduce the character of usb controller chip cy7c68013. the system is a facility image processing system, which can direct link to usb interface and get the digital signal of various images from the computer. the outer device finish the image process
並在此基礎之上對闡述了如何通過內核模式下的鏡像驅動實現屏幕采樣，並介紹鏡像驅動實現的方法以及如何使用鏡像驅動來實現屏幕的高效采樣，對采樣得到的圖像系統進行了壓縮處理以適應usb的傳輸要求，壓縮程序將採集到的一幀幀圖像壓縮成為mpeg4的流數據。
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