But there is obvious " block noise " in this transform coding method useing dct . and it is difficult to improve the compression performance 然而利用dct作為主要技術(shù)的變換編碼方法存在著明顯的方塊效應(yīng),而且進(jìn)一步提高壓縮性能很困難。
Some practical problems in software implementation of zh - transform based shape coding method and some effort to improve the method are also discussed in this paper 在本文的最后,還討論了算法實(shí)現(xiàn)中的一些具體問題,嘗試了對(duì)算法的各種改進(jìn)措施。
The experimental results show that c2dvlc can gain 0 . 34db in average for the tested videos when compared with the traditional 2d - vlc coding method like that used in mpeg - 2 雖然算術(shù)編碼器的編碼效率高,但由于其實(shí)現(xiàn)復(fù)雜代價(jià)高,這限制了其廣泛應(yīng)用。
( 2 ) aiming at the discrete structure of composite shells , this thesis proposes two integer coding method , then uses one of them to optimize composite shells ( 2 )針對(duì)復(fù)合材料層合殼的離散型優(yōu)化特點(diǎn),提出兩種整數(shù)型編碼方式來表征層合殼結(jié)構(gòu)參數(shù)。
The principle and method to implement are introduced and finally , the feasibility of the dynamic adaptive coding method is testified by an application example 文仲介紹了視頻數(shù)據(jù)動(dòng)態(tài)適應(yīng)壓縮編碼的原理與實(shí)現(xiàn)方法,并通過具體應(yīng)用實(shí)例,驗(yàn)證了該方法的可行性。
Zero - coding method is an effective scanning method of wavelet decomposed coefficients , which can eliminate correlation of wavelet coefficients in different resolutions 零樹算法是一種效果比較好的小波系數(shù)掃描編碼方法,可去除不同尺度間的小波系數(shù)幅值的強(qiáng)相關(guān)性。
2 . based on the energy distribution of facial image , a dct - based sparse coding method is proposed to reduce the computational complexity of the original sparse coding 2 .為了減少稀疏編碼的計(jì)算復(fù)雜度,利用人臉圖像能量分布的特點(diǎn),提出了一種基于dct變換的加速算法。
A new transform called " zh - transform " which can operate on binary bitmap is presented and a new shape coding method is designed and implemented based on zh - transform 提出了一個(gè)用于二值圖像的變換? ? zh變換,并在此變換的基礎(chǔ)上設(shè)計(jì)了一個(gè)完整的視頻對(duì)象形狀編碼方案。
Nevertheless , it is not feasible to change the network architecture . so we put emphasis on designing a new coding method for video transmission through internet 然而網(wǎng)絡(luò)體系結(jié)構(gòu)的改變不是一朝一夕的事情,因此,設(shè)計(jì)新的適合網(wǎng)絡(luò)傳輸?shù)囊曨l編碼算法成為本文研究的重點(diǎn)。
The experimental results show that , compared with the method of subband finite state scalar quantization , both of the two wavelet coding methods can achieve better coding performance 實(shí)驗(yàn)結(jié)果表明,與有限狀態(tài)標(biāo)量量化方法相比,這兩種小波編碼方法均能獲得較好的編碼性能。