比特失真 的英文怎麼說

中文拼音 [bǐtèshīzhēn]
比特失真 英文
bit distortion
  • 比 : Ⅰ動詞1 （比較; 較量高下、 長短、距離、好壞等） compare; compete; contrast; match; emulate 2 （比...
  • 特 : Ⅰ形容詞（特殊; 超出一般） particular; special; exceptional; unusual Ⅱ副詞1 （特別） especially; v...
  • 真 : Ⅰ形容詞（真實） true; genuine; real Ⅱ副詞1 （的確; 實在） really; truly; indeed 2 （清楚確實） cl...
  • 比特 : [計算機] bit （信息量單位）比特波形 bit pattern; 比特差錯率 bit error rate [probability]; 比特緩...
  1. The emphasis of this thesis is studying the methods of bit allocations of digital image compression based on wavelet transform and managing to minimizing the overall distortion. we know from the rate - distortion theory that the aim is gainable

    由率失真理論我們知道，對于給定的碼率，可以找到一種比特分配演算法對小波變換后的各個子帶進行比特分配，使重建圖像的失真達到最小。
  2. The hydrauli c model of gradual dike - break simulates numerically the 2 - d flow of gradual dike - break waves. it shows the variation of flow field on breach, and the complicated flow characteristic of the propagation, diffraction, reflection and deformation of the dike - break waves. the hydraulic model can realistically simulate the burst process of dike, and computational accuracy is satisfied with the engineering demands

    本文建立逐漸潰堤的水力模型首次對二維逐漸潰堤波的流動問題進行了數值研究，揭示了逐漸潰堤過程中潰口處流場的變化情況，以及潰堤波的傳播、繞射、反射及變形的復雜運動特徵，能較好地模擬實際工程中的潰堤失事，模擬比較逼近於真實潰決過程，計算精度可滿足工程要求。
  3. By using kinds of quantization tables, each quantization can work at kinds of rates

    一種優秀的比特分配演算法可使最終的量化失真達到最小。
  4. In a word, bit allocation is the method deciding how to allocate definite bits to a variety of subbands

    一種優秀的比特分配演算法可使最終的量化失真達到最小。
  5. In packet based wireless video communications, when best band distribution, not only source distortion should be considered, but also channel distortion caused by channel errors. the existing macroblock - layer rate control schemes calculates quantization parameters of all macroblocks ( mb ) in a frame in a raster scan order, and then encodes the mbs in the same order. actually, the quantization distortion is heavily dependent upon the coding order of mbs

    在基於包的無線視頻傳輸中，最佳帶寬分配時，不僅要考慮信源編碼失真，也要考慮由於通道差錯引起的通道失真；已有的宏塊層碼率控制演算法以矩陣掃描的順序計算一幀中所有宏塊的量化參數，事實上量化失真與宏塊的編碼順序有很大關系，改變宏塊的編碼順序，使復雜的宏塊分配到更多的比特數，顯然能大大提高編碼效率。
  6. The relays may lack the high speed switching characteristic of the solid - state state switches used by other preamplifiers, but they also have none semiconductor distortions and noise which accompany analog gates and voltage controlled amplifiers

    與其他前級放大器所用的半導體開關相比，這些繼電器缺少高速轉換的特性，但它們沒有隨著模擬開關和電壓控制放大器所帶來的半導體失真和噪聲。
  7. The research important point of this thesis as follows : the first is to generalize the importance of administrative communication and its current insufficient performance, the trend of administrative communication and information distortion caused by e - government. speak up from the certain meaning, the administration activity is a continuous communicative process. only passed the communication, then can the administration activity go on wheel, then can the administration target attain. but information distortion of the administrative communication has constituted huger threat than before to our nation, society, organization. the second, investigating several typical information distortion phenomena in the course of administrative communication, which includes information distortion caused by media coverage, information distortion brought about by intrinsic

    本文堅持以辯證唯物主義和歷史唯物主義為指導，採用比較研究、制度研究、邏輯分析等，對行政溝通發展趨勢及信息失真的危害性進行了分析，透視溝通失真的現象來剖析其原因，提出降低行政溝通信息失真的思路，並試圖探索構建適合行政溝通發展趨勢的電子政務溝通模式，構建過程中以行政溝通理論和信息不對稱理論為支撐，結合行政溝通自身的特點和我國行政實際，對防止行政溝通信息失真現象的出現進行的探索性思考，並提出了具有建設性的措施。
  8. 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。
  9. In this dissertation, researching from the basic concept of large signal network analysis, we discuss the measurement theory and technology of rf network nonlinearity and the characterization technology of intermodulation distortion in detail, and analyse some nonlinear characteristic excited with a one tone or multi - tone, such as am - am, harmonic distortion, intermodulation distortion, adjacent channel power ratio and how to qualitatively analyse nonlinearity of rf network to make the measurement and calibration

    本課題從大信號網路分析的基本概念出發，詳細討論了射頻網路非線性的測量理論和技術以及互調失真表徵技術，分析了在單頻音和多頻音信號激勵下的一些非線性特性，如am - am ， am - pm ，諧波失真，互調失真（ imd ）和臨近通道功率比（ acpr ）等，以及根據包絡域方法定性地分析射頻微波網路的非線性特性，以此來進行射頻網路的非線性測量和校準。
  10. In communication systems like this, on account of nonlinearity which may arouse intermodulation of power amplifier may bringing the increaseing of ber because interferes from adjacent channel. hence, we did the analysis of relationship between im3 and ber in the system

