查询词典 inverse cosine

The principle of On2 VP6 video decoder is introduced at first,and then the complexity of decoder is analyzed.Both IDCT(inverse discrete cosine transform) and color space conversion,two most timeconsuming modules of decoder,are carried out the optimization of algorithm.

首先介绍了On2 VP6视频解码器的原理，对其复杂度进行了分析，然后对IDCT(inverse discrete cosine transform)、颜色空间转换等解码器中最耗时的两个模块进行了算法优化。

A novel true 2-D nonseparable wavelet filter bank-all phase discrete inverse cosine sequency filter was presented.

构造了一组新的纯二维不可分离的小波滤波器―全相位离散反余弦列率滤波器。

Strength of SPBT was numerically explained on the base of Perdersen discharge model of ellipsoid void, and the conclusion was got that the discharge strength of void was an inverse measure of the cosine of oriented angle of void.

本文首次利用Perdersen的棉球气孔放电模型，定量解释了SPBT瓷体局部放电起始场强的大小，并得到瓷体中气孔发生放电的外施场强与此气孔取向角余弦成反比的结论。

Based on the analysis of the influence to the testing result induced by the roller parameters, such as the diameter, attachment coefficient and locating angle, the thesis proves that, through construction of a mechanics model of the rig to calculate the biggest braking forcing which can be detected, the detectible braking force has a direct ratio with the roller attachment coefficient and a inverse ratio with the cosine of the locating angle.

在分析了汽车滚筒反力式制动检验台的滚筒直径、滚筒的附着系数及安置角对检测结果影响的基础上，通过建立力学模型计算汽车滚筒反力式制动检验台所能检测到的最大汽车制动力得出结论：汽车滚筒反力式制动检验台所能检测到的制动力与滚筒的附着系数成正比，与安置角的余弦成反比。

Based on characteristics of NEC VR4122(μPD30122) microprocessor, optimization methods on IMDCT(Inverse Modified Discrete Cosine Transform) of Ogg Vorbis audio decoding program are presented.

针对NEC VR4122(μPD30122)微处理器的特点，从算法优化和存储空间优化2个方面，对开放源代码的Ogg 音频解码的IMDCT进行性能优化。

In this article, the BINIDCT algorithm, a fast approximation of the Discrete Cosine Inverse Transform and its efficient VLSI architectures for hardware implementations with Wishbone bus are presented.

1引言离散余旋变换(Discrete Cosine Transform，DCT)和其反变换(Inverse Discrete Cosine Trans-form，IDCT)广泛地应用于图像和视频压缩、解压缩领域中，其中包括JPEG、MPEG1-2、H.26x、MPEG4等图像标准中。

Am1 integer-output 8x8 inverse discrete cosine transform.

执行整数输出8x8反向离散余弦变换精度。

The layered video decoding system comprises a base layer decoder for receiving and decoding a base layer video stream; and an enhancement layer decoder for receiving an enhancement layer video stream and the decoded base layer stream, and generating a decoded enhanced video output, wherein the enhancement layer decoder includes: a plurality of inverse discrete cosine transform /IDCT modules; and a selection system for selecting one of the IDCT modules.

分层视频译码系统包括：基本层译码器，用于接收和译码基本层视频流；和增强层译码器，用于接收增强层视频流和所译码的基本层流，并生成译码的增强的视频输出，其中该增强层译码器包括：多个反离散余弦变换模块；和用于选择其中一个IDCT模块的选择系统。

This paper proposes a novel interpolator that is the All Phase Inverse Discrete Cosine Sequency Filter. Based on the theory of the All Phase, the APIDCSF considers the surrounding samples'influence on the center one throughly, and takes the average of IDCT orthogonal filtering of surrounding sampling blocks which include the center sample as its orthogonal transformed value.

在全相位理论的基础上，充分考虑了周围邻域对中心样本的影响，以包含该中心样本的所有邻域正交变换滤波的均值作为其正交变换滤波值，构造了全相位离散反余弦列率滤波器组(All Phase Inverse Discrete Cosine Sequency Filter， APIDCSF)，其内插性能好于高阶消失矩的环形Neville滤波器。

Based on the foregoing strategy, we choose Inverse Modified Discrete Cosine Transform and Polyphase Synthesis Filterband of the MP3 decoder by an ASIC implementation. Moreover, to further reduce the hardware cost, we use CORDIC-based calculations and merging some arithmetic operations to replace the original ones of IMDCT and PSF.

基於前述的原则及由运算量的统计分析，我们选定「反转修正式离散余弦转换(Inverse Modified Discrete Cosine Transform， IMDCT)」与「多相位合成滤波频带(Polyphase Synthesis Filterband， PSF)」使用ASIC方式实现，同时为了有效降低这两个模组的硬体成本，我们导入「座标轴旋转数位计算机」及合并运算方式取代原始算术运算，使得新的计算式有效降低原IMDCT约74%之乘法及约49%加法运算，而在多相位合成滤波频带的反离散余弦转换也有降低约33.4%之乘法及约24.6%之加法运算。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。