adpcm 中文意思是什麼
adpcm
解釋
自適應差分式脈沖編碼調制-
Adaptive differential pulse code modulation adpcm
自適應差分脈沖編碼調制 -
Adpcm adaptive digital pulse code modulation
自適應數字脈沖編碼調制 -
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。 -
Adpcm : adaptive differential ulse code modulation
自適應差分脈沖編碼調 -
Adpcm digital circuit multiplication equipment using adpcm and dsi
使用自適應差分脈沖編碼調制 -
The adaptation processing includes linear prediction coefficient adaptation and adaptation of quantization step size for residual signals. based on g. 726, we adopt a huffman coder to make use of probability statistic of bit cascade covering n ( n 1 ) samples generated from adpcm, in order to further reduce the bit rate. ng is lossless entropy coding, the speech quality of our improved algorithm should be same as that of g. 726 standard
我們的研究和改進工作包括:研究最優非均勻自適應量化器，及其自適應演算法;研究波形預測函數，以及函數零點、極點的自適應演算法;基於每n （ n 1 ）個樣本所對應符號的概率統計，對預測殘差量化值再進行huffman編碼，進一步降低比特率。 -
Using an 8 - depth async fifo solves the synchronization and exchange of data be - tween different clock domains. the data transaction protocol comes from the most basic work way of uart. when the master clock is 16. 7mhz, the pcm side and adpcm side clocks both are 2. 38mhz, the results of simulation show that the latency from the start - bit of pcm data inputting uart receiver to the stop - bit of adpcm data outputted uart transmitter is 14. 3 us and the latency from the start - bit of adpcm data inputting uart receiver to the stop - bit of pcm data outputted uart transmitter is 14. 7 us
在主時鐘為16 . 7mhz ， pcm數據端與adpcm數據端時鐘均為2 . 38mhz時，模擬結果表明從pcm的起始位輸入uart接收器到adpcm終止位輸出uart發送器的最大延遲為14 . 3 s ，從adpcm的起始位輸入uart的接收器到pcm終止位輸出uart發送器的最大延遲為14 . 7 s ，設計時盡可能的使編碼與解碼的時間相差不多，從結果看出基本達到這個要求。 -
The system is mainly composed of adpcm encoder / decoder and embeded system card based on arm7 processor
該系統主要是由硬體adpcm編解碼卡和嵌入式arm7以太網傳輸卡構成。 -
Informal subjective a / b listening tests indicated that the reconstructed speech quality of the improved wi codec with unquantized parameters is a little better than that of itu g. 726 32kbps adpcm coder
非正式的a b測試表明，改進的wi演算法的模型質量好於itu32kbpsg . 726標準。 -
In which adpcm is responsible for the audio signal ' s encoding / decoding and processing, and the latter is responsible for ip packing and unpacking
前者用於語音的編解碼和信令提取，信令不單獨佔用帶寬；後者負責碼流的ip封裝和解封裝。 -
The speech quality produced by g. 729a is equivalent to that of 32kbits / s adpcm for most operating conditions, achieving the request of long - distance telephone
G . 729a具有非常好的性能，其語音質量與32kbit / s自適應差分脈沖編碼調制（ adpcm ）演算法相當，達到了長途電話質量要求。 -
This article introduce a method to integrated following functions in a single module : dtmf / mfc codec, 2 : 1 adpcm speech codec, ivr, recorder, telephone conference, all these could work simultaneously in 32 channels
本文提出了一種方案，可以在一個模塊上實現32路dtmf / mfc信號的接收、發送， adpcm語音壓縮解壓縮、 ivr 、錄音，電話會議。 -
Subjective testing indicates that the quality of cs - acelp is equivalent to that of the 32kbit / s adaptive differential pulse code modulation ( adpcm ) under error - free conditions and it outperforms g. 726 under error condition. in this paper, standard c is adopted in realization of the algorithm, presents program strategies and steps of algorithm of each module. the coder and decoder is tested by utterances with noise
用標準c語言模擬實現了該演算法，計算了mos分值，女聲： 4 . 180497 ，男聲： 4 . 199782 ，並在相同的測試語句中加入噪聲進行測試，含噪語句通過該編解碼器，輸出的合成語音用主、客觀評價標準評價，與原始不含噪語音效果差別不大，平均mos分值為：女聲4 . 1375 ，男聲4 . 1668 ，說明該演算法是優秀的編解碼演算法。 -
The speech quality produced by g. 729a is equivalent to that of 32 kb / s adpcm for most operating conditions, achieving the request of long - distance telephone. these conditions include channel errors, multiple encodings
729a具有非常好的性能，其語音質量與32kb s自適應差分脈沖編碼調制（ adpcm ）演算法相當，達到了長途電話質量要求，在有隨機比特誤碼、發生幀丟失和多次轉接等情況下有很好的穩健性。
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