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quantizer n.【自動化】數字轉換器,編碼器;量子化(變化)器。 a...

quantometer

The high entropy of the real and imaginary parts of sar raw data makes lossless - coding compression techniques unfit for sar raw data . in chapter 4 , some compression algorithms for sar raw data compression , such as baq , upq , bavq and wt - subbandcade are analyzed and discussed . an improved unrestricted polar quantizer ( upq ) , which can enhance the performance of the quantizer is put forward 第四章分別對塊自適應量化( baq )算法、非約束式極坐標量化( upq )算法、塊自適應矢量量化( bavq )算法和小波變換子帶編碼算法進行了分析和研究,并詳細討論了這些算法在工程實際中的應用。

The three - order modulator has a 2 - 1 cascaded structure and 1 - bit quantizer at the end of each stage , the modulator is implemented with fully differential switched - capacitor circuits . and then , the discussion will begin by exploring the design of various circuit blocks in the modulator in more detail , i . e . , ota , switched - capacitor integrator , quantizer , two - phase non - overlapping clock signal , etc . , at the same time , these circuits will be simulated in spectre and hspice . at last , the whole cascaded modulator will do behavioral level simulation by matlab soft and simulink toolbox 本論文中,首先介紹模數轉換器的各種參數的意義,以及一階sigma - delta調制器和高階sigma - delta調制器的原理;給出解決高階單環sigma - delta調制器不穩定性的方案,引入級聯結構調制器,特別針對級聯結構調制器中的失配和開關電容積分器的非理想特性進行詳細的討論;本設計的sigma - delta調制器采用2 - 1級聯結構和一位量化器,調制器采用全差分開關電容電路實現;同時對整個調制器的各個模塊進行了電路設計,包括跨導放大器、開關電容積分器、量化器、兩相非交疊時鐘等,并利用hspice和spectre仿真工具對這些電路進行仿真測試;最后,利用matlab軟件和simulink工具對整個級聯調制器進行行為級仿真。

In order to obtain a high - quality speech codec , the phase information of speech should be included in codec . in this thesis , a method for quantizing the phase of sew ( slowly evolving waveform ) and reconstructing sew ’ s phase with cubic polynomial interpolation is given based on the perceptual weighting analysis - by - synthesis ( a - b - s ) vector quantizer for the phase spectrum in wi coder 本文基于感覺加權相位譜分析合成( abs - analysis - by - synthesis )矢量量化方法,給出了一種wi編碼器中慢漸變波形( sew - slowlyevolvingwaveform )的相位信息量化及合成端相位的三次多項式插值重建方法。

The architecture and design methods of - modulators are studied . based on it , the bits of quantizer , oversampling - ratio and the orders of modulator have been designed 對調制器的結構和設計技術進行了研究,根據系統要求設計了量化器位數,調制器過采樣比和階數。

When using a fixed quantizer / quality mode the codec goes into ' imbecile - mode ' and just plainly encodes everything using a very simple set of rules 當使用一個固定的量化器/質量參數模式,編碼器將進入一種“低智商模式” ,只是平坦的使用一個簡單規則進行編碼。

Moreover , a predictive phase vector quantizer is proposed in this thesis based on the above method . the synthesis speech is slightly improved for female speakers 此外,本文在此基礎上提出了一種相位預測式矢量量化方案,使得女聲的語音合成質量有所改進。

Needless to say fixed quantizer / quality has very limited use for most of us 所以說定比特率編碼對我們的用處很小。

Vector quantizer designing based on robust statistic 基于穩健統計的矢量量化器設計算法

Optical quantizer scheme based on travel wave modulators 基于行波調制器的光量化器