quadrature mirror filter是什么意思

用法例句

But using quadrature mirror filter and interpolation technology, Subband Coding can g.

要使滤波器具有很陡峭的带通特性,以防止采样率降低,即抽取过程中产生混叠现象,对一般的数字滤波器来说运算量比较大,但子带编码采用正交镜像滤波器QMF以及抽取、内插方法可以大大改善带通滤波器的特性。

Design of QMF with near-perfect reconstruction;

近似重构正交镜像滤波器组的设计

A scheme for layered color image coding based on subband decomposition is proposed,in which color image can be divided into several subbands with different frequency through QMF(Quadrature Mirror Filters) and coded for these subbands individually.

提出了一种基于子带分解的彩色图像分层编码方案,它通过正交镜像滤波器组把彩色图像分成不同频率的子带,并对其分别进行编码。

A simple and effective method for the design of two-band quadrature mirror filter(QMF) banks is proposed,which combined with the linear phase of FIR,the closed formulation of window function,reconstruction theory of QMF banks and conventional iterative method.

本文结合FIR滤波器的线性相位特点、窗函数的封闭表达式、正交镜像滤波器组的重构理论和传统的迭代算法原理,提出了一种基于窗函数法设计两通道FIRQMF滤波器组的方法。

PR-QMF Based Spreading Codes;

利用小波或者小波包的变换与反变换可以构造出具有完全重构性质的滤波器组,提出一种基于完全重构正交镜像滤波器组的新型扩频序列,它不同于传统的扩频序列的二值特性,是一种多值序列。