Transform coding algorithm of ac - 3 digital audio compression 3數(shù)字音頻壓縮中的變換編碼算法
New advances based on the dct transforming coding 編碼的新進(jìn)展
A 3 - d wavelet transform coding scheme for video along the motion trajectory 基于運(yùn)動(dòng)軌跡的視頻三維小波變換方法
The dct was used as the main method of image transform coding for a long time 圖像壓縮編碼長(zhǎng)期以來(lái)利用離散余弦變換( dct )作為變換編碼的主要技術(shù)。
At the same time , we applied this method into reduction of block effects in transform coding successfully 我們還介紹了這種技術(shù)在消除變換編碼方塊效應(yīng)中的成功應(yīng)用。
The fourth chapter discusses the huffman coding method , anticipating coding method and wavelet transform coding method used in this paper 第四章討論了課題中采用的霍夫曼編碼、預(yù)測(cè)編碼和小波變換編碼的理論和方法。
Frequently used major coding methods include predical code , transform code , vectol quantization , wavelet transform code , fractal code , ect 常見的主要編碼方法有預(yù)測(cè)編碼、變換編碼、矢量量化編碼、小波編碼、分形編碼等等。
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。
But be careful . as our example demonstrates , it is very easy to introduce bugs by transforming code in this way , whether it is altered by human hands or by software 但是請(qǐng)注意:就象我們的示例所演示的那樣,以這種方式轉(zhuǎn)換代碼時(shí)很容易引入錯(cuò)誤,不論是由人工還是由軟件來(lái)完成這種轉(zhuǎn)換。
In the second part : the emphasis of this part lies in discussing subband coding , wavelet transform coding and fractal coding , whose coding functions are better than the coding of having dct as the core 因此本文第二部分重點(diǎn)討論了編碼性能要優(yōu)于離散余弦編碼的子帶編碼、小波變換編碼和分形編碼。
Transform coding is a type of data compression for "natural" data like audio signals or photographic images. The transformation is typically lossy, resulting in a lower quality copy of the original input.