pcm signal 中文意思是什麼

pcm signal 解釋
脈碼燈信號
  • pcm : 北美的
  • signal : n 1 信號，暗號；信號器。2 動機，導火線 （for）。3 預兆，徵象。adj 1 暗號的，作信號用的。2 顯著的...
  1. The voice recording instrument adopts 8bit pcm and 4bit adpcm voice coding and decoding mode, can record the eight - channel voice signal simultaneously. it can save the recorded data in the flash memory or in the pc through the ethernet. the recorded voice signal data also can be played back

    該語音記錄儀採用8位pcm或4位adpcm語音編解碼方式工作，可實現8路音頻輸入信號同時錄音;能夠將錄制的數字語音數據存儲在nand型flash中或通過以太網介面上傳到pc機存儲;能夠將錄制的數字語音數據進行回放。
  2. At the receiving end, a inverse process is performed. the system receives low rate data and the fpga reorganizes a frame of data which is decoded by the compression chip every 20 ms. the obtained pcm signal is performed d / a to restore the analog speech signal

    在收端進行相反的過程，接收低碼率數據，並由fpga重新組幀，送至主晶元解碼得到pcm信號，再作d / a變換，恢復出模擬語音，系統是全雙工的。
  3. The main subject including : the constructure of this mpeg2 encoder ; ~ the principle and the system of tv, also the determination of tv signal ? pcm parameter and the international standard of video pcm ; ? he protocol of pci and the driver of pci device ; the hardware & software design of some corresponding interfaces of mpeg2 encoder, allowing for the working condition, there is some discussing on programming of mater control ; debugging and testing

    主要內容包括： mpeg2編碼器的體系結構；電視原理、制式以及電視信號的pcm編碼參數的選擇和pcm編碼的國際標準； pci總線協議標準及pci設備驅動程序的編寫； mpeg2編碼器的相關介面的具體硬體設計和相應的軟體設計，結合具體情況，討論了主控編程；硬體調試。
  4. The difficulties of the text are the use of the integrated dtmf receiver mt8870 and the signal generator circuit. their realities need occupy the pcm timeslots. they are the characters of the digital program controlled exchange

    尤其對于收號器mt8870的使用、信號音的產生電路是本設計的難點，具有數字程式控制交換的特點，需要佔用pcm時隙來完成其功能。
  5. We made an improvement in overcoming the defects in speech signal adaptive delta modulation ( abbr. adm ), such as slope overloading and grain noise. in this method, numerical sliding average filtering was used for filtering decoding speech signal. experiments and analyses indicate that the method makes waveforms in good agreement between the decoding of adm and the original pulse coding modulation ( abbr. pcm ) signal, and considerably improves, the playback speech quality in naturalness, legibility and under standability

    針對語音信號自適應增量調制（ adm ）方式中斜率過載和顆粒噪聲缺點，提出了一種改進方法，它利用滑動平均方法對解碼后的信號進行數字濾波.試驗和分析表明，該方法使解碼后的信號波形與原脈沖編碼調制（ pcm ）波形具有很好的一致性，使再生語音質量在自然度、清晰度和可懂度方面比改進前均有較大提高
  6. This paper discusses the hardware system architecture of broadband software radio experiment platform, designs hardware circuit system, studies the basic theory of software radio deeply, establishes the mathematical model. the platform is made up of a / d ( ad6640 12bit 65 msps ), orthogonality transform, digital filtering and dsp, etc. the platform can demodulate pcm - am / fm / pm / ask / fsk / psk / qpsk, pcm - cdma - psk, pcm - qpsk signal

    本文論述了寬帶軟體無線電接收實驗平臺硬體系統的體系結構，設計了硬體電路系統，深入研究了軟體無線電的基本理論，建立了接收實驗平臺的數學模型。該平臺由高速a d變換器（ ad664012位65msps ） 、正交變換、數字濾波器、 dsp等部分構成。實現了pcm - am fm pm ask fsk psk qpsk ， pcm - cdma - psk qpsk調制方式的解調功能。
  7. Aiming at the present problems, this thesis studies the pd signal extraction of pulse current method （ pcm ） in two directions : signal propagation and interference suppression

    本文針對現存的問題，從局放信號的傳播和干擾的抑制兩方面研究了脈沖電流法用於變壓器局部放電在線監測。
  8. The system adopts an advanced specific speech compression chip based on ambe algorithm. it can achieve high compression rate at 4 kb / s. the system first performs a / d conversion on analog speech input to obtain pcm signal and the pcm signal was encoded by the main compression chip

    它採用了比較先進的基於ambe演算法的專用語音壓縮編/解碼晶元，壓縮率高，可以將數字語音信號碼率壓縮至4kb / s ，且編碼速率可通過修改控製程序選擇。
  9. In this paper, the method of in - bore abnormal phenomenon remote detecting is presented. considering of the multi - channel transient signals automatic acquisition, a project of pcm signal hardwire transmission data automatic acquire system is put forward. in this system, a pcm demodulate board is designed, it can decode the pcm code string which contain the information of the multi - channel transient signals, it also can catch the useful data automatically, and transmit these data to upper pc by rs485

    在該系統中，為了能夠解調出包含多路動態信號數據的高碼速率pcm信號，設計並製作了一種適用的pcm解調板，能夠從pcm碼流中恢復出位時鐘信號，從而與發送端保持位同步和幀同步，從而對pcm碼流可靠地解調、緩存，並能根據計算機設定的觸發條件自動地捕獲多路信號的有效段，然後利用rs485總線將這些數據可靠地遠傳至計算機以供顯示、分析和保存。
  10. Pcm is a important method used to convert an analog signal into a digital one

    Pcm是用以將模擬信號轉換成數字信號的一種重要方法。
分享友人
分享到 Line

分享到臉書