Electroacoustics - octave - band and fractional - octave - band filters iec 61260 : 1995 a1 : 2001 ; german version en 61260 : 1995 a1 : 2001 電聲學.倍頻程頻帶和分倍頻程頻帶濾波器
Without much theoretical deduction in this dissertation , we focus mainly on the several characteristics of wavelet , such as the localization in both the spatial and the frequency domain derived from the compact support in the two domains ; the rnultiresolution representation property ; and the octave divided frequency property , etc . after a brief overview of the principles and methods of image compression , video coding algorithms are introduced including 3 - d wavelet video coding and 2 - d wavelet video coding . based on the above , the research of this dissertation consists of three aspect : firstly , the 3d - spiht algorithm is modified which optimizes bit allocation 具體說,本論文包括以下內容:首先,本文分析介紹了小波理論,文中沒有過多的理論推導,而是從小波具有的一些特性,如時頻局部性、多分辨率分解特性和倍頻程頻帶分解特性入手,力求對小波變換有一個宏觀的了解。其次,介紹了基于小波的圖像編碼的原理和常用的編碼方法。最后,介紹了基于小波的視頻編碼的方法,一種是基于3 ? d小波視頻編碼,另一種是基于2 ? d的小波視頻編碼方法。