    但是在正是因為採取這種調制方式，由於功率放大器的（ pa ）非線性失真會引起交調效應產生同頻及鄰頻通道的干擾而使誤比特率（ ber ）增加。
  11. The time base drift deduced by the change of temperature is discussed particularly and the compensation method of it is analyzed. finally, we also studied frequency band extension under time base distortion condition by simulation. the results show that the compensation of time base distortion can reduce the error of signal and then increase the accuracy of frequency band extension

    首先，介紹時基失真的相關概念及其對測量信號的影響；其次，對時基失真特性測量的不同方法進行了理論分析和比較，並對分析信號法進行了模擬研究；再次，對時基失真的補償方法進行分析和模擬研究；並專門對溫度變化引起的時基漂移及其補償方法進行了簡要分析；最後，對時基失真條件下的頻帶展寬技術的模擬表明時基失真的補償可以減小信號的誤差，因而提高頻帶展寬的精度。
  12. Unfortunately, in these situations, the notorious blocking artifacts resulting from block dct set a severe limit on the achievable bit - rate with acceptable quality

    然而，基於dct的傳統視頻壓縮方法由於在低比特率下出現塊失真嚴重影響恢復視頻質量。
  13. Then, based on the summarization and evaluation of the fruits and shortage other scholars made, this paper brings forward the research hypotheses. on the base of fully understanding of various research models of value relevance, this paper chooses the feltham - ohlson model and the balance sheet model as the basic mod els and adjusts the two models to test the value relevance of accounting data of listed a share corporations in china. the research result shows : ( 1 ) in the period from 1996 to 2001 the value relevance of accounting information in china is falling with the implementation and changing of every financial accounting standard ; ( 2 ) when testing listed corporations suffering loss the feltham - ohlson model is invalid ; ( 3 ) compared with 2000, the accounting data of 2001 is n ' t more conservative but more aggressive ; and ( 4 ) this paper ca n ' t judge whether the book value of corporation assets after computing the asset reduction required by " accounting regulation of corporations " is closer to that before computing, and it needs further researching

    在對各種價值相關研究模型充分理解的基礎上，本文有針對性地選擇feltham - ohlson模型和資產負債表模型作為研究的基本模型，並根據所研究的具體問題對模型進行了修正，用以檢驗我國a股上市公司會計數據的價值相關性，研究結論如下： 1 、 1996 2001年我國會計信息的價值相關性沒有隨各項具體會計準則的頒布和變更逐年提高，反而逐年降低； 2 、 feltham - ohlson模型在檢驗虧損上市公司時失效，這可能是我國資本市場中特有因素造成的； 3 、與2000年相比， 2001年會計數據不但沒有更謹慎，反而更「激進」 ； 4 、本文檢驗結果無法判斷計提《企業會計制度》新要求的四項資產減值準備后計算出的企業資產帳面價值是否比未計提資產減值準備計算出的資產帳面價值更接近企業真實的經濟價值，有待今後做進一步的研究。
  14. The nonlinear influence on multiple carriers signal, such as am / am and am / pm conversion, has been analyzed in this paper. some common linearization techniques, such as feedback, feed - forward and pre - distortion, have also been introduced and compared, which shows that feed - forward is the preferred linearization approach for application in this paper

    本文分析了微波功率放大器的非線性特性，特別是am / am轉換和am / pm轉換對多載波信號的影響，也介紹了反饋、前饋、預失真等各種常用線性化技術的基本原理，並對它們的優缺點進行了比較總結。
  15. The difference of the two methods is that the first is in the position of convex rate - distortion and the second is in the position of arbitrary rate - distortion curve

    這兩種比特分配演算法的差別在於，第一種是在率失真曲線是下凸的情況下進行的，這種方法演算法是以率失真曲線的斜率為基礎的。
  16. Considering the large numbers of the ecg data, the author analyzes the methods on compression of ecg singnal. in this paper, the method is based on wavelet transform and adaptive coding. it can obtain better compression ratio and reflect the accurate detail of original signal

    本文還針對心電數據量大的特點，對心電信號壓縮方法進行了探討，採用小波系數自適應壓縮方法對心電信號進行了壓縮，取得了較好的壓縮比，並具有重構信號失真小的特點。
  17. In the third part, the essences of steganography and disadvanges of common visual perception evaluation, such as psnr and wpsnr are studied. based on analysis local error that is introduced by embedding information, combining hvs, three objective perception evaluation method for steganography performance are proposed, which are based on human visual systems and local statistic error distribution respectively. in the steganalysis part, a steganography security statistic attack model and methods for some steganography methods are presented

    在信息隱藏的性能評價方面，研究了常用的峰值信噪比，加權峰值信噪比等前人提出的感知性能評價準則，指出針對信息隱藏的性能評價不能單純從視覺特性出發，提出從信息隱藏的數據特性和感知特性出發，結合局部特性來考察失真誤差的變化的思想，並據此提出基於局部區域誤差統計分佈和視覺掩模方法評價信息隱藏性能的方法。
  18. This paper proposes a two - armed push - pull inverter, including its topologies, power distributions in every switching devices and modulation schemes. the major parameters such as thd and df of this vsi are analyzed. comparison study shows that the quality of two - armed push - pull vsi is better than those of square - wave vsi. and the switching loss is lower than that of pwm scheme at same time, especially used in wide frequency range. detailed calculating formulae and experimental results are presented

    該文介紹了一種雙臂推挽式逆變器，包括其電路拓撲、每個開關器件的功率分佈和調制策略.分析了這種電壓源逆變器的主要參數，如總諧波失真度（ thd ）和失真指數（ df ） .比較研究表明，這種逆變器的質量明顯優于方波逆變器，同時開關損耗明顯低於pwm調制方式，特別適用於寬頻范圍.介紹了計算公式和實驗結果
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