Optical quantizer scheme based on travel wave modulators 基于行波調(diào)制器的光量化器
Vector quantizer designing based on robust statistic 基于穩(wěn)健統(tǒng)計的矢量量化器設(shè)計算法
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。
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(chǔ)上提出了一種相位預(yù)測式矢量量化方案,使得女聲的語音合成質(zhì)量有所改進(jìn)。
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(dāng)使用一個固定的量化器/質(zhì)量參數(shù)模式,編碼器將進(jìn)入一種“低智商模式” ,只是平坦的使用一個簡單規(guī)則進(jìn)行編碼。
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(diào)制器的結(jié)構(gòu)和設(shè)計技術(shù)進(jìn)行了研究,根據(jù)系統(tǒng)要求設(shè)計了量化器位數(shù),調(diào)制器過采樣比和階數(shù)。
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(quán)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(xiàng)式插值重建方法。
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(shù)轉(zhuǎn)換器的各種參數(shù)的意義,以及一階sigma - delta調(diào)制器和高階sigma - delta調(diào)制器的原理;給出解決高階單環(huán)sigma - delta調(diào)制器不穩(wěn)定性的方案,引入級聯(lián)結(jié)構(gòu)調(diào)制器,特別針對級聯(lián)結(jié)構(gòu)調(diào)制器中的失配和開關(guān)電容積分器的非理想特性進(jìn)行詳細(xì)的討論;本設(shè)計的sigma - delta調(diào)制器采用2 - 1級聯(lián)結(jié)構(gòu)和一位量化器,調(diào)制器采用全差分開關(guān)電容電路實(shí)現(xiàn);同時對整個調(diào)制器的各個模塊進(jìn)行了電路設(shè)計,包括跨導(dǎo)放大器、開關(guān)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(jìn)行仿真測試;最后,利用matlab軟件和simulink工具對整個級聯(lián)調(diào)制器進(jìn)行行為級仿真。
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(yīng)量化( baq )算法、非約束式極坐標(biāo)量化( upq )算法、塊自適應(yīng)矢量量化( bavq )算法和小波變換子帶編碼算法進(jìn)行了分析和研究,并詳細(xì)討論了這些算法在工程實(shí)際中的應(yīng)用。