信号抽样

一种便于观测的信号抽样及复原方法

A Layout of Easily Observed Signal Sampling and Restoring

正弦信号抽样序列的周期性与伪调制性

Periodicity and Fake Modulation of Sinusoidal Signal Sampling Sequence

带限信号抽样问题的一种改进重构算法

An Improved Reconstruction Algorithm for Band-limited Signal Sampling

正弦信号抽样的周期性与伪调制性。着重讨论连续信号采样过程中抽样定理对正弦信号的非整数抽样序列的周期性，伪调制性和调制周期的周期性。

Periodicity and pseudo-modulation when sampling sinusoidal Signals The periodicity and pseudo-modulation due to non-integral sampling of sinusoidal signal are analyzed .

在介绍了小型断路器可靠性试验装置中大电流试验柜工作原理的基础上，引入信号抽样、信号重构理论，阐述了对试验电流的采样及分析、计算处理过程。

Based on the working principle of a big current test cabinet in the reliability tests devices for small circuit breakers , the signal sampling theory and signal reconstitution theory were introduced . The sampling of test current and its analysis and calculation were expounded .

Sigma-Delta调制器以极高的抽样频率对输入模拟信号进行抽样，并对两个抽样之间的差值进行低位量化，从而得到用低位数码表示的数字信号，即Sigma-Delta码。

The input analog signal is sampled at a very high frequency and the difference between two samplings is quantified to get digital signal , i.e. , Sigma-Delta code .

探讨了周期平稳信号的抽样；

Discussed in this paper is the sampling of the cyclic stationary signals .

汉语词汇声音信号的抽样算法

An Algorithm for Sampling Signals of Chinese Pronunciation

周期平稳信号的抽样

The Sampling of the Cyclic Stationary Signals

为在计算机上做傅里叶级数的分解，需要对连续信号进行抽样，然后按离散傅里叶级数进行分解。

In order to analyzing digital signals with the aid of computers , it is necessary to use Fourier Series of discrete form .

所谓数字电视技术，是将传统的模拟电视信号经过抽样、量化和编码转换成用二进制数代表的数字式信号，然后进行各种功能的处理、传输、存储和记录的技术。

In digital TV , the analog signal is sampled , quantified and coded into digital signal . Digital signal is easier to process , transmit and store .

得出结论：只有抽样信号最低抽样率大于两倍信号带宽时，才能保证信号的无失真恢复。

The conclusion is that only when the minimum sample rate is more than the double of the band of the signal , can the signal been resumed without distortion .

模拟信号的抽样（采样）实现了时域的离散。由于其固有的乘积环节，抽样实现了频谱的线性搬移。

Sampling process realizes the analog signal discretization on the time domain , and for its inherent multiplying function , it also completes the linear spectrum conversion on frequency domain .

数字视频序列可以看作是从模拟视频信号中抽样得到，帧间相关性过强是由于采样过密造成的；

Digital video sequence can be regarded as sampling of analogue video signal , sampling too intensive can make the intraframe relationship higher , and sampling too sparse can make the intraframe relationship lower .

采用频谱不相互重叠的余弦信号的抽样作为数字指纹，通过扩频将指纹嵌入到原始图像的中频系数中。

In this scheme , the fingerprinting , which is a random sample from Cosine signal with no spectral overlap , is embedded in the middle-frequency coefficients of the original image through the spreading sequences .

高清晰度数字电视（HDTV）对PAL彩色全电视信号采用4fsc抽样，其数码率425.6274Mbit/s。

In the high definition digital television ( HDTV ), PAL TV signal is sampled with 4 f sc . The code rate is 425.627 4 Mbit / s.

再由语音信号谱包估计抽样自相关，用IDFT提取抽样自相关估计。

The spectral envelope is the mel frequency scale and IDFT is used to extract the estimate of sample autocorrelations .

混合信号系统非均匀抽样信号的分析和重构

Analysis and Reconstruction of Non-uniformly Sampled Signals in Mixe-dsignal Integrated Circuits

本文论述了电机振动信号的测量与抽样方法，通过对量化的振动信号样本集做快速富里叶变换运算，得到电机振动信号的数字谱图.这种数字谱分析可以在普通数字电子计算机上实现。

The paper deals with the method to get the sample of vibration signal of the electric machines , and the digital spectrum of the vibration signal is calculated with FFT .

本文试图用信号线性逼近的方法和正交分解的理论导出周期序列离散傅里叶级数DFS关系式。为在计算机上做傅里叶级数的分解，需要对连续信号进行抽样，然后按离散傅里叶级数进行分解。

In this paper the expression of discrete Fourier series ( DFS ) for periodic sequences has been deduced from periodic sequence linear approximation and orthogonal decomposition . In order to analyzing digital signals with the aid of computers , it is necessary to use Fourier Series of discrete form .