反余弦

基于全相位反余弦双正交变换的JPEG图像压缩技术

A JPEG Image Compression Technique Based on All Phase Inverse Discrete Cosine Biorthogonal Transform

关于反余弦函数的Shafer-Fink型不等式

On Shafer-Fink Type Inequality of Inverse Cosine

反余弦&波正弦形缓和曲线

Secant one wave sine shaped transition curve

第二，在计算过程中不会出现三角函数，提高了计算效率。本文提出了一种角度为反余弦变化的反余弦一波正弦形缓和曲线，较其它线形有较优的线形特征值。

Second , there are no trigonometrical functions involved in the computation , Which means good computational efficiency . But the trigonometrical functions of ordinary transition curves are of linear variation .

提出了一种基于Loeffler[8]算法的快速实现二维离散余弦变换/反离散余弦变换（2DDCT/IDCT）的方法。

This paper presents a new Loeffler algorithm-based approach to two dimensional forward and Inverse Discrete Cosine Transform ( 2D DCT / IDCT ) for image compressions .

同时根据AVS算法特点，给出了变长解码模块、反整数余弦变换模块和环路滤波模块的硬件实现结构。

Based on the characteristics of AVS algorithms , hardware architectures of variable length decoding module , inverse integer cosine transform module and in-loop deblocking filter module were developed .

介绍了采用基于ROM查找表的全数字反离散余弦变换（IDCT）电路的算法原理及其并行架构的大规模集成电路实现。

This paper presented an ROM look-up table ( LUT ) based inverse discrete cosine transform ( IDCT ) algorithm and its LSI implementation having parallel architecture .

AVS标准采取了大量的新技术，包括：帧内预测、可变块大小的运动补偿、1/4像素精度插值、反整数余弦变换和上下文自适应二进制算术编码等。

AVS standard adopts amounts of new technologies , such as including of intra prediction , adaptive block size motion compensation , integer cosine transformation , quarter-pixel interpolation and context-based adaptive binary arithmetic coding .

利用解析函数的性质，通过反双曲余弦计算出了由共焦点椭圆导体柱面组成的电容器内电场和单位长度的电容，并对结果作了进一步讨论。

The electric field and capacitance of a confocal elliptic capacitor are calculated by the inverse hyperbolic cosine analytic function , and discussion on them is performed .

基于MPEG-2视频可变长解码、反量化、反离散余弦变换的FPGA实现

Implementation of Variable Length Decoder 、 Inverse Quantization and Inverse Discrete Cosine Transform in MPEG-2 with FPGA

解码过程主要由五个部分组成：标记码信息处理、熵解码、反量化、反离散余弦变换和色彩空间转换。

The process of decoding consists of five parts : tag code information processing , entropy decoding , inversed quantization , inversed discrete cosine transform and color space converter .

主要体现在两方面，一方面是本文的方法比H&G算法少了一个熵解码、反量化、反离散余弦变换、运动补偿的计算过程。

In this method the computation power of entropy decoding , inverse quantization , inverse DCT transformation and motion compensation are dramatically reduced comparing to the H & G arithmetic .

还没有包含反双曲三角函数&反双曲余弦、反双曲正弦和反双曲正切。

The inverse hyperbolic trigonometric functions acosh , asinh , and atanh are not yet included .