Self-adaptive quantification method and device based on size of transform block

基于变换块大小的自适应量化方法及装置

Abstract

The invention provides a self-adaptive quantification method and device based on size of a transform block. A present multidimensional quantification vector corresponding to the transform block is decomposed into multiple quantification vectors, and an optimal quantification parameter deviant corresponding to each quantification vector is calculated; according to the optimal quantification parameter deviants, a suboptimal quantification vector of the multidimensional quantification vector is obtained; and a corresponding quantification parameter is calculated according to the suboptimal quantification vector, and a quantification step length is selected according to the quantification parameter. The video compression efficiency and coding performance are improved greatly.
本发明实施例提供一种基于变换块大小的自适应量化方法及装置。将变换块对应的当前多维量化矢量分解为多个量化矢量,并对每一个所述量化矢量求相应的最优量化参数偏移值;根据所述最优量化参数偏移值,获取所述多维量化矢量的次优量化矢量;根据所述次优量化矢量计算相应的量化参数,根据所述量化参数选择量化步长。极大提高了视频压缩效率以及编码性能。

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (0)

    Publication numberPublication dateAssigneeTitle

NO-Patent Citations (0)

    Title

Cited By (0)

    Publication numberPublication dateAssigneeTitle