quantization noise 中文意思是什麼

quantization noise 解釋
量化畸變
  • quantization : 分層量子化把連續量轉換為數字
  • noise : n 1 聲音，聲響。2 叫喊；嘈雜聲，噪音；喧鬧聲；吵鬧，騷動，騷擾。3 〈古語〉謠言，風聲。4 〈美國〉...
  1. Quantization noise occurs when the bit number is too small

    在比特數過少時會產生量化噪聲。
  2. Sigma - delta modulator, combined with oversampling, effectively attenuate the in - band quantization noise in the output signal and enhance the signal - to - noise ratio ( snr ) through the shaping of the quantization error

    調制器與過采樣相結合，對量化誤差噪聲進行整形，有效衰減輸出信號的帶內量化噪聲，提高了輸出帶內信噪比（ snr ） 。
  3. 36 covers the fundamentals of digital communications and networking, including the basics of information theory, sampling and quantization, coding, modulation, signal detection and system performance in the presence of noise

    36包含數位通訊和網路基礎，其中計有基本的資訊理論、取樣及量化、編碼、調變、訊號偵測及有雜訊時的系統效能。
  4. Frequency response, quantization noise, reconstruction error and its sensitivity to mismatch among adcs are studied at length in prqmf banks adc system, and the theoretic results include : ( 1 ) the distortion / aliasing functions of hybrid filter banks adc system is similar with that of switch capacitor filter banks adc system ; ( 2 ) for wide or narrow band input signal, the effective resolution of the two adc systems is 0. 51og2m bits higher than their adc ; ( 3 ) reconstruction error ' s sensitivity to mismatch among adcs of the two adc systems is reduced effectively than time interleaved adc system

    2對prqmf濾波器組adc系統的頻響、量化噪聲特性、重建誤差特性以及重建誤差對adc間的失配敏感性進行了理論分析研究，所得到的理論結果為： （ 1 ）混合濾波器組adc系統與開關電容濾波器組adc系統的失真/混迭函數一致； （ 2 ）無論輸入寬帶還是窄帶信號，這兩種adc系統的有效解析度均比其adc提高了0 . 5log _ 2m比特； （ 3 ）這兩種adc系統的重建誤差對其adc間的失配敏感性均明顯低於時間交織adc系統。
  5. In this paper, optic gyro is viewed as the object of investigation and several aspects is investigated as follows. two important indexes - bias instability and scale factor were measured and investigated, including bias, its repetitiveness, temperature sensitivity, random walk coefficient and scale factor, its nonlinearity, asymmetry, repetitiveness. we make use of the allan variance method to separate the noise factors which affect the performance of the optic gyro, such as the angle random walk, bias instability, rate random walk, rate ramp, quantization noise, markov noise and sinusoidal noise

    本文以光學陀螺為研究對象，開展了以下幾方面的研究工作：本文對光學陀螺性能的兩個重要指標?標度因數和零偏穩定性進行了較為詳細的研究，其中包括陀螺的零偏b _ 0 、零偏重復性b _ r 、零偏溫度靈敏度b _ t 、隨機遊走系數rwc和標度因數k 、標度因數的非線性k _ n 、標度因數不對稱性k _ h 、標度因數重復性k _ r等等。
  6. The content mainly involved in the image pre - processing, which includes de - noise and registration on the live image sequence and the mask image, the digital subtraction arithmetic and the image post - processing, which includes the image quantization and enhancement

    內容主要涉及數字剪影中造影片序列和蒙片的預處理，包括降噪和配準，數字剪影演算法研究以及數字剪影圖象序列的后處理，包括量化和增強共五個部分。
  7. An analysis of quantization noise in fm transmitter at intermediate offset frequencies

    對調頻發射機在中頻偏移下的量化噪聲分析
  8. Dithering, which adds white noise to the input analog signals, may be used to reduce quantization noise

    在輸入模擬信號中加入白噪聲，即抖動，可以降低量化噪聲。
  9. Furthermore, result of quantization noise shows that the effective resolution is 0. 51og2m bits higher than its adc in the adc system

    此外，高效混合電子科技大學博士論文濾波器組adc系統的量化噪聲研究結果表明其有效解析度比其adc提高0 . 51ogzm比特。
  10. But the most common noise is angle random walk, bias instability, rate random walk, rate ramp and quantization noise. in this paper, the random error model including the most common five noise as above

