pcm card 中文意思是什麼
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Terminal adapter. connecting equipment between the terminal equipment ( computer ) and the phone, e. g. a pcm / cia card. a ta may contain a phone book
終端適配器。用來連接終端設備（計算機）和無線電話，如pcm / cia卡， ta可能包括一個電話簿。 -
First introduces hardware platform of mine monitoring system that adopt embedded pcm - 3350 to be as main controller, big - capability memorizer cf card as memories, 10. 4 inch lcd liquid crystal screen as display, pcm - 3612 as communication extend cell ; rs232 and keyboard as i / o interface to realize data dispose, storage and transport function, and so on. then introduces some basic concept and core character about embedded operating system windows ce. at the same time, the paper has a detailed introduction about platform - configured tool platform builder of mbedded operating system windows ce and a detailed narration abut the whole process of configuring the embedded operating system base on yanhua pcm - 3350, then the paper depletes the characteristic function and system framework of embedded configuration software mcgs generally and introduces the design process about configuration software of mine monitoring - control system ; at last, the paper introduces main function of rk512 communication protocol that can ensure reliable communication with controller plc of bottom machine
首先介紹了硬體平臺的搭建：採用嵌入式pcm - 3350作為主控制器；大容量的存儲器cf卡作為存儲設備；採用10 . 4寸lcd液晶屏作為顯示設備； pcm - 3612作為通信擴展單元；用rs232和鍵盤作為i o介面來實現數據的處理、存儲和傳輸等功能；然後又介紹了嵌入式操作系統windowsce的一些基本概念、核心特性，同時對嵌入式操作系統windowsce的平臺定製工具platformbuilder做了一些介紹並詳細敘述了使用platformbuilder定製基於研華pcm - 3350的windowsce操作系統的過程；接著概括敘述了可運行在windowsce上的嵌入版組態軟體mcgs的特點、功能、體系結構並詳細介紹了礦山檢測系統的組態軟體設計過程；最後介紹了能夠與下位控制器plc可靠通訊的rk512通訊協議的主要函數。 -
At last the audio - visual filter can get and regroup the pcm audio data which transformed into the time - frequency signals by the fft. at the same time the power spectrum can be displaying on the windows by using the win32 api functions. finally the test of this system shows the processes about transport stream of receiving in the collecting card, pushing in the bridge, separating in the parser, displaying in the audio - visual filter are satisfied with the data rata at the server
音視頻效果filter內部通過獲取解碼后的pcm格式數據，並利用緩沖管理器對這些數據進行重新分組，然後對分組后的數據進行fft變換將時域信號變換到頻域之中，同時對變換后的數據作數學處理后得到其功率值，最後利用api畫圖函數對這些功率值進行了實時的特殊效果顯示。 -
2g : in 1989, two technologies from the " world of sound studio " are combined on a pc expansion card for the first time : fm synthesis made famous by yamaha synthesizers and 8 - bit pcm pulse code modulation at 11. 25 khz. for a long time, " soundblaster " becomes synonymous with the term sound card, and the first step toward the pc as " multimedia machine " was taken
11989年，兩項由world of sound studio發展出來的新科技首次被結合在個人電腦的擴充卡上：因為yamaha音源合成器以及8 - bit pcm pulse code modulation at 11 . 25 khz的興起，使得fm音源成為這時期的主流，使用fm音源的聲卡聲霸卡soundblaster幾乎成了該產品的代名詞。
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