    對常見的五種噪聲因素包括角度隨機遊走、零偏穩定性、速率隨機遊走、速率斜坡和量化噪聲建立了陀螺隨機誤差模型。
  11. Unsatisfactory lower resolutions are prone to cause a damaging loss of sound quality, referred to as quantization noise

    不合格的低解析度很容易損害音質，這就是量化噪音。
  12. We present an image - hiding cryptosystem based on vector quantization and wavelet transform. the key information of secret image is encrypted and then hidden into another image, which can be publicly accessed. in the paper, we compress the key image information using vector quantization, and apply wavelet transform method in compressing and noise - removing to improve the image quality

    論文中，使用矢量量化的方法大大壓縮了保密信息的數據量，並將圖像的小波變換應用在圖像的前期壓縮和後期去噪聲的過程中，提高了壓縮比，增強了明圖的偽裝性，減少了運算時間，優化了解密圖像的效果。
  13. In the thesis, we select the mel - frequency cepstrum coefficients based on analyzing a lot of parameters of speech signal. mel cepstrum is of better recognition and anti - noise capability. ( 2 ) dynamic time warping, vector quantization, hidden markov model and artificial neural network can be used in speaker recognition

    （ 2 ）現有的說話人識別方法有動態時間規整法、矢量量化法、隱馬爾可夫模型和神經網路法等，其中hmm已成為目前最佳的說話人識別處理模型。
  14. In this dissertation, psychoacoustic models filter banks quantization and bit allocation predicate coding and temporary noise shaping is analyzed

    本文首先對心理聲學模型、濾波器組、量化和比特分配、預測編碼、時域噪聲成型等技術進行研究。
  15. Least square method is used to eliminate linearity errors of system as result of asymmetric illumination and fitting. averaging method of neighborhood and medium filtering method are used to effectively overcome thermionic noise as result of courses of image transferring, gathering and quantization and so on

    對由於光照不均以及安裝等存在的系統線性誤差，採用最小二乘法線性擬合加以消除；對由於圖像採集、傳輸、量化過程中產生的熱電子噪聲，利用了鄰域平均和加權中值濾波方法來有效地減小。
  16. It is a pop method to embed watermark in frequency field, in most literature, they embed watermark into the coefficients of fft, dct, or high - frequency of dwt using quantization method, we think that : embedding watermark into the low - frequency of audio signal dwt field can improve the robustness of watermark. the watermark is embedded in the maximum of subsection of approximate component the watermark signal using quantization method, for the same quantization size, the “ noise ” added to the signal is

    在頻率域嵌入水印信息，是目前一種主流的嵌入演算法，在很多文獻中，都是通過量化音頻信號的ftf系數， dct系數，或者是dwt域的高頻系數。我們認為:在小波域內的近似分量（低頻系數）中嵌入水印能夠提高數字水印的魯棒性，通過量化嵌入水印的方法，將水印嵌入到近似分量中每個分段中最大值上，因為這樣對于同一個量化步長，量化對象的幅值越大，所疊加的「噪聲」就越小，從而提高了數字水印的不可感知性。
  17. The result of simulation implied that this calculation can keep not only the better audio quality, but also has the better robustness for the attacks such as : noise addition, lossy compression, low pass filtering and re - quantization

    模擬實驗結果表明本演算法不僅能保持較好的音質，而且對諸如疊加噪聲，有損壓縮，低通濾波，重新采樣等攻擊都具有較好的魯棒性。
  18. The embedded bw also successfully survives cropping, filtering, noise and multi - watermarking etc. the new ideas the thesis proposed are : first, frequency - based watermarking idea using toral automorphisms is really a novel one, although, in the literature, there are some waterniarking schemes using toral autpmorphisms, all of which are based on space ; second, some improvements of the quantization function contribute to the algorithm ' s performances to some degree

    另外該演算法對圖象裁剪、濾波、噪聲和多重水印處理等都具有較強的魯棒性。本文提出了兩個新思想：第一，雖然現有文獻已經提出了利用環形自同構映射的數字水印處理演算法，但這種演算法是基於空域的，而利用環形自同構映射基於頻域的水印處理演算法，目前文獻上未見報道。
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